Disclosure of Invention
The invention aims to provide a driving device, a driving assembly, a vehicle and a control method of the driving device, and aims to solve the problems of how to reduce the temperature of a stator assembly, improve the thermal management capability of the driving device and improve the reliability of the driving device.
In order to achieve the above purpose, the invention adopts the following technical scheme:
The embodiment of the application provides a driving device which comprises a stator assembly, a rotor assembly, an oil circuit assembly and a first flow valve. The rotor assembly is movably inserted into the stator assembly, the oil way assembly comprises an oil inlet pipe, a stator branch oil pipe and a rotor branch oil pipe, the stator branch oil pipe is connected between the stator assembly and the oil inlet pipe, and the rotor branch oil pipe is connected between the rotor assembly and the oil inlet pipe. The first flow valve is used for adjusting the flow of the rotor branch oil pipe so as to control the flow of the stator branch oil pipe.
According to the driving device provided by the embodiment of the application, through the arrangement of the oil circuit component, the first fluid in the oil inlet pipe can be conveyed to the stator component and the rotor component, so that the cooling and lubrication of the stator component and the rotor component are realized, the service life of the driving device can be prolonged, and the reliability of the driving device is improved. Through the setting of first flow valve, can be under the high-speed operating mode of rotor subassembly, carry the flow to the first fluid of rotor subassembly to advance in the oil pipe and adjust, reduce because the rotor subassembly rotational speed is too fast and produce the negative pressure and make too much first fluid carry to the probability of rotor subassembly, increase advance the flow of the first fluid of carrying to stator subassembly in the oil pipe, thereby carry out accurate distribution to the flow of first fluid, the probability of stator subassembly overtemperature has been reduced, drive arrangement's thermal management ability has been improved.
In some embodiments, the rotational speed of the rotor assembly is greater than or equal to 10000RPM.
According to the driving device provided by the embodiment of the application, through setting the rotating speed of the rotor assembly, when the rotating speed is greater than or equal to 10000RPM, the flow of the rotor branch oil pipe is required to be regulated by controlling the opening of the first flow valve so as to control the flow of the stator branch oil pipe, so that the control of the first flow valve is more accurate.
In some embodiments, the rotational speed of the rotor assembly is 20000RPM or greater.
According to the driving device provided by the embodiment of the application, through setting the rotating speed of the rotor assembly, when the rotating speed is more than or equal to 20000RPM, the pressure difference generated in the rotor assembly is larger compared with the atmospheric pressure due to the fact that the rotating speed of the rotor assembly is large, so that the flow of the stator branch oil pipe needs to be controlled by controlling the first flow valve, and the control of the first flow valve is more accurate and efficient.
In some embodiments, the rotor assembly is operable at a first rotational speed and a second rotational speed, the second rotational speed being greater than the first rotational speed, the first flow valve opening being a first opening and the flow of the rotor branch conduit being a first flow when the rotor assembly is at the first rotational speed, the first flow valve opening being a second opening and the flow of the rotor branch conduit being a second flow when the rotor assembly is at the second rotational speed, the first opening being greater than the second opening, the second flow being greater than the first flow.
According to the driving device provided by the embodiment of the application, the first flow valve is set to be at the first opening degree under the first rotating speed of the rotor assembly, and the first flow valve is set to be at the second opening degree under the second rotating speed, so that the opening degree of the first flow valve can be regulated according to different rotating speeds of the rotor assembly, the flow rates of the first fluid in the rotor branch oil pipe and the stator branch oil pipe can be balanced, the probability of too much and too little flow rate of the first fluid in the stator branch oil pipe can be reduced, and the thermal management capability of the driving device can be improved.
In some embodiments, the first rotational speed is greater than 0 and less than or equal to 20000RPM, and the second rotational speed is between 20000RPM and A, 23000RPM < A < 27000RPM.
According to the driving device provided by the embodiment of the application, the first flow valve of the driving device is more convenient in the implementation process and is beneficial to use by setting the specific values of the first rotating speed and the second rotating speed.
In some embodiments, the rotor assembly is operable at a third rotational speed that is greater than the second rotational speed, and when the rotor assembly is at the third rotational speed, the opening of the first flow valve is a third opening, the flow rate of the rotor branch conduit is a third flow rate, the third flow rate is greater than the second flow rate, and the third opening is greater than the first opening.
According to the driving device provided by the embodiment of the application, the first flow valve is set to be at the third opening degree at the third rotating speed of the rotor assembly, so that when the rotating speed of the rotor assembly is high, the flow of the first fluid flowing into the stator branch oil pipe is high, the heat exchange effect of the first fluid on the stator assembly is ensured, and the heat exchange reliability of the driving device is improved.
In some embodiments, the third rotational speed satisfies A or more.
According to the driving device provided by the embodiment of the application, the first flow valve of the driving device is more convenient in the implementation process and is beneficial to use by setting the specific value of the third rotating speed, the heat exchange effect on the stator assembly is improved by adjusting the first flow valve, and meanwhile, the probability that excessive first fluid flows into the rotor branch oil pipe is reduced.
In some embodiments, the first flow valve is mounted to the rotor leg and/or the stator leg.
According to the driving device provided by the embodiment of the application, the first flow valve is arranged on the rotor branch oil pipe, so that the flow of the first fluid in the rotor branch oil pipe can be accurately controlled, and the regulation and control efficiency of the first flow valve on the flow of the first fluid in the stator branch oil pipe can be improved by directly controlling the flow of the first fluid in the rotor branch oil pipe.
In some embodiments, the first flow valve comprises a proportional solenoid valve.
According to the driving device provided by the embodiment of the application, the first flow valve is arranged, so that the remote control of the first flow valve can be realized, the flow of the first fluid can be accurately controlled, and the controllability is high.
In some embodiments, the stator assembly includes a stator body and windings. The stator body is the tube-shape, and the stator body has a plurality of first runners, and the both ends of first runner are located stator body along axial both ends respectively, and stator oil pipe and first runner intercommunication are propped up, and stator body inner wall is equipped with a plurality of bulge windings around locating the bulge, and the winding is followed stator body axial protrusion and is set up in the stator body.
According to the driving device provided by the embodiment of the application, through the arrangement of the first flow channel, the first flow channel is connected with the stator branch oil pipe, so that the first fluid can be conveyed to the stator body, the cooling of the stator body and the winding is realized, the probability of over-temperature of the stator assembly is reduced, secondly, the two ends of the first flow channel are respectively arranged at the two ends of the stator body along the axial direction X, the first flow channel is embedded in the stator body, the contact area of the first fluid flowing into the first flow channel and the stator body can be increased, and the cooling efficiency of the stator assembly is improved.
In some embodiments, each of the first flow channels extends in an axial direction of the stator body.
According to the driving device provided by the embodiment of the application, through the arrangement that each first runner extends along the axial direction X of the stator body, the uniformity of cooling the stator assembly can be improved, the manufacturing process can be simplified, and the processing is easy.
In some embodiments, the first sub-path has one end communicated with the first flow channel, the second sub-path has one end communicated with the first flow channel, the connecting sub-path has a first port communicated with the oil inlet pipe, a second port communicated with the other end of the first sub-path, and a third port communicated with the other end of the second sub-path.
According to the driving device provided by the embodiment of the application, the arrangement of the first sub-path, the second sub-path and the connecting sub-path improves the rationality of the arrangement of the stator branch oil pipes, not only can the functions of the stator branch oil pipes be ensured, but also the occupation of the stator branch oil pipes to the driving device can be reduced, and the driving device is reasonable in layout and compact in structure.
In some embodiments, the oil inlet pressure of the first sub-circuit is not equal to the oil inlet pressure of the second sub-circuit.
According to the driving device provided by the embodiment of the application, through the arrangement, the flow of the first fluid in the interval corresponding to the first sub-path and the second sub-path in the first flow path can be promoted, the probability of trapped oil is reduced, the cooling effect is improved, and the probability of overtemperature is reduced.
In some embodiments, the stator branch oil pipe further includes a valve mounted to a portion of the second sub-path or the connection sub-path between the second port and the third port such that an oil inlet pressure of the second sub-path is less than an oil inlet pressure of the first sub-path.
According to the driving device provided by the embodiment of the application, through the arrangement of the valve, the space is fully utilized, the space for installing the valve is not required to be arranged at the connecting sub-path again, and the space utilization rate of the driving device is improved.
In some embodiments, the stator further comprises an end cap assembly connected to one end of the stator body in an axial direction, the end cap assembly having a chamber through which the stator branch oil tubes communicate with the plurality of first flow passages, respectively.
According to the driving device provided by the embodiment of the application, through the arrangement of the end cover assembly, at least one end part of the stator assembly is cooled, the cooling efficiency of the end part of the stator assembly is improved, in addition, the stator branch oil pipe flows into the first flow passage through the end cover assembly, the communication between the stator branch oil pipe and the first flow passage is convenient to realize, and the connecting structure between the stator branch oil pipe and the first flow passage is simplified.
In some embodiments, the end cap assembly has a fluid inlet in communication with the chamber and the stator leg tube is in communication with the fluid inlet.
According to the driving device provided by the embodiment of the application, through the arrangement of the liquid inlet holes, the connection between the stator branch oil pipe and the end cover assembly is realized.
In some embodiments, the end cap assembly has a fluid outlet aperture in communication with the chamber.
According to the driving device provided by the embodiment of the application, through the arrangement of the liquid outlet holes, the first fluid can flow out of the stator assembly, and the circulation of the first fluid is facilitated.
In some embodiments, the end cap assembly is provided with a plurality of relief holes on a side of the end cap assembly adjacent to the stator body, and at least a portion of the windings are inserted into the relief holes and extend into the cavity.
According to the driving device provided by the embodiment of the application, through the arrangement of the avoidance holes, the winding can be cooled and lubricated when the first fluid flows into the cavity, the contact area between the winding and the first fluid is increased, and the cooling and lubricating effects are more uniform.
In some embodiments, a sealing medium is filled between the windings and the end cap assembly.
According to the driving device provided by the embodiment of the application, due to the arrangement that the sealing medium is filled between the winding and the end cover assembly, the first fluid entering the cavity can accurately cool the winding positioned at the end part of the stator body, and the accuracy of the cooling position is improved.
In some embodiments, the end cap assembly includes a cover portion, a gasket. The gasket is located between the cover portion and the stator body, the gasket and the cover portion enclose to form a cavity, the gasket is provided with an avoidance hole, the gasket cover is arranged at one end of the stator body, and the first flow passage is arranged in an area, which is not covered by the gasket, of the end face of the stator body.
According to the driving device provided by the embodiment of the application, the production process of the end cover assembly is simplified through the arrangement of the cover part and the gasket, and the cover part and the gasket are simply assembled.
In some embodiments, the rotor assembly includes a second flow passage, and the rotor branch oil pipe communicates with the second flow passage.
According to the driving device provided by the embodiment of the application, through the arrangement of the second flow channel, the rotor assembly can be cooled through the first fluid, so that the demagnetizing probability of the rotor magnetic steel is reduced.
In some embodiments, the rotor assembly comprises a rotor shaft and a rotating part, the rotor shaft extends along the axial direction of the stator assembly, the rotating part is sleeved on the rotor shaft, and the second flow passage comprises a first sub flow passage, a second sub flow passage and a third sub flow passage. The first sub-runner is arranged on the rotor shaft, the first sub-runner is communicated with the rotor branch oil pipe, the second sub-runner is arranged on the rotating part, the second sub-runner extends along the radial direction of the rotating part, the third sub-runner is arranged on the rotating part, the third sub-runner extends along the axial direction, and the second sub-runner is respectively communicated with the first sub-runner and the third sub-runner.
According to the driving device provided by the embodiment of the application, through the arrangement that the second flow passage comprises the first sub flow passage, the second sub flow passage and the third sub flow passage, the first fluid can flow into the first sub flow passage to cool the rotor shaft, and can flow into the second sub flow passage and the third sub flow passage to cool the rotating part, so that each part of the rotor assembly can be sufficiently cooled, and the cooling effect on each position of the rotor assembly is improved to enable the cooling to be sufficient.
In some embodiments, the first sub-flow channel extends in an axial direction, the first sub-flow channel has a first end and a second end, the number of the second sub-flow channels is a plurality, a part of the second sub-flow channel is connected with the first end, and another part of the second sub-flow channel is connected with the second end.
According to the driving device provided by the embodiment of the application, through the arrangement that part of the second sub-flow channel is connected with the first end and the other part of the second sub-flow channel is connected with the second end, the first fluid flows into the second sub-flow channel from the two ends of the first sub-flow channel, and the probability that the first fluid only flows into one end of the first sub-flow channel to accumulate heat at the other end of the first sub-flow channel is reduced.
In some embodiments, the number of the third sub-flow passages is a plurality, the third sub-flow passages are correspondingly communicated with the second sub-flow passages, each third sub-flow passage comprises a plurality of branch flow passages extending along the axial direction, the plurality of branch flow passages are arranged at intervals along the circumferential direction of the rotor shaft, and each second sub-flow passage is communicated with the plurality of branch flow passages in the corresponding third sub-flow passages.
According to the driving device provided by the embodiment of the application, through the arrangement of the plurality of branch flow passages, and the second sub flow passages are communicated with the plurality of branch flow passages in the corresponding third sub flow passages, different sub parts of the rotating part can be cooled, and the uniformity of cooling the rotating part is improved.
In some embodiments, the third sub-runner has an oil-throwing port located at an axial end of the rotating part, and in a radial direction of the rotating part, the oil-throwing port is disposed corresponding to the stator assembly to emit oil toward the stator assembly.
According to the driving device provided by the embodiment of the application, through the arrangement of the oil throwing port, the first fluid in the second flow passage can flow out, so that the circulating flow of the first fluid in the second flow passage is realized, the oil injection to the windings of the stator assembly is facilitated, and the lubrication effect on the windings is improved.
In some embodiments, the drive device has a third flow passage for heat exchange with an outer wall of the stator assembly.
According to the driving device provided by the embodiment of the application, the outer wall of the stator assembly can be cooled through the arrangement of the third flow passage, so that the heat dissipation efficiency of the outer wall of the stator assembly is improved, the working probability of the stator assembly in a controllable temperature range is improved, and the service life of the driving device can be further prolonged.
In some embodiments, the driving device further comprises a housing assembly, wherein the housing assembly is enclosed on the outer wall of the stator, and a third flow passage is formed inside the housing assembly.
According to the driving device provided by the embodiment of the application, the stator assembly can be protected through the arrangement of the shell assembly, the probability of mechanical damage of the stator assembly is reduced, the anti-seismic performance of the driving device can be improved, and the utilization rate of space can be improved by integrating the third flow passage through the shell assembly.
In some embodiments, the third flow channel includes a first portion, a second portion. The first part extends along the axial direction of the stator assembly, the second part comprises a plurality of sub-parts which extend along the circumferential direction of the stator and are sequentially arranged along the axial direction, each two adjacent sub-parts are connected end to end, and one of the sub-parts positioned at two axial ends is connected with the first part, so that the first part and the second part are communicated to form a third flow passage.
According to the driving device provided by the embodiment of the application, through the arrangement of the first part and the second part, the structure is compact, so that a longer cooling path is realized for the third flow passage, the cooling effect is more uniform, and the space can be saved.
In some embodiments, the drive device further comprises a supply device. The feeding device is connected with an oil inlet pipe of the oil circuit assembly, and the feeding device can supply first fluid to the oil inlet pipe.
According to the driving device provided by the embodiment of the application, through the arrangement of the supply device, the first fluid is supplied to the oil inlet pipe by utilizing the inside of the driving device, and the external connection of the supply piece is not needed, so that the integration effect of the driving device is improved.
In some embodiments, the supply means comprises a heat exchanger for cooling the first fluid supplied to the oil inlet pipe.
According to the driving device provided by the embodiment of the application, through the arrangement of the heat exchanger, heat exchange can be carried out with the first fluid, so that the temperature of the first fluid flowing into the oil inlet pipe is ensured to be in a preset range, and the cooling effect of the first fluid on the stator assembly and the rotor assembly is further ensured.
In some embodiments, the heat exchanger includes an oil inlet pipe, an oil outlet pipe, and a first connecting pipe connected between the oil inlet pipe and the oil outlet pipe, the first connecting pipe selectively communicating the oil inlet pipe and the oil outlet pipe.
According to the driving device provided by the embodiment of the application, through the arrangement that the heat exchanger comprises the oil inlet pipe, the oil outlet pipe and the first connecting pipe, the oil inlet pipe and the oil outlet pipe can be selectively communicated, and when the temperature of the first fluid is higher, the communication of the oil inlet pipe and the oil outlet pipe can be controlled, so that the stator assembly and/or the rotor assembly can be effectively cooled. When the temperature of the first fluid is lower, the first fluid and the second fluid can be controlled to be disconnected, so that the first fluid can be insulated, and the probability that the viscosity of the first fluid is reduced due to the excessively low temperature to increase the stirring loss is reduced.
In some embodiments, the supply device further comprises a first valve configured to selectively communicate the first connection tube to the oil line and the oil line.
According to the driving device provided by the embodiment of the application, the step of selectively communicating the oil inlet pipe with the oil outlet pipe by the first connecting pipe is more convenient to realize by the arrangement of the first valve.
In some embodiments, the supply device further comprises a first drive pump for driving the first fluid to supply the oil feed pipe.
According to the driving device provided by the embodiment of the application, through the arrangement of the first driving pump, the flow of the first fluid is driven, and conditions are created for cooling.
In some embodiments, the heat exchanger has cooling flow channels inside for circulating a cooling medium, the cooling flow channels being capable of exchanging heat with the first fluid to cool the first fluid.
According to the driving device provided by the embodiment of the application, through the arrangement of the cooling flow channel and the first fluid for heat exchange, the structure of the heat exchanger is simple, and the realization is easy.
In some embodiments, the driving device further comprises a shell assembly, the shell assembly is arranged on the outer wall of the stator assembly in a surrounding mode, a third flow channel is formed in the shell assembly, the feeding device further comprises a liquid inlet pipe, a first liquid outlet pipe, a second liquid outlet pipe and a second valve, the liquid inlet pipe is communicated with one end of the cooling flow channel, the other end of the cooling flow channel is selectively communicated with the first liquid outlet pipe and the second liquid outlet pipe through the second valve, the first liquid outlet pipe is communicated with the third flow channel, and the second liquid outlet pipe is suitable for being communicated with a water circulation system of a vehicle.
According to the driving device provided by the embodiment of the application, through the arrangement, the cooling medium in the cooling flow channel can cool the first fluid in the heat exchanger and also can exchange heat with the outer wall of the stator assembly, so that the multifunctional utilization of the cooling medium is realized.
In some embodiments, the supply device further comprises a second drive pump for driving the flow of the cooling medium.
According to the driving device provided by the embodiment of the application, through the arrangement of the second driving pump, the cooling medium can be driven, so that the cooling medium can be circulated.
The embodiment of the application provides a driving assembly, which comprises any driving device.
According to the driving assembly provided by the embodiment of the application, through the arrangement of the driving device, the heat exchange process in the driving device can be controlled more efficiently, the heat exchange capacity of the driving assembly is improved, and the service life of the driving assembly is prolonged.
An embodiment of the application provides a vehicle comprising any one of the above drive assemblies.
According to the vehicle provided by the embodiment of the application, through the arrangement of the driving assembly, the driving assembly comprises the driving device, so that the stator assembly and the rotor assembly of the driving device can be cooled, and the running reliability of the vehicle is improved.
The control method of the driving assembly comprises the step of adjusting the opening degree of the first flow valve when the rotating speed of the rotor assembly meets a first preset condition.
The embodiment of the application provides a control method of a driving assembly, by the arrangement, the opening degree of a first flow valve can be adjusted under a first preset condition, so that the high-efficiency control of the first flow valve is realized, the probability of increasing the flow of a first fluid flowing into a rotor assembly due to negative pressure generated by the higher rotating speed of the rotor assembly can be reduced, and the cooling effect of a stator assembly is further improved.
In some embodiments, the first predetermined condition is that the rotational speed of the rotor assembly is greater than 10000RPM, or the first predetermined condition is that the rotational speed of the rotor assembly is greater than 20000RPM.
The embodiment of the application provides a control method of a driving assembly, by the arrangement, the opening degree of a first flow valve can be adjusted more accurately according to the state of a rotor assembly.
In some embodiments, if the rotation speed of the rotor assembly is greater than 0 and less than or equal to 20000RPM, controlling the opening of the first flow valve to be a first opening and the flow of the rotor branch oil pipe to be a first flow, if the rotation speed of the rotor assembly is greater than 20000RPM and less than or equal to A,23000RPM is less than or equal to A and less than or equal to 27000RPM, controlling the opening of the first flow valve to be a second opening and the flow of the rotor branch oil pipe to be a second flow, and if the rotation speed of the rotor assembly is greater than A, controlling the opening of the first flow valve to be a third opening and the flow of the rotor branch oil pipe to be a third flow, wherein the third opening is greater than the first opening, the first opening is greater than the second opening, and the third flow is greater than the second flow, and the second flow is greater than the first flow.
The embodiment of the application provides a control method of a driving assembly, through the arrangement, the flow of a rotor branch oil pipe is controlled by adjusting the opening of a first flow valve so as to adapt to the working requirements of the rotor assembly at different rotating speeds, and the control strategy is beneficial to improving the efficiency and the reliability of the driving device.
In some embodiments, the opening of the first flow valve is adjusted when the temperature information of the stator assembly satisfies a second predetermined condition.
The embodiment of the application provides a control method of a driving assembly, which can improve the probability of safe and efficient operation of the driving device and is beneficial to improving the adaptability and reliability of the driving device by monitoring the temperature and dynamically adjusting the opening of a first flow valve according to a second preset condition through the flow control strategy based on the temperature of a stator assembly.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected. Can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In embodiments of the present invention, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one does not exclude the presence of other like elements in a process, article or apparatus that comprises the element.
In embodiments of the invention, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g." in an embodiment of the present invention is not to be taken as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.
In the description of the present specification, a particular feature, structure, material, or characteristic may be combined in any suitable manner in one or more embodiments or examples.
The application provides a vehicle. The vehicle can be a pure electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, an extended range electric vehicle, a fuel vehicle and the like. The vehicle may also be a car, van, coach, truck, trailer, etc.
As shown in fig. 1, fig. 1 is a schematic diagram of a vehicle 10 according to an embodiment of the present application. The vehicle 10 includes a vehicle body 11 and wheels 12. The vehicle body 11 is used for riding a driver and carrying articles, and wheels 12 are mounted below the vehicle body 11 for carrying the vehicle body 11 and capable of rolling on a road surface to run the vehicle 10.
The vehicle 10 also includes a drive assembly that includes a drive device that functions to convert electrical energy to mechanical energy for driving the vehicle 10.
The specific structure of the driving device will be described in detail.
Referring to fig. 2 to 6, fig. 2 is a schematic perspective view showing a cooling flow path in the driving device of the vehicle shown in fig. 1, fig. 3 is a schematic cross-sectional view showing a part of a stator assembly of the driving device shown in fig. 2, fig. 4 is an exploded schematic view showing a stator assembly of the driving device shown in fig. 2, fig. 5 is an enlarged schematic view showing an area F shown in fig. 4, and fig. 6 is a schematic plan view showing a part of the driving device shown in fig. 2. An embodiment of the present application provides a driving apparatus including a stator assembly, a rotor assembly, an oil path assembly 130, and a first flow valve 140. The rotor assembly is movably inserted in the stator assembly, the oil path assembly 130 comprises an oil inlet pipe 131, a stator branch oil pipe 132 and a rotor branch oil pipe 133, the stator branch oil pipe 132 is connected between the stator assembly and the oil inlet pipe 131, and the rotor branch oil pipe 133 is connected between the rotor assembly and the oil inlet pipe 131. The first flow valve 140 is used for adjusting the flow rate of the rotor branch oil pipe 133 to control the flow rate of the stator branch oil pipe.
The oil inlet pipe 131, the stator branch oil pipe and the rotor branch oil pipe 133 are internally used for conveying a first fluid, and the first fluid can cool and lubricate the stator assembly and the rotor assembly.
The first flow valve 140 includes, but is not limited to, a proportional solenoid valve, an electrically-operated regulator valve, and the like.
According to the driving device provided by the embodiment of the application, through the arrangement of the oil circuit assembly 130, the first fluid can be conveyed to the stator assembly and the rotor assembly in the oil circuit assembly 130, so that the stator assembly and the rotor assembly are cooled and lubricated, the service life of the driving device can be prolonged, and the reliability of the driving device is improved. Through the setting of the first flow valve 140, the flow of the first fluid conveyed to the rotor assembly can be regulated under the high-speed working condition of the rotor assembly, the probability that the excessive first fluid is conveyed to the rotor assembly due to the fact that the negative pressure is generated due to the fact that the rotating speed of the rotor assembly is too high is reduced, the flow of the first fluid is accurately distributed, the probability that the stator assembly is overheated is reduced, and the thermal management capability of the driving device is improved.
In some embodiments, the rotational speed of the rotor assembly is greater than or equal to 10000RPM.
According to the driving device provided by the embodiment of the application, through setting the rotating speed of the rotor assembly, when the rotating speed is greater than or equal to 10000RPM, negative pressure is generated in the rotor branch oil pipe 133 due to the fact that the rotating speed of the rotor assembly is greater, under the action of the negative pressure, the amount of first fluid entering the rotor branch oil pipe 133 is greater than the amount of expected first fluid, so that the amount of first fluid entering the stator branch oil pipe 132 is smaller than the amount of expected first fluid, the stator assembly is not sufficiently cooled and is in an over-temperature fault, and the flow of the rotor branch oil pipe 133 needs to be regulated by controlling the opening of the first flow valve 140 so as to control the flow of the stator branch oil pipe 132, so that the control of the first flow valve 140 is more accurate.
In the embodiment of the present application, the first flow valve 140 is used for adjusting the flow rate of the oil on the rotor branch oil pipe 133, and the larger the opening of the rotor assembly is, the larger the flow rate flowing to the rotor branch oil pipe 133 is.
The first flow valve 140 may be mounted on the rotor branch pipe 133 or the stator branch pipe 132.
When the first flow valve 140 is mounted on the rotor branch oil pipe 133, the flow rate of the oil flowing into the rotor branch oil pipe 133 can be directly controlled, and the larger the opening degree of the first flow valve 140 is, the larger the flow area of the first flow valve 140 is, and the larger the flow rate of the oil flowing into the rotor branch oil pipe 133 from the oil inlet pipe is.
It should be noted that, when the first flow valve 140 is mounted on the stator branch oil pipe 132, the flow rate of the oil in the rotor branch oil pipe 133 can be indirectly controlled, and the larger the opening of the first flow valve 140 is, the smaller the flow area of the oil flowing from the oil inlet pipe into the stator branch oil pipe 132 is, so that the larger the flow rate flowing into the rotor branch oil pipe 133 is.
Specifically, the change in opening degree of the first flow valve 140 may be known by measuring the amount of the first fluid between the rotor branch pipe 133 and the stator branch pipe 132 and comparing the change in the amount of the first fluid between the rotor branch pipe 133 and the stator branch pipe 132 when the rotor assembly is stationary, for example, when the battery of the vehicle 10 is charged. The opening degree of the first flow valve 140 may be obtained by directly obtaining a valve element angle signal of the first flow valve 140, where a larger valve element angle indicates a larger flow area of the first flow valve 140, for example, when the first flow valve 140 is mounted on the rotor branch pipe 133, a larger valve element angle of the first flow valve 140 indicates a larger opening degree of the first flow valve 140, and when the first flow valve 140 is mounted on the stator branch pipe 132, a larger valve element angle of the first flow valve 140 indicates a smaller opening degree of the first flow valve 140.
The first flow valve 140 may be a ball valve. When the first flow valve 140 is a ball valve, the valve core is provided with a through hole penetrating through the valve core, when the valve core angle is 0, the through hole is not communicated with the rotor branch oil pipe 133 or the stator branch oil pipe 132, the flow area is 0, and as the valve core rotates, the degree of communication between the through hole and the rotor branch oil pipe 133 or the stator branch oil pipe 132 is larger, the flow area is gradually increased, and when the valve core rotation angle is 90 degrees, the through hole is completely communicated with the rotor branch oil pipe 133 or the stator branch oil pipe 132, and the flow area is 100%.
When the rotor assembly is in a rotating state, because the rotor assembly has the negative pressure suction effect, at this time, the oil flow entering the rotor branch oil pipe 133 is not only controlled by the opening degree of the first flow valve 140, but also influenced by the negative pressure suction effect of the rotor assembly, so that the opening degree of the first flow valve 140 cannot be known by directly measuring the flow of the rotor branch oil pipe 133 when the rotor assembly is in the rotating state.
In some embodiments, the rotational speed of the rotor assembly is 20000RPM or greater.
The rotor assembly has a weak pumping action on the first fluid when the rotational speed of the rotor assembly is below 20000RPM, and has a strong pumping action on the first fluid when the rotational speed of the rotor assembly is above 20000 RPM.
According to the driving device provided by the embodiment of the application, through setting the rotating speed of the rotor assembly, when the rotating speed is more than or equal to 20000RPM, the negative pressure effect in the rotor assembly is enhanced due to the large rotating speed of the rotor assembly, and the adverse effect on the cooling of the stator is increased, so that the first flow valve 140 needs to be controlled to control the flow of the stator branch oil pipe 132, the stator assembly is fully cooled, and the over-temperature probability is reduced.
In some embodiments, the rotor assembly is capable of operating at a first rotational speed and a second rotational speed, the second rotational speed being greater than the first rotational speed, the first flow valve 140 having a first opening and the rotor branch conduit 133 having a first flow when the rotor assembly is at the first rotational speed, the first flow valve 140 having a second opening and the rotor branch conduit 133 having a second flow when the rotor assembly is at the second rotational speed, the first opening being greater than the second opening and the second flow being greater than the first flow.
And when the rotor assembly is at the second rotating speed, the wind friction loss is obvious due to the higher rotating speed, the heating value is increased, and the cooling requirement is improved. The negative pressure in the rotor increases due to the increase of the rotation speed, and at this time, the flow in the rotor branch pipe 133 is composed of the flow distributed by the first flow valve 140 and the flow sucked by the negative pressure. At this time, the cooling demand flow rate is increased by a part compared with the first rotation speed, but the negative pressure suction flow rate is significantly increased as the negative pressure effect starts to appear, and the flow rate dispensed by the first flow valve 140 is smaller than the flow rate dispensed at the first rotation speed, so that the flow rate actually entering the rotor branch oil pipe 133 is not excessively increased, but the flow rate entering the stator branch oil pipe 132 is reduced.
It can be understood that, when the rotor assembly is at the first rotation speed, the flow actually entering the rotor branch oil pipe 133 is the first flow, and when the rotor assembly is at the second rotation speed, the flow actually entering the rotor branch oil pipe 133 is the second flow, and because the first rotation speed is greater than the second rotation speed, the heating value of the motor at the second rotation speed is greater than the heating value of the motor at the first rotation speed, so that the rotor assembly can be effectively cooled by the arrangement that the second flow is greater than the first flow, and the stator assembly can be better cooled.
It can be further understood that, when the rotor assembly is at the first rotation speed, the above flow distribution by the first flow valve 140 is realized at the first opening by the first flow valve 140, and when the rotor assembly is at the second rotation speed, the above flow distribution by the first flow valve 140 is realized at the second opening by the first flow valve 140, and because the first rotation speed is greater than the second rotation speed, the heating value or the increase of the cooling requirement is relatively smaller at the second rotation speed, and the negative pressure suction increase of the rotor assembly is relatively larger at the second rotation speed, the flow in the rotor branch oil pipe 133 and the stator branch oil pipe 132 can be accurately distributed through the arrangement that the second opening is smaller than the first opening, thereby better ensuring the cooling of the stator assembly.
The "opening degree" refers to the degree of opening of the first flow valve 140, and describes the size of a passage through which the first flow valve 140 allows the first fluid to pass. The larger the opening degree, the more the first fluid flow rate is allowed by the first flow valve 140, and the smaller the opening degree, the less the first fluid flow rate is allowed by the first flow valve 140.
The larger the flow rate through which the first fluid is allowed by the first flow valve 140, the larger the opening degree of the first flow valve 140, whereas the smaller the flow rate through which the first fluid is allowed by the first flow valve 140, the smaller the opening degree of the first flow valve 140.
According to the driving device provided by the embodiment of the application, the first flow valve 140 is set to be at the first opening degree under the first rotating speed of the rotor assembly, and the first flow valve 140 is set to be at the second opening degree under the second rotating speed, so that the opening degree of the first flow valve 140 can be adjusted according to different rotating speeds of the rotor assembly, the flow rates of the first fluid in the rotor branch oil pipe 133 and the stator branch oil pipe 132 can be balanced, the probability of too much and too little flow rate of the first fluid in the stator branch oil pipe 132 can be reduced, and the thermal management capability of the driving device can be improved.
In some embodiments, the first rotational speed is greater than 0 and less than or equal to 20000RPM, and the second rotational speed is between 20000RPM and A, 23000RPM < A < 27000RPM.
20000RPM < second rotation speed is less than or equal to A.
The first rotational speed may include rotational speed values of 0RPM, 5000RPM, 10000RPM, 15000 RPM, etc.
In some embodiments, when A takes 23000RPM, the rotational speed of the rotor assembly is satisfied at an operating point of 20000RPM to 23000RPM, the second opening is less than the first opening, and the second flow is greater than the first flow.
In some embodiments, when A takes 27000RPM, the rotating speed of the rotor assembly is satisfied at an operating point of 20000RPM to 27000RPM, the second opening is smaller than the first opening, and the second flow is larger than the first flow.
According to the driving device provided by the embodiment of the application, the first flow valve 140 of the driving device is more convenient in the implementation process and is beneficial to use by setting specific values of the first rotating speed and the second rotating speed.
In some embodiments, the rotor assembly is capable of operating at a third rotational speed that is greater than the second rotational speed, and when the rotor assembly is at the third rotational speed, the opening of the first flow valve 140 is a third opening, the flow rate of the rotor branch pipe 133 is a third flow rate, the third flow rate is greater than the second flow rate, and the third opening is greater than the first opening.
When the rotation speed of the rotor assembly is at the third rotation speed, the cooling requirement of the rotor assembly is greatly increased, and the opening degree of the first flow valve 140 needs to be increased to meet the cooling requirement of the rotor assembly, and at this time, the third opening degree is greater than the first opening degree.
According to the driving device provided by the embodiment of the application, the negative pressure suction effect of the rotor assembly is obviously enhanced at the third rotating speed, and the first flow valve 140 is set to be at the third opening, so that when the rotating speed of the rotor assembly is high, the flow of the first fluid flowing into the stator branch oil pipe 132 is high, the heat exchange effect of the first fluid on the stator assembly is ensured, and the heat exchange reliability of the driving device is improved.
In some embodiments, the third rotational speed satisfies A or more. The third rotational speed > a.
Alternatively, A is 23000RPM or 27000RPM or any one of the rotational speed values 23000RPM to 27000 RPM.
For example, the third rotational speed is greater than 23000RPM when A is 23000RPM, greater than 25000RPM when A is 25000RPM, and greater than 27000RPM when A is 27000RPM.
According to the driving device provided by the embodiment of the application, the first flow valve 140 of the driving device is more convenient in the implementation process and is beneficial to use by setting the specific value of the third rotating speed, the heat exchange effect on the stator assembly is improved by adjusting the first flow valve 140, and meanwhile, the probability that excessive first fluid flows into the rotor branch oil pipe 133 is reduced.
In some embodiments, the first flow valve 140 is mounted to the rotor leg 133 and/or the stator leg 132.
According to the driving device provided by the embodiment of the application, through the arrangement of the first flow valve 140, the flow of the first fluid in the rotor branch oil pipe 133 can be accurately controlled, and the regulation and control efficiency of the first flow valve 140 on the flow of the first fluid in the stator branch oil pipe 132 by directly controlling the flow of the first fluid in the rotor branch oil pipe 133 is improved.
In some embodiments, the first flow valve 140 comprises a proportional solenoid valve.
According to the driving device provided by the embodiment of the application, through the arrangement that the first flow valve 140 comprises the proportional electromagnetic valve, the accurate control of the first flow valve 140 can be realized, the flow of the first fluid can be accurately controlled, and the controllability is high.
In some embodiments, the stator assembly includes a stator body and windings. The stator body 111 is the tube-shape, and the stator body 111 has a plurality of first runner A1, and the both ends of first runner A1 are located stator body 111 along axial X's both ends respectively, and stator oil pipe 132 communicates with first runner A1, and stator body 111 inner wall is equipped with a plurality of bulge A2 windings around locating bulge A2, and the winding is followed stator body 111 axial X and is bulged in stator body 111 setting.
The winding refers to a conductive coil for generating a magnetic field, and the assembly process of winding the winding on the protruding part A2 refers to winding the winding into a rectangular coil, and sleeving the rectangular coil on the protruding part A2 after shaping treatment.
The number of the first flow passages A1 includes two, three, or even more, and the number of the plurality of first flow passages A1 is set at intervals in the circumferential direction of the stator body 111, and can be adjusted according to practical situations. The extending direction of the first flow passage A1 includes extending along the axial direction X of the stator body 111, and may intersect the extending direction X of the axial direction of the stator body 111. Alternatively, the first flow channel A1 is embedded in the stator body 111.
The stator branch oil pipe and the first flow passage A1 can be directly connected or indirectly connected. The stator branch oil pipe is inserted in the first flow channel A1 to realize connection between the stator branch oil pipe and the first flow channel A1, and a flow guiding structure can be arranged between the stator branch oil pipe and the first flow channel A1 to realize connection between the stator branch oil pipe and the first flow channel A1.
According to the driving device provided by the embodiment of the application, through the arrangement of the first flow channel A1 and the connection of the first flow channel A1 and the stator branch oil pipe, the first fluid can be conveyed to the stator body 111, the cooling of the stator body 111 and the winding is realized, the probability of over-temperature of the stator assembly is reduced, secondly, the two ends of the first flow channel A1 are respectively arranged at the two ends of the stator body 111 along the axial direction X, the first flow channel A1 is embedded in the stator body 111, the contact area of the first fluid flowing into the first flow channel A1 and the stator body 111 can be increased, and the cooling efficiency of the stator assembly is improved.
In some embodiments, each first flow passage A1 extends along an axial direction X of the stator body 111.
The shape of the cross-section of the first flow channel A1 includes, but is not limited to, circular, square, or other shaped, etc.
According to the driving device provided by the embodiment of the application, through the arrangement that each first flow passage A1 extends along the axial direction X of the stator body 111, the uniformity of cooling the stator assembly can be improved, the manufacturing process can be simplified, and the processing is easy.
In some embodiments, the first sub path 1321 has one end communicating with one end of the first flow path A1, the second sub path 1322 has one end communicating with the other end of the first flow path A1, the connection sub path 1323 has a first port H1, a second port H2, and a third port H3, the first port H1 communicates with the oil inlet pipe 131, the second port H2 communicates with the other end of the first sub path 1321, and the third port H3 communicates with the other end of the second sub path 1322.
According to the driving device provided by the embodiment of the application, the arrangement of the first sub-path 1321, the second sub-path 1322 and the connecting sub-path 1323 improves the arrangement rationality of the stator branch oil pipe 132, not only can the function of the stator branch oil pipe 132 be ensured, but also the occupation of the stator branch oil pipe 132 to the driving device space can be reduced, and the driving device is reasonable in layout and compact in structure.
In some embodiments, the oil inlet pressure of the first sub-passage 1321 is not equal to the oil inlet pressure of the second sub-passage 1322.
The oil inlet pressure of the first sub-passage 1321 may be greater than or less than the oil inlet pressure of the second sub-passage 1322.
According to the driving device provided by the embodiment of the application, through the arrangement of the pressure difference, the first fluid can be promoted to flow in the interval corresponding to the first sub-path 1321 and the second sub-path 1322 in the first flow path A1, so that the oil is prevented from being trapped between the first sub-path 1321 and the second sub-path 1322, and the first flow path A1 is prevented from being locally retarded in oil or oil flow, so that the stator assembly is cooled poorly and is over-heated.
In some embodiments, the cross-sectional flow area of the second sub-passage 1322 is greater than the cross-sectional flow area of the first sub-passage 1321, the greater the cross-sectional flow area, the less the pressure of the first fluid flowing inside.
In some embodiments, the stator branch pipe 132 further includes a valve 1324, and the valve 1324 is installed at a portion of the second sub-path 1322 or the connection sub-path 1323 between the second port H2 and the third port H3 such that the oil inlet pressure of the second sub-path 1322 is less than the oil inlet pressure of the first sub-path 1321.
The valve 1324 includes, but is not limited to, a mechanical pressure valve, a hydraulic regulator valve, and the like.
According to the driving device provided by the embodiment of the application, through the arrangement of the valve 1324, the structure arrangement is simplified, a complicated process is not needed, and the cost can be reduced.
In some embodiments, the stator assembly further includes an end cap assembly 112, and the end cap assembly 112 is connected to one end of the stator body 111 along the axial direction X, the end cap assembly 112 has a chamber C1, and the stator branch oil pipes 132 are respectively communicated with the plurality of first flow passages A1 through the chamber C1.
The end cap assembly 112 may include one or two, alternatively, the number of end cap assemblies 112 may include two. Optionally, along the axial direction X of the stator body 111, the shape of the orthographic projection of the chamber C1 comprises a ring shape.
The first fluid inside the stator branch pipe 132 may flow into the chamber C1 of the end cap assembly 112, and then flow into the first flow path A1.
According to the driving device provided by the embodiment of the application, through the arrangement of the end cover assembly 112, at least one end part of the stator assembly is cooled, the cooling efficiency of the end part of the stator assembly is improved, in addition, the stator branch oil pipe 132 flows into the first flow channel A1 through the end cover assembly 112, so that the communication between the stator branch oil pipe 132 and the first flow channel A1 is realized conveniently, and the connecting structure between the stator branch oil pipe 132 and the first flow channel A1 is simplified.
In some embodiments, the end cap assembly 112 has a fluid inlet C2, the fluid inlet C2 being in communication with the chamber C1, and the stator branch tube 132 being in communication with the fluid inlet C2.
The shape and the number of the liquid inlet holes C2 can be adjusted according to actual conditions.
According to the driving device provided by the embodiment of the application, through the arrangement of the liquid inlet C2, the connection between the stator branch oil pipe 132 and the end cover component 1122 is realized.
In some embodiments, the end cap assembly 112 has a fluid outlet hole C3, the fluid outlet hole C3 being in communication with the chamber C1.
According to the driving device provided by the embodiment of the application, through the arrangement of the liquid outlet hole C3, the first fluid can flow out of the stator assembly, and the circulation of the first fluid is facilitated.
In some embodiments, the end cap assembly 112 is provided with a plurality of avoidance holes C4 on a side near the stator body 111, and at least part of the windings are inserted into the avoidance holes C4 and extend into the cavity C1.
According to the driving device provided by the embodiment of the application, through the arrangement of the avoidance holes C4, when the first fluid flows into the cavity C1, the winding is subjected to submerged cooling and lubrication, the contact area of the winding and the first fluid is increased, and meanwhile, the cooling and lubrication effects are more uniform.
In some embodiments, a sealing medium is filled between the windings and the end cap assembly 112.
According to the driving device provided by the embodiment of the application, the sealing medium is filled between the winding and the end cover assembly 112, so that the chamber C1 and the first flow channel A1 are in sealing connection, the first fluid entering the chamber C1 can be stored to sufficiently cool the winding positioned at the end part of the stator body 111, and the cooling effect of the winding is improved.
In some embodiments, end cap assembly 112 includes a cover 1121, a gasket 1122. The gasket 1122 is located between the cover portion 1121 and the stator body 111, the gasket 1122 and the cover portion 1121 enclose a chamber C1, the gasket 1122 is provided with a relief hole C4, the gasket 1122 is covered at one end of the stator body 111, and the first flow passage A1 is opened at an area of one end of the stator body 111 not covered by the gasket 1122.
According to the driving device provided by the embodiment of the application, the arrangement of the cover part 1121 and the gasket 1122 simplifies the production process of the end cover assembly 112, and the cover part 1121 and the gasket 1122 are simply assembled.
Referring to fig. 7, fig. 7 is a schematic perspective view of a second flow channel of the driving device shown in fig. 2.
In some embodiments, the rotor assembly includes a second flow passage 121, and the rotor leg tube 133 communicates with the second flow passage 121.
According to the driving device provided by the embodiment of the application, through the arrangement of the second flow channel 121, the rotor assembly can be cooled through the first fluid, so that the probability of high-temperature demagnetization of the rotor assembly is reduced.
In some embodiments, the rotor assembly includes a rotor shaft extending along an axial direction X of the stator assembly, and a rotating portion sleeved on the rotor shaft, and the second flow passage 121 includes a first sub-flow passage 1211, a second sub-flow passage 1212, and a third sub-flow passage 1213. The first sub-flow channel 1211 is arranged on the rotor shaft, the first sub-flow channel 1211 is communicated with the rotor branch oil pipe 133, the second sub-flow channel 1212 is arranged on the rotating part, the second sub-flow channel 1212 extends along the radial direction of the rotating part, the third sub-flow channel 1213 is arranged on the rotating part, the third sub-flow channel 1213 extends along the axial direction X, and the second sub-flow channel 1212 is communicated with the first sub-flow channel 1211 and the third sub-flow channel 1213.
According to the driving device provided by the embodiment of the application, through the arrangement that the second flow passage 121 comprises the first sub-flow passage 1211, the second sub-flow passage 1212 and the third sub-flow passage 1213, the first fluid can flow into the first sub-flow passage 1211 to cool the rotor shaft, can flow into the second sub-flow passage 1212 and the third sub-flow passage 1213 to cool the rotating part, can sufficiently cool each part of the rotor assembly, and improves the cooling effect on each position of the rotor assembly so as to fully cool the rotor assembly.
In some embodiments, the first sub-flow channel 1211 extends along the axial direction X, the first sub-flow channel 1211 having a first end and a second end, the number of second sub-flow channels 1212 being a plurality, a portion of the second sub-flow channels 1212 being connected to the first end, and another portion of the second sub-flow channels 1212 being connected to the second end.
In the driving device provided by the embodiment of the application, through the arrangement that part of the second sub-flow channel 1212 is connected with the first end and the other part of the second sub-flow channel 1212 is connected with the second end, the first fluid flows into the second sub-flow channel 1212 from the two ends of the first sub-flow channel 1211, and the probability that the first fluid flows into only one end of the first sub-flow channel 1211 to accumulate heat at the other end of the first sub-flow channel 1211 is reduced.
In some embodiments, the number of the third sub-flow channels 1213 is a plurality, the plurality of third sub-flow channels 1213 are correspondingly communicated with the plurality of second sub-flow channels 1212, each third sub-flow channel 1213 comprises a plurality of branch flow channels extending along the axial direction X, the plurality of branch flow channels are arranged at intervals along the circumferential direction of the rotor shaft, and each second sub-flow channel 1212 is communicated with the plurality of branch flow channels in the corresponding third sub-flow channel 1213.
According to the driving device provided by the embodiment of the application, through the arrangement of the plurality of branch flow passages, and the second sub-flow passages 1212 are communicated with the plurality of branch flow passages in the corresponding third sub-flow passage 1213, different sub-parts of the rotating part can be cooled, and the uniformity of cooling of the rotating part is improved.
In some embodiments, the third sub-flow channel 1213 has an oil slinger Q1 at an axial end of the rotating portion, and in a radial direction of the rotating portion, the oil slinger is disposed corresponding to the stator assembly to discharge oil toward the stator assembly.
The oil throwing port Q1 sprays oil to windings of the stator assembly to lubricate and cool the windings.
The number and the shape of the oil throwing ports Q1 can be adjusted according to actual conditions.
It should be noted that, as long as the oil sprayed from the oil throwing port Q1 can reach the windings of the stator assembly, the oil spraying and cooling of the stator windings are realized, and all the oil throwing ports Q1 and the stator assembly are correspondingly arranged.
According to the driving device provided by the embodiment of the application, through the arrangement of the oil throwing port Q1, the outflow of the first fluid in the second flow passage 121 can be realized, so that the circulating flow of the first fluid in the second flow passage 121 is realized, and the lubrication and cooling of the winding can be realized.
Referring to fig. 8, fig. 8 is a schematic perspective view of a third flow channel of the driving device shown in fig. 2.
In some embodiments, the driving device has a third flow channel 151, and the third flow channel 151 is used for heat exchange with the outer wall of the stator assembly.
According to the driving device provided by the embodiment of the application, the outer wall of the stator assembly can be cooled through the arrangement of the third flow channel 151, so that the heat dissipation efficiency of the outer wall of the stator assembly is improved, the working probability of the stator assembly in a controllable temperature range is improved, and the service life of the driving device can be further prolonged.
In some embodiments, the driving device further includes a housing assembly surrounding an outer wall of the stator, and a third flow channel 151 is formed inside the housing assembly.
According to the driving device provided by the embodiment of the application, the stator assembly can be protected through the arrangement of the shell assembly, the probability of mechanical damage of the stator assembly is reduced, the anti-seismic performance of the driving device can be improved, and the utilization rate of space can be improved by integrating the third flow channel 151 through the shell assembly.
In some embodiments, third flow channel 151 includes a first portion 1511, a second portion 1512. The first portion 1511 extends along an axial direction X of the stator assembly, the second portion 1512 includes a plurality of sub-portions extending along a circumferential direction of the stator and sequentially arranged along the axial direction X, each adjacent sub-portion is connected end to end, and one of the sub-portions located at two ends of the axial direction X is connected to the first portion 1511, so that the first portion 1511 and the second portion 1512 are communicated to form the third flow channel 151.
The width and length dimensions of the first portion 1511 may be adjusted according to practical situations. The number of sub-portions of the second portion 1512, the width dimension of each sub-portion, the radial dimension may be adjusted as is practical.
According to the driving device provided by the embodiment of the application, through the arrangement of the first part 1511 and the second part 1512, the structure is compact, so that a longer cooling path is realized by the third flow channel 151, the cooling effect is more uniform, and the space can be saved.
Referring to fig. 9 to 11, fig. 9 is a schematic perspective view showing a part of the structure of the feeding device according to an embodiment of the present application, fig. 10 is a schematic front view shown in fig. 9, and fig. 11 is a schematic top view shown in fig. 10. In some embodiments, the drive device further comprises a supply device 160. The supply device 160 is connected to the oil inlet pipe 131 of the oil path assembly 130, and the supply device 160 is capable of supplying the first fluid to the oil inlet pipe 131.
According to the driving device provided by the embodiment of the application, through the arrangement of the supply device 160, the first fluid is supplied to the oil inlet pipe 131 by utilizing the inside of the driving device, and an external connection supply piece is not needed, so that the integration effect of the driving device is improved.
In some embodiments, the supply device 160 includes a heat exchanger 161 for cooling the first fluid supplied to the oil inlet pipe 131.
The heat exchanger 161 includes but is not is limited to an air-cooled oil cooler water-cooled oil coolers, etc.
According to the driving device provided by the embodiment of the application, through the arrangement of the heat exchanger 161, heat exchange can be performed with the first fluid, so that the temperature of the first fluid flowing into the oil inlet pipe 131 is ensured to be within a preset range, and the cooling effect of the first fluid in the stator assembly and the rotor assembly is further ensured.
In some embodiments, the heat exchanger 161 comprises an oil inlet pipe 1611, an oil outlet pipe 1612 and a first connecting pipe 1613, wherein the first connecting pipe 1613 is connected between the oil inlet pipe 1611 and the oil outlet pipe 1612, and the first connecting pipe 1613 selectively communicates with the oil inlet pipe 1611 and the oil outlet pipe 1612.
The oil outlet pipe 1612 communicates with the oil inlet pipe 131.
If the first fluid is not required to be cooled, the oil inlet pipe 1611 is communicated with the oil outlet pipe 1612 through the first connecting pipe 1613, and if the first fluid is required to be cooled, the oil inlet pipe 1611 is disconnected from the oil outlet pipe 1612 through the first connecting pipe 1613, and the first fluid enters the heat exchanger 161 to be cooled.
According to the driving device provided by the embodiment of the application, through the arrangement that the heat exchanger 161 comprises the oil inlet pipe 1611, the oil outlet pipe 1612 and the first connecting pipe 1613, the oil inlet pipe 1611 and the oil outlet pipe 1612 can be selectively communicated, and when the temperature of the first fluid is higher, the communication of the oil inlet pipe 1611 and the oil outlet pipe 1612 can be controlled, so that the stator assembly and/or the rotor assembly can be effectively cooled. When the temperature of the first fluid is lower, the first fluid and the second fluid can be controlled to be disconnected, so that the first fluid can be insulated, and the probability that the viscosity of the first fluid is reduced due to the excessively low temperature to increase the stirring loss is reduced.
In some embodiments, the supply 160 further includes a first valve 162, the first valve 162 configured to selectively communicate a first connecting tube 1613 into the oil line 1611 and the oil line 1612.
According to the driving device provided by the embodiment of the application, the first connecting pipe 1613 is selectively communicated with the oil inlet pipe 1611 and the oil outlet pipe 1612 through the arrangement of the first valve 162, so that the steps are more convenient to realize.
In some embodiments, the supply device 160 further includes a first driving pump for driving the first fluid to supply the oil inlet pipe 131.
According to the driving device provided by the embodiment of the application, through the arrangement of the first driving pump, the flow of the first fluid is driven, and conditions are created for cooling.
In some embodiments, the heat exchanger 161 has cooling flow channels inside for circulating a cooling medium, the cooling flow channels being capable of exchanging heat with the first fluid to cool the first fluid.
According to the driving device provided by the embodiment of the application, through the arrangement of the cooling flow channel and the first fluid for heat exchange, the structure of the heat exchanger is simple, and the realization is easy.
In some embodiments, the driving device further comprises a housing assembly, the housing assembly is arranged around the outer wall of the stator assembly, a third flow channel 151 is formed inside the housing assembly, the supply device 160 further comprises a liquid inlet pipe 163, a first liquid outlet pipe 164, a second liquid outlet pipe 166 and a second valve 165, the liquid inlet pipe 163 is communicated with one end of the cooling flow channel, the other end of the cooling flow channel is selectively communicated with the first liquid outlet pipe 164 and the second liquid outlet pipe 166 through the second valve 165, the first liquid outlet pipe 164 is communicated with the third flow channel 151, and the second liquid outlet pipe 166 is suitable for being communicated with the water circulation system of the vehicle 10.
With the above arrangement, the cooling medium flowing out of the cooling flow passage can directly return to the water circulation system of the vehicle 10, or can enter the third flow passage 151 to exchange heat with the first fluid in the first flow passage, so as to cool the first fluid and also cool the stator body 111.
In some embodiments, the supply 160 further includes a second drive pump for driving the flow of cooling medium.
According to the driving device provided by the embodiment of the application, through the arrangement of the second driving pump, the cooling medium can be driven, so that the cooling medium can be circulated.
The embodiment of the application provides a driving assembly, which comprises any driving device.
According to the driving assembly provided by the embodiment of the application, through the arrangement of the driving device, the heat exchange process in the driving device can be controlled more efficiently, the heat exchange capacity of the driving assembly is improved, and the service life of the driving assembly is prolonged.
Embodiments of the present application provide a vehicle 10 including any of the above-described drive assemblies.
According to the vehicle 10 provided by the embodiment of the application, through the arrangement of the driving assembly, the driving assembly comprises the driving device, so that the stator assembly and the rotor assembly of the driving device can be cooled, and the running reliability of the vehicle 10 is improved.
The control method of the driving assembly provided by the embodiment of the application comprises the step of adjusting the opening degree of the first flow valve 140 when the rotating speed of the rotor assembly meets a first preset condition.
The embodiment of the application provides a control method of a driving assembly, by the arrangement, the opening degree of a first flow valve 140 can be adjusted under a first preset condition, so that the first flow valve 140 is controlled efficiently, the probability of increasing the flow of a first fluid flowing into a rotor assembly due to negative pressure generated by the higher rotating speed of the rotor assembly can be reduced, and the cooling effect of a stator assembly is improved.
In some embodiments, the first predetermined condition is that the rotational speed of the rotor assembly is greater than 10000RPM, or the first predetermined condition is that the rotational speed of the rotor assembly is greater than 20000RPM.
The embodiment of the application provides a control method of a driving assembly, by which the opening degree of the first flow valve 140 can be adjusted more accurately according to the state of the rotor assembly.
In some embodiments, if the rotational speed of the rotor assembly is greater than 0 and less than or equal to 20000RPM, the opening of the first flow valve 140 is controlled to be a first opening, the flow of the rotor branch oil pipe 133 is a first flow, if the rotational speed of the rotor assembly is greater than 20000RPM and less than or equal to A,23000RPM is less than or equal to A and less than or equal to 27000RPM, the opening of the first flow valve 140 is controlled to be a second opening, the flow of the rotor branch oil pipe 133 is a second flow, if the rotational speed of the rotor assembly is greater than A, the opening of the first flow valve 140 is controlled to be a third opening, the flow of the rotor branch oil pipe 133 is a third flow, the third opening is greater than the first opening, the first opening is greater than the second opening, the third flow is greater than the second flow, and the second flow is greater than the first flow.
The embodiment of the application provides a control method of a driving assembly, through the above arrangement, the opening of the first flow valve 140 is adjusted to control the flow of the rotor branch oil pipe 133 so as to adapt to the working requirements of the rotor assembly at different rotation speeds, and the above control strategy is beneficial to improving the efficiency and reliability of the driving device.
In some embodiments, the opening of the first flow valve 140 is adjusted when the temperature information of the stator assembly satisfies a second predetermined condition.
The embodiment of the application provides a control method of a driving assembly, which can improve the probability of safe and efficient operation of the driving device and is beneficial to improving the adaptability and reliability of the driving device by monitoring the temperature and dynamically adjusting the opening of a first flow valve 140 according to a second preset condition through the flow control strategy based on the temperature of a stator assembly.
The foregoing is merely illustrative embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the technical scope of the present invention, and the invention should be covered. Therefore, the protection scope of the invention is subject to the protection scope of the claims.