Disclosure of Invention
Therefore, the invention aims to overcome the defect of poor cooling and heat dissipation effects of the magnetic suspension bearing in the rotary machine in the prior art, thereby providing the magnetic suspension rotary machine.
In order to solve the above-described problems, the present invention provides a magnetic levitation rotary machine comprising:
The magnetic suspension bearing is positioned at one axial side of the motor stator and can support the rotor, a rotor air inlet runner is arranged in the rotor, a rotor air outlet runner is further arranged on the rotor, one end of the rotor air inlet runner can be communicated with external air inlet, the other end of the rotor air inlet runner is communicated with the rotor air outlet runner, and the rotor air outlet runner is positioned between the magnetic suspension bearing and the motor stator;
The magnetic suspension bearing comprises an axial stator I, an axial stator II and a thrust disc, wherein the thrust disc is arranged between the axial stator I and the axial stator II in the axial direction of the magnetic suspension bearing, a first thrust disc vent hole is formed in the thrust disc in a penetrating manner from one axial end face to the other axial end face of the thrust disc, the axial stator I comprises a radial outer side part I and a radial inner side part I, the radial outer side part I and the radial inner side part I are arranged at intervals in the radial direction of the axial stator I, a coil groove I is formed between the radial outer side part I and the radial inner side part I, and a coil I is arranged in the coil groove I;
The second axial stator comprises a second radial outer side part and a second radial inner side part,
One end of the first thrust disc vent hole, which is positioned on the other axial end face of the thrust disc, is positioned between the second radial inner side part of the second axial stator and the rotor, one end of the first thrust disc vent hole, which is positioned on the one axial end face of the thrust disc, is opposite to the first coil slot in the axial direction, and the first thrust disc vent hole is not opposite to the first axial stator in the magnetic pole position;
the rotor exhaust runner may be in communication with the first thrust runner vent aperture, the motor stator runner, and the motor rotor runner, respectively.
In some embodiments of the present invention, in some embodiments,
The first pressing plate is positioned between the first axial stator and the thrust disc, one axial end face of the first pressing plate is connected with the first radial outer side part of the first axial stator, and the other axial end face of the first pressing plate is opposite to the thrust disc;
The magnetic pole position of the axial stator I comprises a part of the pressing plate I opposite to the thrust disc and a part of the radial inner side part I opposite to the thrust disc, a first gap is arranged between the pressing plate I and the radial inner side part I, the first thrust disc ventilation hole is opposite to the first gap in the axial direction, and the radial dimension of the first gap is larger than or equal to the radial dimension of one end of the first thrust disc ventilation hole opposite to the coil groove I.
In some embodiments of the present invention, in some embodiments,
In any radial section of the thrust disc, the magnetic circuit flow position sectional area of the first axial stator=the radial sectional area of the part of the thrust disc opposite to the first axial stator, namely the vent hole sectional area of the first thrust disc is larger than or equal to the magnetic pole position sectional area of the first axial stator.
In some embodiments of the present invention, in some embodiments,
A second gap is formed between the radial inner side of the first coil and the radial inner side of the first coil groove to form a first gas flow path,
The axial stator I further comprises an axial outer side part I which is arranged far away from the thrust disc relative to the coil I in the axial direction of the magnetic suspension bearing, and a third gap is formed between the axial outer side part I and the coil I in the coil groove I to form a bearing stator ventilation groove I;
a first bearing stator vent hole is formed in the first axial outer side portion of the first axial stator, and penetrates from the first axial end face of the first axial outer side portion to the other axial end face of the first bearing stator vent hole so as to be communicated with the first bearing stator vent groove, and is further communicated to the first thrust disc vent hole through the first gas flow path;
the rotor exhaust runner communicates with the bearing stator vent I through the first thrust disc vent.
In some embodiments of the present invention, in some embodiments,
Along the axial direction of the thrust disc, the first thrust disc vent hole is of an inclined hole structure with the extending direction not parallel to the axis of the thrust disc, the direction of rotation of the thrust disc is in a first rotating direction from the air inlet side axial end face of the thrust disc to the air outlet side axial end face, the extending direction of the first thrust disc vent hole from the air inlet side axial end face of the thrust disc to the air outlet side axial end face is in a second rotating direction, and the second rotating direction is opposite to the first rotating direction.
In some embodiments of the present invention, in some embodiments,
The plurality of first thrust disk vent holes are arranged at intervals along the circumferential direction of the thrust disk, and the extending direction of each first thrust disk vent hole from the axial end face of the air inlet side of the thrust disk to the axial end face of the air outlet side of the thrust disk faces the second rotating direction, and the extending direction is opposite to the first rotating direction of the thrust disk.
In some embodiments of the present invention, in some embodiments,
A second thrust disc vent hole is formed in the thrust disc in a penetrating manner from the axial other end face to the axial one end face of the thrust disc, and the second thrust disc vent hole is staggered with and not communicated with the first thrust disc vent hole;
The second radial outer side part and the second radial inner side part are arranged at intervals in the radial direction of the second axial stator, a second coil groove is formed between the second radial outer side part and the second radial inner side part, a second coil is arranged in the second coil groove, one end, located on one axial end face of the second thrust disk vent hole, of the second thrust disk vent hole is located between the first radial inner side part of the first axial stator and the rotor, one end, located on the other axial end face of the second thrust disk vent hole, of the second thrust disk vent hole is opposite to the second coil groove in the axial direction, and the second thrust disk vent hole is not opposite to the magnetic pole of the second axial stator;
the rotor exhaust runner is also in communication with the second thrust disc vent aperture.
In some embodiments of the present invention, in some embodiments,
The second pressing plate is positioned between the second axial stator and the thrust disc, one axial end face of the second pressing plate is connected with the second radial outer side part of the second axial stator, and the other axial end face of the second pressing plate is opposite to the thrust disc;
The magnetic pole position of the second axial stator comprises a part of the second pressing plate opposite to the thrust disc and a part of the second radial inner side part opposite to the thrust disc, a fourth gap is arranged between the second pressing plate and the second radial inner side part, the second thrust disc vent hole and the fourth gap are opposite in the axial direction, and the radial dimension of the fourth gap is larger than or equal to the radial dimension of one end of the second thrust disc vent hole opposite to the second coil slot.
In some embodiments of the present invention, in some embodiments,
In each radial section of the thrust disc, the magnetic circuit flow position sectional area of the second axial stator=the radial sectional area of the two opposite parts of the thrust disc and the axial stator, namely the vent hole sectional area of the second thrust disc is larger than or equal to the magnetic pole position sectional area of the second axial stator.
In some embodiments of the present invention, in some embodiments,
A fifth gap is formed between the radial inner side of the second coil and the second radial inner side part in the second coil groove to form a second gas flow path,
The second axial stator further comprises a second axial outer side part which is arranged far away from the thrust disc relative to the second coil in the axial direction of the magnetic suspension bearing, and a sixth gap is formed between the second axial outer side part and the second coil in the second coil groove to form a second bearing stator ventilation groove;
A second bearing stator vent hole is formed in the second axial outer side part of the second axial stator, and penetrates from the first axial end surface of the second axial outer side part to the other axial end surface so as to be communicated with the second bearing stator vent groove and further communicated to the second thrust disc vent hole through the second gas circulation path;
the rotor exhaust runner is communicated with the second thrust disc vent hole through the bearing stator vent hole II.
In some embodiments of the present invention, in some embodiments,
Along the axial direction of the thrust disc, the second thrust disc vent hole is of an inclined hole structure with the extending direction not parallel to the axis of the thrust disc, the observing direction from the air inlet side axial end face of the thrust disc to the air outlet side axial end face of the thrust disc, the rotating direction of the thrust disc is in a third rotating direction, the extending direction from the air inlet side axial end face of the thrust disc to the air outlet side axial end face of the second thrust disc vent hole is in a fourth rotating direction, and the fourth rotating direction is opposite to the third rotating direction.
In some embodiments of the present invention, in some embodiments,
The second thrust disk ventilation holes are arranged at intervals along the circumferential direction of the thrust disk, and the extending direction of each second thrust disk ventilation hole from the axial end face of the air inlet side of the thrust disk to the axial end face of the air outlet side is towards the fourth rotating direction and is opposite to the third rotating direction of the thrust disk.
In some embodiments of the present invention, in some embodiments,
The magnetic suspension motor comprises a motor stator, a rotor air inlet channel, a magnetic suspension bearing and a magnetic suspension bearing, wherein the rotor air inlet channel is formed in the rotor along the axial direction at one axial end of the rotor;
The rear end cover is arranged at one axial end of the cylinder body, the rear shell is positioned in the cylinder body and connected with the rear end cover, and the rear radial bearing is positioned in the cylinder body;
The inner peripheral wall and the outer peripheral wall of the cylinder body are penetratingly provided with a motor air outlet, the motor air outlet is positioned between the motor stator and the rear radial bearing in the axial direction, and the motor stator runner and the motor rotor runner are respectively communicated with the motor air outlet.
In some embodiments of the present invention, in some embodiments,
The motor rotor comprises a motor stator, and is characterized by further comprising a front radial bearing, a front shell and a front end cover, wherein the front radial bearing and the front shell are both positioned on one side of the magnetic suspension bearing, which is far away from the axial direction of the motor stator, a front radial bearing runner is arranged between the front radial bearing and the periphery of the rotor, a front shell runner is arranged between the front shell and the periphery of the rotor, the front end cover is arranged on one side of the cylinder, which is far away from the axial direction of the rear end cover, and an accommodating space is formed between the front end cover and the front shell at intervals;
The inner peripheral wall and the outer peripheral wall of the cylinder body are also provided with bearing air outlets in a penetrating manner, the bearing air outlets are opposite to and communicated with the accommodating space, and the air passage of the magnetic suspension bearing, the front radial bearing runner, the front shell runner, the accommodating space and the bearing air outlets are sequentially communicated.
The magnetic suspension rotary machine provided by the invention has the following beneficial effects:
1. According to the invention, through the first and/or second thrust disc ventilation holes formed in the thrust disc, self active air suction heat exchange is realized through high rotation speed, the introduced gas flow is increased, the thrust disc is accelerated to cool, the cooling flow is increased to accelerate the heat dissipation of the axial coil, the cooling and heat dissipation effects of the magnetic suspension bearing are improved, one end of the first thrust disc ventilation hole opposite to the first coil groove is not opposite to the magnetic pole position of the first axial stator (one end of the second thrust disc ventilation hole is not opposite to the magnetic pole position of the second axial stator), the end face of the thrust disc is not perforated at the position opposite to the magnetic pole position, the cooling air can not directly reach the magnetic pole gap position, the influence of cooling gas and an opening on the magnetic furnace structure can be effectively avoided, so that the shortage of the magnetic suspension axial bearing force is avoided, the influence on the magnetic suspension magnetic circuit can be avoided while the improvement and the heat dissipation cooling of the magnetic suspension bearing are realized, the influence of the magnetic suspension force on the axial force can be effectively reduced; the invention also preferably extends from one end of the thrust disc, which is positioned between the axial stator and the rotor, to the other end of the thrust disc, which is opposite to the first coil slot, so that the coil in the stator can be cooled and radiated, the aperture size of one end, which is opposite to the first coil slot, is smaller than or equal to the radial distance between the upper magnetic pole and the lower magnetic pole of the axial stator, the position of the magnetic pole can be further effectively avoided, the influence on a magnetic circuit is further avoided, the ventilation paths of the two ends of the thrust disc are communicated with each other without shielding, the airflow resistance of the two ends of the thrust disc is small, and the circulation is good;
The invention also provides a motor stator runner, and a motor rotor runner is arranged on the rotor, so that cooling gas at the air inlet can enter the cylinder from the inside of the rotor, and then the cooling gas is divided into three paths, one path cools the rotor from the motor rotor runner, the second path cools the stator from the motor stator runner, and the cooling gas is discharged at a motor exhaust port of a rear cavity of the motor stator after being combined; the third path passes through the magnetic suspension axial bearing (the inclined hole of the thrust disc and the ventilation hole of the stator of the axial bearing) and the front radial bearing, and is discharged from the bearing air outlet of the cylinder body after passing through the front shell, so that the airflow flow area of the magnetic suspension bearing, the motor stator and the motor rotor is increased, and the cooling heat dissipation efficiency and the cooling heat dissipation performance of the magnetic suspension machine are further improved.
2. The invention further provides a relationship that the magnetic circuit flowing through position sectional area of the first axial stator=the radial sectional area of the part of the thrust disc opposite to the first axial stator-the vent sectional area of the first thrust disc is larger than or equal to the magnetic pole position sectional area of the first axial stator, so that other magnetic circuit parts, which are different from the magnetic pole positions, on the thrust disc cannot be saturated before the magnetic pole positions, thereby ensuring the formation of a normal magnetic flux loop and the continuous and effective provision of magnetic suspension supporting force; according to the invention, the vent holes of the thrust disc are arranged to face the second rotation direction along the extending direction from one axial end face to the other axial end face, and the second rotation direction is opposite to the first rotation direction (the rotation direction of the thrust disc), so that when the rotor drives the thrust disc to rotate at a high speed, negative pressure is generated to suck out one end of hot air and discharge the hot air to the outside, the flow of the introduced air is increased, the active ventilation and heat exchange of the thrust disc is realized, the air flow is accelerated, the energy consumption is saved, the heat dissipation performance is improved, and meanwhile, the energy efficiency is also improved; meanwhile, the bearing stator vent holes and the ventilation grooves (a plurality of gas circulation paths) are formed in the axial stator coil grooves in a matched mode, so that the gas flow of the cavity of the axial stator coil grooves can be further accelerated, and the effective independent heat dissipation of the axial coils and the thrust disc is realized.
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. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. 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.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of the present invention, and the azimuth terms "inside and outside" refer to inside and outside with respect to the outline of each component itself.
Spatially relative terms, such as "above," "upper" and "upper surface," "above" and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the process is carried out, the exemplary term "above" may be included. Upper and lower. Two orientations below. The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.
As shown in fig. 1 to 6, the present invention provides a magnetic levitation rotary machine including:
The magnetic suspension bearing, the motor stator 15 and the rotor 6, wherein the motor stator is positioned at the radial periphery of a part of the shaft section of the rotor 6, a motor stator runner 230 is axially arranged on the motor stator, a rotor air gap exists at the part of the rotor 6 opposite to the motor stator to form a motor rotor runner 240 (namely, a motor rotor runner is formed between the rotor and the stator), and both the motor stator runner 230 and the motor rotor runner 240 can circulate gas; the magnetic suspension bearing is positioned at one axial side of the motor stator and can support the rotor 6, a rotor air inlet runner 210 is arranged in the rotor 6, a rotor air outlet runner 220 is also arranged on the rotor 6, one end of the rotor air inlet runner 210 can be communicated with external air inlet, the other end of the rotor air inlet runner is communicated with the rotor air outlet runner 220, and the rotor air outlet runner 220 is positioned between the magnetic suspension bearing and the motor stator 15;
The magnetic suspension bearing comprises an axial stator I1, an axial stator II 2 and a thrust disc 3, wherein the thrust disc 3 is arranged between the axial stator I1 and the axial stator II 2 in the axial direction of the magnetic suspension bearing, a first thrust disc ventilation hole 01 is arranged on the thrust disc 3 from one axial end face to the other axial end face of the thrust disc in a penetrating way, the axial stator I1 comprises a radial outer side part I11 and a radial inner side part I12, the radial outer side part I11 and the radial inner side part I12 are arranged at intervals in the radial direction of the axial stator I1, a coil groove I13 is formed between the radial outer side part I11 and the radial inner side part I12, a coil I5 is arranged in the coil groove I13, the axial stator II 2 comprises a radial outer side part II 21 and a radial inner side part II 22,
One end of the first thrust disk vent hole 01 located on the axial other end face of the thrust disk 3 is located between the radially inner portion two 22 of the axial stator two 2 and the rotor 6, one end of the first thrust disk vent hole 01 located on the axial one end face of the thrust disk 3 is opposite to the position of the coil slot one 13 in the axial direction, and the first thrust disk vent hole 01 is not opposite to the magnetic pole position of the axial stator one 1;
the rotor exhaust runner 220 can be in communication with the first thrust disk vent 01, the motor stator runner 230, and the motor rotor runner 240, respectively.
According to the invention, the first thrust disc ventilation hole is formed in the thrust disc, the self active air suction heat exchange is realized through high rotation speed, the introduced gas flow is increased, the axial magnetic bearing is accelerated to cool, the thrust disc can be actively cooled, the cooling flow is increased, the axial coil heat dissipation is accelerated, the cooling heat dissipation effect on the magnetic suspension bearing is improved, one end of the first thrust disc ventilation hole opposite to the first coil groove is not opposite to the magnetic pole position of the first axial stator, the end face of the thrust disc is not perforated at the position opposite to the magnetic pole position, cooling air cannot directly reach the magnetic pole gap position, the influence of cooling gas and the open hole on the magnetic furnace structure is effectively avoided, the defect of insufficient magnetic suspension axial bearing force is avoided, the influence on a magnetic suspension magnetic circuit is avoided while the improvement of heat dissipation cooling on the magnetic suspension bearing is realized, the sufficient magnetic suspension supporting force is ensured, and the influence of gas acting force on the axial force is effectively reduced;
The invention also provides a motor stator runner, and a motor rotor runner is arranged on the rotor, so that cooling gas at the air inlet can enter the cylinder from the inside of the rotor, and then the cooling gas is divided into three paths, one path cools the rotor from the motor rotor runner, the second path cools the stator from the motor stator runner, and the cooling gas is discharged at a motor exhaust port of a rear cavity of the motor stator after being combined; the third path passes through the magnetic suspension axial bearing (the inclined hole of the thrust disc and the ventilation hole of the stator of the axial bearing) and the front radial bearing, and is discharged from the bearing air outlet of the cylinder body after passing through the front shell, so that the airflow flow area of the magnetic suspension bearing, the motor stator and the motor rotor is increased, and the cooling heat dissipation efficiency and the cooling heat dissipation performance of the magnetic suspension machine are further improved.
In some embodiments of the present invention, in some embodiments,
The device further comprises a pressing plate I4, wherein the pressing plate I4 is positioned between the axial stator I1 and the thrust disc 3, one axial end surface of the pressing plate I4 is connected with the radial outer side part I11 of the axial stator I1, and the other axial end surface of the pressing plate I4 is opposite to the thrust disc 3;
The magnetic pole position of the axial stator 1 includes a portion of the pressure plate 4 opposite to the thrust disk 3 and a portion of the radially inner portion 12 opposite to the thrust disk 3, a first gap 05 is provided between the pressure plate 4 and the radially inner portion 12, the first thrust disk vent hole 01 is opposite to the first gap 05 in the axial direction, and a radial dimension of the first gap 05 in the radial direction is equal to or greater than a radial dimension of an end of the first thrust disk vent hole 01 opposite to the coil groove 13.
According to the invention, the first thrust disk vent hole extends from one end of the thrust disk, which is positioned between the axial stator and the rotor, to the other end of the thrust disk, which is opposite to the first coil slot, so that cooling and heat dissipation can be carried out on the coil inside the stator, and the opposite end of the first thrust disk vent hole and the first coil slot is also preferably arranged at the position, which is right opposite to the coil, between the upper magnetic pole and the lower magnetic pole of the axial stator, so that the aperture size is smaller than or equal to the radial distance between the upper magnetic pole and the lower magnetic pole of the axial stator, the first thrust disk vent hole can further effectively avoid the magnetic pole position, the influence on a magnetic circuit is further avoided, the first thrust disk vent hole is communicated with ventilation paths at two ends, and the air flow resistance at two ends of the thrust disk is small, and the circulation performance is good.
In some embodiments of the present invention, in some embodiments,
In any radial section of the thrust disc 3, the magnetic circuit flow position sectional area of the axial stator 1=the radial sectional area of the part of the thrust disc opposite to the axial stator 1, namely the first thrust disc vent 01 sectional area is larger than or equal to the magnetic pole position sectional area of the axial stator 1.
The invention further provides a relationship that the magnetic circuit flowing through position sectional area of the first axial stator=the radial sectional area of the part of the thrust disc opposite to the first axial stator, and the vent sectional area of the first thrust disc is larger than or equal to the magnetic pole position sectional area of the first axial stator, so that other magnetic circuit parts, which are different from the magnetic pole positions, on the thrust disc cannot be saturated before the magnetic pole positions, thereby ensuring the formation of a normal magnetic flux loop and the continuous and effective provision of magnetic suspension supporting force.
In some embodiments of the present invention, in some embodiments,
A second gap is provided between the radially inner side of the coil first 5 and the radially inner side first 12 inside the coil groove first 13, a first gas flow path 06 is formed,
The axial stator 1 further comprises an axial outer side 14, the axial outer side 14 is arranged far away from the thrust disc 3 relative to the coil 5 in the axial direction of the magnetic suspension bearing, and a third gap is formed between the axial outer side 14 and the coil 5 in the interior of the coil slot 13 to form a bearing stator ventilation slot 04;
A first bearing stator vent hole 03 is formed in the first axial outer side portion 14 of the first axial stator 1, and the first bearing stator vent hole 03 penetrates from one axial end surface to the other axial end surface of the first axial outer side portion 14 so as to be communicated with the first bearing stator vent groove 04, and is further communicated to the first thrust disc vent hole 01 through the first gas flow path 06;
the rotor exhaust runner 220 communicates with the bearing stator vent one 03 through the first thrust disc vent 01.
The invention further enables the rotor exhaust channel to be communicated to the first bearing stator vent hole through the first thrust disc vent hole through the bearing stator vent hole and the vent grooves (a plurality of gas flow paths) arranged in the axial stator coil grooves, so that the effective cooling and heat dissipation of the inside of the bearing are realized, the air flow of the cavity of the axial stator coil grooves can be further accelerated, and the effective independent heat dissipation of the axial coil and the thrust disc is realized.
In some embodiments of the present invention, in some embodiments,
Along the axial direction of the thrust disc 3, the first thrust disc vent hole 01 is of an inclined hole structure whose extending direction is not parallel to the axis of the thrust disc 3, the viewing direction from the air inlet side axial end face of the thrust disc 3 toward the air outlet side axial end face thereof, the rotating direction of the thrust disc 3 is toward the first rotating direction, the extending direction of the first thrust disc vent hole 01 from the air inlet side axial end face of the thrust disc toward the air outlet side axial end face is toward the second rotating direction, and the second rotating direction is opposite to the first rotating direction.
According to the invention, the first thrust plate ventilation hole is arranged to face the second rotation direction from the axial end face on the air inlet side to the axial end face on the air outlet side, and the second rotation direction is opposite to the first rotation direction (the rotation direction of the thrust plate), so that one end of hot air can be sucked out and discharged to the outside through negative pressure generated when the rotor drives the thrust plate to rotate at a high speed, the flow rate of the introduced air is increased, the active ventilation and heat exchange of the thrust plate is realized, the air flow is accelerated, the energy consumption is saved, the heat dissipation performance is improved, and the energy efficiency is also improved.
In some embodiments of the present invention, in some embodiments,
The plurality of first thrust disk vent holes 01 are arranged at intervals along the circumferential direction of the thrust disk 3, and the extending direction of each first thrust disk vent hole 01 from the air inlet side axial end face to the air outlet side axial end face is towards the second rotating direction, and is opposite to the first rotating direction of the thrust disk 3.
The invention provides a magnetic suspension rotary machine (preferably a blower) capable of actively and efficiently radiating, wherein a first thrust disk vent hole adopts an inclined hole scheme to realize self active air suction heat exchange through high rotating speed, the flow of the introduced air is increased, the axial magnetic bearing is accelerated to be driven to cool, meanwhile, the whole active pure air cooling and radiating of the blower are matched, the coaxial impeller cooling or rotor rotation negative pressure cooling or main impeller leakage cooling at the other end of a main impeller are utilized, the external passive heat radiation is changed into the internal active heat radiation, and the heat radiation cost is reduced while the heat radiation efficiency is improved. The cooling scheme of the blower can effectively ventilate and dissipate heat for a motor stator, a motor rotor, a magnetic bearing and the like, and can better dissipate heat for an axial magnetic bearing at the same time, so that the stability of a magnetic suspension system is improved.
In some embodiments of the present invention, in some embodiments,
A second thrust disc vent hole 02 is formed in the thrust disc 3 in a penetrating manner from the other axial end face to one axial end face, and the second thrust disc vent hole 02 is staggered with and is not communicated with the first thrust disc vent hole 01;
The second radial outer side part 21 and the second radial inner side part 22 are arranged at intervals in the radial direction of the second axial stator 2, a second coil groove 23 is formed between the second radial outer side part 21 and the second radial inner side part 22, a second coil 5' is arranged in the second coil groove 23, one end of the second thrust disc vent hole 02 positioned on one axial end face of the first thrust disc 3 is positioned between the first radial inner side part 12 of the first axial stator 1 and the rotor 6, one end of the second thrust disc vent hole 02 positioned on the other axial end face of the first thrust disc 3 is opposite to the second coil groove 23 in the axial direction, and the second thrust disc vent hole 02 is not opposite to the magnetic pole position of the second axial stator 2;
the rotor exhaust runner 220 is also in communication with the second thrust disk vent 02.
According to the invention, the end surface of the thrust disc, which is opposite to the second coil slot, is not opposite to the magnetic pole position of the second axial stator, so that the end surface of the thrust disc is not perforated at the position, which is opposite to the magnetic pole position of the second axial stator, and cooling air cannot directly reach the magnetic pole gap position of the second axial stator, so that the influence of cooling gas and open holes on the magnetic furnace structure can be further effectively avoided, the defect of insufficient magnetic suspension axial supporting force is further avoided, the effect on the magnetic suspension magnetic circuit is further avoided while the heat dissipation and cooling of the magnetic suspension bearing are further realized, the magnetic suspension supporting force is further improved, and the influence of gas acting force on the axial force is also effectively reduced;
The first and second bearing stator vent holes and the first and second thrust disc vent holes are respectively communicated with the motor rotor runner, so that two paths (X-shaped heat exchange runner) of air circulation channels for radiating the magnetic suspension bearing can be provided, and the cooling and radiating efficiency of the magnetic suspension bearing is further improved.
In some embodiments of the present invention, in some embodiments,
The device further comprises a second pressing plate 4', wherein the second pressing plate 4' is positioned between the second axial stator 2 and the thrust disc 3, one axial end surface of the second pressing plate 4 'is connected with the second radial outer side part 21 of the second axial stator 2, and the other axial end surface of the second pressing plate 4' is opposite to the thrust disc 3;
The magnetic pole position of the second axial stator 2 includes a portion of the second pressing plate 4 'opposite to the thrust disk 3 and a portion of the second radially inner portion 22 opposite to the thrust disk 3, a fourth gap 07 is provided between the second pressing plate 4' and the second radially inner portion 22, the second thrust disk vent hole 02 is opposite to the fourth gap 07 in the axial direction, and a radial dimension of the fourth gap 07 is equal to or greater than a radial dimension of one end of the second thrust disk vent hole 02 and the second coil groove 23.
The second thrust disk vent hole extends from one end of the thrust disk, which is positioned between the axial stator and the rotor, to the other end of the thrust disk, which is opposite to the first coil slot, so that the coil inside the stator can be cooled and radiated, the end of the second thrust disk vent hole, which is opposite to the second coil slot, is also preferably arranged at the position, which is right opposite to the coil, between the upper magnetic pole and the lower magnetic pole of the axial stator, the aperture size is smaller than or equal to the radial distance between the upper magnetic pole and the lower magnetic pole of the axial stator, the second thrust disk vent hole can further effectively avoid the magnetic pole position, the influence on a magnetic circuit is further avoided, the second thrust disk vent hole is communicated with ventilation paths at two ends, and the second thrust disk vent hole has small airflow resistance at two ends and good fluxion performance.
In some embodiments of the present invention, in some embodiments,
In each radial section of the thrust disc 3, the magnetic circuit flow position sectional area of the second axial stator 2=the radial sectional area of the part of the thrust disc opposite to the second axial stator 2-the second thrust disc vent 02 sectional area is larger than or equal to the magnetic pole position sectional area of the second axial stator 2.
The invention further provides that one end of the second thrust disk vent hole opposite to the coil groove II is arranged between the upper magnetic pole and the lower magnetic pole of the axial stator II and is opposite to the coil, so that the aperture size of the end of the second thrust disk vent hole is smaller than or equal to the radial distance between the upper magnetic pole and the lower magnetic pole of the axial stator II, the second thrust disk vent hole can further effectively avoid the magnetic pole position of the axial stator II, the influence on a magnetic circuit is further avoided, the second thrust disk vent hole is communicated with ventilation paths at two ends without shielding, and the air flow resistance at two ends of the thrust disk is small and the circulation is good.
In some embodiments of the present invention, in some embodiments,
A fifth gap is provided between the radially inner side of the second coil 5' and the second radially inner side 22 in the second coil groove 23, so that a second gas flow path 08 is formed,
The second axial stator 2 further includes a second axial outer portion 24, the second axial outer portion 24 is disposed away from the thrust disc 3 in the axial direction of the magnetic suspension bearing relative to the second coil 5', and a sixth gap is formed between the second axial outer portion 24 and the second coil 5' inside the second coil slot 23 to form a second bearing stator ventilation slot 04';
a second bearing stator vent hole 03' is formed in the second axial outer side portion 24 of the second axial stator 2, and the second bearing stator vent hole 03' penetrates from one axial end surface to the other axial end surface of the second axial outer side portion 24 to communicate with the second bearing stator vent groove 04', and further communicates with the second thrust disc vent hole 02 through the second gas flow path 08;
The rotor exhaust runner 220 communicates with the second thrust disk vent hole 02 through the bearing stator vent hole two 03'.
The invention further provides a bearing stator vent hole and a vent groove (a plurality of gas flow paths) which are arranged in the coil groove of the second axial stator, so that the rotor exhaust channel is communicated to the second thrust disk vent hole through the second bearing stator vent hole, effective cooling and heat dissipation of the interior of the bearing are realized, and a gas flow channel for dissipating heat of the magnetic suspension bearing by two paths (X-shaped heat exchange flow channels) is formed, so that the gas flow of the coil groove cavity of the second axial stator can be further accelerated, and effective independent heat dissipation of the axial coil and the thrust disk is realized.
In some embodiments of the present invention, in some embodiments,
Along the axial direction of the thrust disc 3, the second thrust disc vent hole 02 has an inclined hole structure whose extending direction is not parallel to the axis of the thrust disc 3, the viewing direction from the air intake side axial end face of the thrust disc 3 toward the air exit side axial end face thereof, the rotating direction of the thrust disc 3 is toward the third rotating direction, the extending direction of the second thrust disc vent hole 02 from the air intake side axial end face of the thrust disc 3 toward the air exit side axial end face is toward the fourth rotating direction, and the fourth rotating direction is opposite to the third rotating direction.
According to the invention, the first thrust disc ventilation hole is arranged to extend from the axial end face on the air inlet side to the axial end face on the air outlet side in the third rotation direction (which can be the same as or opposite to the first rotation direction), and the fourth rotation direction is opposite to the third rotation direction (the rotation direction of the thrust disc), so that when the rotor drives the thrust disc to rotate at a high speed, negative pressure is generated to suck out one end of hot air to the outside, the flow of the introduced air is increased, the active ventilation and heat exchange of the thrust disc is realized, the air flow is accelerated, the energy consumption is saved, the heat dissipation performance is improved, and the energy efficiency is also improved.
In some embodiments of the present invention, in some embodiments,
The plurality of second thrust disk vent holes 02 are arranged at intervals along the circumferential direction of the thrust disk 3, and each of the second thrust disk vent holes 02 faces the fourth rotation direction from the air intake side axial end face of the thrust disk toward the air outlet side axial end face, and is opposite to the third rotation direction of the thrust disk 3.
The invention provides a magnetic suspension rotary machine (preferably a blower) capable of actively and efficiently radiating, wherein a second thrust disk vent hole adopts an inclined hole scheme to realize self active air suction heat exchange through high rotating speed, the flow of the introduced air is increased, the axial magnetic bearing is accelerated to be driven to cool, meanwhile, the whole active pure air cooling and radiating of the blower are matched, the coaxial impeller cooling or rotor rotation negative pressure cooling or main impeller leakage cooling at the other end of a main impeller are utilized, the external passive heat radiation is changed into the internal active heat radiation, and the heat radiation cost is reduced while the heat radiation efficiency is improved. The cooling scheme of the blower can effectively ventilate and dissipate heat for a motor stator, a motor rotor, a magnetic bearing and the like, and can better dissipate heat for an axial magnetic bearing at the same time, so that the stability of a magnetic suspension system is improved.
The axial magnetic bearing adopts active ventilation cooling, the thrust disc is arranged on the rotor, inclined holes are formed between two magnetic poles of the thrust disc, a plurality of staggered X-shaped inclined holes (only one air inlet inclined hole can be formed for axial cooling for cooling the thrust disc in a scheme of matching the whole machine) from inside to outside and from outside to inside in axial and radial spaces are formed on the thrust disc, the air inlet direction is opposite to the rotating direction of the rotor, negative pressure is generated when the rotor drives the thrust disc to rotate at a high speed to suck out one end of hot air into the outside, the flow of the introduced gas is increased, the active ventilation heat exchange of the thrust disc is realized, the gas flow is accelerated, and meanwhile, ventilation holes and ventilation grooves are formed in the axial stator coil grooves in a matching manner, the cavity gas flow of the axial stator coil grooves is accelerated, and the effective autonomous heat dissipation of the axial coil and the thrust disc is realized.
According to the axial magnetic suspension bearing principle, the relative position of the thrust disc and the axial magnetic pole is the output position, namely, the position of the end face of the thrust disc opposite to the magnetic pole can not be perforated, so that the defect of insufficient axial force is avoided, meanwhile, cooling air can not directly reach the position of the magnetic pole gap, and the influence of gas acting force on the axial force can be reduced. According to the axial magnetic circuit flow requirement, in order to ensure that the rest positions cannot be saturated by the magnetic field before the magnetic pole positions, the sectional area of the magnetic circuit flow position is larger than or equal to the sectional area of the magnetic pole positions in the radial circumferential direction. The thrust disc with inclined holes is provided with holes in the inner part of the magnetic circuit, the cross section area of the magnetic circuit in the radial direction is equal to the cross section area of the thrust disc in the same direction as the cross section area of the magnetic poles, the air inlet at the upper end of each inclined hole is positioned between the upper magnetic pole and the lower magnetic pole of the axial stator and is equal to or smaller than the radial distance between the upper magnetic pole and the lower magnetic pole of the axial stator, the air inlet at the lower end of each inclined hole is positioned at the non-magnetic conducting part of the inner ring of the lower magnetic pole of the axial stator, the aperture is smaller than the radial distance between the lower magnetic pole of the axial stator and the rotor, the two ends of the aperture are communicated with the ventilation path of the axial stator, the air flow resistance at the two ends of the thrust disc is small, the fluxion performance is good, and the axial force is not affected.
The whole system radiates heat and adopts an active pure air cooling radiating system, cold air utilizes the coaxial impeller drive at the other end of the main impeller or the rotor rotates to centrifugally intake or the main impeller leaks and intake, an additional radiating driving motor is not needed, the radiating cold air flow is regulated by the motor rotating speed, an additional controller is not needed, the whole internal flow channel is distributed, cold air is guided to each part of components to radiate heat in a targeted manner, the whole radiating system has a simple structure, and the radiating process is efficient and reliable.
In some embodiments of the present invention, in some embodiments,
The magnetic suspension motor further comprises a cylinder 19, a rear end cover 120, a rear shell 130 and a rear radial bearing 140, wherein one axial end of the rotor 6 is provided with a rotor air inlet channel 210 towards the inside of the rotor 6 along the axial direction, one end of the rotor air inlet channel 210 opposite to the rear end cover 120 is formed into an air inlet, and the magnetic suspension bearing and the motor stator are both positioned in the cylinder 19;
The rear end cover 120 is disposed at one axial end of the cylinder 19, the rear housing 130 is disposed inside the cylinder 19 and connected to the rear end cover 120, and the rear radial bearing 140 is disposed inside the cylinder 19;
The inner and outer peripheral walls of the cylinder 19 are penetratingly provided with a motor air outlet 26, the motor air outlet 26 is located between the motor stator 15 and the rear radial bearing 140 in the axial direction, and the motor stator runner 230 and the motor rotor runner 240 are respectively communicated with the motor air outlet 26.
The structure of the magnetic suspension rotary machine positioned on one axial side of the magnetic suspension bearing comprises a rear end cover, a rear shell and a rear radial bearing which are used for air inlet, and can suck air from an air inlet of the rotor air inlet channel into the rotor air outlet channel along with rotation, discharge the air into the cylinder body, and supply the air to the motor rotor channel, the motor stator channel and the air channel of the magnetic suspension bearing respectively, so that the air flow path is improved, the heat dissipation area of the magnetic suspension bearing, the motor stator and the rotor part is improved, and the cooling heat dissipation performance is improved.
In some embodiments of the present invention, in some embodiments,
The motor rotor comprises a motor stator, a rotor body 6 and a rotor body, and is characterized by further comprising a front radial bearing 17, a front shell 18 and a front end cover 20, wherein the front radial bearing 17 and the front shell 18 are positioned on one side of the magnetic suspension bearing, which is far away from the motor stator, in the axial direction, a front radial bearing runner is arranged between the front radial bearing 17 and the periphery of the rotor body 6, a front shell runner is arranged between the front shell 18 and the periphery of the rotor body 6, the front end cover 20 is arranged on one side of the cylinder body 19, which is far away from the rear end cover 120, and an accommodating space is formed between the front end cover 20 and the front shell 18;
The inner and outer peripheral walls of the cylinder 19 are also provided with bearing air outlets 25 in a penetrating manner, the bearing air outlets 25 are opposite to and communicated with the accommodating space, and the air passage of the magnetic suspension bearing, the front radial bearing runner, the front shell runner, the accommodating space and the bearing air outlets 25 are sequentially communicated.
The structure of the magnetic suspension rotary machine positioned on the other axial side of the magnetic suspension bearing comprises a front end cover, a front shell, a front radial bearing and the like, and can guide gas passing through two paths of cooling channels of the magnetic suspension bearing to exchange heat with the front radial bearing, and discharge the gas from a front shell flow channel, an accommodating space and a bearing air outlet to the outside of a cylinder body, so that the cooling and heat dissipation performance is improved, and the gas flow after heat dissipation of a stator through a motor stator flow channel and the gas flow after heat dissipation of a rotor through a motor rotor flow channel are converged and then discharged through a motor air outlet.
Fig. 6 shows a cooling flow path scheme of the magnetic suspension rotary machine, preferably a blower and the like, an active pure air cooling and radiating system is adopted, cold air is provided by rotor rotation and centrifugation, an additional heat radiation driving motor is not needed, a front radial bearing 17 is arranged at the front end, an axial bearing is arranged between the front radial bearing 17 and a motor stator 15, a rotor air inlet flow path 210 is arranged in the rear end of the rotor, the rotor air inlet flow path 210 passes through the rotor air inlet flow path 210 from back to front, then passes through a plurality of rotor air outlet flow paths 220 from the inside of the rotor to the outside and is arranged between the motor stator 15 and the axial bearing, a plurality of corresponding ventilation holes or ventilation grooves are formed in the barrel 19, the front shell 18, the axial bearing and other parts so as to facilitate air flow conduction, and cooling air generated by rotor rotation and centrifugation is divided into 3 paths by the rotor air outlet flow paths 220, wherein one path at the left end is discharged through a first bearing stator ventilation hole 03, a first bearing stator ventilation groove 04, a left inclined thrust disk hole (a first thrust disk ventilation hole 01), a second thrust disk ventilation hole 02), a second bearing stator ventilation groove 04', a second ventilation path 03' are discharged from the rotor air outlet 17 and discharged from the front bearing 25; the two paths at the right end are discharged through the rear radial bearing 140 by the motor stator runner 230 and the motor rotor runner 240, the runner structure is arranged, the heat-generating components such as the stator, the rotor, the radial bearing, the axial bearing and the like are independently and effectively cooled, meanwhile, the hot air is sucked out through the inclined hole runner by utilizing negative pressure for the thrust disc belt inclined holes of the high heat-generating components, the effective ventilation and cooling of the whole heat-generating components of the blower are realized, the whole heat dissipation system has simple structure, the heat dissipation process is efficient and reliable, the stability of the magnetic suspension system is improved.
The beneficial effects of the invention are as follows:
1. According to the invention, the inclined holes are arranged on the thrust disc and are matched with the axial coil ventilation grooves, heat is sucked out through the inclined hole flow channels by utilizing negative pressure, the thrust disc can be actively cooled, cooling flow is increased to accelerate the axial coil to dissipate heat, the active pure air cooling heat dissipation system reduces heat dissipation cost, and the heat-generating parts can be targeted ventilated to effectively accelerate cooling and improve reliability;
2. The invention also cooperates with the whole machine runner structure to arrange, the heat-generating components are ventilated and radiated in a targeted way, the effective ventilation and cooling of the whole heat-generating components of the blower are realized, the stability of the magnetic levitation system is improved, the integrated high-efficiency pure air cooling heat-radiating system is realized, the blower can be ensured to have enough heat-radiating air quantity under various working conditions, the cold air is directly driven by the motor rotor, the control logic is simple, and the reliability of the heat-radiating system is high.
The invention also provides a magnetic suspension rotary machine (preferably a rotary machine such as a motor, a blower, a ventilator or a compressor) which comprises the magnetic suspension bearing.
Fig. 1 and 3 show the internal axial bearing cooling paths of the magnetic suspension machine (preferably a blower) of the invention, bearing stator ventilation holes are arranged on the first/second axial stators, bearing stator ventilation grooves, preferably radial or annular or spiral ventilation grooves and the like are arranged in the coil grooves, a plurality of staggered X-shaped inclined holes (which can independently exist from inside to outside or from outside to inside or can also exist simultaneously) from inside to outside and from outside to inside in axial and radial spaces are arranged on the thrust disc 3, one opening of each inclined hole is opposite to the coil between the inner magnetic pole and the outer magnetic pole in the axial direction, and the corresponding slot ventilation position is not required, and the hole type is not required to be convenient for machining and process, and is preferably a round hole, a rectangular round hole or an oval hole. The second cooling path is discharged from the oblique hole of the thrust disc through the axial inner and outer magnetic poles of the axial stator, the axial coil inner ring, the axial stator ventilation slot and the axial stator ventilation hole (if the holes from inside to outside exist alone or the holes from outside to inside exist alone, only one path exists). During operation, the air inlet direction of the inclined hole of the thrust disc is opposite to the rotation direction of the rotor, the thrust disc sucks out heat dissipation gas by utilizing negative pressure, the gas flow is increased, the heat exchange between the thrust disc and the axial coil is accelerated, and the cooling path of the whole scheme is matched to achieve the effective heat dissipation effect. In order to make the thrust disk negative pressure air intake, the air intake direction needs to be opposite to the rotor rotation direction all the time, so the rotation direction of the inclined hole of the thrust disk is related to the air intake direction of the thrust disk and the rotor rotation direction, if the air intake rotor rotation direction at the left end of the thrust disk rotates clockwise from the right end, the thrust disk is a right-hand inclined hole, if the air intake rotor rotation direction at the left end of the thrust disk rotates anticlockwise from the right end, the thrust disk is a left-hand inclined hole, otherwise, the heat dissipation effect is weakened if the directions are not matched, and the heat dissipation efficiency is reduced.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention. The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present invention, and these modifications and variations should also be regarded as the scope of the invention.