Background technique
Damper technique is directly related to the comfortableness and security in vehicle travel process, and the vehicles of different purposes is to subtractingVibration device has different demands, and the damping control of damper is then the function of paying close attention in absorber designing and use process,Whether the function of damper, which reaches requirement, depends entirely on damping control ability.
Application number: 201821209280.7, patent name " a kind of support damping device and uses the support damping deviceVehicle " and application number: 201821229111.X, patent name " a kind of liquid gas support damping device and use this liquidThe vehicle of gas support damping device " two parts of patent files disclose and several are subtracted according to the control of the real-time support force value of shock absorber for supportingMethod of the vibration device damping size to control damper support force value, the method make damper support force value close to target force values orClose to damper institute supporter gravity, to achieve the purpose that vibration damping.Also disclose the several of liquid gas shock absorber for supporting damping controlKind scheme.In known technical solution, liquid gas shock absorber for supporting damping control is two-way control i.e. damper liquid stream institute back and forthIn the path flowed through wherein one section be not it is shared, need two groups of orifice valves and two groups of accessories, i.e. inlet and outlet of fuel channel is adopted respectivelyDifferent oil circuit control is controlled or is respectively adopted with different orifice valves, and structure is relative complex, single damping thereinValve selection one of which can only be optimal control, i.e., single damping in stretching two kinds of damping control or compression damping controlValve can only accomplish damping when damping or single optimum control compression when single optimum control stretches.
The technical problem to be solved in the present invention
One, damping when single fluid pathways or single orifice valve preferably cannot be stretched and be compressed to hydraulic cylinder is all playedOptimal adjusting control action.I.e. using single fluid pathways or single orifice valve cannot make into hydraulic cylinder liquid stream damping andThe liquid stream damping of outflow hydraulic cylinder is attained by optimal-damping control.
Two, currently existing scheme cannot detect liquid flow path direction, and fluid pathways need be divided into feed liquor oil circuit and out liquid oil circuit, so thatHydraulic system oil circuit is complicated, at high cost.
Three, structure is complicated for existing damping control method, and component is more, at high cost.
Technical solution of the present invention
Using hydro-pneumatic accumulator as elastic energy storage element, hydraulic cylinder, will be automatically controlled as kinetic energy and potential energy shift actuating memberValve is connected between hydraulic cylinder and hydro-pneumatic accumulator, and pressure, that is, hydraulic cylinder support force value in hydraulic cylinder passes through hydro-pneumatic accumulatorIt is controlled with the damping value of electrically-controlled valve, the detection device of setting detection liquid stream flow direction between hydraulic cylinder and hydro-pneumatic accumulator, for examiningSurveying real-time liquid flow path direction is to flow to hydro-pneumatic accumulator by hydraulic cylinder or flow to hydraulic cylinder from hydro-pneumatic accumulator, is surveyed with load-sensing unitMeasure shock absorber for supporting real-time support force value, the real-time support force value for the shock absorber for supporting that control assembly measures load-sensing unit withMaximum support force value needed for shock absorber for supporting (object support force value) is compared, and combines the detection device inspection of liquid stream flow directionWhat is measured flows to the damping of signal double-direction control electrically-controlled valve, and the support force value of shock absorber for supporting is controlled with this, is allowed to greatest extentGround is close to target force values.
Concrete scheme
Scheme 1, a kind of automatically controlled liquid gas shock absorber for supporting with liquid stream flow detection device include: hydro-pneumatic accumulator, liquid streamLiquid is to detection device, hydraulic cylinder, load-sensing unit, electrically-controlled valve, control assembly；It is characterized in that: electrically-controlled valve is serially connected in hydro-pneumatic accumulatorBetween hydraulic cylinder, load-sensing unit measures the liquid gas shock absorber for supporting to the real-time support force value of institute's supporter, and liquid stream liquid is to inspectionSurvey device detection liquid stream flow direction.The support force value that load-sensing unit measures is compared by control assembly with target force values, and is combinedThe liquid stream that liquid stream liquid is measured to detection device flows to signal, the damping of output control signal double-direction control electrically-controlled valve, i.e. liquid stream withoutBy being to flow to hydro-pneumatic accumulator from hydraulic cylinder or flow to hydraulic cylinder from hydro-pneumatic accumulator, control assembly can be transferred through the electrically-controlled valveReal time bidirectional controls liquid stream damping, to control the support force size of shock absorber for supporting, is pressing the hydraulic cylinder of shock absorber for supportingSupport force value when contracting or stretching is attained by maximum support force value, that is, is close to or up to object support force value.
Object support force value: referring to shock absorber for supporting support force value to be achieved, can be the reality according to support vibration dampingThe force value for needing to set, is also possible to the approximate gravity value of shock absorber for supporting institute supporter, and the approximate gravity value of supporter can be withIt is measured by load-sensing unit, such as using the average support force value of a certain unit time period of shock absorber for supporting as object support force value or workFor the approximate gravity value of institute's supporter of shock absorber for supporting.
Hydro-pneumatic accumulator: also known as accumulator or accumulator, are the energy-storage travelling wave tubes using gas as elastic fluid.
Liquid stream liquid is to detection device: for detecting liquid stream flow direction, liquid stream liquid herein is to detection device for detecting or sentencingDetermining liquid stream is to flow to hydro-pneumatic accumulator from hydraulic cylinder or flow to hydraulic cylinder from hydro-pneumatic accumulator.Machinery-electric induction formula flow direction is surveyedDevice, differential pressure pickup, pressure sensor etc. can be determined that the device of liquid flow path direction all can serve as liquid stream flow detection device.PressureThe method that force snesor detects liquid stream flow direction is to connect two pressure sensors at the both ends of electrically-controlled valve, has resistance since liquid stream flows throughWhen the electrically-controlled valve of Buddhist nun, it will form pressure difference at the both ends of electrically-controlled valve, keep the signal magnitude of two pressure sensors different, control assemblyBe compared by the signal to two pressure sensors, liquid stream flow direction must be from pressure it is high to flow to pressure low, sentenced with thisDetermine liquid flow path direction.
Load-sensing unit: refer to the component that can directly or indirectly measure pressure or force value, such as pressure sensor, force snesorDeng.Pressure sensor needs to calculate in conjunction with parameters such as the piston areas of hydraulic cylinder when measuring the support force value of shock absorber for supporting.
Electrically-controlled valve: refer to and controlled by current or voltage and to the component that liquid stream or air-flow have damping action or shutdown to act on, packetInclude MR damper, electro-rheological fluid damper, solenoid valve and proportional electromagnet type electrically-controlled valve herein etc..Electrically-controlled valve is being propped upMain function is to generate damping to liquid stream in support damper, to adjust the support force value of shock absorber for supporting.Using magnetic current variable resistanceThe corresponding liquid stream medium of the electrically-controlled valve of Buddhist nun's device or electro-rheological fluid damper should be magnetorheological fluid or ER fluid.
Control assembly: being also referred to as controller herein, and the function of control assembly is to receive the signal of processing sensor and connectThe other signals for needing to set or handle of processing are received, and export the damping value of damping control signal control electrically-controlled valve.Receive dynamometryReal-time force value or real-time pressure value that element measures, receive that liquid stream flow detection device measures flow to signal value etc., calculate andDetermine shock absorber for supporting institute supporter gravity value and target force values or target pressure value, by real-time measurement values and target value intoRow relatively, according to comparison result combination liquid stream flows to signal and exports damping for controlling signal control electrically-controlled valve etc. by demand for control allIt is the function that control assembly should have.
With shock absorber for supporting from liquid stream liquid to detection device damping control method:
When in real time, support force value is less than target force values, and flow detection is hydro-pneumatic accumulator when flowing to hydraulic cylinder, then liquid gasHydraulic coupling in accumulator is greater than the hydraulic coupling in hydraulic cylinder, exports the resistance that control signal reduces electrically-controlled valve by control assembly at this timeBuddhist nun's value increases real-time support force force value with this, and hydraulic cylinder is extensional motion state.
When in real time, support force value is less than target force values, and flow detection is hydraulic cylinder when flowing to hydro-pneumatic accumulator, then liquid gasHydraulic coupling in accumulator is less than the hydraulic coupling in hydraulic cylinder, exports the resistance that control signal increases electrically-controlled valve by control assembly at this timeBuddhist nun's value increases real-time support force force value with this, and hydraulic cylinder is contractile motion state.
When in real time, support force value is greater than target force values, and flow detection is hydraulic cylinder when flowing to hydro-pneumatic accumulator, at this time byControl assembly output control signal reduces the damping value of electrically-controlled valve, and hydro-pneumatic accumulator is made to absorb energy, hydraulic cylinder as much as possibleFor contractile motion state.
When in real time, support force value is greater than target force values, and flow detection is hydro-pneumatic accumulator when flowing to hydraulic cylinder, then liquid gasHydraulic coupling in accumulator is greater than the hydraulic coupling in hydraulic cylinder, exports the resistance that control signal increases electrically-controlled valve by control assembly at this timeBuddhist nun's value reduces real-time support force force value with this, and hydraulic cylinder is extensional motion state.
Scheme 2, automatically controlled liquid gas shock absorber for supporting as described in scheme 1: it is characterized in that: electrically-controlled valve is proportional electromagnet type electricityValve is controlled, which includes: automatically controlled valve body, spool, ratio electromagnetic coil, spring.
Its working principle is that:
When electromagnet current is smaller or no current, since the effect of spring force makes electromagnetic valve core keep right, damp as maximumValue, when being stepped up the electric current of electromagnet, for electromagnetic valve core since electromagnetic force is moved to the left, electric current is bigger, solenoid valve valveThe core amount of moving to left is bigger, the effective drift diameter super large of valve, damps smaller, i.e. the damping of valve is gradually reduced with the increase of electric current, with thisControl the damping value of electrically-controlled valve.
Scheme 3, automatically controlled liquid gas shock absorber for supporting as described in scheme 1: it is characterized in that: electrically-controlled valve is MR damper.
Scheme 4, automatically controlled liquid gas shock absorber for supporting as described in scheme 1, it is characterized in that: the liquid stream liquid of the damper is to detectionDevice is mainly made of permanent magnetism slide valve and flow detection valve body, has tongue tube or Hall element on flow detection valve body, foreverWhen magnetic slide valve moves up or down, control assembly passes through the signal detection liquid flow path direction of tongue tube or Hall element.
Scheme 5, automatically controlled liquid gas shock absorber for supporting as described in scheme 1, it is characterized in that: load-sensing unit is mainly by measurement vibration dampingThe force snesor of device support force is constituted.
Scheme 6, automatically controlled liquid gas shock absorber for supporting as described in scheme 1, it is characterized in that: load-sensing unit is mainly by measurement liquid streamThe pressure sensor of pressure is constituted.
Scheme 7, automatically controlled liquid gas shock absorber for supporting as described in scheme 1, it is characterized in that: the liquid stream liquid of the damper is to detectionDevice mainly by the pressure sensor that is connected between electrically-controlled valve and hydraulic cylinder and is connected between electrically-controlled valve and hydro-pneumatic accumulatorPressure sensor constitute, determine that liquid stream flows to and controls the resistance of electrically-controlled valve according to the measured value of pressure sensor by control assemblyBuddhist nun.
The method of the flow detection device detection liquid stream flow direction constituted with pressure sensor: pressure sensor is separately connectedAt electrically-controlled valve both ends, i.e., wherein a sensor connects between hydro-pneumatic accumulator and electrically-controlled valve, and another sensor connects hydraulicBetween cylinder and electrically-controlled valve.Control assembly receives pressure sensor signal, and control assembly is come by comparing two pressure sensor signalsIt calculates electrically-controlled valve both ends pressure difference and determines that liquid stream flows to this, in order to avoid the measurement error of pressure sensor causes pressure difference measurement notStandard causes flow direction to determine that inaccurate situation occurs, (such as when the pressure difference signal that control assembly detects is less than a certain setting value0.02MPa), (such as damping value is lower than most when and the control signal of control assembly output makes the damping value of electrically-controlled valve lower than a certain value2% damped greatly), then (such as damping value is set by the damping value that control assembly exports control signal increase damper to a certain setting valueIt is the 2% of maximum damping), with the accuracy for maintaining pressure difference to determine, to ensure the accuracy of flow detection and damping control.
Scheme 8, automatically controlled liquid gas shock absorber for supporting as described in scheme 1, it is characterized in that: the liquid stream liquid of the damper is to detectionDevice is mainly made of the differential pressure pickup for being connected to electrically-controlled valve both ends；Differential pressure pickup measures the pressure difference at electrically-controlled valve both ends and willPressure difference signal transmits pressure difference signal to controller by differential pressure signal line, and controller determines that liquid stream flows to according to pressure difference signal.
In order to avoid the measurement error of differential pressure pickup causes pressure difference measurement to be not allowed that flow direction is caused to determine inaccurate situation hairLife is as the method that scheme 7 uses, (such as when the pressure difference signal that control assembly detects is less than a certain setting value0.02MPa), (such as damping value is lower than most when and the control signal of control assembly output makes the damping value of electrically-controlled valve lower than a certain value2% damped greatly), then the damping value for controlling signal increase damper is exported by control assembly to a certain setting value (such as by damping valueIt is set as the 2% of maximum damping), with the accuracy for maintaining pressure difference to determine, to ensure the accurate of flow detection and damping controlProperty.
Beneficial effects of the present invention
One, single fluid pathways or single electrically-controlled valve is enable to require to realize to hydraulic cylinder stretching and press according to damping controlOptimal adjusting control action is all played in damping when contracting.
Two, by liquid stream flow detection, liquid gas shock absorber for supporting is enable to flow to the resistance for adjusting electrically-controlled valve in real time according to liquid streamDamping control requirement of the Buddhist nun to be optimal.
Three, keep damping control more simple, it is practical, and be easier to realize variable damper control, it is easier to realize that damping is adaptiveAnswer function.
Four, make liquid gas shock absorber for supporting structure simpler, component is less, and cost is lower.
Specific embodiment
Liquid gas shock absorber for supporting of 1. Fig. 1 of preferred embodiment with flow detection device
The liquid gas shock absorber for supporting includes: hydro-pneumatic accumulator (2), liquid stream flow detection device (15), pressure sensor(13), hydraulic cylinder (10), electrically-controlled valve (11), controller (6).
Flow detection device can use Fig. 5, magnetic inductive liquid stream flow detection device shown in fig. 6, liquid stream flow directionDetection device is mainly by: flow detection valve body (22), permanent magnetism slide valve (25), spring (24), valve union (23), tongue tube or suddenlyYou are constituted element (26).When liquid stream is static or to diagram flowing underneath when, permanent magnetism slide valve (25) by spring force be maintained at middle position orDiagram lower section, tongue tube or Hall element (26) no signal are pushed by the effect of liquid stream power；When liquid stream flows up, liquidPermanent magnetism slide valve (25) is pushed into diagram top by the effect for flowing power, and tongue tube or Hall element (26) detect magnetic signal, and are transmitted toController (6) is to determine liquid flow path direction.
Working principle:
Liquid stream flow detection device (15) and electrically-controlled valve (11), electricity are concatenated between hydro-pneumatic accumulator (2) and hydraulic cylinder (10)MR damper can be used by controlling valve (11), can also use proportional electromagnet type electrically-controlled valve shown in Fig. 4, pressure sensor(13) it connects between hydraulic cylinder (10) and electrically-controlled valve (11), pressure sensor (13) measures the pressure in hydraulic cylinder (10) and will pressureForce signal is given controller (6) by pressure sensor signal line (14) sending pressure signal, and liquid stream flow detection device (15) willLiquid stream flows to signal and will flow to signal by flow detection signal wire (16) and send controller (6) to.Controller (6) is according to pressureThe real-time support force value and the average support force value in the unit time that signal calculates shock absorber for supporting, when will calculate resulting unitInterior average support force value is compared as the object support force value of shock absorber for supporting with real-time support force value, and combines liquidStream flows to signal, and the damping value of output control signal control electrically-controlled valve (11) keeps the support force value of shock absorber for supporting close or waitsIn object support force value.
Damping control method is as follows:
When real-time support force value is less than target force values, and flow detection is that hydro-pneumatic accumulator (2) flow to hydraulic cylinder (10),Then the hydraulic coupling in hydro-pneumatic accumulator (2) is greater than the hydraulic coupling in hydraulic cylinder (10), exports control signal by controller (6) at this timeReduce the damping value of electrically-controlled valve (11), real-time support force force value is increased with this, hydraulic cylinder (10) is extensional motion state.
When real-time support force value is less than target force values, and flow detection is that hydraulic cylinder (10) flow to hydro-pneumatic accumulator (2),Then the hydraulic coupling in hydro-pneumatic accumulator (2) is less than the hydraulic coupling in hydraulic cylinder (10), exports control signal by controller (6) at this timeIncrease the damping value of electrically-controlled valve (11), real-time support force force value is increased with this, hydraulic cylinder (10) is contractile motion state.
When real-time support force value is greater than target force values, and flow detection is that hydraulic cylinder (10) flow to hydro-pneumatic accumulator (2),The damping value that control signal reduces electrically-controlled valve (11) is exported by controller (6) at this time, inhales hydro-pneumatic accumulator (2) as much as possibleEnergy is received, hydraulic cylinder (10) is contractile motion state.
When real-time support force value is greater than target force values, and flow detection is that hydro-pneumatic accumulator (2) flow to hydraulic cylinder (10),Then the hydraulic coupling in hydro-pneumatic accumulator (2) is greater than the hydraulic coupling in hydraulic cylinder (10), exports control signal by controller (6) at this timeIncrease the damping value of electrically-controlled valve (11), real-time support force force value is reduced with this, hydraulic cylinder (10) is extensional motion state.
Proportional electromagnet type electrically-controlled valve (as shown in Figure 4), the electrically-controlled valve include: automatically controlled valve body (19), spool (18), ratioExample electromagnetic coil (17), spring (24).Its working principle is that: when the electric current of ratio electromagnetic coil (17) is smaller or no current,It since the effect of spring force makes valve core of the electromagnetic valve (18) keep right, damps as maximum value, when being stepped up ratio electromagnetic coil (17)Electric current when, for valve core of the electromagnetic valve (18) since electromagnetic force is moved to the left, electric current is bigger, and valve core of the electromagnetic valve (18) amount of moving to left is got overGreatly, the effective drift diameter of valve is bigger, damps smaller, i.e. the damping of valve is gradually reduced with the increase of electric current, controls electrically-controlled valve with thisDamping value.
Liquid gas shock absorber for supporting of the preferred embodiment 2. with differential pressure type flow detection device
The liquid gas shock absorber for supporting includes: hydro-pneumatic accumulator (2), the flow detection being made of differential pressure pickup (12) dressIt sets, load cell (9), hydraulic cylinder (10), electrically-controlled valve (11), controller (6).
Working principle:
Electrically-controlled valve (11) are concatenated between hydro-pneumatic accumulator (2) and hydraulic cylinder (10), differential pressure pickup (12) connects in electrically-controlled valve(11) two sides, differential pressure pickup (12) measure the pressure difference at electrically-controlled valve (11) both ends and pressure difference signal are passed through differential pressure signal line(7) transmission pressure difference signal is given controller (6), and real-time measurement force value is passed through load cell signal line (8) by load cell (9)Send controller (6) to.Controller (6) calculates support force value and unit time in real time according to the measured value of load cell (9)Interior average support force value, using the average support force value calculated in the resulting unit time as the object support of shock absorber for supportingForce value is compared with real-time support force value, and is combined and flowed to signal control electrically-controlled valve (6) according to what pressure difference signal differentiatedDamping value, make the support force value of shock absorber for supporting close or equal to object support force value.
Damping control method is identical as damping control method used by preferred embodiment 1.
The liquid gas shock absorber for supporting for the flow detection device that preferred embodiment 3. is made of pressure sensor
The liquid gas shock absorber for supporting includes: hydro-pneumatic accumulator (2), the flow detection being made of pressure sensor (13) dressIt sets, hydraulic cylinder (10), electrically-controlled valve (11), controller (6).
Working principle:
Electrically-controlled valve (11) are concatenated between hydro-pneumatic accumulator (2) and hydraulic cylinder (10), pressure sensor (13) is connect respectively in electricityValve (11) two sides are controlled, pressure signal is simultaneously passed through pressure sensing by the pressure value of pressure sensor (13) measurement electrically-controlled valve (11) two sidesDevice signal wire (14) sends controller (6) to.Controller (6) calculates real-time support force according to the measured value of pressure sensor (13)Value, the average support force value in the unit of account time determine liquid stream flow direction；The average support that will be calculated in the resulting unit timeForce value is compared as the object support force value of shock absorber for supporting with real-time support force value, and combines liquid stream traffic organising automatically controlledThe damping value of valve makes the support force value of shock absorber for supporting close or equal to object support force value.
Damping control method is identical as damping control method used by preferred embodiment 1.