CN101749353B - Electrohydraulic energy-regenerative type shock absorber - Google Patents
Electrohydraulic energy-regenerative type shock absorber Download PDFInfo
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- 230000035939 shock Effects 0.000 title claims abstract description 21
- 239000006096 absorbing agent Substances 0.000 title claims abstract description 19
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- 239000007788 liquid Substances 0.000 claims description 23
- 238000010248 power generation Methods 0.000 claims description 13
- 238000013016 damping Methods 0.000 claims description 12
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Abstract
The invention relates to an electrohydraulic energy-regenerative type shock absorber, which comprises a hydraulic circuit, a working chamber and a piston, wherein the working chamber is divided into a piston working cavity and an accumulating power-generating cavity by a partition plate (13), and the piston is positioned in the piston working cavity and is connected with an external upper mounting base (7) through a piston push rod (8); a hydraulic motor (4) is positioned in the energy storage power-generating cavity and is connected with an external rotary generator (5) through a driving shaft, and an accumulator (3) is positioned in the accumulating power-generating cavity and is positioned below the partition plate (13); and the hydraulic circuit and a plurality of one-way valves (6) form a hydraulic rectifier bridge, and the hydraulic circuit adopts the method that an external pipeline is arranged outside the piston or the piston is designed to form internal and external cavities. The invention has simple structure, fewer components and small volume, can allow the energy generated by vehicle vibration to be fully used for doing work, can effectively recover vibration energy, has better shock absorbing effect than the existing shock absorber, and also prolongs the service life of the generator.
Description
Technical field
The present invention relates to vibration damper, particularly relate to a kind of electrohydraulic energy-regenerative type shock absorber that is used for vehicle suspension system, and have the function that a part of vibrational energy is reclaimed, can also realize the active or half ACTIVE CONTROL of suspension system as actuator.
Background technique
When vehicle travels on the road surface, the jolting and the acceleration and deceleration of vehicle, operation such as turn to cause producing relative vibration between spring carried mass and the nonspring carried mass of road surface, vibration damper changes this part mechanical energy into thermal dissipation with the form that rubs and falls, thus the vibration of decay vehicle.If these energy can be recycled, then can reduce the automobile energy consumption, thereby realize the purpose of energy saving.The present invention just is being based on a kind of like this thought, promptly substitutes traditional vibration damper with the vibration damper with energy recovery function, by the energy recovery that vibration damper dissipated, realizes a new vehicle energy saving approach with originally.
The existing energy vibration damper that reclaims vibrational energy by generator various informative, but all have certain defective.
As Chinese patent ZL00232651.5 description is that linear electric motor are used in the vibration damper, straight line motion mechanical energy is directly changed into electric energy or electric energy is directly changed into straight line motion mechanical energy, and, can offset road recovery section energy when impacting without any need for the transmission device of intermediate conversion mechanism.Its shortcoming is that linear electric motor are big than the Magnetic leakage flux of electric rotating machine, and damping force is little, can not be applicable to heavy vehicle; Electrical propertieies such as its power factor and efficient are lower, and energy recovery efficiency is general; Complicated and the easily inefficacy of the supporting structure of linear electric motor vibration damper, structural reliability is general; Costing an arm and a leg of linear electric motor, supporting structure complexity, manufacture cost height.
What Chinese patent ZL02203432.3 described is to have added a cover crank linkage mechanism in conventional suspension systems, and the up-down vibration of wheel is transformed into rotatablely moving of motor.What Chinese patent ZL200620090847.4 described is to replace vibration damper with motor and pinion and rack, with linkage mechanism dynamoelectric machine is fixed on the spring carried mass, and tooth bar directly is connected on the nonspring carried mass, and gear links to each other with the dynamoelectric machine rotor.After the wheel and rack engagement, the whole energy regenerative element that constitutes the energy regenerative suspension of dynamoelectric machine and pinion and rack.These two technology are automobile and produce a double vibrations, and this device only picks up the energy of half approximately, because the parts that have the time of half to be used for device reset, energy recovery efficiency is low; And the device volume of above-mentioned two technology and quality are all bigger, and be difficult during installation.
What Chinese patent publication number 1626370A described is to adopt ball screw framework, the straight line motion between spring carried mass and the nonspring carried mass is transformed into the rotation of rotor.Motor and ball screw framework are formed the energy regenerative element, with the energy transport that reclaims to charging circuit and battery.In the vehicle driving process, the energy regenerative vibration damper is done to uphold and compression movement with Uneven road, ball nut is done translation up and down vertically, drive ball screw and rotor and do positive and negative rotation, motor works in electronic or braking state according to control command, it is that thereby active buffer and decay are caused by Uneven road and conduct to the shock and vibration of vehicle body and recovered energy by wheel.Pinion and-rack or ball wire rod-type etc. are the influence that is subjected to the power train internal void with mechanical device with the shortcoming that straight line motion changes the energy-recuperation system of rotation into, and system is non-vanishing to the frequency response function of high-frequency signal.In low-frequency range and excitation amplitude in ground when big, its energy recovery efficiency and suspension performance are better as the ball wire rod-type; And when system frequency was higher, its suspension performance was not as good as passive suspension, also can't recovered energy, and cause entire system efficient lower.
More than straight line motion is changed in the technology of rotation, motor all is solid-state the connection with transmission system, this cause motor can along with system vibration constantly change sense of rotation and repeatedly motor speed by 0-＞acceleration-＞slow down-＞circulation of motor speed 0, produce a large amount of " inertia loss ".This not only can shorten the generator life-span greatly, also can make generator have only little time or not free fully the generating in whole vibration processes, causes whole energy regenerative system effectiveness low, to such an extent as to can not be applicable to practical application.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of efficiently, be convenient to install, be convenient to safeguard, can be applied to the electrohydraulic energy-regenerative type shock absorber of all vehicle automobiles or other Motor Vehicle.
The present invention solves its technical problem and adopts following technological scheme:
Electrohydraulic energy-regenerative type shock absorber provided by the invention, it comprises oil hydraulic circuit, working room and piston.This working room is divided into pistons work chamber and energy storage power generation chamber two-part by dividing plate, and wherein: piston is arranged in the pistons work chamber, and it links to each other with the last mounting base of outside by piston push rod; Oil hydraulic motor is arranged in the energy storage power generation chamber, and it links to each other with the rotary generator of outside by transmission shaft; Accumulator is arranged in the energy storage power generation chamber, and it is positioned at the dividing plate below.Oil hydraulic circuit and a plurality of one-way valve constitute the hydraulic pressure rectifier bridge, oil hydraulic circuit adopt outside piston, arrange external pipeline or plunger designs become in the form of exocoel.
Electrohydraulic energy-regenerative type shock absorber provided by the invention, its purposes is: when automobile or other motor-driven vehicle going, its the road surface jolt and the acceleration and deceleration of vehicle, spring carried mass that steering operation causes and nonspring carried mass between produce the energy of relative vibration, damping is provided and absorbs this energy by the alternative traditional vibration damper of vibration damper of the present invention.
The present invention compared with prior art has following main advantage:
One. the energy that automobile vibration produces can be used for fully acting.
The hybrid system of employing machine-electricity-liquid utilizes the flexibility of hydraulic system to make this energy vibration damper straight line motion changed into the counter-rotating of avoiding generator in the rotating process, does not produce the inertia loss, but the energization reuse efficiency, and prolong the generator life-span.
They are two years old. and can reclaim vibrational energy effectively, and have the effectiveness in vibration suppression that is better than existing vibration damper.
Can overcome in the energy vibration damper of Purely mechanical because the relatively poor defective of suspension high frequency response characteristic that the matching gap of transmission component causes makes automobile can both reclaim vibrational energy effectively on any road surface, have the effectiveness in vibration suppression that is better than existing vibration damper.
They are three years old. and simple in structure, component are less, and volume is little.Based on the suspension system that this kind form vibration damper is set up, i.e. energy-conserving and environment-protective can improve the damping property of suspension again, have important practical significance.
Description of drawings
Fig. 1 is basic principle figure of the present invention.
Fig. 2 is a structural representation of the present invention.
Among the figure: 1. piston; 2. hydraulic pressure rectifier bridge; 3. accumulator; 4. oil hydraulic motor; 5. rotary generator; 6. one-way valve; 7. go up mounting base; 8. piston push rod; 9. loam cake; 10. first oil sealing; 11. first one-way valve; 12. second one-way valve; 13. dividing plate; 14. low pressure line; 15. second oil sealing; 16. following mounting base; 17. lower cover; 18. the 3rd one-way valve; 19. the 4th one-way valve; 20. the 5th one-way valve; 21. pressure duct.
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
The present invention is to provide a kind of electrohydraulic energy-regenerative type shock absorber that is applied to the vehicle technology field.The hybrid system of its employing machine-electricity-liquid, its working principle is that the linear relative movement of the spring carried mass that will be caused by the ground injustice by the hydraulic pressure rectifier bridge and nonspring carried mass is transformed into the constant flow of pressurized of direction and drives the oil hydraulic motor rotation, drive generator for electricity generation by oil hydraulic motor, reclaimed thereby vibration mechanical energy is converted into electric energy.Its basic structure is as shown in Figure 1: mainly comprise piston 1, hydraulic pressure rectifier bridge 2, accumulator 3, oil hydraulic motor 4 and rotary generator 5.During automobile vibration, piston is converted into the hydraulic pressure energy by the to-and-fro motion acting with mechanical energy.The hydraulic pressure rectifier bridge is realized by pressure duct, low pressure line and some one-way valves, does not wherein establish damping hole, reduces the thermal loss that produces in the flow of fluid as far as possible.The potential energy that this form both can stretch when vibration with compression makes full use of, and the inertia loss that can avoid the generator counter-rotating to bring again increases the generating efficiency of generator, prolongs generator working life.The reaction force of the counterelectromotive force that the required damping force of vibration damper system is mainly produced by the generator working room provides.
Hydraulic pressure rectifier bridge 2 is made of oil hydraulic circuit and a plurality of one-way valve, wherein oil hydraulic circuit can outside piston, arrange external pipeline or plunger designs become in the form formation of exocoel.Its major function is to cause the straight line motion of damper piston to change rotatablely moving of oil hydraulic motor into automobile vibration, is generated electricity by hydraulic motor-driving generator.Its principle is piston to be stretched and the hydraulic pressure fluctuation rectification of the different flow directions that compression stroke produces is the identical hydraulic pressure fluctuation of flow direction, makes flow of pressurized to the oil hydraulic motor acting continuously, thereby reaches the purpose of avoiding generator to reverse.One-way valve can be selected various ways, should use impedance little as far as possible, dynamic response sensitivity, good airproof performance, the one-way valve that reliability is high.
Accumulator 3 can be taked bladder or the piston spring formula, and its effect is a stored energy, makes the hydraulic pressure fluctuation as far as possible steadily.Because the not flat characteristic on ground causes automobile might occur the very high excitation of peak value in the process of moving, accumulator during with high amplitude the part energy of ground excitation absorb and store, hour release energy gradually in ground excitation then, make the more smooth-going of generator operation, to improve generating efficiency.
Oil hydraulic motor 4 wants cube little, and the efficient height has multiple matured product available on the market.
Rotary generator 5 requires micro high efficiency equally, satisfy with the long-pending coupling of damper piston cylindrical shell in, power requirements in the time of also need satisfying as generator and the torque request during as the motor actuator.
Electrohydraulic energy-regenerative type shock absorber provided by the invention, its structure be as shown in Figure 2: comprise oil hydraulic circuit, working room and piston.
Described working room is divided into pistons work chamber and energy storage power generation chamber two-part by dividing plate 13, and wherein: piston is arranged in the pistons work chamber, and it links to each other with the last mounting base 7 of outside by piston push rod 8; Oil hydraulic motor 4 is arranged in the energy storage power generation chamber, and it links to each other with the rotary generator 5 of outside by transmission shaft; Accumulator 3 is arranged in the energy storage power generation chamber, and it is positioned at the below of dividing plate 13; Oil hydraulic circuit and a plurality of one-way valve 6 constitutes hydraulic pressure rectifier bridges 2, oil hydraulic circuit adopt outside piston, arrange external pipeline or plunger designs become in the form of exocoel.
Described accumulator 3 can adopt piston spring formula accumulator, and it is low that it has a cost with respect to bladder accumulator, the high and easy-to-install advantage of reliability, and bladder accumulator then has in light weight, takies the little advantage of volume.
Described oil hydraulic motor 4 can adopt crescent gear motor, and its advantage is that volume is little, with one heart, and the efficient height.
Described electric rotating machine 5 can adopt non-brush permanent-magnet DC motor, is connected by transmission shaft is solid-state with oil hydraulic motor 4.
Described a plurality of one-way valve 6 comprises first one-way valve 11, second one-way valve 12, the 3rd one-way valve 18, the 4th one-way valve 19, the 5th one-way valve 20, they all adopt steel ball commonly used in hydraulic system to add the mode of locating spring, this kind form structure is simple, with low cost, impedance is less, dynamic response is sensitive, relatively is fit to condition required for the present invention.
Described external pipeline can comprise pressure duct 21 and low pressure line 14.Than more than 14 one-way valves of low pressure line (the 3rd one-way valve 18 among Fig. 2), its objective is and when accumulator 3 works, reduce the dynamic action that dead cavity volume phenomenon causes on the described pressure duct 21.
Be furnished with first oil sealing 10 and second oil sealing 15 respectively at loam cake shown in Figure 29 and lower cover 17 places, technical requirements to this two places oil sealing is higher, should guarantee that liquid does not leak in the vibration damper working procedure, reduce by first oil sealing again to the sliding friction of piston push rod 8 and second oil sealing, to reduce the frictional loss of energy to oil hydraulic motor 4 transmission shafts as far as possible.
Above-mentioned electrohydraulic energy-regenerative type shock absorber provided by the invention, its purposes is: when automobile or other motor-driven vehicle going, its the road surface jolt and the acceleration and deceleration of vehicle, spring carried mass that steering operation causes and nonspring carried mass between produce the energy of relative vibration, damping is provided and absorbs this energy by the alternative traditional vibration damper of described electrohydraulic energy-regenerative type shock absorber.
The spring carried mass that this vibration damper will be caused by the ground injustice by the hydraulic pressure rectifier bridge and the linear relative movement of nonspring carried mass are transformed into the constant flow of pressurized of direction and drive the oil hydraulic motor rotation, drive generator for electricity generation by oil hydraulic motor, thereby vibration mechanical energy is converted into electric energy utilized.
The reaction force of the counterelectromotive force that produces when the required damping force of this vibration damper is worked by generator provides.
Electrohydraulic energy-regenerative type shock absorber of the present invention is with general the different of liquid spring unit maximum: the required damping force of mutual friction and Extrusion generation vibration damper when liquid spring unit relies on liquid by little valve port between the fluid molecule; Electrohydraulic energy-regenerative type shock absorber then is that the counterelectromotive force effect that produces when relying on generator work produces the required damping force of vibration damper, and in order fully to reclaim vibrational energy, resistance suffered before the liquid arrival oil hydraulic motor is the smaller the better.
Working procedure of the present invention is: piston push rod 8 drive pistons 11 move reciprocatingly when vibrating in the vehicle traveling process.When piston 1 is in compression stroke, liquid in the pistons work chamber that is formed by piston 1 and dividing plate 13 is pushed the 4th one-way valve 19 open, this liquid enters the energy storage power generation chamber through pressure duct 21 by the 3rd one-way valve 18, the hydraulic pressure fluctuation is rotated through accumulator 3 rectifying and wave-filtering rear driving oil hydraulic motors 4,5 generatings of oil hydraulic motor 4 driven rotary generators, the reaction force that produces during rotary generator 5 work makes the relative liquid of oil hydraulic motor produce damping function, the most of damping that is vibration damper is produced by rotary generator, liquid by oil hydraulic motor after low pressure line 14 is pushed first one-way valve 11 open in the cavity of return piston top, though this moment, second one-way valve 12 also was subjected to the influence of withdrawing fluid pressure, but because or during piston compression stroke its inboard be high pressure, withdrawing fluid is a low pressure, and second one-way valve is in closed condition; When piston 1 is in stretching travel, liquid in the working cavity that is formed by piston 1 and loam cake 9 is pushed the 5th one-way valve 20 open, this liquid enters the energy storage power generation chamber through pressure duct 21 by the 3rd one-way valve 18, liquid by oil hydraulic motor 4 after low pressure line 14 push open in the cavitys of return pistons below, second one-way valve 12 back, this moment, first one-way valve, 11 upsides were high pressure, withdrawing fluid is a low pressure, and first one-way valve 11 is in closed condition.Like this, no matter piston is in compression or stretching travel, and the liquid flow path direction of process oil hydraulic motor 4 can not change.
Inner liquid flow movement direction when the direction of arrow that marks among Fig. 2 is worked for vibration damper of the present invention.
Claims (5)
1. electrohydraulic energy-regenerative type shock absorber, comprise hydraulic pressure rectifier bridge, working room and piston, it is characterized in that this working room is divided into pistons work chamber and energy storage power generation chamber two-part by dividing plate (13), wherein: piston is arranged in the pistons work chamber, and it links to each other by the last mounting base (7) of piston push rod (8) with the outside; Oil hydraulic motor (4) is arranged in the energy storage power generation chamber, and it links to each other by the rotary generator (5) of transmission shaft with the outside; Accumulator (3) is arranged in the energy storage power generation chamber, and it is positioned at dividing plate (13) below; The hydraulic pressure rectifier bridge is made of oil hydraulic circuit and a plurality of one-way valve (6), wherein oil hydraulic circuit adopt outside piston, arrange external pipeline or plunger designs become in the form formation of exocoel, described a plurality of one-way valves (6) comprise first one-way valve (11), second one-way valve (12), the 3rd one-way valve (18), the 4th one-way valve (19), the 5th one-way valve (20); When piston is in compression stroke, the liquid that is positioned at the pistons work chamber of piston one side is pushed the 4th one-way valve open, enter the energy storage power generation chamber through pressure duct by the 3rd one-way valve, the hydraulic pressure fluctuation is rotated through accumulator rectifying and wave-filtering rear driving oil hydraulic motor, and then driven rotary generator for electricity generation, the reaction force that produces during rotary generator work makes the relative liquid of oil hydraulic motor produce damping function, described then liquid returns the pistons work cavity that is positioned at the piston opposite side by oil hydraulic motor after low pressure line is pushed first one-way valve open, this moment, second one-way valve was in closed condition; When piston is in stretching travel, liquid by the pistons work cavity that is positioned at the described opposite side of piston is pushed the 5th one-way valve open, this liquid enters the energy storage power generation chamber through pressure duct by the 3rd one-way valve, liquid by oil hydraulic motor after low pressure line returns the pistons work cavity that is positioned at the described side of piston after pushing second one-way valve open, this moment, first one-way valve was in closed condition, like this, no matter piston is in compression or stretching travel, and the liquid flow path direction of process oil hydraulic motor can not change.
2. electrohydraulic energy-regenerative type shock absorber according to claim 1, what it is characterized in that described oil hydraulic motor (4) employing is crescent gear motor.
3. electrohydraulic energy-regenerative type shock absorber according to claim 1, what it is characterized in that described rotary generator (5) employing is non-brush permanent-magnet DC motor.
4. electrohydraulic energy-regenerative type shock absorber according to claim 1 is characterized in that described a plurality of one-way valve (6) all adopts steel ball to add the one-way valve of locating spring structure.
5. electrohydraulic energy-regenerative type shock absorber according to claim 1, what it is characterized in that described accumulator (3) employing is piston spring formula accumulator.
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| CN2010101088897A CN101749353B (en) | 2010-01-27 | 2010-01-27 | Electrohydraulic energy-regenerative type shock absorber |
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| CN2010101088897A CN101749353B (en) | 2010-01-27 | 2010-01-27 | Electrohydraulic energy-regenerative type shock absorber |
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| CN101749353B true CN101749353B (en) | 2011-10-19 |
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