CN103615490B - A kind of energy feedback self-control magneto-rheological shock absorber - Google Patents
A kind of energy feedback self-control magneto-rheological shock absorber Download PDFInfo
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- CN103615490B CN103615490B CN201210435035.9A CN201210435035A CN103615490B CN 103615490 B CN103615490 B CN 103615490B CN 201210435035 A CN201210435035 A CN 201210435035A CN 103615490 B CN103615490 B CN 103615490B
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Abstract
The present invention relates to a kind of energy feedback self-control magneto-rheological shock absorber, by piston rod, clutch release slave cylinder, compensation device, piston is formed, operating cylinder is divided into epicoele and cavity of resorption by piston, on, damp channel is provided with between cavity of resorption, energy feedback chamber is provided with in described piston, the both sides in this energy feedback chamber are provided with two magnetic poles, be respectively S pole and N pole, field coil is provided with between two magnetic poles, this field coil is connected with a leading screw passing its endoporus, leading screw and a nut being fixed on energy feedback chamber suitable, described leading screw and described clutch release slave cylinder are rotationally connected.It is simple that the present invention has structure, need not time row signal transmission, independently carry out the control of electric current according to surface conditions, and there is the effect of energy-saving and emission-reduction.
Description
Technical field
The present invention relates to a kind of vehicle shock absorber, especially relate to a kind of magneto-rheological vibration damper.
Background technique
Magneto-rheological vibration damper had both had the stepless controllability of Active vibration-reducing system because of its damping force, had again the safety reliability of passive structure to a certain extent.Magneto-rheological vibration damper can realize the continuous adjustment of damping, and there is the features such as response frequency is high, damping change is obvious, operating voltage is low, consume energy less, controlling device structure is simple, cost is low, therefore have a extensive future in stream mutative damp adjustment semi-active suspension, and become one of focus of current automotive industry investigation and application.The working medium of magneto-rheological vibration damper is magnetic flow liquid, and it is characterized in that yield strength increases along with the increase of additional electromagnetic field intensity, namely damping constant changes with the change of electromagnetic field.Therefore, the working principle of vibration damper is the damping constant utilizing controlled electromagnetic field to change magnetic flow liquid, reach Automatic adjusument vibration damper work damping force according to different roads and running condition by suitable control strategy, thus improve riding comfort and operational stability.
Magnetic flow liquid is a kind of novel intellectual material, and rheological properties is continuous, reversible, rapid, be easy to control, and the field can applied in engineering is very extensive.Current result of study shows, magnetic converting technique can be applied in fields such as mechanical engineering, automotive engineering, control automatically, Ultra-precision Turning, Aero-Space and defence engineerings.Wherein, magnetic converting technique is applied to automotive semi-active suspension is a more popular technology.Magneto-rheological vibration damper working principle is: due to the effect of externally-applied magnetic field, and the rheological properties of magnetic flow liquid changes, and the damping force causing the magnetic flow liquid flowing through magneto-rheological vibration damper damp channel to produce changes.Therefore can be changed the size of magneto-rheological vibration damper damping force by the size changing magnetic intensity, thus reach the object of intelligent vibration damping.Domestic aspect, the people such as Liao Changrong have carried out experimental research for the automobile-used MR damper of certain type.The people such as Hu Hongsheng have studied magneto-rheological vibration damper structural design under impulsive load and dynamic characteristic.Abroad, magneto-rheological vibration damper has started to use in automotive seat, earthquake-resistant building, bridge vibration damping and many military fields, as the vehicle shock absorber of Lord company of U.S. exploitation, total length 15cm, effective magnetorheological scale of construction is 0.3mm, and electric power disappears l5w, and car seat amplitude can be made to reduce 25% ~ 50%.The uniqueness of energy magneto-rheological vibration damper structure certainly will determine that it has unique researching value.
Magneto-rheological vibration damper is the novel controllable damper of one based on magnetic flow liquid controllable characteristics.By the magnetic field regulating the electric current in field coil to obtain varying strength, under making the effect of magnetic flow liquid outside magnetic field, the magnetisation movement direction of the magnetic microparticles of its random distribution is roughly parallel to magnetic direction, magnetisation movement makes particulate join end to end, form the reticular structure of chain structure or complexity, thus the rheological properties of magnetic flow liquid is changed, change the damping force of vibration damper.
Magneto-rheological vibration damper is made up of piston rod, clutch release slave cylinder, compensated chamber, a few part of piston.Operating cylinder is divided into upper and lower two chambeies by piston, and electromagnetic coil is wound on drum and is sealed in internal piston, by hollow piston rod extracting power supply cord.The magnetic field that electromagnetic coil produces, through the damp channel be positioned on piston, adopts different electric currents to produce different magnetic field, and then the kinematic viscosity of magnetic flow liquid between damping adjusting passage, realizes the control to damping force size.Piston rod to-and-fro motion in clutch release slave cylinder of vibration damper, fluid in lower work chamber flows in damp channel, when piston rod makes extensional motion, due to the existence of piston rod, be not enough to be full of from the magnetic flow liquid above flow down the volume that cavity of resorption increases, so that lower active chamber produces negative pressuren zone, so need be compensated lower active chamber by compensated chamber.Because magnetic flow liquid is under magnetic fields, its flow characteristic changes, thus it is adjustable to achieve damping.
During compression stroke: the magnetic flow liquid in pressure cylinder flows to epicoele by cavity of resorption by damp channel, now make field coil produce magnetic field to the magnetic flow liquid effect in damping hole by impressed current, cause the change of magnetic flow liquid viscosity, reach effectiveness in vibration suppression.
During extension stroke: the magnetic flow liquid in pressure cylinder flows to cavity of resorption by epicoele by damp channel, equally, now add impressed current, magnetic flow liquid viscosity changes, and reaches the effect of vibration damping.
Magneto-rheological vibration damper is exactly by controlling the activity of vibration damper to the flow of fluid in gap, and within magnetic saturation scope, almost can the damping capacity of electrodeless modified tone vibration damper to the flow of interstitial fluid by electric current.
But, existing magneto-rheological vibration damper needs first to obtain the amplitude of a body oscillating and the signal of frequency, again by this signal, controlled to provide electric current to it by control system, thus the viscosity realizing magnetic flow liquid changes according to the change of road conditions, this system is comparatively complicated, just in case there is the fault of signal transmission and control system, just can not complete the control to magneto-rheological vibration damper.Meanwhile, it in use also needs to consume a large amount of electric energy, and this is for automobile storage battery being a larger burden.
Summary of the invention
The present invention mainly solves the complex structure existing for prior art, signal transfer line is longer, easily break down, the technical problems such as energy consumption is large, there is provided a kind of structure simple, need not time row signal transmission, independently carry out the control of electric current according to surface conditions, and there is the energy feedback self-control magneto-rheological shock absorber of effects of energy saving and emission reduction.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals: a kind of energy feedback self-control magneto-rheological shock absorber, by piston rod, clutch release slave cylinder, compensation device, piston is formed, operating cylinder is divided into epicoele and cavity of resorption by piston, on, damp channel is provided with between cavity of resorption, it is characterized in that being provided with energy feedback chamber in described piston, the both sides in this energy feedback chamber are provided with two magnetic poles, be respectively S pole and N pole, field coil is provided with between two magnetic poles, this field coil is connected with a leading screw passing its endoporus, leading screw and a nut being fixed on energy feedback chamber suitable, described leading screw and described clutch release slave cylinder are rotationally connected.The present invention in use, because automobile running is on the road surface of jolting, there is body oscillating, piston is moved up and down in clutch release slave cylinder, in its process moved up and down, drive nut moves, can drive screw turns in the moving process of nut, because leading screw is provided with field coil, cutting magnetic induction line effect done by excitation circle, generation current, namely the electric current of this change produces magnetic field.Body oscillating is larger, and the speed that nut moves up and down is faster, and frequency is higher, and the rotation of field coil simultaneously also gets over block, and the electromagnetic field of generation is also larger, and the viscosity of magnetic flow liquid is higher, and damping is larger.Therefore, the control system of the complexity that the utility model saves, have that structure is simple, precise control, energy-saving and emission-reduction effect.
As preferably, described compensation device comprises a floating piston be located in cylinder body, and the downside of this floating piston is sealed air chamber, and sealing air chamber is provided with an inflation inlet.Piston rod to-and-fro motion in clutch release slave cylinder of vibration damper, fluid in lower work chamber flows in damp channel, when piston rod makes extensional motion, due to the existence of piston rod, be not enough to be full of from the magnetic flow liquid above flow down the volume that cavity of resorption increases, so that lower active chamber produces negative pressuren zone, so need be compensated lower active chamber by compensated chamber.
As preferably, described leading screw is rotationally connected by a connecting rod and cavity of resorption, and connecting rod is located at the through hole of piston underside through one, is provided with a seal ring suitable with described connecting rod in this through hole.Connecting rod can rotate relative to through hole, and piston also can move up and down along connecting rod.But due to the existence of seal ring, can prevent magnetic flow liquid from entering in energy feedback chamber.
As preferably, described leading screw is connected with the upper end of described field coil by a link press span, and described nut is connected with the lower end in described energy feedback chamber by a support.
As preferably, the upper end of described cylinder body is provided with a guiding-sealing device, guiding-sealing device comprises a cock body and an end cap, the endoporus of cock body is provided with an annular trough body, and the lower end of annular trough body is provided with guide ring, guide ring and described piston rod Spielpassung, the upper end of annular trough body is provided with flinger ring, this flinger ring and described piston rod suitable, the outside of cock body is provided with seal ring, is provided with oil sealing in described end cap and the suitable endoporus of piston rod.Be provided with flinger ring in the outer end of guide ring, the value that flinger ring exists mainly solves the internal leakage of guider position, directly ensures Low speed damping force.Piston rod overlaps for Spielpassung with guiding anti-attrition, and gap is little, does not just need flinger ring, but easily causes clamping stagnation; Gap is large, and internal leakage strengthens, and can not set up enough pressure (particularly during low speed), causes force value less than normal, add that flinger ring can solve at piston upper chamber.The structural design of flinger ring, can prevent too much hydraulic oil from clashing into oil sealing, substantially reduce the aging metaboly of oil sealing, thus ensure that the performance of vibration damper and every technical requirements.Make its performance more stable, improve quality and the working life of vibration damper.
The beneficial effect brought of the present invention is, solve the complex structure existing for prior art, signal transfer line is longer, easily break down, the technical problems such as energy consumption is large, achieve a kind of structure simple, need not time row signal transmission, independently carry out the control of electric current according to surface conditions, and there is the effect of energy-saving and emission-reduction.
Accompanying drawing explanation
Accompanying drawing 1 is a kind of structural representation of the present invention;
Accompanying drawing 2 is a kind of partial enlarged drawings of the present invention.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, technological scheme of the present invention is described in further detail.
Embodiment: as shown in Figure 1, the present invention is a kind of energy feedback self-control magneto-rheological shock absorber, by piston rod 2, clutch release slave cylinder 1, compensation device, piston 3 is formed, operating cylinder is divided into epicoele 5 and cavity of resorption 6 by piston 3, on, damp channel is provided with between cavity of resorption, energy feedback chamber 27 is provided with in described piston, the both sides in this energy feedback chamber 27 are provided with two magnetic poles 25, be respectively S pole and N pole, field coil 4 is provided with between two magnetic poles, this field coil 4 is connected with a leading screw 21 passing its endoporus, leading screw 21 and a nut 22 being fixed on energy feedback chamber suitable, leading screw 21 is connected with the upper end of described field coil by a link press span, described nut 22 is connected with the lower end in described energy feedback chamber by a support 23.Leading screw is rotationally connected by a connecting rod 26 and cavity of resorption, and connecting rod 26 is located at the through hole 24 of piston underside through one, is provided with a seal ring suitable with described connecting rod in this through hole.Compensation device comprises a floating piston 8 be located in cylinder body, and the downside of this floating piston is sealed air chamber 7, and sealing air chamber 7 is provided with an inflation inlet 9.The upper end of cylinder body is provided with a guiding-sealing device, guiding-sealing device comprises a cock body 15 and an end cap 18, the endoporus of cock body 15 is provided with an annular trough body, the lower end of annular trough body is provided with guide ring 16, guide ring 16 and described piston rod 2 Spielpassung, the upper end of annular trough body is provided with flinger ring 17, and this flinger ring 17 is suitable with described piston rod 2, the outside of cock body is provided with seal ring 19, is provided with oil sealing 20 in the endoporus that described end cap 18 is suitable with piston rod.
The present invention in use, because automobile running is on the road surface of jolting, there is body oscillating, piston is moved up and down in clutch release slave cylinder, in its process moved up and down, drive nut moves, can drive screw turns in the moving process of nut, because leading screw is provided with field coil, cutting magnetic induction line effect done by excitation circle, generation current, namely the electric current of this change produces magnetic field.Body oscillating is larger, and the speed that nut moves up and down is faster, and frequency is higher, and the rotation of field coil simultaneously also gets over block, and the electromagnetic field of generation is also larger, and the viscosity of magnetic flow liquid is higher, and damping is larger.Therefore, the control system of the complexity that the utility model saves, have that structure is simple, precise control, energy-saving and emission-reduction effect.
Claims (5)
1. an energy feedback self-control magneto-rheological shock absorber, by piston rod, clutch release slave cylinder, compensation device, piston is formed, operating cylinder is divided into epicoele and cavity of resorption by piston, on, damp channel is provided with between cavity of resorption, it is characterized in that being provided with energy feedback chamber in described piston, the both sides in this energy feedback chamber are provided with two magnetic poles, be respectively S pole and N pole, field coil is provided with between two magnetic poles, this field coil is connected with a leading screw passing its endoporus, leading screw and a nut being fixed on energy feedback chamber suitable, described leading screw and described clutch release slave cylinder are rotationally connected.
2. a kind of energy feedback self-control magneto-rheological shock absorber according to claim 1, is characterized in that described compensation device comprises a floating piston be located in cylinder body, and the downside of this floating piston is sealed air chamber, and sealing air chamber is provided with an inflation inlet.
3. a kind of energy feedback self-control magneto-rheological shock absorber according to claim 1, it is characterized in that described leading screw is rotationally connected by a connecting rod and cavity of resorption, the through hole that connecting rod is located at piston underside through one, is provided with a seal ring suitable with described connecting rod in this through hole.
4. a kind of energy feedback self-control magneto-rheological shock absorber according to claim 3, it is characterized in that described leading screw is connected with the upper end of described field coil by a link press span, described nut is connected with the lower end in described energy feedback chamber by a support.
5. a kind of energy feedback self-control magneto-rheological shock absorber according to claim 1 or 2 or 3 or 4, it is characterized in that the upper end of described cylinder body is provided with a guiding-sealing device, guiding-sealing device comprises a cock body and an end cap, the endoporus of cock body is provided with an annular trough body, the lower end of annular trough body is provided with guide ring, guide ring and described piston rod Spielpassung, the upper end of annular trough body is provided with flinger ring, this flinger ring and described piston rod suitable, the outside of cock body is provided with seal ring, oil sealing is provided with in described end cap and the suitable endoporus of piston rod.
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105003588A (en) * | 2015-06-17 | 2015-10-28 | 芜湖兴众进出口贸易有限公司 | Automobile collision magneto-rheological shock absorber |
| CN108468739B (en) * | 2018-05-30 | 2024-06-04 | 浙江科技学院 | Cylinder ring type damping adjustable hydraulic shock absorber |
| CN108691944B (en) * | 2018-06-18 | 2019-07-26 | 重庆大学 | Based on the asymmetric MR damper for squeezing enhancement effect |
| CN114364186B (en) * | 2022-03-16 | 2022-06-07 | 山西大学 | Rigid-flexible reverse rotation protection device of double-contradiction top-touch type electronic measurement and control instrument |
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| EP1669630A2 (en) * | 2000-03-29 | 2006-06-14 | Lord Corporation | Magnetically controlled friction damper |
| CN2816483Y (en) * | 2005-08-04 | 2006-09-13 | 浙江大学 | Minisize-automatic magnetic-current variation intelligent shock-adsorption device |
| CN1862050A (en) * | 2006-04-30 | 2006-11-15 | 重庆渝安创新科技(集团)有限公司 | Oil-gas dividing hydraulic damper for motor vehicle |
| CN101555923A (en) * | 2009-05-27 | 2009-10-14 | 陈蕊建 | Shock absorber piston assembly and self-adjusting damping shock absorber comprising same |
| CN101793302A (en) * | 2010-03-18 | 2010-08-04 | 河海大学 | Three-cylinder type large-capacity magneto-rheological damper |
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Patent Citations (6)
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| US4462013A (en) * | 1977-10-13 | 1984-07-24 | Minolta Camera Kabushiki Kaisha | Electromagnetic device with dust-tight enclosure |
| EP1669630A2 (en) * | 2000-03-29 | 2006-06-14 | Lord Corporation | Magnetically controlled friction damper |
| CN2816483Y (en) * | 2005-08-04 | 2006-09-13 | 浙江大学 | Minisize-automatic magnetic-current variation intelligent shock-adsorption device |
| CN1862050A (en) * | 2006-04-30 | 2006-11-15 | 重庆渝安创新科技(集团)有限公司 | Oil-gas dividing hydraulic damper for motor vehicle |
| CN101555923A (en) * | 2009-05-27 | 2009-10-14 | 陈蕊建 | Shock absorber piston assembly and self-adjusting damping shock absorber comprising same |
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Inventor after: Yang Likang Inventor after: Duan Fubin Inventor after: Zhang Zhiyi Inventor after: Qian Yunzhou Inventor after: Yue Xu Inventor before: Duan Fubin Inventor before: Yang Likang Inventor before: Zhang Zhiyi Inventor before: Duan Fubin, Yang Likang, Zhang Zhiyi, Qian Yunzhou |
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