CN103758911B - The magnetorheological hydro pneumatic suspension orifice valve of vehicle - Google Patents
The magnetorheological hydro pneumatic suspension orifice valve of vehicle Download PDFInfo
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- CN103758911B CN103758911B CN201410039202.7A CN201410039202A CN103758911B CN 103758911 B CN103758911 B CN 103758911B CN 201410039202 A CN201410039202 A CN 201410039202A CN 103758911 B CN103758911 B CN 103758911B
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Abstract
The present invention gives the magnetorheological hydro pneumatic suspension orifice valve of a kind of vehicle, have the valve body of cavity, mounting pipe and floating piston in comprising, valve body internal fixtion is placed with mounting pipe, is provided with inductor coil and wire winding rod in mounting pipe, inductor coil is wrapped in outside wire winding rod, and mounting pipe is provided with floating piston; Mounting pipe outer wall is provided with upper fixing element, middle fixed block and lower fixed block, floating piston is arranged between upper fixing element and middle fixed block, upper limit assembly is placed with between floating piston and upper fixing element, be placed with lower limit assembly between floating piston and middle fixed block, mounting pipe is also provided with fixed spool.Orifice valve and velocity transducer integrated, reliability is high.This external magnetorheological hydro-pneumatic suspension system orifice valve can automatic sensing wheel relative to the vibration velocity of vehicle body, and carry out the corresponding adjustment of damping according to the voltage swing that inductor coil produces.
Description
Technical field
The present invention relates to the damping member of auto magnetorheological hydro-pneumatic suspension system, particularly the magnetorheological hydro pneumatic suspension orifice valve of a kind of vehicle.
Background technique
Traditional hydro-pneumatic suspension system designs according to certain specific pavement behavior and travel condition of vehicle, its damping characteristic is nonadjustable, but because pavement conditions is complicated and changeable, the suspension system of fixing damping characteristic cannot according to its damping of the corresponding adjustment of state of pavement conditions and vehicle, when pavement conditions and vehicle-state exceed its design condition, the effectiveness in vibration suppression of suspension will reduce greatly, affect smoothness and the Security of vehicle.
Magnetorheological hydro pneumatic suspension is the characteristic utilizing the rheological properties of magnetic flow liquid can be controlled by externally-applied magnetic field, realize the control of damping constant, thus realize the control of damping force, when Vehicular vibration, the vehicle body that suspension system controller detects according to sensor and wheel relative movement situation make corresponding computing, produce a control signal, by current driver to field coil load driver electric current, to regulate magnetic intensity, thus change the yield stress size of magnetic flow liquid in magnetorheological hydro pneumatic suspension, reach the object of damping adjusting power, in this closed loop control system, vehicle body and wheel are the most important input objects of controller to movement velocity.
For current magnetorheological hydro pneumatic suspension, because the oil cylinder piston area of hydro pneumatic suspension is larger, therefore, can be very large by the fluid flow of orifice valve, when orifice valve is built-in, bad road when travelling will run into heat dissipation problem, the too high meeting of oil liquid temperature causes viscosity to reduce, have influence on the performance of gas in accumulator, and likely damage electromagnetic coil, thus have influence on the external characteristics of hydro pneumatic suspension, and in existing vehicle magneto-rheological vibration damping system, realize vehicle body and wheel has two kinds to movement velocity sensing mode, relative displacement mode and relative acceleration mode, relative displacement mode needs in vibration system, configure one or more displacement transducer, and relative acceleration mode needs to configure one or more acceleration transducer in vibration system, no matter adopt which kind of mode, independent sensors configured all can increase the cost of system, and sensor is directly exposed in external environment condition easily damaged, thus reduces the reliability of system.
The CN1593962A patent of invention first time that China announces discloses a kind of vehicle suspension vibration damper with relative velocity self-sensing function in advance, this invention is from vibration damper, utilize the characteristic of magnetorheological hydro pneumatic suspension, piston head is wound around a field coil, one inductor coil is installed in piston rod, when Vehicular vibration, there is corresponding change in the magnetic linkage of inductor coil, the relative velocity of voltage signal reflection vibration, controller does further adjustment according to the voltage signal of inductor coil to vibration damper, but, when road excitation is very large, can be very large by the fluid flow in piston damping hole, because piston is built-in, it is very fast that its temperature can rise, the field coil be integrated on piston easily damages, in addition the lead-in wire of field coil and inductor coil will shorten along with piston movement extends, lead-in wire is easily pulled off, this also can reduce the reliability of vibration damper, the CN101871502B patent of invention first time that China announces discloses a kind of external mechanical induction type adjustable damping valve of oil-gas suspension, this orifice valve is the device of the amplitude automatic damping adjusting according to road excitation, but it is Mechanical course, once after structure and parameter designs, damping characteristic cannot change, moreover its damping only has two-stage, the demand of various road conditions and vehicle-state well cannot be met.
Summary of the invention
Technical problem to be solved by this invention is to provide the magnetorheological hydro pneumatic suspension orifice valve of the high vehicle of a kind of reliability, the magnetorheological hydro pneumatic suspension orifice valve of this vehicle can according to the damping of vehicle body and wheel Relative Vibration speed adjustable suspension, and damping force is continuously adjustabe, realize the semi-active control of vibration system.
For solving the problems of the technologies described above, the invention provides the magnetorheological hydro pneumatic suspension orifice valve of a kind of vehicle, the valve body of cavity, mounting pipe and floating piston is had in comprising, valve body internal fixtion is placed with mounting pipe, inductor coil and wire winding rod is provided with in mounting pipe, inductor coil is wrapped in outside wire winding rod, and inductor coil two ends lead-in wire stretches out outside mounting pipe, and mounting pipe is provided with floating piston;
Mounting pipe outer wall is disposed with upper fixing element, middle fixed block and lower fixed block from top to bottom, floating piston is arranged between upper fixing element and middle fixed block, upper limit assembly is placed with between floating piston and upper fixing element, upper limit assembly at least comprises upper spring, be placed with lower limit assembly between floating piston and middle fixed block, lower limit assembly at least comprises lower spring;
Mounting pipe is also provided with fixed spool, and fixed spool is placed on position between middle fixed block and lower fixed block, has space between fixed spool and valve interior wall;
Cavity in valve body is divided into epicoele, lumen and cavity of resorption by floating piston and fixed spool, epicoele sidewall has the accumulator communicated with the external world, cavity of resorption sidewall has the oil cylinder interface communicated with the external world;
Described fixed spool comprises platen, field coil, housing and insulating bush, and housing sidewall top has coil recess, and field coil is wrapped in coil recess, and outside coil recess, cover has insulating bush, and upper platen is fixed on housing upper-end surface;
Fairlead runs through fixed spool and mounting pipe, and the two ends lead-in wire of field coil is stretched out outside mounting pipe by fairlead.
Technology contents for a better understanding of the present invention, below by magnetorheological for this vehicle hydro pneumatic suspension orifice valve referred to as this orifice valve.
After adopting such structure, when the upper and lower motion of wheel, under the promotion of magnetic flow liquid, floating piston slides up and down along mounting pipe; The movement velocity of floating piston reflects the movement velocity of wheel relative to vehicle body, is limited the relative position of floating piston by upper limit assembly and lower limit assembly, makes floating piston stop automatically returning to state of equilibrium when beating at wheel;
During work, field coil produces magnetic field, an Operating In Persistent Current Mode magnetic circuit is formed between fixed spool and floating piston, the magnetic field overwhelming majority magnetic flux that field coil produces is by this magnetic circuit, form the main flux of working sensor, inductor coil produces a same frequency alternating voltage signal, because the main flux of Operating In Persistent Current Mode magnetic circuit is constant, when road excitation, relative movement is there is between wheel and vehicle body, floating piston moves up and down along mounting pipe, the coil turn of inductor coil in Operating In Persistent Current Mode magnetic circuit is correspondingly changed, inductor coil two ends induction generation one voltage signal, this voltage signal comprises the information of vibration velocity size, the voltage signal of inductor coil is gone between by inductor coil and draws, thus realize vibration velocity sensing.
Fixed spool is placed between middle fixed block and lower fixed block, and the position of fixed spool is fixed, and avoids the lead-in wire of field coil to pull, and strengthens reliability;
This orifice valve is integrated with velocity transducer, avoid sensor and be directly exposed in severe external environment, therefore reliability is high.This external magnetorheological hydro-pneumatic suspension system orifice valve can automatic sensing wheel relative to the vibration velocity of vehicle body, and carry out the corresponding adjustment of damping according to the voltage swing that inductor coil produces, thus realize the semi-active control of hydro pneumatic suspension.
This orifice valve have external diameter compared with little, damping force is large, required voltage is low and consume energy little, and external assembling be convenient to heat radiation.
The housing of the floating piston of this orifice valve, wire winding rod and fixed spool all adopts high permeability material to make; The upper platen of fixed spool adopts extremely low permeability magnetic material to make; The upper and lower end face of described valve body adopts extremely low permeability magnetic material to make, and the sidewall of valve body adopts high permeability material to make.
After adopting such structure, input signal is gone between by field coil and sends into field coil, and now field coil produces alternating magnetic field, is convenient to form Operating In Persistent Current Mode magnetic circuit in fixed spool, valve body, floating piston, mounting pipe, wire winding rod.
The lead-in wire of the field coil of this orifice valve and the lead-in wire of inductor coil scribble sealing compound, and the upper and lower two ends of inductor coil are respectively arranged with insulation rubber seal; After adopting such structure, the lead-in wire of field coil and the lead-in wire of inductor coil and outer member is prevented to be short-circuited.
The upper limit assembly of this orifice valve also comprises the upper spring cover be enclosed within outside mounting pipe and the upper spring seat be enclosed within outside mounting pipe, and upper spring is placed between upper spring cover and upper spring seat; Described lower limit assembly also comprises the lower spring cover be enclosed within outside mounting pipe and the lower spring cup be enclosed within outside mounting pipe, and lower spring is placed between lower spring cover and lower spring cup; When adopting this structure, the more reasonable structure of upper limit assembly and lower limit assembly.
The upper fixing element of this orifice valve is made up of the upper snap ring coordinated with mounting pipe and upper back-up ring; Described middle fixed block is the outer bulge loop of mounting pipe outer wall; Described lower fixed block is made up of the lower snap ring coordinated with mounting pipe and lower back-up ring; When adopting this structure, the more reasonable structure of upper fixing element, middle fixed block and lower fixed block.
Accompanying drawing explanation
Fig. 1 is the structural representation of this orifice valve embodiment.
Fig. 2 is the A portion enlarged view of Fig. 1.
Fig. 3 is the using state figure of this orifice valve embodiment.
Fig. 4 is the electrical installation schematic diagram of this orifice valve embodiment.
Embodiment
As shown in Fig. 1 to 2
This orifice valve comprises valve body 1, mounting pipe 2, floating piston 5, upper limit assembly, lower limit assembly, upper fixing element, fixed spool 8 and lower fixed block.
Valve body 1 comprises upper cover plate 1a, sleeve 1b and lower cover plate 1c, is provided with seal ring 1d between upper cover plate 1a and sleeve 1b, is provided with seal ring 1d equally between lower cover plate 1c with sleeve 1b, and upper cover plate 1a and lower cover plate 1c adopts extremely low permeability magnetic material to make; Sleeve 1b adopts high permeability material to make.
Mounting pipe 2 is fixed with between upper cover plate 1a and lower cover plate 1c, inductor coil 2a and wire winding rod 2b is provided with in mounting pipe 2, inductor coil 2a is wrapped in outside wire winding rod 2b, the upper and lower two ends of inductor coil 2a are respectively arranged with insulation rubber seal 2c, and inductor coil 2a two ends inductor coil lead-in wire 2d stretches out outside valve body 1 through upper cover plate 1a, the inductor coil lead-in wire 2d of inductor coil 2a scribbles sealing compound, and wire winding rod 2b adopts high permeability material to make; Mounting pipe 2 outer wall is distributed with jump ring groove, outer bulge loop 2e and lower circlip groove from top to bottom successively.
Upper fixing element is made up of upper snap ring 3a and upper back-up ring 3b, the upper jump ring groove fit of upper snap ring 3a and mounting pipe 2; Lower fixed block is made up of lower snap ring 4a and lower back-up ring 4b, the lower circlip groove fit of lower snap ring 4a and mounting pipe 2.
Mounting pipe 2 is provided with floating piston 5, and floating piston 5 is arranged between upper fixing element and outer bulge loop 2e, floating piston 5 can move along the axial direction of mounting pipe 2, and floating piston 5 adopts high permeability material to make.
Upper limit assembly is placed with between floating piston 5 and upper fixing element, upper limit assembly comprises the upper spring cover 6a be enclosed within outside the mounting pipe 2 and upper spring seat 6b be enclosed within outside mounting pipe 2, upper spring 6c is placed between upper spring cover 6a and upper spring seat 6b, the upper-end surface of upper spring cover 6a is resisted against the upper back-up ring 3b of upper fixing element, and the lower end surface of upper spring seat 6b is resisted against on floating piston 5.
Lower limit assembly is placed with between floating piston 5 and outer bulge loop 2e, lower limit assembly comprises the lower spring cover 7a be enclosed within outside the mounting pipe 2 and lower spring cup 7b be enclosed within outside mounting pipe 2, lower spring 7c is placed between lower spring cover 7a and lower spring cup 7b, the lower end surface of lower spring cover 7a is resisted against on outer bulge loop 2e, and the upper-end surface of lower spring cup 7b is resisted against on floating piston 5.
Mounting pipe 2 is also provided with fixed spool 8, and fixed spool 8 is placed on position between outer bulge loop 2e and lower fixed block, between fixed spool 8 outer wall and valve body 1 inwall, has liquid chunnel 9, fixed spool 8 comprises platen 8a, field coil 8b, housing 8c, pressing disc 8d and insulating bush 8f, housing 8c side wall upper part has coil recess, field coil 8b is wrapped in coil recess, and cover has insulating bush 8f outside coil recess, upper platen 8a is fixed on housing 8c upper-end surface, the upper-end surface of upper platen 8a is resisted against on outer bulge loop 2e, pressing disc 8d is fixed on the lower end surface of housing 8c, the lower end surface of pressing disc 8d is resisted against the lower back-up ring 4b of lower fixed block, housing 8c adopts high permeability material to make, upper platen 8a adopts extremely low permeability magnetic material to make, fairlead 8h runs through the housing 8c of fixed spool 8, pressing disc 8d and mounting pipe 2, the two ends field coil lead-in wire 8j of field coil 8b stretches out outside mounting pipe 2 by fairlead 8h, the field coil lead-in wire 8j of field coil 8b is each passed through fairlead 8h, mounting pipe 2 and upper cover plate 1a stretch out outside valve body 1, the field coil lead-in wire 8j of field coil 8b scribbles sealing compound.
Cavity in valve body 1 is divided into epicoele 10, lumen 11 and cavity of resorption 12 by floating piston 5 and fixed spool 8, epicoele 10, lumen 11 and cavity of resorption 12 are all filled with magnetic flow liquid, epicoele 10 sidewall has the accumulator 1f communicated with the external world, the position of accumulator 1f is in the upside of floating piston 5 in upwards maximum displacement place, cavity of resorption 12 sidewall has the oil cylinder interface 1g communicated with the external world, mutually close between epicoele 10 and lumen 11, be interconnected by liquid chunnel 9 between lumen 11 and cavity of resorption 12.
As shown in Figs. 3-4
During use, be connected with Out let 15 by the inductor coil of inductor coil 2a lead-in wire 2d, Out let 15 is communicated with peripheral control unit 20 by signal pre-processing circuit 19; The field coil lead-in wire 8j of field coil 8b is connected with excitation source 16.
This orifice valve is between accumulator 13 and oil cylinder 14, is communicated with accumulator 13 by accumulator 1f, is communicated with oil cylinder 14 by oil cylinder interface 1g, the confining liquid circulation flow path of composition hydro-pneumatic suspension system.
Magnetic flow liquid in this orifice valve is separated by floating piston 5, and when wheel moves up and down, under the promotion of magnetic flow liquid, floating piston 5 slides up and down along mounting pipe 2, and therefore, the movement velocity of floating piston 5 reflects the movement velocity of wheel relative to vehicle body.
When wheel moves up and down, magnetic flow liquid, by fixed spool 8 liquid chunnel 9, produces damping force, when fixed spool 8 liquid chunnel 9 has externally-applied magnetic field effect, magnetic flow liquid " solidification " in fixed spool 8 liquid chunnel 9, magnetic flow liquid generation viscoplastic flow, makes damping force increase; The size of damping force is relevant with externally-applied magnetic field size, and externally-applied magnetic field size is relevant with size of current in field coil 8b, the damping force size therefore by regulating the electric current in field coil 8b can change this orifice valve.
Upper cover plate 1a, lower cover plate 1c and upper platen 8a are extremely low permeability magnetic material and process, and sleeve 1b, floating piston 5, fixed spool 8 and wire winding rod 2b are processed by high permeability material, and mounting pipe 2 is processed by low permeability magnetic material.
Signal generator 18 produces a sinusoidal alternating voltage detection signal, and this testing signal is as a part for excitation source 16 input signal, and send into field coil 8b by field coil lead-in wire 8j, now field coil 8b produces a same frequency alternating magnetic field; An Operating In Persistent Current Mode magnetic circuit 17 is formed in fixed spool 8, liquid chunnel 9, sleeve 1b, floating piston 5, mounting pipe 2, wire winding rod 2b, the magnetic field overwhelming majority magnetic flux that field coil 8b produces is by this magnetic circuit, form the main flux of working sensor, inductor coil 2a produces a same frequency alternating voltage signal.
Because the main flux of Operating In Persistent Current Mode magnetic circuit 17 is constant, when road excitation, relative movement is there is between wheel and vehicle body, floating piston 5 moves up and down along mounting pipe 2, the coil turn of inductor coil 2a in Operating In Persistent Current Mode magnetic circuit 17 is correspondingly changed, inductor coil 2a two ends induction generation one voltage signal, this voltage signal comprises the information of vibration velocity size, the voltage signal of inductor coil 2a is drawn by inductor coil lead-in wire 2d, be input to signal pre-processing circuit 19, send into peripheral control unit 20, thus realize vibration velocity sensing.
Simultaneously, the vibration velocity size information that peripheral control unit 20 senses according to inductor coil 2a, after carrying out corresponding computing, control signal be converted to analogue signal and send into drive circuit 21, drive circuit 21 produces a corresponding electric current, and synthesized, as the excitation source 16 of field coil 8b by the testing signal that addition coupling circuit 22 and signal generator 18 produce; By the magnetic intensity regulating the size of current of drive circuit 21 change field coil 8b to produce, this magnetic field is high magnetic fields, thus changes the damping ratio of liquid chunnel 9 place magnetic flow liquid, realizes the automatic adjustable function of damping.
This invention by orifice valve and velocity transducer integrated, avoids sensor and be directly exposed in severe external environment, therefore reliability is high; This external magnetorheological hydro-pneumatic suspension system orifice valve can automatic sensing wheel relative to the vibration velocity of vehicle body, and carry out the corresponding adjustment of damping according to the voltage swing that inductor coil 2a produces, thus realize the semi-active control of hydro pneumatic suspension.
Above-mentioned high permeability material (i.e. soft magnetic material) selects commercially available stainless steel material usually; Above-mentioned extremely low permeability magnetic material (i.e. non-magnet_conductible material) selects commercially available aluminum material usually.
Above-described is only one embodiment of the present invention, it should be pointed out that for the person of ordinary skill of the art, under the premise without departing from the principles of the invention, can also make some modification and improvement, and these also should be considered as belonging to protection scope of the present invention.
Claims (5)
1. the magnetorheological hydro pneumatic suspension orifice valve of vehicle, the valve body of cavity, mounting pipe and floating piston is had in comprising, valve body internal fixtion is placed with mounting pipe, inductor coil and wire winding rod is provided with in mounting pipe, inductor coil is wrapped in outside wire winding rod, and inductor coil two ends lead-in wire stretches out outside mounting pipe, mounting pipe is provided with floating piston, it is characterized by:
Mounting pipe outer wall is disposed with upper fixing element, middle fixed block and lower fixed block from top to bottom, floating piston is arranged between upper fixing element and middle fixed block, upper limit assembly is placed with between floating piston and upper fixing element, upper limit assembly at least comprises upper spring, be placed with lower limit assembly between floating piston and middle fixed block, lower limit assembly at least comprises lower spring;
Mounting pipe is also provided with fixed spool, and fixed spool is placed on position between middle fixed block and lower fixed block, has space between fixed spool and valve interior wall;
Cavity in valve body is divided into epicoele, lumen and cavity of resorption by floating piston and fixed spool, epicoele sidewall has the accumulator communicated with the external world, cavity of resorption sidewall has the oil cylinder interface communicated with the external world;
Described fixed spool comprises platen, field coil, housing and insulating bush, and housing sidewall top has coil recess, and field coil is wrapped in coil recess, and outside coil recess, cover has insulating bush, and upper platen is fixed on housing upper-end surface;
Fairlead runs through fixed spool and mounting pipe, and the two ends lead-in wire of field coil is stretched out outside mounting pipe by fairlead.
2. the magnetorheological hydro pneumatic suspension orifice valve of vehicle according to claim 1, is characterized in that: the housing of described floating piston, wire winding rod and fixed spool all adopts high permeability material to make; The upper platen of fixed spool adopts non-magnet_conductible material to make; The upper and lower end face of described valve body adopts non-magnet_conductible material to make, and the sidewall of valve body adopts high permeability material to make.
3. the magnetorheological hydro pneumatic suspension orifice valve of vehicle according to claim 1, it is characterized in that: the lead-in wire of described field coil and the lead-in wire of inductor coil scribble sealing compound, the upper and lower two ends of inductor coil are respectively arranged with insulation rubber seal.
4. the magnetorheological hydro pneumatic suspension orifice valve of vehicle according to claim 1, it is characterized in that: described upper limit assembly also comprises the upper spring cover be enclosed within outside mounting pipe and the upper spring seat be enclosed within outside mounting pipe, and upper spring is placed between upper spring cover and upper spring seat; Described lower limit assembly also comprises the lower spring cover be enclosed within outside mounting pipe and the lower spring cup be enclosed within outside mounting pipe, and lower spring is placed between lower spring cover and lower spring cup.
5. the magnetorheological hydro pneumatic suspension orifice valve of vehicle according to claim 1, is characterized in that: described upper fixing element is made up of the upper snap ring coordinated with mounting pipe and upper back-up ring; Described middle fixed block is the outer bulge loop of mounting pipe outer wall; Described lower fixed block is made up of the lower snap ring coordinated with mounting pipe and lower back-up ring.
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| CN201410039202.7A CN103758911B (en) | 2014-01-27 | 2014-01-27 | The magnetorheological hydro pneumatic suspension orifice valve of vehicle |
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| CN201410039202.7A CN103758911B (en) | 2014-01-27 | 2014-01-27 | The magnetorheological hydro pneumatic suspension orifice valve of vehicle |
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| CN103758911B true CN103758911B (en) | 2016-02-10 |
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| CN107781345B (en) * | 2017-12-05 | 2023-12-12 | 华东交通大学 | Magnetorheological damper capable of detecting piston displacement |
| CN107882915B (en) * | 2017-12-13 | 2023-12-12 | 华东交通大学 | Integrated magneto-rheological damper with built-in distance sensor for displacement detection |
| CN112969601B (en) * | 2018-09-25 | 2023-12-01 | 日立安斯泰莫株式会社 | Suspension control device |
| CN109139775B (en) * | 2018-11-02 | 2024-02-27 | 浙江戈尔德智能悬架股份有限公司 | External damping regulating valve applied to automobile shock absorber |
| CN112392888B (en) * | 2020-11-11 | 2021-06-08 | 清华大学 | Magnetic liquid vibration damper |
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| GB400012A (en) * | 1931-12-19 | 1933-10-19 | Edmond Lombard | Improvements in the suspension of vehicles |
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