CN104948647A - Piston structure of magnetorheological damper - Google Patents
Piston structure of magnetorheological damper Download PDFInfo
- Publication number
- CN104948647A CN104948647A CN201510338967.5A CN201510338967A CN104948647A CN 104948647 A CN104948647 A CN 104948647A CN 201510338967 A CN201510338967 A CN 201510338967A CN 104948647 A CN104948647 A CN 104948647A
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- China
- Prior art keywords
- piston rod
- piston
- vibration damper
- magneto
- described piston
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
- F16F9/3214—Constructional features of pistons
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/53—Means for adjusting damping characteristics by varying fluid viscosity, e.g. electromagnetically
Abstract
The invention discloses a piston structure of a magnetorheological damper. The piston structure of the magnetorheological damper substantially comprises a piston rod and a piston assembly, wherein a piston rod fixed cavity is arranged on the rear end of the piston assembly, the piston rod is detachably connected with the piston assembly after being inserted into the piston rod fixed cavity, the piston assembly comprises a piston body and a coil protective shell, a coil is wound on the piston body, the coil protective shell is sleeved on the outer side of the piston body, a coil is connected with a control system which is arranged outside a damper through a signal wire, a fixed mechanism is arranged on the rear end of the piston rod, and the piston structure is fixed in the damper through the fixed mechanism. The piston structure can not generate sport wear and damage in the damper, can prolong the whole service lie of the piston structure of the magnetorheological damper. A magnetic field of the coil changes flow characteristics of magnetorheological damping liquid, enables the magnetorheological damping liquid to generate damping force with rapid reaction and strong controllability, and can adjust the damping force in stepless.
Description
Technical field
The present invention relates to a kind of parts of vibration damper, more specifically to a kind of piston structure of magneto-rheological vibration damper.
Background technique
Current domestic automobile extensive use be traditional passive suspension shock-absorber, the damping constant of this vibration damper and spring rate are changeless, can not play good damping effect; And Active suspension can obtain a desirable vibrating isolation system, the Suspension control target of realizing ideal in theory, but its power consumption is large, cost is high, and complex structure; Cartridge type magneto-rheological vibration damper in semi-active suspension effectively solves the travelling comfort of passive suspension existence and the contradiction of stability, performance simultaneously also close to Active suspension on control effects, and structure is simple, price is relatively cheap, again without the need to providing the extra energy and multiple damping force can being produced, the stability of travelling comfort and the manipulation taken can better be taken into account under multi-operating mode.In cartridge type magneto-rheological vibration damper in these semi-active suspensions, its piston structure is critical component.Existing piston structure is generally hydraulic-valve type, and during work, piston structure is about the inside of vibration damper or move up and down, and this mode not only makes energy consumption increase, and can cause wearing and tearing and the damage of vibration damper inside, affects the working life of vibration damper entirety.
Summary of the invention
The object of the invention is the shortcoming overcoming above-mentioned technology, a kind of piston structure be applied in cartridge type magneto-rheological vibration damper is provided, this piston structure can not produce motion wearing and tearing and damage in the inside of vibration damper, the working life of vibration damper entirety can be extended, and the damping force of this vibration damper can be made stepless adjustable.
Magneto-rheological vibration damper utilizes inductive reaction, to be input as basis from monitoring wheel and body movement sensor signal, real time reaction is made to road conditions and driving environment, this control system is with the structure of economic reliability components, provide damping force that is quick, smooth-going, continuous variable, decrease the vibration of vehicle body and add the adhesion on wheel and various road surface, also cushioned the recoil force suffered by wheel simultaneously, thus at utmost improve the stability of vehicle operating, increase the Security of driving and the level of comfort taken.
Magneto-rheological vibration damping liquid is a kind of magnetic-particle mixed solution mixed by high magnetic permeability, low hysteresis molecule and non-magnetic liquid (silicone oil or mineral oil); this liquid is without presenting low viscous characteristic under magnetic field condition; under the effect of high magnetic fields, then can present the fluid characteristics of high viscosity lazy flow, magnetic power is that the signal provided by control system changes size of current decision.This stream becomes the continuous variable that controllability could realize damping force just, thus realizes the object to the ACTIVE CONTROL of vibration damper.Be injected into the electromagnetic coil in damper piston when liquid after, the magnetic field of coil, by changing the flow characteristic of magneto-rheological vibration damping liquid, makes it produce to be swift in response, damping force that controllability is strong.In the structure composition of vibration damper, piston structure often plays very crucial effect.
The technological scheme that technical solution problem of the present invention adopts is: a kind of piston structure of magneto-rheological vibration damper, described piston structure mainly comprises piston rod and piston assembly, the rear end of described piston assembly is provided with piston rod lock chamber, described piston rod insert after described piston rod lock chamber with described piston assembly detachable connection; Described piston assembly comprises the piston body being wound with coil and the coil protect shell being sheathed on described piston body periphery; Described coil is connected by the control system of signaling line with vibration damper outside; The rear end of described piston rod is provided with fixed mechanism, and described piston structure is fixed on the inside of vibration damper by described fixed mechanism.
Further, described piston body is provided with some winding groove for coiling, is all wound with 50 turn coil in each described winding groove; Described coil is enameled cable, and the diameter of described enameled cable is 0.5mm.
For the further restriction of described coil, in the gap of described coil, scribble insulating oil-resisting colloid.
For the further optimization of described piston body structure, the two ends of described piston body are equipped with and compress flowing valve pad, be wherein that tailpiece of the piston rod compresses flowing valve pad near one end of described piston rod, the one end away from described piston rod is the tight flowing valve pad of non-piston rod side pressure; Described tailpiece of the piston rod compresses flowing valve pad and described non-piston rod side pressure tight flowing valve pad is all wrapped by the flange of described coil protect shell.
Further, the rear end that described tailpiece of the piston rod compresses flowing valve pad is provided with that buffering block is gentle rushes block successively, and the described buffering block middle part rushing block of easing up is equipped with the mounting hole that can pass for described piston rod.
Further, the one end be connected with described piston rod lock chamber in described piston rod is provided with jump-ring slot, is provided with jump ring in described jump-ring slot, and described piston rod is connected with described piston rod lock chamber by jump ring.
Further, the front end of described jump-ring slot is provided with rod seal circle, and described rod seal circle is be close to described piston rod lock chamber to arrange.
Further, described piston rod is hollow piston rod, is provided with the passage that can pass for signaling line in described hollow piston rod; The front end of described signaling line is connected with described piston coils, is connected after the rear end of described signaling line passes piston rod with control system.
Further, the fixed mechanism of described piston rod rear end comprises locking nut and pad; Described piston rod, through after the fixed support in vibration damper, is fixed on fixed support by locking nut; Pad is provided with between described locking nut and fixed support.
Further, anaerobic adhesive is scribbled between described locking nut and described piston rod.
The invention has the beneficial effects as follows: compared with prior art, magneto-rheological vibration damper piston structure provided by the invention has following advantage:
(1) damper piston structure provided by the invention can not produce motion wearing and tearing and damage in the inside of vibration damper, can extend the working life of vibration damper entirety;
(2) runnability of wheel is after the signal metering-in control system that sensor provides, by control system, signal is converted to (0-12V) electric signal transmission on the coil of vibration damper inside, the magnetic field of coil will change the flow characteristic of magneto-rheological vibration damping liquid, make it produce to be swift in response, damping force that controllability is strong, and damping force can step-less adjustment; Thus the impact force from road surface be subject in reduction vehicle operation, improve the security and stability of travelling comfort and the driving taken, also extend the working life of car load simultaneously;
(3) damper structure provided by the invention is simple, and manufacture cost is not high, and without the vibratory impulse of hydrovalve and noise, does not need complicated driving mechanism and high-octane consumption.
Accompanying drawing explanation
Fig. 1 is the piston structure schematic diagram of magneto-rheological vibration damper provided by the invention.
Fig. 2 is the concrete installation design sketch of the piston structure provided of the present invention in vibration damper.
Wherein, the tight flowing valve pad of 1-non-piston rod side pressure; 2-winding groove; 3-coil protect shell; 4-piston body; 5-tailpiece of the piston rod compresses flowing valve pad; 6-cushions block; 7-buffer stopper; 8-piston rod; 9-pad; 10-locking nut; 11-signaling line; 12-jump ring; 13-rod seal circle; 14-piston rod lock chamber; 15-connecting rod; 16-pressurized gas; 17-inner core; 18-magnetic rheological liquid; 19-urceolus; 20-leads oil sealing; 21-oil pipe fixed support; 22-fixed support.
Embodiment
Below in conjunction with the drawings and specific embodiments, illustrate the present invention further, following embodiment should be understood and be only not used in for illustration of the present invention and limit the scope of the invention.It should be noted that, the word "front", "rear" of use is described below, "left", "right", "up" and "down" refer to direction in accompanying drawing, word " interior " and " outward " refer to the direction towards or away from particular elements geometrical center respectively.
Embodiment
Magneto-rheological vibration damper utilizes inductive reaction, to be input as basis from monitoring wheel and body movement sensor signal, real time reaction is made to road conditions and driving environment, this control system is with the structure of economic reliability components, provide damping force that is quick, smooth-going, continuous variable, decrease the vibration of vehicle body and add the adhesion on wheel and various road surface, also cushioned the recoil force suffered by wheel simultaneously, thus at utmost improve the stability of vehicle operating, increase the Security of driving and the level of comfort taken.
Magneto-rheological vibration damping liquid is a kind of magnetic-particle mixed solution mixed by high magnetic permeability, low hysteresis molecule and non-magnetic liquid (silicone oil or mineral oil); this liquid is without presenting low viscous characteristic under magnetic field condition; under the effect of high magnetic fields, then can present the fluid characteristics of high viscosity lazy flow, magnetic power is that the signal provided by control system changes size of current decision.This stream becomes the continuous variable that controllability could realize damping force just, thus realizes the object to the ACTIVE CONTROL of vibration damper.Be injected into the electromagnetic coil in damper piston when liquid after, the magnetic field of coil, by changing the flow characteristic of magneto-rheological vibration damping liquid, makes it produce to be swift in response, damping force that controllability is strong.In the structure composition of vibration damper, piston structure often plays very crucial effect.
As shown in Figure 1, a kind of piston structure of magneto-rheological vibration damper, described piston structure mainly comprises piston rod 8 and piston assembly, and the rear end of described piston assembly is provided with piston rod lock chamber 14, described piston rod 8 insert after described piston rod lock chamber 14 with described piston assembly detachable connection; Described piston assembly comprises the piston body 4 being wound with coil and the coil protect shell 3 being sheathed on described piston body 4 periphery; Described coil is connected with the control system of vibration damper outside by signaling line 11; The rear end of described piston rod 8 is provided with fixed mechanism, and described piston structure is fixed on the inside of vibration damper by described fixed mechanism.
Described piston body 4 is provided with some winding groove 2 for coiling, is all wound with 50 turn coil in each described winding groove 2; Described coil is enameled cable, and the diameter of described enameled cable is 0.5mm.Insulating oil-resisting colloid is scribbled in the gap of described coil.
The two ends of described piston body 4 are equipped with and compress flowing valve pad, and be wherein that tailpiece of the piston rod compresses flowing valve pad 5 near one end of described piston rod 8, the one end away from described piston rod 8 is the tight flowing valve pad 1 of non-piston rod side pressure; Described tailpiece of the piston rod compresses flowing valve pad 5 and described non-piston rod side pressure tight flowing valve pad 1 is all wrapped by the flange of described coil protect shell 3.The rear end that described tailpiece of the piston rod compresses flowing valve pad 5 is provided with buffering block 6 and buffer stopper 7 successively, and the middle part of described buffering block 6 and buffer stopper 7 is equipped with the mounting hole that can pass for described piston rod 8.
The one end be connected with described piston rod lock chamber 14 in described piston rod 8 is provided with jump-ring slot, is provided with jump ring 12 in described jump-ring slot, and described piston rod 8 is connected with described piston rod lock chamber 14 by jump ring 12.The front end of described jump-ring slot is provided with rod seal circle 13, and described rod seal circle 13 is arranged for being close to described piston rod lock chamber 14.
Described piston rod 8 is hollow piston rod, is provided with the passage that can pass for signaling line 11 in described hollow piston rod; The front end of described signaling line 11 is connected with described piston coils, is connected after the rear end of described signaling line 11 passes piston rod 8 with control system.
The fixed mechanism of described piston rod 8 rear end comprises locking nut 10 and pad 9; Described piston rod 8, through after the fixed support 22 in vibration damper, is fixed on fixed support 22 by locking nut 10; Pad 9 is provided with between described locking nut 10 and fixed support 22.Anaerobic adhesive is scribbled between described locking nut 10 and described piston rod 8.
As shown in Figure 2, the inner core 17 generally piston structure being installed on vibration damper is inner, in inner core 17, inject appropriate magnetic rheological liquid 18, and after making piston-rod assembly be inserted into inner core 17, liquid side is about 50mm apart from nose end; Then guiding oil sealing 20 is penetrated piston rod 8 to be press fit into after in inner core 17 and carry out flanging seal; The pressurized gas 16 of 1.2MPa are filled with again in inner core 17.Then inner core 17 is put in urceolus 19, and makes the rear end of hollow piston rod through the fixed hole in the middle part of the fixed support 22 of described piston rod 8, be fixed on fixed support 22 by pad 9, locking nut 10, described locking nut 10 scribbles anaerobic adhesive.Then, the signaling line 11 that box type piston rod port passes is connected with the signal source terminal that control system provides.By the connecting rod 15 of inner core 17 front end and the oil pipe fixed support 21 of urceolus 19 outside, vibration damper is installed on vehicle, vehicle is in running, the runnability of wheel is after the signal metering-in control system that sensor provides, by control system, signal is converted to electric signal transmission on the coil of vibration damper inside, by the variable magnetic field produced after coil electricity to change the fluid viscosity in vibration damper running, thus make vibration damper present different damping forces, the impact force from road surface be subject in vehicle operation is cut down with this, and then improve the security and stability of travelling comfort and the driving taken in vehicle operation, also extend the working life of car load simultaneously.
The magneto-rheological vibration damper piston structure provided in the present embodiment has following advantage:
(1) damper piston structure provided by the invention can not produce motion wearing and tearing and damage in the inside of vibration damper, can extend the working life of vibration damper entirety;
(2) runnability of wheel is after the signal metering-in control system that sensor provides, by control system, signal is converted to (0-12V) electric signal transmission on the coil of vibration damper inside, the magnetic field of coil will change the flow characteristic of magneto-rheological vibration damping liquid, make it produce to be swift in response, damping force that controllability is strong, and damping force can step-less adjustment; Thus the impact force from road surface be subject in reduction vehicle operation, improve the security and stability of travelling comfort and the driving taken, also extend the working life of car load simultaneously;
(3) damper structure provided by the invention is simple, and manufacture cost is not high, and without the vibratory impulse of hydrovalve and noise, does not need complicated driving mechanism and high-octane consumption.
Above mode of execution is only for illustration of the present invention; and be not limitation of the present invention; the those of ordinary skill of relevant technical field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all equivalent technological schemes also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (10)
1. the piston structure of a magneto-rheological vibration damper, it is characterized in that: described piston structure mainly comprises piston rod and piston assembly, the rear end of described piston assembly is provided with piston rod lock chamber, described piston rod insert after described piston rod lock chamber with described piston assembly detachable connection; Described piston assembly comprises the piston body being wound with coil and the coil protect shell being sheathed on described piston body periphery; Described coil is connected by the control system of signaling line with vibration damper outside; The rear end of described piston rod is provided with fixed mechanism, and described piston structure is fixed on the inside of vibration damper by described fixed mechanism.
2. the piston structure of a kind of magneto-rheological vibration damper according to claim 1, is characterized in that: described piston body is provided with some winding groove for coiling, is all wound with 50 turn coil in each described winding groove; Described coil is enameled cable, and the diameter of described enameled cable is 0.5mm.
3. the piston structure of a kind of magneto-rheological vibration damper according to claim 2, is characterized in that: scribble insulating oil-resisting colloid in the gap of described coil.
4. the piston structure of a kind of magneto-rheological vibration damper according to claim 1, it is characterized in that: the two ends of described piston body are equipped with and compress flowing valve pad, be wherein that tailpiece of the piston rod compresses flowing valve pad near one end of described piston rod, the one end away from described piston rod is the tight flowing valve pad of non-piston rod side pressure; Described tailpiece of the piston rod compresses flowing valve pad and described non-piston rod side pressure tight flowing valve pad is all wrapped by the flange of described coil protect shell.
5. the piston structure of a kind of magneto-rheological vibration damper according to claim 4, it is characterized in that: the rear end that described tailpiece of the piston rod compresses flowing valve pad is provided with that buffering block is gentle rushes block successively, the described buffering block middle part rushing block of easing up is equipped with the mounting hole that can pass for described piston rod.
6. the piston structure of a kind of magneto-rheological vibration damper according to claim 1, it is characterized in that: the one end be connected with described piston rod lock chamber in described piston rod is provided with jump-ring slot, be provided with jump ring in described jump-ring slot, described piston rod is connected with described piston rod lock chamber by jump ring.
7. the piston structure of a kind of magneto-rheological vibration damper according to claim 6, is characterized in that: the front end of described jump-ring slot is provided with rod seal circle, and described rod seal circle is be close to described piston rod lock chamber to arrange.
8. the piston structure of a kind of magneto-rheological vibration damper according to claim 1, is characterized in that: described piston rod is hollow piston rod, is provided with the passage that can pass for signaling line in described hollow piston rod; The front end of described signaling line is connected with described piston coils, is connected after the rear end of described signaling line passes piston rod with control system.
9. the piston structure of a kind of magneto-rheological vibration damper according to claim 1, is characterized in that: the fixed mechanism of described piston rod rear end comprises locking nut and pad; Described piston rod, through after the fixed support in vibration damper, is fixed on fixed support by locking nut; Pad is provided with between described locking nut and fixed support.
10. the piston structure of a kind of magneto-rheological vibration damper according to claim 9, is characterized in that: scribble anaerobic adhesive between described locking nut and described piston rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510338967.5A CN104948647A (en) | 2015-06-17 | 2015-06-17 | Piston structure of magnetorheological damper |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510338967.5A CN104948647A (en) | 2015-06-17 | 2015-06-17 | Piston structure of magnetorheological damper |
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| CN104948647A true CN104948647A (en) | 2015-09-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510338967.5A Pending CN104948647A (en) | 2015-06-17 | 2015-06-17 | Piston structure of magnetorheological damper |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113757297A (en) * | 2021-09-09 | 2021-12-07 | 重庆交通大学 | Magnetorheological damper based on U-shaped coil |
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2015
- 2015-06-17 CN CN201510338967.5A patent/CN104948647A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113757297A (en) * | 2021-09-09 | 2021-12-07 | 重庆交通大学 | Magnetorheological damper based on U-shaped coil |
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Application publication date: 20150930 |