CN108533665B - Magnetorheological damper capable of quickly redispersing and settling particles - Google Patents
Magnetorheological damper capable of quickly redispersing and settling particles Download PDFInfo
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- CN108533665B CN108533665B CN201810565665.5A CN201810565665A CN108533665B CN 108533665 B CN108533665 B CN 108533665B CN 201810565665 A CN201810565665 A CN 201810565665A CN 108533665 B CN108533665 B CN 108533665B
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- piston rod
- valve
- working cylinder
- shock absorber
- guide
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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
- F16F9/535—Magnetorheological [MR] fluid dampers
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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
- F16F9/34—Special valve constructions; Shape or construction of throttling passages
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid-Damping Devices (AREA)
- Soft Magnetic Materials (AREA)
Abstract
The invention discloses a magneto-rheological damper capable of quickly redispersing and settling particles, which comprises: a guide seat and a support seat; the one-way bottom valve is arranged on the supporting seat; a one-way valve disposed on the rod guide for effecting stroke-related switching by movement of the piston, wherein the one-way valve comprises: a guide belt; the sliding ring is arranged on the piston rod through the guide belt, so that under the action of friction force between the guide belt and the piston rod, the sliding ring can move along with the piston rod; the through hole is formed in the guide seat and communicated with the compensation chamber, when the shock absorber is in compression, the through hole is opened, oil in the upper cavity of the working cylinder enters the compensation chamber under the extrusion of the piston rod, when the shock absorber is in a stretching stroke, the slip ring moves along with the piston rod to close the through hole, the pressure in the compensation chamber is higher than that in the lower cavity of the working cylinder, the compensation oil enters the working cylinder through the one-way bottom valve, and fluid impacts, stirs and settles particles in the lower cavity and dilutes liquid in the lower cavity. The shock absorber eliminates the sedimentation influence; and meanwhile, the heat dissipation performance of the double-tube shock absorber is improved.
Description
Technical Field
The invention relates to the technical field of vehicle engineering, in particular to a magnetorheological damper capable of quickly redispersing and settling particles.
Background
The magneto-rheological semi-active suspension is the main development direction of the advanced suspension, and a large number of tests are carried out on off-road vehicles, particularly military vehicles. The magnetic rheological liquid is key material for the technology and consists of carbonyl iron powder, synthetic oil and other additives. Because the density difference among the components is large, the sedimentation and the delamination can not be avoided after the long-term standing. When the damping force is used for a vehicle suspension, the damping force of the shock absorber is unstable due to the sedimentation problem, and the shock absorption effect is influenced; damage to the dual tube shock absorber due to the blocked base valve is one of the major problems currently impeding the engineering of this technology.
Currently, the main solutions to the settling problem are: starting from material preparation, the sedimentation stability of the material is improved; starting from the structural design of the shock absorber, for example, a bottom valve is omitted, the shock absorber is reversely arranged, namely a piston rod is connected with a wheel, and the like. However, these measures also have an adverse effect: over-emphasis on settling stability sacrifices the shear stress of the magnetorheological fluid, and settling delamination is still unavoidable; the shock absorber needs to be charged with higher air pressure after the bottom valve is cancelled, so that the service life of the shock absorber is shortened, and the problem of unstable damping force cannot be solved; and the scheme that the piston rod is arranged below reduces the service life of the oil seal due to the action of iron powder abrasive particles in the magnetorheological fluid.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the invention aims to provide the magnetorheological damper capable of quickly redispersing and settling particles, which improves the shear stress, reduces the viscosity of the magnetorheological mother liquid, greatly improves the performance, ensures the stability of the damping and improves the damping capacity of the damper.
In order to achieve the above object, an embodiment of an aspect of the present invention provides a magnetorheological damper with rapidly redispersible settled particles, comprising: a guide seat and a support seat; a one-way base valve disposed on the support seat for reinforcing the compression valve into a safety valve to become a one-way valve such that the one-way base valve is completely in a closed state when the shock absorber is in compression, and a one-way valve disposed on the guide seat for performing a stroke-related switch by a piston movement, wherein the one-way valve includes: a guide belt; the sliding ring is arranged on the piston rod through the guide belt, so that under the action of friction force between the guide belt and the piston rod, the sliding ring can move along with the piston rod; the through hole set up in lead to compensation room department on the guide holder, with when the shock absorber is in the compression, the through hole is opened for the fluid of working cylinder epicoele is in the piston rod squeezes down and gets into the compensation room, and when the shock absorber is in tensile stroke, the sliding ring is along with the piston rod motion is in order to close the through hole, makes pressure in the compensation room is higher than the working cylinder cavity of resorption, and compensation fluid warp one-way bottom valve gets into the working cylinder, fluid impact, stirring cavity of resorption settlement granule and dilution cavity of resorption liquid.
The magnetorheological damper capable of rapidly redispersing the settling particles eliminates the influence caused by settling, and for the magnetorheological fluid, the requirement on settling property is reduced, so that the shear stress can be further improved, the viscosity of the magnetorheological fluid mother liquor is reduced, and the performance is greatly improved; for the magneto-rheological damper, the problem of blocking a bottom valve is eliminated, so that the magneto-rheological damper can be used for engineering; the liquid in the working cylinder keeps dynamic mixing evenly, the stability of damping is guaranteed, the heat dissipation problem of the double-cylinder shock absorber is improved through fluid circulation, the damping capacity of the shock absorber is improved, and the cross-country speed of a vehicle can be further improved.
In addition, the magnetorheological damper with the rapidly re-dispersible settled particles according to the embodiment of the invention can also have the following additional technical characteristics:
further, in one embodiment of the present invention, the one-way valve further comprises: and the limiting screw is used for limiting the displacement of the slip ring.
Further, in one embodiment of the invention, the one-way bottom valve is composed of a valve plate, a valve rod and a nut.
Further, in an embodiment of the present invention, the compensation oil forms a unidirectional circulation among the upper chamber of the working cylinder, the compensation chamber, and the lower chamber of the working cylinder in sequence, so as to continuously impact and stir the settled particles, thereby achieving dynamic and uniform mixing.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural view of a rapidly redispersible settled particulate magnetorheological damper according to one embodiment of the present invention;
FIG. 2 is a schematic diagram of the operation of a magnetorheological damper with rapidly redispersible settled particles according to one embodiment of the present invention.
Description of reference numerals:
the magnetorheological damper capable of quickly redispersing and settling particles comprises a magnetorheological damper 10, a guide seat 100, a support seat 200, a one-way bottom valve 300, a valve plate 310, a valve rod 320, a nut 330, a one-way valve 400, a guide belt 410, a sliding ring 420, a through hole 430, a limit screw 440, a piston rod 500, a compensation chamber 600, a working cylinder upper chamber 700, a working cylinder lower chamber 800, a working cylinder 900 and an oil storage cylinder 1000.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The magnetorheological damper capable of rapidly redispersing settled particles according to an embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a schematic structural diagram of a magnetorheological damper with rapidly redispersible settled particles according to one embodiment of the present invention.
As shown in fig. 1, the magnetorheological damper with quickly redispersible settled particles 10 comprises: guide 100, support 200, one-way base valve 300, and one-way valve 400.
Wherein, guide 100 and supporting seat 200. The check bottom valve 300 is disposed on the support seat for reinforcing the compression valve into a safety valve to become a check valve, so that the check bottom valve 300 is completely in a closed state when the shock absorber is compressed. The check valve 400 is provided on the rod guide 100 for stroke-related switching by piston movement, wherein the check valve 400 includes: guide strip 410, slip ring 420, through hole 430. Wherein the tape 410 is guided. The slip ring 420 is disposed on the piston rod 500 through the guide band 410, so that the slip ring 420 can move along with the piston rod 500 under the friction force between the guide band 410 and the piston rod 500. The through hole 430 is disposed on the guide seat 100 and communicated with the compensation chamber 600, so that when the shock absorber is in compression, the through hole 430 is opened, oil in the upper chamber 700 of the working cylinder is squeezed down by the piston rod row 500 and enters the compensation chamber 600, and when the shock absorber is in a stretching stroke, the slip ring 420 moves along with the piston rod 500 to close the through hole 430, so that the pressure in the compensation chamber 600 is higher than that in the lower chamber 800 of the working cylinder, the compensation oil enters the working cylinder 900 through the one-way bottom valve 300, and fluid impacts and stirs the settled particles in the lower chamber and dilutes the liquid in the.
Specifically, the shock absorber 10 of the embodiment of the present invention is composed of the check valve 400 and the check bottom valve 300, wherein the check valve 400 performs a stroke-related opening and closing using the movement of the piston rod 500, and the check bottom valve 300 reinforces the compression valve as a safety valve to become a check valve. The one-way valve 400 is designed on the guide base 100 and consists of a slide ring 420, a guide belt 410, a limit screw and a through hole 430 which is communicated with the compensation chamber 600 on the guide base 100. The slip ring 420 is mounted on the piston rod 500 by the guide band 410. The slip ring 420 is movable with the piston rod 500 by a frictional force between the guide band 410 and the piston rod 500. The through-hole 430 is opened when the shock absorber is in a compression stroke, and the through-hole 430 is closed in a tension stroke to ensure tension damping. The check bottom valve 300 compensates only for the extension stroke, and the compression plate is reinforced as a safety valve.
Further, in one embodiment of the present invention, the one-way valve 400 further comprises: a set screw 440. The limit screw 440 is used to limit the displacement of the slip ring 420.
Further, in one embodiment of the present invention, the check bottom valve 300 is composed of a valve plate 310, a valve stem 320, and a nut 330.
Further, in an embodiment of the present invention, the compensation oil forms a unidirectional circulation among the upper chamber 700 of the working cylinder, the compensation chamber 600, and the lower chamber 800 of the working cylinder in sequence, so as to continuously impact and stir the settled particles, thereby achieving dynamic and uniform mixing.
It can be understood that when a vehicle runs, oil in the shock absorber flows back and forth under the extrusion of the piston, the magnetorheological fluid in the working cylinder flows circularly by designing the one-way valve, and the liquid is kept to be dynamically and uniformly mixed by dispersing and settling particles. Specifically, the embodiment of the invention designs the one-way valve 400 and the one-way bottom valve 300 on the basis of the double-cylinder shock absorber, so that the oil separated out from the working cylinder 900 sequentially passes through the working cylinder upper cavity 700, the compensation chamber 600, the one-way bottom valve 300, the working cylinder lower cavity 800 and the damping valve in a form of compensation oil to form one-way circulation, thereby realizing redispersion and dynamic uniform mixing of sedimentation particles and eliminating sedimentation influence; meanwhile, the heat dissipation performance of the double-cylinder shock absorber is improved, so that the engineering application of the magnetorheological semi-active suspension technology is promoted.
Specifically, as shown in fig. 2, when the shock absorber is compressed, under the action of the friction force between the piston rod 500 and the guide belt 410, the sliding ring 420 moves along with the piston rod 500, the through hole 430 on the guide seat 100 is opened, and the oil in the upper chamber 700 of the working cylinder is displaced by the piston rod 500 and enters the compensation chamber 600, at which time the bottom valve is completely closed. Because the bottom valve is not used for realizing compression compensation, the phenomenon that the bottom valve is blocked by settled particles in the traditional magnetorheological shock absorber is eliminated.
When the shock absorber is in a stretching stroke, the sliding ring 420 closes the through hole 430 on the rod guide 100 along with the movement of the piston rod 500. At this time, the pressure in the compensation chamber 600 is higher than that in the working cylinder lower cavity 800, the compensation oil enters the working cylinder 900 through the one-way bottom valve 300, and the fluid impacts and stirs the particles settled in the working cylinder lower cavity 800 and dilutes the liquid in the working cylinder lower cavity 800. According to the embodiment of the invention, the vibration energy of the vehicle and the circulating fluid are utilized to rapidly disperse the deposited and settled particles at the bottom valve, so that the magnetorheological fluid in the working cylinder is kept to be dynamically and uniformly mixed, and the heat dissipation performance of the double-cylinder shock absorber is improved.
According to the magnetorheological damper capable of rapidly redispersing and settling particles, the influence caused by settling is eliminated, and for the magnetorheological fluid, the requirement on settling property is reduced, so that the shear stress can be further improved, the viscosity of the magnetorheological fluid mother liquor is reduced, and the performance is greatly improved; for the magneto-rheological damper, the problem of blocking a bottom valve is eliminated, so that the magneto-rheological damper can be used for engineering; the liquid in the working cylinder keeps dynamic mixing evenly, the stability of damping is guaranteed, the heat dissipation problem of the double-cylinder shock absorber is improved through fluid circulation, the damping capacity of the shock absorber is improved, and the cross-country speed of a vehicle can be further improved.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (4)
1. A magnetorheological damper having rapidly redispersible settled particles, comprising:
a guide seat and a support seat;
the one-way bottom valve is arranged on the supporting seat and used for strengthening the compression valve into a safety valve to form a one-way valve, so that when the shock absorber is compressed, the one-way bottom valve is completely closed; and
a one-way valve disposed on the rod guide for effecting travel-related switching by piston movement, wherein the one-way valve comprises:
a guide belt;
the sliding ring is arranged on the piston rod through the guide belt, so that under the action of friction force between the guide belt and the piston rod, the sliding ring can move along with the piston rod;
the through hole set up in lead to compensation room department on the guide holder, with when the shock absorber is in the compression, the through hole is opened for the fluid of working cylinder epicoele is in the piston rod squeezes down and gets into the compensation room, and when the shock absorber is in tensile stroke, the sliding ring is along with the piston rod motion is in order to close the through hole, makes pressure in the compensation room is higher than the working cylinder cavity of resorption, and compensation fluid warp one-way bottom valve gets into the working cylinder, fluid impact, stirring cavity of resorption settlement granule and dilution cavity of resorption liquid.
2. The rapidly redispersible settled particulate magnetorheological damper of claim 1, wherein the one-way valve further comprises:
and the limiting screw is used for limiting the displacement of the slip ring.
3. The magnetorheological damper of claim 1, wherein the one-way bottom valve comprises a valve plate, a valve rod and a nut.
4. The magnetorheological damper capable of rapidly redispersing settling particles as in claim 1, wherein the compensation oil forms unidirectional circulation among the upper chamber of the working cylinder, the compensation chamber and the lower chamber of the working cylinder in sequence so as to continuously impact and stir the settling particles to realize uniform dynamic mixing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810565665.5A CN108533665B (en) | 2018-06-04 | 2018-06-04 | Magnetorheological damper capable of quickly redispersing and settling particles |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810565665.5A CN108533665B (en) | 2018-06-04 | 2018-06-04 | Magnetorheological damper capable of quickly redispersing and settling particles |
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| CN108533665A CN108533665A (en) | 2018-09-14 |
| CN108533665B true CN108533665B (en) | 2019-12-24 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112761032A (en) * | 2019-09-20 | 2021-05-07 | 南安市董山尾机械科技有限公司 | Track vibration isolator and method |
| CN111005970B (en) * | 2020-01-03 | 2021-03-12 | 株洲时代新材料科技股份有限公司 | Rotary mixing magnetorheological fluid high-speed damper and magnetorheological fluid rotary mixing method thereof |
| CN113027974A (en) * | 2021-02-26 | 2021-06-25 | 上海理工大学 | Multi-mode magneto-rheological shear thickening liquid damper |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2496697Y (en) * | 2001-08-27 | 2002-06-26 | 上海汇众汽车制造有限公司 | New-type magnetic rheological fluid damper |
| EP1908985A1 (en) * | 2006-10-02 | 2008-04-09 | Delphi Technologies, Inc. | Twin-tube magnetorheological damper |
| US7900755B2 (en) * | 2007-09-28 | 2011-03-08 | GM Global Technology Operations LLC | Bi-fold valve-type magnetorheological fluid energy absorbing device |
| CN104791410B (en) * | 2015-04-29 | 2016-09-07 | 柳州孔辉汽车科技有限公司 | A kind of MR fluid shock absorber |
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Inventor after: Wei Yintao Inventor after: Wu Mingyu Inventor after: Feng Zhanzong Inventor after: Chen Yalong Inventor after: Zhang Huan Inventor after: Han Xiaodong Inventor after: Kang Zhenran Inventor after: He Yichao Inventor after: Liang Guanqun Inventor after: Peng Jing Inventor before: Wei Yintao Inventor before: Wu Mingyu Inventor before: Li Xuebing Inventor before: Feng Zhanzong Inventor before: Chen Yalong Inventor before: Zhang Huan Inventor before: Han Xiaodong Inventor before: Kang Zhenran Inventor before: He Yichao Inventor before: Liang Guanqun Inventor before: Peng Jing |
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Effective date of registration: 20221207 Address after: No. A2490, 2nd Floor, College Park, Dongsheng Science Park, Zhongguancun, No. A18 Xueqing Road, Haidian District, Beijing 100083 Patentee after: Beijing Keyi International Intelligent Suspension Technology Co.,Ltd. Address before: 100084 Tsinghua Yuan, Beijing, Haidian District Patentee before: TSINGHUA University |
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