CN115143223A - Magneto-rheological shock absorber provided with magnetic field barrier - Google Patents
Magneto-rheological shock absorber provided with magnetic field barrier Download PDFInfo
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- CN115143223A CN115143223A CN202210755245.XA CN202210755245A CN115143223A CN 115143223 A CN115143223 A CN 115143223A CN 202210755245 A CN202210755245 A CN 202210755245A CN 115143223 A CN115143223 A CN 115143223A
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- piston
- damping
- magnetic field
- storage cylinder
- oil storage
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- 230000004888 barrier function Effects 0.000 title claims abstract description 25
- 230000035939 shock Effects 0.000 title claims abstract description 17
- 239000006096 absorbing agent Substances 0.000 title claims abstract description 16
- 238000013016 damping Methods 0.000 claims abstract description 110
- 238000003860 storage Methods 0.000 claims abstract description 33
- 238000009826 distribution Methods 0.000 claims abstract description 17
- 238000005036 potential barrier Methods 0.000 claims abstract description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 239000011261 inert gas Substances 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 abstract description 10
- 230000004907 flux Effects 0.000 abstract description 5
- 230000009471 action Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000000670 limiting effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
Images
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
- F16F9/53—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
- F16F9/3207—Constructional features
-
- 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
-
- 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
- F16F9/3235—Constructional features of cylinders
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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)
Abstract
The magneto-rheological shock absorber is provided with a magnetic field barrier and comprises an oil storage cylinder barrel, a free piston and a damping piston, wherein the free piston and the damping piston are arranged in the oil storage cylinder barrel; a gap exists between the damping piston and the working part at the inner side of the oil storage cylinder to form a damping gap; the working part is embedded with a group of A ring magnets which are distributed at intervals along the axial direction, correspondingly, the damping piston is embedded with a group of B ring magnets which are distributed at intervals along the axial direction, the A ring magnets are arranged in a staggered mode relative to the B ring magnets, the magnetic pole distribution direction of the A ring magnets is opposite to that of the B ring magnets, and the magnetic pole distribution direction of the B ring magnets is the same as that of the electromagnetic coils after being electrified, so that a magnetic field potential barrier is formed. The magnetic field barrier is arranged in the magnetorheological shock absorber, so that the flowing direction of the magnetic field is changed, the magnetic flux can be more vertical to the working channel of the magnetorheological damping fluid, the influence range of the magnetic field is expanded, and the output range of the damping force and the maximum damping force value are larger than those of the magnetorheological shock absorber in the prior art.
Description
Technical Field
The invention relates to the technical field of shock absorbers, in particular to a magnetorheological shock absorber with a magnetic field potential barrier.
Background
The magnetorheological damping fluid has the characteristics of low-viscosity Newtonian fluid under the action of no magnetic field; under the action of strong magnetic field, the Binghan body has high viscosity and low flowability. The rheological property of the magneto-rheological damping liquid under the action of a magnetic field is instantaneous and reversible, so that the magneto-rheological damping liquid has stronger damping performance, and the viscosity of the magneto-rheological damping liquid and the magnetic flux have a one-to-one correspondence relationship.
The magnetorheological damper has low energy consumption and millisecond response, and is a semi-active control device with excellent performance. The output range of the damping force and the maximum damping force value are the main points of research in the field of magnetorheological shock absorbers. In the magnetorheological shock absorber, the working clearance and path of the magnetorheological damping fluid directly influence the two major research points. The traditional magneto-rheological shock absorber takes a gap between a damping piston and an oil storage cylinder as a damping channel, the effective damping gap is only concentrated near two ends of an electromagnetic coil, the effective damping length is short, and the output range of the damping force and the value of the maximum damping force are limited.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the magnetorheological damper with the magnetic field potential barrier. The magnetic field barrier is arranged in the magnetorheological damper, so that the direction of a magnetic field is changed, the magnetic flux can be more vertical to the working channel of the magnetorheological damping fluid, the influence range of the magnetic field is expanded, and the output range of the damping force and the maximum damping force are larger than those of the magnetorheological damper in the prior art.
The technical scheme of the invention is as follows:
the magneto-rheological shock absorber is provided with a magnetic field barrier and comprises an oil storage cylinder barrel, a free piston and a damping piston, wherein the free piston and the damping piston are arranged in the oil storage cylinder barrel; the damping piston is connected with a piston rod, the piston rod is in sliding fit with the top end of the oil storage cylinder barrel and is sealed through a sealing element, and the bottom end of the oil storage cylinder barrel is sealed by a bottom cover; the free piston divides the inner space of the oil storage cylinder barrel into an air chamber and a damping oil chamber, and the damping piston is positioned in the damping oil chamber; the gas chamber is filled with inert gas, and the damping oil chamber is filled with magnetorheological damping liquid; an electromagnetic coil is arranged on the damping piston; a gap is formed between the damping piston and the working part at the inner side of the oil storage cylinder to form a damping gap; the working part is embedded with a group of A ring magnets which are distributed at intervals along the axial direction, the A ring magnets correspond to the B ring magnets, the damping piston is embedded with a group of B ring magnets which are distributed at intervals along the axial direction, the A ring magnets are arranged in a staggered mode relative to the B ring magnets, the magnetic pole distribution direction of the A ring magnets is opposite to the magnetic pole distribution direction of the B ring magnets, the magnetic pole distribution direction of the B ring magnets is the same as the magnetic pole distribution direction of the electromagnetic coils after the electromagnetic coils are electrified, and a magnetic field potential barrier is formed.
Compared with the prior art, the working part of the oil storage cylinder and the damping piston are provided with the magnets according to a specific mode to form a magnetic field potential barrier, and when the damping cylinder works, magnetic flux can be more vertical to a working channel of magnetorheological damping fluid, so that the influence range of a magnetic field is enlarged, the effective damping length is longer, and the output range of damping force and the value of the maximum damping force are larger than those of the magnetorheological shock absorber in the prior art.
As an optimization, in the magnetorheological damper provided with the magnetic field barrier, the inner wall of the oil storage cylinder barrel is provided with a step to form a working part; a group of damping holes which are uniformly distributed along the circumferential direction are formed in the working part of the oil storage cylinder barrel; the damping hole comprises an axial section and a radial section, and the axial section is communicated with the damping gap through the radial section. By arranging the damping holes, the shearing area of the magnetorheological damping fluid is increased, so that the output range of the damping force and the numerical value of the maximum damping force are further improved.
As an optimization, in the magnetorheological damper provided with the magnetic field barrier, the piston rod comprises an outer piston rod and an inner piston rod; the piston outer rod consists of a large section and a small section, and a step shape is formed; the damping piston is sleeved on the small section of the piston outer rod, one end of the damping piston is abutted against a shaft shoulder on the piston outer rod to form positioning, and the other end of the damping piston is pressed by the piston inner rod which is in threaded connection with the small section of the piston outer rod to form positioning. With this structure, the reliability is high, and the manufacture and assembly are easy.
Furthermore, a gasket is arranged between the piston inner rod and the damping piston. Through setting up the gasket, be favorable to improving threaded connection's intensity.
Further, the piston outer rod is hollow, and a lead of the electromagnetic coil is led out from the hollow structure of the piston outer rod. The piston outer rod is designed to be hollow and used for leading out a lead of the electromagnetic coil, and meanwhile, the aim of light weight is achieved.
And the piston inner rod penetrates through a hole position on the free piston to form sliding fit with the free piston and is sealed by a sealing element. Therefore, the free piston has a radial limiting effect on the free piston, and the effect of preventing the damping piston from shaking radially in the working process is achieved.
Preferably, in the magnetorheological damper provided with the magnetic field barrier, the gas chamber is filled with nitrogen. Nitrogen is an inert gas which is easy to obtain, and is beneficial to controlling the cost.
Preferably, in the magnetorheological damper provided with the magnetic field barrier, the cross section of the free piston is U-shaped. By adopting the structural design, the matching length of the free piston and the oil storage cylinder barrel can be ensured, and the sealing is facilitated; meanwhile, the design also plays a role in light weight.
Preferably, in the aforementioned magnetorheological damper provided with the magnetic field barrier, the a ring magnets are equidistantly arranged on the working portion.
Preferably, in the magnetorheological damper provided with the magnetic field barrier, the ring magnets B are equidistantly arranged on the damping piston.
Drawings
FIG. 1 is a schematic view of a magnetorheological damper provided with a magnetic field barrier according to the present invention;
FIG. 2 is a schematic magnetic circuit diagram of the MR damper of the present invention with a magnetic field barrier.
The labels in the figures are:
1-an oil storage cylinder barrel, 101-a working part; 2-a free piston; 3-a damping piston; 4-bottom cover; 5-piston rod, 501-piston outer rod, 502-piston inner rod; 6-an electromagnetic coil; 7-damping gap; 8-A ring magnet; 9-B ring magnet; 10-damping hole, 11-gasket.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention. In the following examples, the details are not described in detail and are all conventional technical means or technical common knowledge in the art.
Referring to fig. 1 and 2, the magnetorheological damper provided with the magnetic field barrier of the invention comprises an oil storage cylinder barrel 1, a free piston 2 and a damping piston 3, wherein the free piston 2 and the damping piston are arranged in the oil storage cylinder barrel 1; the damping piston 3 is connected with a piston rod 5, the piston rod 5 is in sliding fit with the top end of the oil storage cylinder barrel 1 and is sealed through a sealing element (the piston rod 5 is matched with a guide hole in the top of the oil storage cylinder barrel 1), and the bottom end of the oil storage cylinder barrel 1 is sealed by a bottom cover 4; the free piston 2 divides the inner space of the oil storage cylinder barrel 1 into an air chamber and a damping oil chamber, and the damping piston 3 is positioned in the damping oil chamber; the gas chamber is filled with inert gas, and the damping oil chamber is filled with magnetorheological damping liquid; the damping piston 3 is provided with an electromagnetic coil 6; a gap is formed between the damping piston 3 and the working part 101 on the inner side of the oil storage cylinder barrel 1 to form a damping gap 7; different from the prior art, the scheme of the invention is as follows: inlay on the working part 101 and be equipped with a set of A ring magnet 8 that is interval distribution along the axial, it is corresponding, inlay on the damping piston 3 and be equipped with a set of B ring magnet 9 along axial interval distribution, the relative B ring magnet 9 dislocation set of A ring magnet 8, and the magnetic pole distribution direction of A ring magnet 8 is opposite with the magnetic pole distribution direction of B ring magnet 9, and the magnetic pole distribution direction of B ring magnet 9 is the same with the magnetic pole distribution direction after solenoid 6 circular telegram (namely S level of A ring magnet 8 points to the same with N level of B ring magnet 9 points to the same, N level of B ring magnet 9 points to the same with N level of solenoid 6' S potential barrier), forms magnetic field potential barrier.
When the magneto-rheological shock absorber is used for shock absorption, the damping piston 3 moves along the working part 101, and magneto-rheological damping fluid is extruded and flows through the damping channel to generate damping force. The magnetic fields generated by the annular magnet A8 and the annular magnet B9 and the magnetic field generated by the electromagnetic coil 6 are superposed to form a magnetic field potential barrier, so that the magnetic flux can be more vertical to the working channel of the magnetorheological damping fluid, the effective damping length is increased, and the damping force output range and the maximum damping force value are larger.
Example (see FIGS. 1-2):
in this embodiment: the inner wall of the oil storage cylinder barrel 1 is provided with steps to form a working part 102; a group of damping holes 10 which are uniformly distributed along the circumferential direction are formed in the oil storage cylinder barrel 1 at the position of the working part 102; the damping hole 10 comprises an axial section and a radial section, and the axial section is communicated with the damping gap 7 through the radial section. The extra damping hole 10 increases the shearing area of the magnetorheological damping fluid, thereby further enlarging the damping force output range and the maximum damping force value of the magnetorheological damper.
In this embodiment: the piston rod 5 comprises an outer piston rod 501 and an inner piston rod 502; the piston outer rod 501 is composed of a large section and a small section, and is in a step shape; the damping piston 3 is sleeved on a small section of the piston outer rod 501, one end of the damping piston abuts against a shaft shoulder on the piston outer rod 501 to form a location, and the other end of the damping piston is pressed by the piston inner rod 502 which is in threaded connection with the small section of the piston outer rod 501 to form a location.
In this embodiment: a gasket 11 is arranged between the piston inner rod 502 and the damping piston 3. The gasket 11 makes the screw connection stronger and has a sealing function.
In this embodiment: the piston outer rod 501 is hollow, and the lead of the electromagnetic coil 6 is led out from the hollow structure of the piston outer rod 501. The piston outer rod 501 is designed to be hollow, and is used for leading out a lead of the electromagnetic coil 6, and meanwhile, the purpose of light weight is achieved.
In this embodiment: the piston inner rod 502 passes through a hole on the free piston 2 to form sliding fit with the free piston 2, and is sealed by a sealing element. The free piston 2 thus has a radial stop for the piston rod 5.
In this embodiment: and nitrogen is filled in the gas chamber. Nitrogen is an inert gas which is easy to obtain, and is beneficial to controlling the cost.
In this embodiment: the section of the free piston 2 is U-shaped. By adopting the structural design, the matching length of the free piston and the oil storage cylinder barrel can be ensured, and the sealing is facilitated; meanwhile, the design also plays a role in light weight.
In this embodiment: the a ring magnets 8 are equidistantly provided on the working portion 101.
In this embodiment: the B ring magnets 9 are equidistantly arranged on the damping piston 3.
In this embodiment, the outer end of the piston outer rod 502 is threaded, and the shock absorber top hanging ring is fixed on the piston rod 5 through a threaded connection structure; the outside of bottom 4 is equipped with the double-screw bolt structure, and the rings are fixed in on bottom 4 through threaded connection structure in bumper shock absorber bottom. The reliability of the threaded connection is guaranteed, and the threaded connection is easy to process. Of course, in practicing the solution of the invention, the connecting bracket does not have to be in the form of a sling, but can also be in its real form.
In the present embodiment, the a ring magnet 8 and the B ring magnet 9 are each composed of a plurality of arc-shaped subsections. The design can reduce the manufacturing difficulty and is beneficial to industrial implementation.
It should be noted that the magnetorheological damper of the present invention has been developed for the needs of automobiles, but the technology of the present invention is not limited to the application in the field of automobile parts.
The above general description of the invention and the description of the specific embodiments thereof, as referred to in this application, should not be construed as limiting the technical solutions of the invention. Those skilled in the art can add, reduce or combine the technical features disclosed in the general description and/or the specific embodiments (including the examples) to form other technical solutions within the protection scope of the present application according to the disclosure of the present application without departing from the structural elements of the present invention.
Claims (10)
1. The magneto-rheological shock absorber provided with the magnetic field barrier comprises an oil storage cylinder barrel (1), and a free piston (2) and a damping piston (3) which are arranged in the oil storage cylinder barrel (1); the damping piston (3) is connected with a piston rod (5), the piston rod (5) is in sliding fit with the top end of the oil storage cylinder barrel (1) and is sealed through a sealing element, and the bottom end of the oil storage cylinder barrel (1) is sealed by a bottom cover (4); the free piston (2) divides the inner space of the oil storage cylinder (1) into an air chamber and a damping oil chamber, and the damping piston (3) is positioned in the damping oil chamber; the gas chamber is filled with inert gas, and the damping oil chamber is filled with magnetorheological damping liquid; an electromagnetic coil (6) is arranged on the damping piston (3); a gap is formed between the damping piston (3) and the working part (101) at the inner side of the oil storage cylinder (1) to form a damping gap (7); the method is characterized in that: inlay on work portion (101) and be equipped with a set of A ring magnet (8) that are interval distribution along the axial, correspond, inlay on damping piston (3) and be equipped with a set of B ring magnet (9) along axial interval distribution, the relative B ring magnet (9) dislocation set of A ring magnet (8), and the magnetic pole distribution direction of A ring magnet (8) and B ring magnet (9) is opposite, and the magnetic pole distribution direction after the magnetic pole distribution direction of B ring magnet (9) and solenoid (6) circular telegram is the same, forms the magnetic field potential barrier.
2. The magnetorheological damper provided with a magnetic field barrier according to claim 1, wherein: the inner wall of the oil storage cylinder barrel (1) is provided with steps to form a working part (102); a group of damping holes (10) which are uniformly distributed along the circumferential direction are formed in the oil storage cylinder barrel (1) at the position of the working part (102); the damping hole (10) comprises an axial section and a radial section, and the axial section is communicated with the damping gap (7) through the radial section.
3. The magnetorheological damper provided with a magnetic field barrier according to claim 1, wherein: the piston rod (5) comprises an outer piston rod (501) and an inner piston rod (502); the piston outer rod (501) consists of a large section and a small section, and is in a step shape; the damping piston (3) is sleeved on the small section of the piston outer rod (501), one end of the damping piston is abutted against a shaft shoulder on the piston outer rod (501) to form positioning, and the other end of the damping piston is pressed by the piston inner rod (502) which is in threaded connection with the small section of the piston outer rod (501) to form positioning.
4. The magnetorheological damper provided with a magnetic field barrier according to claim 3, wherein: and a gasket (11) is arranged between the piston inner rod (502) and the damping piston (3).
5. The magnetorheological damper provided with a magnetic field barrier according to claim 3, wherein: the piston outer rod (501) is hollow, and a lead of the electromagnetic coil (6) is led out from the hollow structure of the piston outer rod (501).
6. The magnetorheological damper provided with a magnetic field barrier according to claim 3, 4 or 5, wherein: the piston inner rod (502) penetrates through a hole position on the free piston (2) to form sliding fit with the free piston (2), and is sealed through a sealing piece.
7. The magnetorheological damper provided with a magnetic field barrier according to claim 1, wherein: and nitrogen is filled in the gas chamber.
8. The magnetorheological damper provided with a magnetic field barrier according to claim 1, wherein: the section of the free piston (2) is U-shaped.
9. The magnetorheological damper provided with a magnetic field barrier according to claim 1, wherein: the A ring magnets (8) are arranged on the working part (101) at equal intervals.
10. The magnetorheological damper provided with a magnetic field barrier according to claim 1, wherein: the B ring magnets (9) are arranged on the damping piston (3) at equal intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210755245.XA CN115143223B (en) | 2022-06-29 | 2022-06-29 | Magnetorheological damper provided with magnetic field barrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210755245.XA CN115143223B (en) | 2022-06-29 | 2022-06-29 | Magnetorheological damper provided with magnetic field barrier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115143223A true CN115143223A (en) | 2022-10-04 |
| CN115143223B CN115143223B (en) | 2024-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210755245.XA Active CN115143223B (en) | 2022-06-29 | 2022-06-29 | Magnetorheological damper provided with magnetic field barrier |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1500537A1 (en) * | 1987-08-10 | 1989-08-15 | Всесоюзный Научно-Исследовательский Институт Железнодорожного Транспорта | Damping device for axle box unit of vehicle bogie |
| US6318520B1 (en) * | 1999-09-13 | 2001-11-20 | Delphi Technologies, Inc. | Magnetorheological fluid damper tunable for smooth transitions |
| KR20120105882A (en) * | 2011-03-16 | 2012-09-26 | 인하대학교 산학협력단 | Mr damper having low fluid resistance |
| CN105909722A (en) * | 2016-06-17 | 2016-08-31 | 江苏大学 | Damping-adjustable shock absorber using magnetorheological fluid |
| CN110030309A (en) * | 2019-04-26 | 2019-07-19 | 哈尔滨工业大学 | A kind of MR damper of compact type |
| CN110081116A (en) * | 2019-04-26 | 2019-08-02 | 哈尔滨工业大学 | A kind of MR damper with wider damp adjustable range |
| WO2020073220A1 (en) * | 2018-10-10 | 2020-04-16 | 南华大学 | Dualextruding, piezoelectricity and magnetorheological composite and intelligent damper and control method therefor |
-
2022
- 2022-06-29 CN CN202210755245.XA patent/CN115143223B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1500537A1 (en) * | 1987-08-10 | 1989-08-15 | Всесоюзный Научно-Исследовательский Институт Железнодорожного Транспорта | Damping device for axle box unit of vehicle bogie |
| US6318520B1 (en) * | 1999-09-13 | 2001-11-20 | Delphi Technologies, Inc. | Magnetorheological fluid damper tunable for smooth transitions |
| KR20120105882A (en) * | 2011-03-16 | 2012-09-26 | 인하대학교 산학협력단 | Mr damper having low fluid resistance |
| CN105909722A (en) * | 2016-06-17 | 2016-08-31 | 江苏大学 | Damping-adjustable shock absorber using magnetorheological fluid |
| WO2020073220A1 (en) * | 2018-10-10 | 2020-04-16 | 南华大学 | Dualextruding, piezoelectricity and magnetorheological composite and intelligent damper and control method therefor |
| CN110030309A (en) * | 2019-04-26 | 2019-07-19 | 哈尔滨工业大学 | A kind of MR damper of compact type |
| CN110081116A (en) * | 2019-04-26 | 2019-08-02 | 哈尔滨工业大学 | A kind of MR damper with wider damp adjustable range |
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| Publication number | Publication date |
|---|---|
| CN115143223B (en) | 2024-01-19 |
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