CN115143223B - Magnetorheological damper provided with magnetic field barrier - Google Patents
Magnetorheological damper provided with magnetic field barrier Download PDFInfo
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- CN115143223B CN115143223B CN202210755245.XA CN202210755245A CN115143223B CN 115143223 B CN115143223 B CN 115143223B CN 202210755245 A CN202210755245 A CN 202210755245A CN 115143223 B CN115143223 B CN 115143223B
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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 31
- 238000013016 damping Methods 0.000 claims abstract description 106
- 238000003860 storage Methods 0.000 claims abstract description 33
- 238000009826 distribution Methods 0.000 claims abstract description 16
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 8
- 239000011261 inert gas Substances 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 239000012530 fluid Substances 0.000 abstract description 13
- 230000004907 flux Effects 0.000 abstract description 5
- 230000035939 shock Effects 0.000 description 6
- 239000006096 absorbing agent Substances 0.000 description 5
- 238000013461 design Methods 0.000 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
- 238000005457 optimization Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 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
- 238000005036 potential barrier Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The magnetorheological damper with the magnetic field barrier comprises an oil storage cylinder, and a free piston and a damping piston which are arranged in the oil storage cylinder; a gap exists between the damping piston and the working part at the inner side of the oil storage cylinder barrel to form a damping gap; a group of annular magnets A which are distributed at intervals along the axial direction are embedded on the working part, a group of annular magnets B which are distributed at intervals along the axial direction are correspondingly embedded on the damping piston, the annular magnets A are arranged in a staggered mode relative to the annular magnets B, the magnetic pole distribution direction of the annular magnets A is opposite to the magnetic pole distribution direction of the annular magnets B, and the magnetic pole distribution direction of the annular magnets B is identical to the magnetic pole distribution direction of the electromagnetic coil after the electromagnetic coil is electrified, so that a magnetic field barrier is formed. According to the invention, the magnetic field barrier is arranged in the magnetorheological damper, 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 enlarged, and the output range of the damping force and the numerical value of the maximum damping force are larger than those of the magnetorheological damper in the prior art.
Description
Technical Field
The invention relates to the technical field of shock absorbers, in particular to a magneto-rheological shock absorber with a magnetic field barrier.
Background
The magnetorheological damping fluid shows Newtonian fluid characteristics of low viscosity under the action of no magnetic field; under the action of strong magnetic field, the guest-han body features of high viscosity and low fluidity are presented. The magnetorheological damping fluid is instantaneous and reversible under the action of a magnetic field, so that the magnetorheological damping fluid has stronger damping performance, and the viscosity and the magnetic flux of the magnetorheological damping fluid have a one-to-one correspondence.
The magneto-rheological damper has low energy consumption and can achieve millisecond response, and is a semi-active control device with excellent performance. The output range of the damping force and the magnitude of the maximum damping force are often the focus of research in the field of magnetorheological shock absorbers. In the magnetorheological damper, the working clearance and the path of the magnetorheological damping fluid directly affect the two major research focuses. The traditional magnetorheological damper takes the gap between the damping piston and the oil storage cylinder barrel as a damping channel, the effective damping gap is only concentrated near the two ends of the electromagnetic coil, the effective damping length is shorter, and the output range of the damping force and the numerical value of the maximum damping force are limited.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a magneto-rheological damper provided with a magnetic field barrier. According to the invention, the magnetic field potential barrier is arranged in the magnetorheological damper, so that the direction of the magnetic field is changed, more magnetic fluxes are perpendicular to the working channel of the magnetorheological damping fluid, the influence range of the magnetic field is enlarged, and the output range of the damping force and the numerical value of 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 magnetorheological damper with the magnetic field barrier comprises an oil storage cylinder, and a free piston and a damping piston which are arranged in the oil storage cylinder; the damping piston is connected with the 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 piece, and the bottom end of the oil storage cylinder barrel is sealed by a bottom cover; the free piston separates the internal 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; inert gas is filled in the air chamber, and magnetorheological damping liquid is filled in the damping oil chamber; an electromagnetic coil is arranged on the damping piston; a gap exists between the damping piston and the working part at the inner side of the oil storage cylinder barrel, so that a damping gap is formed; the working part is embedded with a group of annular magnets A which are distributed at intervals along the axial direction, the damping piston is correspondingly embedded with a group of annular magnets B which are distributed at intervals along the axial direction, the annular magnets A are arranged in a staggered manner relative to the annular magnets B, the magnetic pole distribution direction of the annular magnets A is opposite to the magnetic pole distribution direction of the annular magnets B, and the magnetic pole distribution direction of the annular magnets B is the same as the magnetic pole distribution direction of the electrified electromagnetic coil, so that a magnetic field barrier is formed.
Compared with the prior art, the magnetic field barrier is formed by arranging the magnets on the working part of the oil storage cylinder barrel and the damping piston in a specific mode, and when the magnetorheological damper works, the magnetic flux can be more vertical to the working channel of the magnetorheological damping fluid, so that the influence range of the magnetic field is enlarged, the effective damping length is larger, and the output range of the damping force and the numerical value of the maximum damping force are larger than those of the magnetorheological damper 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; the oil storage cylinder barrel is provided with a group of damping holes which are uniformly distributed along the circumferential direction at the working part position; 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 increased.
As optimization, in the magnetorheological damper provided with the magnetic field barrier, the piston rod comprises a piston outer rod and a piston inner rod; the piston outer rod consists of a large section and a small section, and forms a step shape; the damping piston is sleeved on a small section of the piston outer rod, one end of the damping piston abuts against a shaft shoulder on the piston outer rod to form positioning, and the other end of the damping piston is pressed by a piston inner rod in threaded connection with the small section of the piston outer rod to form positioning. With this structure, reliability is high, and manufacturing and assembly are easy.
Further, 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 outer piston rod is hollow, and the lead wires of the electromagnetic coil are led out from the hollow structure of the outer piston rod. The piston outer rod is designed into a hollow shape and is used for leading out a lead of the electromagnetic coil, and meanwhile, the purpose of light weight is achieved.
Further the piston inner rod passes through the hole site on the free piston to form sliding fit with the free piston and is sealed by the sealing element. Therefore, the free piston has a radial limiting effect on the free piston, and radial shaking of the damping piston in the working process is prevented.
In the magnetorheological damper provided with the magnetic field barrier, the air chamber is filled with nitrogen as an optimization. Nitrogen is a relatively readily available inert gas, which is beneficial to cost control.
In the magnetorheological damper provided with the magnetic field barrier, the section of the free piston is in a U shape. 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; at the same time, the design also plays a role in light weight.
In the magnetorheological damper provided with the magnetic field barrier, the ring-shaped magnets A are arranged on the working part at equal intervals.
In the magnetorheological damper provided with the magnetic field barrier, the ring magnets B are equally arranged on the damping piston.
Drawings
FIG. 1 is a schematic diagram of a magnetorheological damper of the present invention provided with a magnetic field barrier;
FIG. 2 is a schematic magnetic circuit diagram of a magnetorheological damper of the present invention provided with a magnetic field barrier.
The marks in the drawings are:
1-an oil storage cylinder barrel, 101-a working part; 2-free piston; 3-damping piston; 4-a bottom cover; 5-piston rod, 501-piston outer rod, 502-piston inner rod; 6-an electromagnetic coil; 7-damping gap; 8-A ring magnets; 9-B ring magnets; 10-damping hole, 11-gasket.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not intended to be limiting. In the following examples, the technical means or common general knowledge in the art is not described in detail.
Referring to fig. 1 and 2, the magnetorheological damper provided with a magnetic field barrier of the invention comprises an oil storage cylinder 1, a free piston 2 and a damping piston 3 which are arranged in the oil storage cylinder 1; the damping piston 3 is connected with the piston rod 5, the piston rod 5 is in sliding fit with the top end of the oil storage cylinder 1 and is sealed by a sealing piece (the piston rod 5 is matched with a guide hole at the top of the oil storage cylinder 1), and the bottom end of the oil storage cylinder 1 is sealed by the 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; inert gas is filled in the air chamber, and magnetorheological damping liquid is filled in the damping oil chamber; an electromagnetic coil 6 is arranged on the damping piston 3; a gap exists between the damping piston 3 and the working part 101 at the inner side of the oil storage cylinder barrel 1 to form a damping gap 7; unlike the prior art, in the scheme of the invention: the working part 101 is embedded with a group of ring magnets 8 which are distributed at intervals along the axial direction, correspondingly, the damping piston 3 is embedded with a group of ring magnets 9 which are distributed at intervals along the axial direction, the ring magnets 8A are arranged in a staggered manner relative to the ring magnets 9B, the magnetic pole distribution direction of the ring magnets 8A is opposite to the magnetic pole distribution direction of the ring magnets 9B, the magnetic pole distribution direction of the ring magnets 9B is the same as the magnetic pole distribution direction of the electromagnetic coil 6 after being electrified (namely, the S-stage direction of the ring magnets 8A is the same as the N-stage direction of the ring magnets 9B, and the N-stage direction of the ring magnets 9B is the same as the N-stage direction of the electromagnetic coil 6), so as to form a magnetic field barrier.
When the magnetorheological damper is used for shock absorption, the damping piston 3 moves along the working part 101, magnetorheological damping fluid is extruded and flows through the damping channel to generate damping force. The magnetic field generated by the annular magnet A8 and the annular magnet B9 are overlapped with the magnetic field generated by the electromagnetic coil 6 to form a magnetic field 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.
Examples (see fig. 1-2):
in this embodiment: the inner wall of the oil storage cylinder barrel 1 is provided with a step to form a working part 102; the oil storage cylinder 1 is provided with a group of damping holes 10 which are uniformly distributed along the circumferential direction at the position of the working part 102; the damping hole 10 comprises an axial section and a radial section, the axial section being in communication with the damping gap 7 via the radial section. The additionally arranged damping holes 10 increase 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 a piston outer rod 501 and a piston inner rod 502; the piston outer rod 501 is composed of a large section and a small section and is formed into a stepped shape; the damping piston 3 is sleeved on a small section of the piston outer rod 501, one end of the damping piston is propped against a shaft shoulder on the piston outer rod 501 to form positioning, and the other end of the damping piston is pressed by a piston inner rod 502 which is connected with the small section of the piston outer rod 501 through threads to form positioning.
In this embodiment: a gasket 11 is arranged between the piston inner rod 502 and the damping piston 3. The gasket 11 provides a higher strength threaded connection and a sealing effect.
In this embodiment: the piston outer rod 501 is hollow, and the lead wire of the electromagnetic coil 6 is led out from the hollow structure of the piston outer rod 501. The piston outer rod 501 is hollow and is used for leading out the lead wire of the electromagnetic coil 6, and the purpose of light weight is achieved.
In this embodiment: the piston inner rod 502 passes through a hole in the free piston 2 to form a sliding fit with the free piston 2 and is sealed by a seal. The free piston 2 thus has a radial limit for the piston rod 5.
In this embodiment: the air chamber is filled with nitrogen. Nitrogen is a relatively readily available inert gas, which is beneficial to cost control.
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; at the same time, 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 the embodiment, the outer end of the piston outer rod 502 is provided with threads, and the suspension ring at the top of the shock absorber is fixed on the piston rod 5 through a threaded connection structure; the outer side of the bottom cover 4 is provided with a stud structure, and the suspension rings at the bottom of the shock absorber are fixed on the bottom cover 4 through a threaded connection structure. The reliability of threaded connection is guaranteed, and the processing is easy. Of course, when implementing the scheme of the invention, the connecting bracket is not necessarily in a hanging ring form, and can also be in a real form.
In this embodiment, both the a ring magnet 8 and the B ring magnet 9 are composed of a plurality of arcuate subsections. The design can reduce the manufacturing difficulty and is beneficial to industrialized implementation.
It should be noted that the magnetorheological damper of the present invention is developed in response to the requirements of automobiles, but the technology of the present invention is not limited to use in the field of automobile parts.
The above general description of the invention and the description of specific embodiments thereof referred to in this application should not be construed as limiting the scope of the invention. Those skilled in the art can add, subtract or combine the features disclosed in the foregoing general description and/or the detailed description (including examples) to form other technical solutions within the scope of the present application without departing from the disclosure of the present application.
Claims (9)
1. The magnetorheological damper 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 the 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 piece, and the bottom end of the oil storage cylinder barrel (1) is sealed by the bottom cover (4); the free piston (2) divides the internal 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; inert gas is filled in the air chamber, and magnetorheological damping liquid is filled in the damping oil chamber; an electromagnetic coil (6) is arranged on the damping piston (3); a gap exists between the damping piston (3) and the working part (101) at the inner side of the oil storage cylinder barrel (1) to form a damping gap (7); the method is characterized in that: the working part (101) is embedded with a group of annular magnets A (8) which are distributed at intervals along the axial direction, the damping piston (3) is correspondingly embedded with a group of annular magnets B (9) which are distributed at intervals along the axial direction, the annular magnets A (8) are arranged in a staggered manner relative to the annular magnets B (9), the magnetic pole distribution direction of the annular magnets A (8) is opposite to the magnetic pole distribution direction of the annular magnets B (9), and the magnetic pole distribution direction of the annular magnets B (9) is the same as the magnetic pole distribution direction of the electromagnetic coil (6) after being electrified, so that a magnetic field barrier is formed;
the inner wall of the oil storage cylinder barrel (1) is provided with a step to form a working part (101); a group of damping holes (10) which are uniformly distributed along the circumferential direction are arranged at the position of the working part (101) on the oil storage cylinder barrel (1); 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.
2. The magnetorheological damper provided with a magnetic field barrier according to claim 1, wherein: the piston rod (5) comprises a piston outer rod (501) and a piston inner rod (502); the piston outer rod (501) consists of a large section and a small section, and is formed into a stepped shape; the damping piston (3) is sleeved on a small section of the piston outer rod (501), one end of the damping piston is propped against a shaft shoulder on the piston outer rod (501) to form positioning, and the other end of the damping piston is pressed by a piston inner rod (502) connected with the small section of the piston outer rod (501) through threads to form positioning.
3. The magnetorheological damper provided with a magnetic field barrier according to claim 2, wherein: a gasket (11) is arranged between the piston inner rod (502) and the damping piston (3).
4. The magnetorheological damper provided with a magnetic field barrier according to claim 2, wherein: the piston outer rod (501) is hollow, and the lead wire of the electromagnetic coil (6) is led out from the hollow structure of the piston outer rod (501).
5. The magnetorheological damper provided with a magnetic field barrier according to claim 2, 3 or 4, wherein: 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 piece.
6. The magnetorheological damper provided with a magnetic field barrier according to claim 1, wherein: the air chamber is filled with nitrogen.
7. The magnetorheological damper provided with a magnetic field barrier according to claim 1, wherein: the section of the free piston (2) is U-shaped.
8. The magnetorheological damper provided with a magnetic field barrier according to claim 1, wherein: the A ring magnets (8) are equidistantly arranged on the working part (101).
9. The magnetorheological damper provided with a magnetic field barrier according to claim 1, wherein: the B ring magnets (9) are equidistantly arranged on the damping piston (3).
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 CN115143223A (en) | 2022-10-04 |
| CN115143223B true CN115143223B (en) | 2024-01-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210755245.XA Active CN115143223B (en) | 2022-06-29 | 2022-06-29 | Magnetorheological damper provided with magnetic field barrier |
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| Country | Link |
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| CN (1) | CN115143223B (en) |
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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115143223A (en) | 2022-10-04 |
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