CN112943838A - Rigidity and strength adjustable magnetorheological elastomer shock absorber - Google Patents
Rigidity and strength adjustable magnetorheological elastomer shock absorber Download PDFInfo
- Publication number
- CN112943838A CN112943838A CN202110131872.1A CN202110131872A CN112943838A CN 112943838 A CN112943838 A CN 112943838A CN 202110131872 A CN202110131872 A CN 202110131872A CN 112943838 A CN112943838 A CN 112943838A
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- CN
- China
- Prior art keywords
- adjustable
- strength
- rigidity
- shock absorber
- magnetorheological
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229920001971 elastomer Polymers 0.000 title claims abstract description 66
- 239000000806 elastomer Substances 0.000 title claims abstract description 61
- 230000035939 shock Effects 0.000 title claims abstract description 32
- 239000006096 absorbing agent Substances 0.000 title claims abstract description 25
- 230000005291 magnetic effect Effects 0.000 claims abstract description 18
- 230000005415 magnetization Effects 0.000 claims abstract description 5
- 238000013016 damping Methods 0.000 claims description 8
- 230000005426 magnetic field effect Effects 0.000 claims 1
- 239000006249 magnetic particle Substances 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 claims 1
- 230000005294 ferromagnetic effect Effects 0.000 abstract description 7
- 239000002245 particle Substances 0.000 abstract description 7
- 238000010521 absorption reaction Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 6
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
-
- 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
- F16F2228/00—Functional characteristics, e.g. variability, frequency-dependence
- F16F2228/06—Stiffness
- F16F2228/066—Variable stiffness
Abstract
The invention relates to a rigidity and strength adjustable magnetorheological elastomer shock absorber which comprises magnetorheological elastomers which are arranged symmetrically up and down and are connected with each other, wherein coils are wound in the two magnetorheological elastomers, the two coils are connected with an external adjustable direct current power supply, the magnetic field generated after the two coils are electrified is changed by adjusting the output current of the external adjustable direct current power supply, ferromagnetic particles in the magnetorheological elastomers are magnetized under the action of the magnetic field, and the rigidity and strength of the magnetorheological elastomers are changed along with the change of the rigidity and strength of the magnetorheological elastomers according to different magnetization degrees, so that the rigidity and strength of the shock absorber are adjusted. Compared with the prior art, the invention can conveniently adjust the rigidity and the strength of the shock absorber on the premise of not changing the shape of the shock absorber, thereby being suitable for more application occasions and generating better shock absorption effect.
Description
Technical Field
The invention relates to the technical field of shock absorbers, in particular to a magnetorheological elastomer shock absorber with adjustable rigidity and strength.
Background
Rubber shock absorbers, as an important shock absorbing element, have been widely used in various machines, automobiles, bridges, construction projects, railway locomotives, water vehicles, airplanes and other aircrafts. The rubber shock absorber has the advantages of high elasticity, large elastic deformation, small mass, convenience in mounting and dismounting and the like, the shape of the rubber can be freely selected, and the hardness can be adjusted through formula design, so that the requirements on rigidity and strength in different directions can be met.
However, the existing rubber shock absorber cannot freely change the hardness and rigidity of rubber while maintaining the existing shape, can only meet the requirements of shape and rigidity strength by readjusting the formula design and remanufacturing the shock absorber, and is not suitable for variable engineering environments.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a magnetorheological elastomer shock absorber with adjustable rigidity and strength, which can adjust the rigidity and the strength on the premise of keeping the shape unchanged.
The purpose of the invention can be realized by the following technical scheme: a rigidity and strength adjustable damper of a magneto-rheological elastomer comprises magneto-rheological elastomers which are arranged in an up-and-down symmetrical mode and are connected with each other, coils are wound inside the two magneto-rheological elastomers, the two coils are connected with an external adjustable direct-current power supply, the magnitude of current output by the external adjustable direct-current power supply is adjusted, a magnetic field generated after the two coils are electrified changes, ferromagnetic particles inside the magneto-rheological elastomer are magnetized under the action of the magnetic field, and the rigidity and strength of the magneto-rheological elastomer also change along with the change of the rigidity and strength of the damper according to different magnetization degrees, so that the rigidity and strength of the damper are.
Further, the winding directions of the two coils are the same.
Further, the two magnetorheological elastomers are connected with each other through a connecting disc.
Furthermore, a U-shaped groove is formed in the connecting disc, and a lead of the coil penetrates through the U-shaped groove and then is connected with an external adjustable direct current power supply.
Furthermore, the magnetorheological elastomer is wrapped by a shell, and the shell is provided with a round hole for leading out a coil wire.
Further, the shell comprises a shell body and a shell cover, and the shell cover is in threaded connection with the shell body.
Furthermore, a threaded through hole is formed in the center of the magnetorheological elastomer, a bolt is installed in the threaded through hole, and the bolt is used for connecting external parts needing damping.
Furthermore, a first through hole for passing through a bolt is formed in the center of the connecting disc.
Furthermore, a second through hole for passing through the bolt is formed in the position, corresponding to the threaded through hole, of the shell.
Further, the adjustable direct current power supply is specifically a 12V or 24V adjustable direct current stabilized power supply.
Compared with the prior art, the invention has the following advantages:
the invention adopts the magnetorheological elastomer as the damper main body, utilizes the mechanical property and the viscoelasticity of the magnetorheological elastomer to achieve better damping effect, winds the coil in the magnetorheological elastomer, connects the coil with an external adjustable direct current power supply, only needs to change the output current of the direct current power supply, can change the magnetic field generated after the coil is electrified, ferromagnetic particles in the magnetorheological elastomer are magnetized under the action of the magnetic field, and the rigidity and the strength of the magnetorheological elastomer are changed along with the change of the magnetization degree, so that the rigidity and the strength of the damper are changed, the response is rapid, the adjustment can be conveniently carried out according to the actual working condition without changing the shape of the damper again.
The two magneto-rheological elastomers are arranged in an up-and-down symmetrical mode, the coils wound in the same direction are arranged in the magneto-rheological elastomers, so that the coils generate magnetic fields in the same direction after being electrified, a better shock absorption and adjustment effect is achieved, the two magneto-rheological elastomers are mutually connected through the connecting disc, and the connecting disc is provided with the U-shaped groove, so that a coil wire can be conveniently led out to be connected with an external adjustable direct current power supply.
The middle of the magnetorheological elastomer is provided with the threaded through hole, the connecting disc and the shell are provided with the corresponding through holes, so that the shock absorber can be conveniently connected with an external part needing shock absorption through bolts, in practical application, two magnetorheological elastomers can be connected with the external part needing shock absorption, and only a single magnetorheological elastomer can be connected.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention;
FIG. 2 is a schematic view of a connecting disk structure;
the notation in the figure is: 1. magnetorheological elastomer, 2, coil, 3, connecting disc, 4 and shell.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
Examples
As shown in fig. 1, a rigidity and strength adjustable magnetorheological elastomer shock absorber comprises magnetorheological elastomers 1 which are arranged in an up-and-down symmetrical manner and are connected with each other, coils 2 are wound inside the two magnetorheological elastomers 1, the two coils 2 are connected with an external adjustable direct current power supply, a magnetic field generated after the two coils 2 are electrified is changed by adjusting the output current of the external adjustable direct current power supply, ferromagnetic particles inside the magnetorheological elastomers 1 are magnetized under the action of the magnetic field, and the rigidity and strength of the magnetorheological elastomers 1 are changed accordingly according to different magnetization degrees, so that the rigidity and strength of the shock absorber are adjusted.
The two magnetorheological elastomers are connected with each other through a connecting disc 3, as shown in fig. 2, a U-shaped groove is formed in the connecting disc 3, and a lead of the coil 2 penetrates through the U-shaped groove and then is connected with an external adjustable direct current power supply;
the magnetorheological elastomer 1 is externally wrapped by a shell 4, and the shell 4 is provided with a round hole for leading out a lead of the coil 2.
In addition, the winding directions of the two coils 2 are the same, and magnetic fields in the same direction can be generated after the coils are electrified, so that the adjusting effect is enhanced.
In order to conveniently connect the damper with an external part needing damping, a threaded through hole is formed in the center of the magnetorheological elastomer 1, and a bolt is installed in the threaded through hole and used for connecting the external part needing damping.
Correspondingly, a first through hole for penetrating a bolt is formed in the center of the connecting disc 3, a second through hole for penetrating the bolt is also formed in the position, corresponding to the threaded through hole, on the shell 4, and the two magnetorheological elastomers 1 can be connected with an external part needing damping through the bolt, or only the magnetorheological elastomer 1 on one side can be connected.
In practical application, the adjustable direct current power supply is specifically a 12V or 24V adjustable direct current stabilized power supply, and the shock absorber can be installed between parts needing shock absorption and also can be used as a shock absorption unit at the contact position of the bottom of the device and the ground. According to different application occasions, the output current of the external adjustable direct-current power supply is adjusted, the current passes through the coil to generate a magnetic field around the coil, and the magnetic field acts on ferromagnetic particles in the magnetorheological elastomer to enhance the elasticity of the magnetorheological elastomer, so that the rigidity and the strength of the damper are changed, the response is rapid, the adjustment is carried out according to the actual working condition requirement, the damper can be well applied to more occasions, and the damping effect is better played.
The magnetorheological elastomer is a novel intelligent material, is prepared by mixing ferromagnetic particles and a high-molecular polymer matrix, has excellent mechanical property and viscoelasticity, particularly has anisotropic magnetorheological elastomer, and the ferromagnetic particles in the anisotropic magnetorheological elastomer are linearly arranged, so that the elasticity of the magnetorheological elastomer can be enhanced, and a better damping effect is achieved;
after the shape of the magnetorheological elastomer is fixed, the damper can change the size of a magnetic field generated by the coil according to the change of the current provided by an external adjustable direct current power supply, so that the rigidity and the strength of the damper are changed, the response is quick, the damper can be adjusted according to the actual working condition requirement, and the damper can be applied to various occasions.
Claims (10)
1. The utility model provides a magnetic current becomes elastomer shock absorber with adjustable rigidity and intensity, a serial communication port, including the magnetic current becomes elastomer (1) that the longitudinal symmetry set up and interconnect, two magnetic current becomes elastomer (1) inside all twines and is provided with coil (2), two coil (2) all are connected with adjustable DC power supply of outside, through adjusting adjustable DC power supply output current size of outside, make two coil (2) change after getting electric magnetic field that produces, magnetic field effect inside magnetic particle becomes elastomer (1) down is magnetized, according to the magnetization degree difference, magnetic current becomes elastomer (1) rigidity intensity and also changes thereupon, thereby adjust the rigidity and the intensity of shock absorber.
2. A stiffness and strength adjustable magnetorheological elastomer shock absorber according to claim 1, wherein the two coils (2) are wound in the same direction.
3. A stiffness and strength adjustable magnetorheological elastomer shock absorber according to claim 1, wherein the two magnetorheological elastomers (1) are connected to each other by a connecting disc (3).
4. The damper with adjustable rigidity and strength as claimed in claim 3, wherein the connection disc (3) is provided with a U-shaped slot, and the lead of the coil (2) is connected with an external adjustable DC power supply after passing through the U-shaped slot.
5. The damper with adjustable rigidity and strength as claimed in claim 1, characterized in that the outer part of the magnetorheological elastomer (1) is wrapped with a shell (4), and the shell (4) is provided with a circular hole for leading out a lead of the coil (2).
6. A stiffness and strength adjustable magnetorheological elastomer shock absorber according to claim 5, wherein the housing (4) comprises a shell and a cover, the cover being threadedly connected to the shell.
7. The damper of claim 3, wherein a threaded through hole is formed in the center of the magnetorheological elastomer (1), and a bolt is installed in the threaded through hole and used for connecting an external part needing damping.
8. The magnetorheological elastomer shock absorber with adjustable rigidity and strength according to claim 7, wherein the connecting disc (3) is provided with a first through hole at the center for passing a bolt.
9. The magnetorheological elastomer shock absorber with adjustable rigidity and strength according to claim 7, wherein the housing (4) is provided with a second through hole corresponding to the threaded through hole for passing a bolt.
10. The adjustable stiffness and strength magnetorheological elastomer shock absorber of claim 1, wherein the adjustable dc power supply is a 12V or 24V adjustable dc regulated power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110131872.1A CN112943838A (en) | 2021-01-30 | 2021-01-30 | Rigidity and strength adjustable magnetorheological elastomer shock absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110131872.1A CN112943838A (en) | 2021-01-30 | 2021-01-30 | Rigidity and strength adjustable magnetorheological elastomer shock absorber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112943838A true CN112943838A (en) | 2021-06-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110131872.1A Pending CN112943838A (en) | 2021-01-30 | 2021-01-30 | Rigidity and strength adjustable magnetorheological elastomer shock absorber |
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| Country | Link |
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| CN (1) | CN112943838A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114321257A (en) * | 2021-12-31 | 2022-04-12 | 上海工程技术大学 | Shock absorber coupled with spring magnetorheological elastomer |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103410910A (en) * | 2013-08-22 | 2013-11-27 | 兰州大学 | Adaptive damping device |
| CN104315071A (en) * | 2014-08-25 | 2015-01-28 | 合肥工业大学 | Novel intelligent shock absorber integrating multilayer magnetorheological elastomers with magnetorheological damper |
| CN107524741A (en) * | 2017-07-28 | 2017-12-29 | 上海工程技术大学 | A kind of magnetic rheology elastic body suspension members for wheel hub motor |
| US20190154098A1 (en) * | 2017-11-17 | 2019-05-23 | Honda Motor Co., Ltd. | Mount for subframe and magnetorheological elastomer unit |
| CN109972667A (en) * | 2019-03-20 | 2019-07-05 | 南京理工大学 | A kind of composite-structure magnetorheological elastomer negative stiffness isolator |
| CN110528717A (en) * | 2019-09-06 | 2019-12-03 | 武汉理工大学 | Diagonal brace damper based on magnetic rheology elastic body |
| CN111005980A (en) * | 2019-12-27 | 2020-04-14 | 天津城建大学 | Rigidity-adjustable magneto-rheological vibration isolation device for multi-rotor fuselage |
-
2021
- 2021-01-30 CN CN202110131872.1A patent/CN112943838A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103410910A (en) * | 2013-08-22 | 2013-11-27 | 兰州大学 | Adaptive damping device |
| CN104315071A (en) * | 2014-08-25 | 2015-01-28 | 合肥工业大学 | Novel intelligent shock absorber integrating multilayer magnetorheological elastomers with magnetorheological damper |
| CN107524741A (en) * | 2017-07-28 | 2017-12-29 | 上海工程技术大学 | A kind of magnetic rheology elastic body suspension members for wheel hub motor |
| US20190154098A1 (en) * | 2017-11-17 | 2019-05-23 | Honda Motor Co., Ltd. | Mount for subframe and magnetorheological elastomer unit |
| CN109972667A (en) * | 2019-03-20 | 2019-07-05 | 南京理工大学 | A kind of composite-structure magnetorheological elastomer negative stiffness isolator |
| CN110528717A (en) * | 2019-09-06 | 2019-12-03 | 武汉理工大学 | Diagonal brace damper based on magnetic rheology elastic body |
| CN111005980A (en) * | 2019-12-27 | 2020-04-14 | 天津城建大学 | Rigidity-adjustable magneto-rheological vibration isolation device for multi-rotor fuselage |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114321257A (en) * | 2021-12-31 | 2022-04-12 | 上海工程技术大学 | Shock absorber coupled with spring magnetorheological elastomer |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210611 |
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| RJ01 | Rejection of invention patent application after publication |