CN213870886U - Controllable hydraulic damper based on magnetorheological rubber - Google Patents
Controllable hydraulic damper based on magnetorheological rubber Download PDFInfo
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- CN213870886U CN213870886U CN202022368407.3U CN202022368407U CN213870886U CN 213870886 U CN213870886 U CN 213870886U CN 202022368407 U CN202022368407 U CN 202022368407U CN 213870886 U CN213870886 U CN 213870886U
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- Prior art keywords
- magnetic field
- bracket
- magnetorheological rubber
- coil
- magnetorheological
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- 229920001971 elastomer Polymers 0.000 title claims abstract description 67
- 238000013016 damping Methods 0.000 claims abstract description 35
- 230000035699 permeability Effects 0.000 claims abstract description 8
- 230000009471 action Effects 0.000 claims abstract description 6
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 4
- 238000009434 installation Methods 0.000 claims description 2
- 239000012530 fluid Substances 0.000 description 5
- 230000035939 shock Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 239000006096 absorbing agent Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000004925 denaturation Methods 0.000 description 2
- 230000036425 denaturation Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000013017 mechanical damping Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The utility model provides a controllable hydraulic damper based on magnetorheological rubber, which comprises a magnetic field, a magnetorheological rubber ring, a hydraulic cylinder and a piston rod; the magnetic field comprises a magnetic field bracket with high magnetic permeability, a coil and a coil bracket; the hydraulic cylinder is filled with hydraulic oil; the magnetorheological rubber ring is clamped between the coil bracket and the piston rod with low magnetic permeability; the device consisting of the magnetic field, the magnetorheological rubber ring and the piston rod slides in the hydraulic cylinder and divides the hydraulic cylinder into a rod cavity and a rodless cavity; an annular flow channel is arranged between the magnetic field and the magnetorheological rubber ring and is used for hydraulic flow between the rod cavity and the rodless cavity; the magnetorheological rubber ring deforms under the action of the magnetic field, the area of the annular flow channel can be adjusted by controlling the size of the magnetic field, and the damping force is adjusted. By applying the technical scheme, the damping can be continuously adjusted, and the design of active and semi-active damping systems is facilitated.
Description
Technical Field
The utility model relates to a damper system technical field specifically indicates a controllable hydraulic damper based on magnetic current becomes rubber.
Background
The active and semi-active damping system realizes ideal damping level by adjusting parameters such as damping, rigidity and the like according to actual disturbance input, and is widely applied to mechanical equipment such as vehicles, robots, machine tools and the like. The semi-active control mode based on the variable damping device is a vibration control mode with wide application as a semi-active damping mode with low energy consumption and low cost, so the variable damping device is always the key point of the design of the controllable damping system.
Taking a vehicle damping system-a suspension system as an example, the variable damping device which is widely applied at present mainly comprises a magnetorheological fluid shock absorber and a mechanical damping adjusting shock absorber based on the opening degree of a damping valve. The magnetorheological fluid has the advantages of low energy consumption, large damping force in unit size, high response speed, continuously adjustable damping force and the like, and is widely concerned by people; however, due to the limitation of the manufacturing technology, the magnetic change fluid has the problems of suspension property, denaturation and the like, and the wide application of related products is limited. The mechanical damping adjusting shock absorber based on the opening degree of the damping valve is simple in implementation mode, but has the defects that damping cannot be continuously adjusted, system frequency response speed is low, device size is large and the like.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a controllable hydraulic damper based on magnetic current becomes rubber, the damping is adjustable in succession, is favorable to initiative and semi-initiative shock mitigation system's design.
In order to solve the technical problem, the utility model provides a controllable hydraulic damper based on magnetorheological rubber, which comprises a magnetic field, a magnetorheological rubber ring, a hydraulic cylinder and a piston rod; the magnetic field comprises a magnetic field bracket with high magnetic permeability, a coil and a coil bracket; the hydraulic cylinder is filled with hydraulic oil; the magnetorheological rubber ring is clamped between the coil bracket and the piston rod with low magnetic permeability; the device consisting of the magnetic field, the magnetorheological rubber ring and the piston rod slides in the hydraulic cylinder and divides the hydraulic cylinder into a rod cavity and a rodless cavity; an annular flow channel is arranged between the magnetic field and the magnetorheological rubber ring and is used for hydraulic flow between the rod cavity and the rodless cavity; the magnetorheological rubber ring deforms under the action of the magnetic field, the area of the annular flow channel can be adjusted by controlling the size of the magnetic field, and the damping force is adjusted.
In a preferred embodiment: the coil is wound on the coil support, and the magnetic field support is sleeved outside the coil and the coil support; and a clamping ring is arranged on a central shaft of the magnetic field bracket and used for fixing the coil bracket so that the coil bracket and the magnetic field bracket are coaxially arranged.
In a preferred embodiment: the magnetic field bracket is provided with an installation groove for installing a clamping ring; and a connecting piece is arranged at the end part of the magnetic field bracket and is used for connecting the piston rod.
In a preferred embodiment: and one end of the piston rod is provided with a chuck for fixing the axial position of the magnetorheological rubber ring.
In a preferred embodiment: and a rubber diaphragm is arranged at the bottom of the hydraulic cylinder and used for compensating the volume difference between the rod cavity and the rodless cavity.
In a preferred embodiment: and the outer wall of the magnetic field bracket is provided with a groove for installing the guide belt.
In a preferred embodiment: and a through hole is formed in the bottom of the magnetic field bracket.
Compared with the prior art, the technical scheme of the utility model possess following beneficial effect:
1. the magnetorheological rubber is used as an actuator, the size of the magnetorheological rubber ring is adjusted by changing the size of the magnetic field, so that the area of the annular flow channel is increased, the aim of adjusting damping parameters of the damper is fulfilled, continuous and adjustable damping can be realized, and the damper has high frequency response characteristic.
2. The magneto-rheological rubber is used as an actuator, and material characteristics such as different moduli, shearing coefficients and the like under the same magnetic field condition can be realized by changing the material proportion in the manufacturing process of the magneto-rheological rubber ring, so that the damping characteristic of the damper is changed, the damper has higher design flexibility, and the design of a semi-active damping system is facilitated.
3. The magneto-rheological rubber is used as the actuator, so that the defects of deposition denaturation and the like caused by the magneto-rheological fluid as the controlled element are overcome, and stable and reliable performance is provided.
4. The magnetic field, the magnetorheological rubber ring and the piston rod can be assembled into a whole and placed in the hydraulic cylinder, so that the magnetic field, the magnetorheological rubber ring and the piston rod not only serve as driving and executing devices, but also serve as the stress action of a main piston of the hydraulic cylinder, and the integration level of the system is improved.
Drawings
FIG. 1 is a sectional view of the overall structure of a controllable hydraulic damper based on magnetorheological rubber in the preferred embodiment of the present invention;
FIG. 2 is a top view of the magnetic field bracket and the MR rubber ring when the coil is not energized in the MR rubber-based controllable hydraulic damper according to the preferred embodiment of the present invention;
fig. 3 is a top view of the magnetic field bracket and the magnetorheological rubber ring when the coil is energized in the controllable hydraulic damper based on the magnetorheological rubber according to the preferred embodiment of the present invention.
Detailed Description
The invention is further described with reference to the drawings and the detailed description.
Referring to fig. 1, a controllable hydraulic damper based on a magnetorheological rubber ring comprises a magnetic field, a magnetorheological rubber ring 9, a hydraulic cylinder and a piston rod 1; the magnetic field is composed of a magnetic field bracket 5, a coil bracket 8, a coil 9, a clamping ring 10 and a guide belt 4; the magnetorheological rubber ring 9 is an annular rubber piece made of carbon-based iron powder and a silicon rubber matrix and is made in an annular die by a thermocatalytic curing process, and the arrangement of the carbon-based iron powder particles in the silicon rubber matrix has a chain structure; the hydraulic cylinder is composed of a sealing ring 2, a hydraulic cylinder body 3, a rubber diaphragm 6 and a hydraulic cylinder end cover 7.
The interconnection of the components is as follows:
after winding the coil 9 on the coil support 8, the coil is sleeved into the magnetic field support 5, a snap ring 10 is arranged on a central shaft of the magnetic field support 5 to fix the axial position of the coil support 8 on the magnetic field support 5, then a magnetorheological rubber ring 11 is sleeved on the central shaft of the magnetic field support 8, and the snap ring is arranged on the central shaft of the magnetic field support 5 and used for fixing the coil support to enable the coil support 8 and the magnetic field support 5 to be coaxially arranged. And one end of the piston rod 1 is provided with a chuck for fixing the axial position of the magnetorheological rubber ring 11. The piston rod 1 is connected with the magnetic field bracket 5 through threads; the outer wall of the magnetic field bracket 5 is provided with a groove for installing the guide belt 4, the guide belt 4 is sleeved on the outer side surface of the magnetic field bracket 5 from bottom to top, a piston rod penetrates through a central hole of the hydraulic cylinder body 3, which is provided with the sealing ring 2, on the upper end surface, and then the rubber diaphragm 6 is placed on the lower end surface of the hydraulic cylinder body 3 and is used for compensating the volume difference between the rod cavity and the rodless cavity; the cylinder end cap 7 is then screwed onto the cylinder block 3.
The magnetic field comprises a magnetic field bracket 5 with high magnetic permeability, a coil 9 and a coil bracket 8; the hydraulic cylinder 3 is filled with hydraulic oil; the magnetorheological rubber ring 11 is clamped between the coil bracket 8 and the piston rod 1 with low magnetic permeability; the bottom of the magnetic field bracket 5 is provided with a through hole; the device consisting of the magnetic field 9, the magnetorheological rubber ring 11 and the piston rod 1 slides in the hydraulic cylinder 3, and divides the hydraulic cylinder 3 into a rod cavity and a rodless cavity; an annular flow channel is arranged between the magnetic field and the magnetorheological rubber ring 11 and is used for hydraulic flow between the rod cavity and the rodless cavity; the magnetic field generates a closed magnetic induction line between the magnetic field bracket and the magnetorheological rubber ring. The magnetorheological rubber ring 11 deforms under the action of the magnetic field 9, the area of the annular flow channel can be adjusted by controlling the size of the magnetic field 9, and the damping force adjustment is realized.
The utility model discloses a concrete theory of operation as follows:
when a vehicle runs, the piston rod 1 and the connecting parts of the damper and the hydraulic cylinder body 3 are caused to generate relative displacement by road disturbance, oil in the rod cavity and the rod-free cavity is forced to flow through the annular gap 12, and pressure difference exists between the rod cavity and the rod-free cavity due to viscous friction force generated by the oil through the annular gap, so that damping force is formed, and the effects of dissipating road disturbance energy and attenuating vibration are achieved.
The damping coefficient of the damper can be adjusted by adjusting the area of the annular gap 12, so that the purpose of damping adjustment is achieved. When the coil 9 is not energized, the MR rubber ring 11 is not subjected to the magnetic field and is in its initial size, as shown in FIG. 2. When the rubber 9 is electrified, the magnetorheological rubber ring 11 is subjected to the action of a magnetic field shown by an arrow in fig. 3, the outer diameter is enlarged, the area of the annular gap 12 is reduced, and the damping coefficient of the damper is increased. As the current is gradually increased, the annular gap 12 gradually decreases until it closes.
Because the piston rod 1 causes the area difference between the rod cavity and the rodless cavity, when the damper works, the volume difference of oil liquid entering the rod cavity and flowing out of the rodless cavity is compensated by the expansion or rebound of the rubber diaphragm 6.
The utility model discloses a concrete control process as follows:
the utility model discloses an energizing current size of adjustment coil 8 changes the magnetic field intensity size that magnetorheological rubber ring 11 received to change the area of the annular gap 12 of fluid circulation, change damping coefficient and realize the shock attenuation level of ideal. When the damping system requires a larger damping force, the energizing current of the coil 8 is increased. Otherwise, it is decreased. Furthermore, the utility model discloses can also be through the material ratio when changing preparation magnetic current becomes rubber ring, control magnetic current becomes rubber ring and have material properties such as different moduli, shear coefficient under the same magnetic field intensity condition to the damping coefficient of control attenuator.
To sum up, the utility model discloses a design focus lies in:
a controllable hydraulic damper based on magnetorheological rubber takes a magnetorheological rubber ring as an actuating device, and the outer diameter of the magnetorheological rubber ring 11 is changed through a magnetic field generated after a coil is electrified, so that the area of an annular gap 12 of oil is changed, and the function of adjusting a damping coefficient is achieved. By adjusting the size of the electrified current, the area of the annular gap 12 can be continuously adjusted, the function of continuously adjustable damping can be realized, and the frequency response speed of control can be improved by using a magnetic field driving mode.
The above, only be the preferred embodiment of the present invention, but the design concept of the present invention is not limited to this, and any skilled person familiar with the technical field is in the technical scope disclosed in the present invention, and it is right to utilize this concept to perform insubstantial changes to the present invention, all belong to the act of infringing the protection scope of the present invention.
Claims (7)
1. A controllable hydraulic damper based on magnetorheological rubber is characterized in that: comprises a magnetic field, a magnetorheological rubber ring, a hydraulic cylinder and a piston rod; the magnetic field comprises a magnetic field bracket with high magnetic permeability, a coil and a coil bracket; the hydraulic cylinder is filled with hydraulic oil; the magnetorheological rubber ring is clamped between the coil bracket and the piston rod with low magnetic permeability; the device consisting of the magnetic field, the magnetorheological rubber ring and the piston rod slides in the hydraulic cylinder and divides the hydraulic cylinder into a rod cavity and a rodless cavity; an annular flow channel is arranged between the magnetic field and the magnetorheological rubber ring and is used for hydraulic flow between the rod cavity and the rodless cavity; the magnetorheological rubber ring deforms under the action of the magnetic field, the area of the annular flow channel can be adjusted by controlling the size of the magnetic field, and the damping force is adjusted.
2. The controllable hydraulic magnetorheological rubber-based damper of claim 1, wherein: the coil is wound on the coil support, and the magnetic field support is sleeved outside the coil and the coil support; and a clamping ring is arranged on a central shaft of the magnetic field bracket and used for fixing the coil bracket so that the coil bracket and the magnetic field bracket are coaxially arranged.
3. A controllable hydraulic damper based on magnetorheological rubber according to claim 2, wherein: the magnetic field bracket is provided with an installation groove for installing a clamping ring; and a connecting piece is arranged at the end part of the magnetic field bracket and is used for connecting the piston rod.
4. A controllable hydraulic damper based on magnetorheological rubber according to claim 1, wherein: and one end of the piston rod is provided with a chuck for fixing the axial position of the magnetorheological rubber ring.
5. A controllable hydraulic damper based on magnetorheological rubber according to claim 1, wherein: and a rubber diaphragm is arranged at the bottom of the hydraulic cylinder and used for compensating the volume difference between the rod cavity and the rodless cavity.
6. A controllable hydraulic damper based on magnetorheological rubber according to claim 1, wherein: and the outer wall of the magnetic field bracket is provided with a groove for installing the guide belt.
7. A controllable hydraulic damper based on magnetorheological rubber according to claim 1, wherein: and a through hole is formed in the bottom of the magnetic field bracket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022368407.3U CN213870886U (en) | 2020-10-22 | 2020-10-22 | Controllable hydraulic damper based on magnetorheological rubber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022368407.3U CN213870886U (en) | 2020-10-22 | 2020-10-22 | Controllable hydraulic damper based on magnetorheological rubber |
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| Publication Number | Publication Date |
|---|---|
| CN213870886U true CN213870886U (en) | 2021-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022368407.3U Expired - Fee Related CN213870886U (en) | 2020-10-22 | 2020-10-22 | Controllable hydraulic damper based on magnetorheological rubber |
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| Country | Link |
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| CN (1) | CN213870886U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112178108A (en) * | 2020-10-22 | 2021-01-05 | 华侨大学 | Controllable hydraulic damper based on magnetorheological rubber |
| CN115681391A (en) * | 2022-09-27 | 2023-02-03 | 重庆邮电大学 | Self-sensing self-energy-supply self-adaptive control magnetorheological elastomer vibration isolation system |
| CN112178108B (en) * | 2020-10-22 | 2024-07-02 | 华侨大学 | Controllable hydraulic damper based on magnetorheological rubber |
-
2020
- 2020-10-22 CN CN202022368407.3U patent/CN213870886U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112178108A (en) * | 2020-10-22 | 2021-01-05 | 华侨大学 | Controllable hydraulic damper based on magnetorheological rubber |
| CN112178108B (en) * | 2020-10-22 | 2024-07-02 | 华侨大学 | Controllable hydraulic damper based on magnetorheological rubber |
| CN115681391A (en) * | 2022-09-27 | 2023-02-03 | 重庆邮电大学 | Self-sensing self-energy-supply self-adaptive control magnetorheological elastomer vibration isolation system |
| CN115681391B (en) * | 2022-09-27 | 2024-05-10 | 重庆邮电大学 | Self-sensing self-energy-supply self-adaptive control magnetorheological elastomer vibration isolation system |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210803 |