CN112178108B - Controllable hydraulic damper based on magnetorheological rubber - Google Patents
Controllable hydraulic damper based on magnetorheological rubber Download PDFInfo
- Publication number
- CN112178108B CN112178108B CN202011138559.2A CN202011138559A CN112178108B CN 112178108 B CN112178108 B CN 112178108B CN 202011138559 A CN202011138559 A CN 202011138559A CN 112178108 B CN112178108 B CN 112178108B
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- Prior art keywords
- magnetic field
- bracket
- hydraulic cylinder
- rubber ring
- coil
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- 229920001971 elastomer Polymers 0.000 title claims abstract description 66
- 238000013016 damping Methods 0.000 claims abstract description 38
- 230000035699 permeability Effects 0.000 claims abstract description 8
- 230000009471 action Effects 0.000 claims abstract description 5
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 239000011159 matrix material Substances 0.000 claims description 6
- 229920002379 silicone rubber Polymers 0.000 claims description 6
- 239000004945 silicone rubber Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 230000003197 catalytic effect Effects 0.000 claims description 3
- 230000006698 induction Effects 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 230000009286 beneficial effect Effects 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
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000013017 mechanical damping Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention 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 composed of the magnetic field, the magnetorheological rubber ring and the piston rod slides in the hydraulic cylinder, and the hydraulic cylinder is divided into a rod cavity and a rodless cavity; an annular flow passage 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, and the annular flow passage area can be adjusted by controlling the size of the magnetic field, so that damping force adjustment is realized. By the technical scheme, damping can be continuously adjustable, and design of active and semi-active damping systems is facilitated.
Description
Technical Field
The invention relates to the technical field of damper systems, in particular to a controllable hydraulic damper based on magnetorheological 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 damping mode based on the variable damping device is used as a semi-active damping mode with low energy consumption and low cost, and is a vibration control mode with wider application, so the variable damping device is always an important point of the design of a controllable damping system.
Taking a vehicle damping system-a suspension system as an example, a variable damping device which is widely applied at present is mainly a magnetorheological fluid damper and a mechanical damping adjustment damper based on the opening degree of a damping valve. The magnetorheological fluid has the advantages of low energy consumption, large damping force per unit size, high response speed, continuously adjustable damping force and the like, and is widely paid attention to people; however, at present, the problems of suspension property, denaturation and the like of the magneto-rheological fluid are caused by the limitation of the manufacturing technology, so that the wide application of related products is limited. The mechanical damping adjusting shock absorber based on the opening degree of the damping valve has the defects of discontinuous damping adjustment, low system frequency response speed, large device volume and the like although the implementation mode is simple.
Disclosure of Invention
The invention aims to provide a controllable hydraulic damper based on magnetorheological rubber, which is continuously adjustable in damping and is beneficial to the design of active and semi-active damping systems.
In order to solve the technical problems, the invention 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 composed of the magnetic field, the magnetorheological rubber ring and the piston rod slides in the hydraulic cylinder, and the hydraulic cylinder is divided into a rod cavity and a rodless cavity; an annular flow passage 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, and the annular flow passage area can be adjusted by controlling the size of the magnetic field, so that damping force adjustment is realized.
In a preferred embodiment: the coil is wound on a coil support, and the magnetic field support is sleeved outside the coil and the coil support; and a clamping ring is arranged on the 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 the clamping ring; and a connecting piece is arranged at the end part of the magnetic field bracket and used for connecting the piston rod.
In a preferred embodiment: the magnetorheological rubber ring is prepared by mixing carbonyl iron powder and a silicone rubber matrix, and is prepared under the thermal catalytic curing process in an annular die, and the arrangement of carbonyl iron powder particles in the silicone rubber matrix has a chain structure.
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: the bottom of the hydraulic cylinder is provided with a rubber diaphragm for compensating the volume difference between the rod cavity and the rodless cavity.
In a preferred embodiment: the outer wall of the magnetic field support 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.
In a preferred embodiment: the magnetic field creates a closed magnetic induction line between the magnetic field support and the magnetorheological rubber ring.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
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 passage is increased, the damping parameter adjustment of the damper is achieved, the damping is continuously adjustable, and the damper has higher frequency response characteristics.
2. By taking the magnetorheological rubber as an actuator and changing the material proportion in the manufacturing process of the magnetorheological rubber ring, the material characteristics of different moduli, shearing coefficients and the like under the same magnetic field condition can be realized, so that the damping characteristic of the damper is changed, the design flexibility is higher, and the design of a semi-active damping system is facilitated.
3. The magnetorheological rubber is used as an actuator, so that the defects of deposition denaturation and the like of the magnetorheological fluid used as a controlled element are avoided, 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 hydraulic cylinder not only serves as a driving and executing device, but also serves as a main piston stress effect of the hydraulic cylinder, and the integration level of the system is improved.
Drawings
FIG. 1 is a cross-sectional view of the overall structure of a controllable hydraulic damper based on magnetorheological rubber in a preferred embodiment of the present invention;
FIG. 2 is a top view of a magnetic field bracket and a magnetorheological rubber ring when a coil of a controllable hydraulic damper based on magnetorheological rubber in a preferred embodiment of the present invention is not energized;
FIG. 3 is a top view of a magnetic field bracket and a magnetorheological rubber ring when a coil is energized in a controllable hydraulic damper based on magnetorheological rubber in a preferred embodiment of the invention.
Detailed Description
The invention is further described below with reference to the drawings and detailed description.
Referring to fig. 1, a controllable hydraulic damper based on a magnetorheological rubber ring comprises a magnetic field, the magnetorheological rubber ring 11, a hydraulic cylinder and a piston rod 1; the magnetic field consists 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 11 is an annular rubber part made of carbon-based iron powder and a silicone rubber matrix, and is made by a thermal catalytic curing process in an annular die, and the arrangement of carbonyl iron powder particles in the silicone rubber matrix has a chain structure; the hydraulic cylinder consists of a sealing ring 2, a hydraulic cylinder body 3, a rubber diaphragm 6 and a hydraulic cylinder end cover 7.
The interconnection relationship of the constituent components is as follows:
After the coil 9 is wound on the coil support 8, the coil support 5 is sleeved, a clamping ring 10 is arranged on the central shaft of the coil support 5 to fix the axial position of the coil support 8 on the magnetic support 5, then a magnetorheological rubber ring 11 is sleeved on the central shaft of the magnetic support 8, and the clamping ring is arranged on the central shaft of the magnetic support 5 to fix the coil support so that the coil support 8 and the magnetic support 5 are coaxially arranged. One end of the piston rod 1 is provided with a chuck for fixing the axial position of the magnetorheological rubber ring 11. And 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 and sleeved from bottom to top, so that a piston rod passes through a central hole of the upper end surface of the hydraulic cylinder body 3, and a 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 a rod cavity and a rodless cavity; the cylinder end cap 7 is then screwed onto the cylinder block 3.
The magnetic field comprises a magnetic field bracket 5, a coil 9 and a coil bracket 8, wherein the magnetic field bracket has high magnetic permeability; 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 composed of the coil 9, the magnetorheological rubber ring 11 and the piston rod 1 slides in the hydraulic cylinder 3, and the hydraulic cylinder 3 is divided into a rod cavity and a rodless cavity; an annular flow passage 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 creates a closed magnetic induction line between the magnetic field support and the magnetorheological rubber ring 11. The magnetorheological rubber ring 11 deforms under the action of the magnetic field of the coil 9, and the annular flow passage area can be adjusted by controlling the size of the coil 9, so that damping force adjustment is realized.
The specific working principle of the invention is as follows:
When the vehicle runs, the road disturbance causes the relative displacement between the piston rod 1 of the damper and the connecting part thereof and the hydraulic cylinder body 3, so that the oil liquid in the rod cavity and the rodless cavity is forced to flow mutually through the annular gap 12, and the viscous friction force generated by the oil liquid through the annular gap causes the pressure difference between the rod cavity and the rodless cavity, so that the damping force is formed, and the effects of dissipating the road disturbance energy and damping vibration are achieved.
The damping coefficient of the damper can be adjusted by adjusting the area of the annular gap 12, so that the aim of damping adjustment is fulfilled. When the coil 9 is not energized, the magnetorheological rubber ring 11 is not subjected to a magnetic field and is in its original size, as shown in fig. 2. When the coil is electrified, the magnetorheological rubber ring 11 is acted by 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 increases gradually, the annular gap 12 decreases gradually until it closes.
Since the piston rod 1 causes a difference in area between the rod-like and rod-free chambers, when the damper is in operation, the difference in oil liquid volume entering the rod-like and rod-free chambers will be volume compensated by the expansion or rebound of the rubber diaphragm 6.
The specific control process of the invention is as follows:
According to the invention, the intensity of the magnetic field borne by the magnetorheological rubber ring 11 is changed by adjusting the power-on current of the coil 9, so that the area of the annular gap 12 through which oil flows is changed, and the damping coefficient is changed, thereby realizing the ideal damping level. When a larger damping force is required for the shock absorbing system, the energizing current of the coil 9 is increased. And conversely, the number is reduced. In addition, the damping coefficient of the damper can be controlled by changing the material proportion when the magnetorheological rubber ring is prepared and controlling the material properties of the magnetorheological rubber ring such as different moduli, shearing coefficients and the like under the condition of the same magnetic field intensity.
In summary, the design of the present invention focuses on:
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 liquid is changed, and the function of adjusting a damping coefficient is achieved. The area of the annular gap 12 can be continuously adjusted by adjusting the size of the energizing current, the function of continuously adjusting damping can be realized, and the frequency response speed of control can be improved by using a magnetic field driving mode.
The foregoing is only a preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any person skilled in the art will be able to make insubstantial modifications of the present invention within the scope of the present invention disclosed herein by this concept, which falls within the actions of invading the protection scope of the present invention.
Claims (1)
1. A controllable hydraulic damper based on magnetorheological rubber comprises a magnetic field, a magnetorheological rubber ring, a hydraulic cylinder and a piston rod; the magnetic field consists of a magnetic field bracket, a coil, a clamping ring and a guide belt; the magnetorheological rubber ring is an annular rubber piece made of carbon-based iron powder and a silicone rubber matrix, and is made under the thermal catalytic curing process in an annular die, and the arrangement of carbonyl iron powder particles in the silicone rubber matrix has a chain structure; the hydraulic cylinder consists of a sealing ring, a hydraulic cylinder body, a rubber diaphragm and a hydraulic cylinder end cover; after the coil is wound on the coil bracket, the coil bracket is sleeved in the magnetic field bracket, a clamping ring is arranged on the central shaft of the magnetic field bracket to fix the axial position of the coil bracket on the magnetic field bracket, then the magnetorheological rubber ring is sleeved on the central shaft of the magnetic field bracket, and the clamping ring is arranged on the central shaft of the magnetic field bracket to fix the coil bracket so that the coil bracket and the magnetic field bracket are coaxially arranged; one end of the piston rod is provided with a chuck for fixing the axial position of the magnetorheological rubber ring; the piston rod is connected with the magnetic field bracket through threads; the outer wall of the magnetic field support is provided with a groove for installing a guide belt, the outer side surface of the magnetic field support is sleeved with the guide belt from bottom to top, a piston rod penetrates through a central hole provided with a sealing ring on the upper end surface of the hydraulic cylinder body, and then a rubber diaphragm is placed on the lower end surface of the hydraulic cylinder body and used for compensating the volume difference between a rod cavity and a rodless cavity; then screwing the hydraulic cylinder end cover onto the hydraulic cylinder body; 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 bottom of the magnetic field bracket is provided with a through hole; the device composed of the magnetic field, the magnetorheological rubber ring and the piston rod slides in the hydraulic cylinder, and the hydraulic cylinder is divided into a rod cavity and a rodless cavity; an annular flow passage 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 magnetic field generates a closed magnetic induction line between the magnetic field bracket and the magnetorheological rubber ring; the magnetorheological rubber ring deforms under the action of the magnetic field, and the annular flow passage area can be adjusted by controlling the size of the magnetic field, so that damping force adjustment is realized.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011138559.2A CN112178108B (en) | 2020-10-22 | 2020-10-22 | Controllable hydraulic damper based on magnetorheological rubber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011138559.2A CN112178108B (en) | 2020-10-22 | 2020-10-22 | Controllable hydraulic damper based on magnetorheological rubber |
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| CN112178108A CN112178108A (en) | 2021-01-05 |
| CN112178108B true CN112178108B (en) | 2024-07-02 |
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| CN202011138559.2A Active CN112178108B (en) | 2020-10-22 | 2020-10-22 | Controllable hydraulic damper based on magnetorheological rubber |
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| CN113864383B (en) * | 2021-08-31 | 2023-01-10 | 湖南科技大学 | Anti-deposition magnetorheological fluid and anti-deposition method for magnetorheological damper |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN213870886U (en) * | 2020-10-22 | 2021-08-03 | 华侨大学 | Controllable hydraulic damper based on magnetorheological rubber |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101235864B (en) * | 2008-02-04 | 2011-11-16 | 华侨大学 | Shearing type MR fluid shock absorber |
| CN101709762B (en) * | 2009-11-20 | 2014-10-22 | 华侨大学 | Magnetic-rheologic rubber shock absorber with corrugated cylindrical surface |
| CN112805489B (en) * | 2018-10-10 | 2023-06-20 | 南华大学 | A dual-rod piezoelectric-magnetorheological composite intelligent damper and its control method |
| CN110107640B (en) * | 2019-05-27 | 2024-02-09 | 江西科技学院 | Shock absorber device and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN213870886U (en) * | 2020-10-22 | 2021-08-03 | 华侨大学 | Controllable hydraulic damper based on magnetorheological rubber |
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