CN110319150B - Magnetorheological elastomer-magnetorheological fluid composite shock absorber for rotary vibration - Google Patents
Magnetorheological elastomer-magnetorheological fluid composite shock absorber for rotary vibration Download PDFInfo
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- CN110319150B CN110319150B CN201910575372.XA CN201910575372A CN110319150B CN 110319150 B CN110319150 B CN 110319150B CN 201910575372 A CN201910575372 A CN 201910575372A CN 110319150 B CN110319150 B CN 110319150B
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- magnetorheological
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- elastomer
- pipeline
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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
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
- F16F15/18—Suppression of vibrations in rotating systems by making use of members moving with the system using electric, magnetic or electromagnetic means
Abstract
The invention discloses a magnetorheological elastomer-magnetorheological fluid composite shock absorber for rotary vibration, which comprises an annular magnetorheological elastomer, a rotary bracket, a coil, a pipeline, a sealing piece and magnetorheological fluid, wherein the annular magnetorheological elastomer is arranged on the rotary bracket; the annular magnetorheological elastomer is positioned at the center of the whole vibration isolator, and the inner ring is used for mounting a vibration shaft; a plurality of rotary brackets are fixed on the outer ring of the annular magnetorheological elastomer at equal intervals; the rotating bracket comprises an arc-shaped rod and a connecting rod; the arc-shaped rod is fixed on the outer ring of the annular magnetorheological elastomer through a connecting rod; sealing elements are fixed at both ends of the arc-shaped rod; an arc pipeline is sleeved between every two adjacent arc rods; the arc-shaped rod and the arc-shaped pipeline are sequentially connected into an annular structure; magnetorheological fluid is filled in the pipeline; the sealing elements are positioned in the two ends of the pipeline; the sealing element is closely contacted with the inner wall of the pipeline and can move relatively; a coil is wound on the connecting rod; the invention can change the transmission rate and the consumption rate of the vibration energy.
Description
Technical Field
The invention belongs to the field of vibration reduction, and particularly relates to a magnetorheological elastomer-magnetorheological fluid composite vibration absorber for rotary vibration.
Background
The magneto-rheological material is a novel intelligent material and has excellent magnetic control characteristics, and the magneto-rheological elastomer and the magneto-rheological fluid are two different magneto-rheological materials and respectively have the controllable characteristics of a stiffness magnetic field and a damping magnetic field, so that the magneto-rheological elastomer and the magneto-rheological fluid have great application potential in the field of vibration damping.
Some dampers designed using magnetorheological elastomers as damping elements and dampers designed using magnetorheological fluids as dissipative elements have been developed. However, the damper designed by using the magnetorheological elastomer as the damping element only has the controllable rigidity characteristic, can only change the transmission rate of vibration energy and cannot consume the vibration energy; the damper designed by taking the magnetorheological fluid as an energy consumption element only has the damping controllable characteristic, only can consume vibration energy and cannot reduce the transfer rate of changing the energy.
Disclosure of Invention
The invention aims to provide a magnetorheological elastomer-magnetorheological fluid composite shock absorber for rotary vibration, which overcomes the defect that the existing shock absorber can only adjust rigidity or damp, thereby realizing the purposes of changing the transmission rate of vibration energy and changing the consumption rate of the vibration energy.
The technical solution for realizing the purpose of the invention is as follows:
a magnetorheological elastomer-magnetorheological fluid composite damper for rotary vibration comprises an annular magnetorheological elastomer, a rotary bracket, a coil, a pipeline, a sealing element and magnetorheological fluid;
the annular magnetorheological elastomer is positioned at the center of the whole vibration isolator, and the inner ring is used for mounting a vibration shaft; a plurality of rotary brackets are fixed on the outer ring of the annular magnetorheological elastomer at equal intervals; the rotating bracket comprises an arc-shaped rod and a connecting rod; the arc-shaped rod is fixed on the outer ring of the annular magnetorheological elastomer through a connecting rod; sealing pieces are fixed at two ends of the arc-shaped rod; an arc pipeline is sleeved between every two adjacent arc rods; the arc-shaped rod and the arc-shaped pipeline are sequentially connected into an annular structure; magnetorheological fluid is filled in the pipeline; the sealing element is in close contact with the inner wall of the pipeline and can move relatively, and is used for sealing a certain amount of magnetorheological fluid in the pipeline; (ii) a And the connecting rod is wound with a coil and used for generating a control magnetic field to control the damping of the magnetorheological fluid and the rigidity of the annular magnetorheological elastomer.
Compared with the prior art, the invention has the following remarkable advantages:
(1) the magneto-rheological elastomer-magneto-rheological fluid composite shock absorber for rotary vibration disclosed by the invention is combined with the characteristic of variable rigidity of the magneto-rheological elastomer vibration isolator and the characteristic of variable damping of the magneto-rheological fluid damper, so that the magnetic field with controllable rigidity and damping is realized.
(2) The magnetorheological elastomer pipeline shock absorber is provided with the plurality of coils, and corresponding control algorithms can be designed according to different working conditions to carry out different current loading on the four coils, so that the flexibility of shock absorption is improved.
(3) The magneto-rheological elastomer pipeline shock absorber has a symmetrical structure and is convenient to process.
Drawings
FIG. 1 is a schematic view of the internal structure of the magnetorheological elastomer-magnetorheological fluid composite torsional damper of the present invention.
FIG. 2 is a schematic view of the overall structure of the magnetorheological elastomer-magnetorheological fluid composite torsional damper of the present invention.
FIG. 3 is a schematic view of the connection between the rotating bracket and the sealing member of the magnetorheological elastomer-magnetorheological fluid composite torsional damper of the present invention.
FIG. 4 is a schematic magnetic circuit diagram of the magnetorheological elastomer-magnetorheological fluid composite torsional damper of the present invention.
Detailed Description
The invention is further described with reference to the following figures and embodiments.
With reference to fig. 1, the magnetorheological elastomer-magnetorheological fluid composite damper for rotational vibration of the present invention comprises an annular magnetorheological elastomer 2, a rotating bracket 4, a coil 3, a pipeline 5, a sealing member 1, and magnetorheological fluid;
the annular magneto-rheological elastomer 2 is positioned at the center of the whole vibration isolator, the inner ring of the annular magneto-rheological elastomer is used for mounting a vibration shaft, and when the vibration shaft rotates and vibrates, the vibration is transmitted to the vibration isolator through the annular magneto-rheological elastomer 2; a plurality of rotary brackets are fixed on the outer ring of the annular magnetorheological elastomer 2 at equal intervals; the rotating bracket 4 comprises an arc-shaped rod 41 and a connecting rod 42; the arc-shaped rod 41 is fixed on the outer ring of the annular magnetorheological elastomer 2 through a connecting rod 42; the two ends of the arc-shaped rod 41 are both fixed with sealing pieces 1; an arc pipeline 5 is sleeved between two adjacent arc rods 41; the arc-shaped rod 41 and the arc-shaped pipeline 5 are sequentially connected into an annular structure; magnetorheological fluid is filled in the pipeline 5; the sealing elements 1 are positioned in the two ends of the pipeline 5 and are used for sealing a certain amount of magnetorheological fluid in the pipeline 5; the sealing element 1 is closely contacted with the inner wall of the pipeline 5 and can move relatively; the connecting rod 42 is wound with a coil 3 for generating a control magnetic field to control the damping of the magnetorheological fluid and the rigidity of the annular magnetorheological elastomer 2, so as to change the transmission rate of the vibration energy and the consumption rate of the vibration energy.
Examples
A magneto-rheological elastomer pipeline shock absorber comprises an annular magneto-rheological elastomer 2, a rotating bracket 4, four coils 3, four pipelines 5 filled with magneto-rheological fluid and eight rubber blocks serving as sealing pieces 1;
the annular magneto-rheological elastomer 2 is positioned at the center of the whole vibration isolator, the inner ring of the annular magneto-rheological elastomer is used for mounting a vibration shaft, and when the vibration shaft rotates and vibrates, the vibration is transmitted to the vibration isolator through the annular magneto-rheological elastomer 2; the inner ring of the rotating support 4 is fixedly connected with the outer ring of the annular magnetorheological elastomer 2 in a cementing manner and rotates along with the rotation of the annular magnetorheological elastomer 2, and the outer ring is fixedly connected with 8 rubber blocks in a cementing manner; the rubber blocks are tightly contacted with the inner wall of the pipeline 5 and can move relatively, and every two rubber blocks seal a certain amount of magnetorheological fluid in the pipeline 5; the four coils 3 are wound on the rotating bracket and used for generating a control magnetic field to control the damping of the magnetorheological fluid and the rigidity of the annular magnetorheological elastomer 2, so that the transmission rate of the vibration energy and the consumption rate of the vibration energy are changed.
Further, the rotating bracket 4 is made of a magnetic conductive material with good magnetic conductivity.
Further, the four pipelines 5 filled with the magnetorheological fluid adopt non-magnetic-conductive materials.
Further, the ring-shaped magnetorheological elastomer 2 is prepared by selecting magnetic particles with large magnetostriction coefficient and low magnetocrystalline anisotropy as magnetic filling particles; for example, Tb1-xDyxFe2 alloy is used as magnetic filling particles, 704 silicon rubber is used as a matrix, and dimethyl silicon oil is used as an additive, so that the relative magnetic permeability can be obviously improved.
The working principle of the shearing performance testing device of the magnetorheological elastomer is as follows:
when the magnetorheological damper is used, the pipeline 5 is fixed, the vibration shaft is arranged in the inner ring of the annular magnetorheological elastomer 2, and when the shaft is stable (does not do rotary vibration), current is not conducted in the coil on the rotary support 4. When the shaft rotates left and right, the rotary vibration is transmitted to the annular magnetorheological elastomer 2, so that the rotary support 4 is driven to rotate, the rubber block arranged on the rotary support 4 pushes the magnetorheological fluid to flow, certain damping force is generated, and vibration energy is consumed. When the coil wound on the rotating bracket 4 is electrified, a magnetic field loop is generated, and a plurality of fan-shaped loops (as shown in fig. 4) are formed among the magnetorheological fluid, the rotating bracket 4 and the annular magnetorheological elastomer 2 so as to change the damping of the magnetorheological fluid and the rigidity of the annular magnetorheological elastomer 2, thereby changing the consumption rate and the transmission rate of the vibration energy. Corresponding control algorithms can be designed according to different vibration conditions, and the rigidity of the annular magnetorheological elastomer 2 and the damping of the magnetorheological fluid can be changed in real time by changing the magnitude of the current in each coil, so that the aims of vibration isolation and vibration reduction are fulfilled.
Claims (4)
1. A magnetorheological elastomer-magnetorheological fluid composite damper for rotary vibration is characterized by comprising an annular magnetorheological elastomer (2), a rotary bracket (4), a coil (3), an arc-shaped pipeline (5), a sealing element (1) and magnetorheological fluid;
the annular magnetorheological elastomer (2) is positioned at the center of the whole vibration isolator, and the inner ring is used for mounting a vibration shaft; a plurality of rotary brackets are fixed on the outer ring of the annular magnetorheological elastomer (2) at equal intervals; the rotating bracket (4) comprises an arc-shaped rod (41) and a connecting rod (42); the arc-shaped rod (41) is fixed on the outer ring of the annular magnetorheological elastomer (2) through a connecting rod (42); sealing pieces (1) are fixed at two ends of the arc-shaped rod (41); an arc pipeline (5) is sleeved between two adjacent arc rods (41); the arc-shaped rod (41) and the arc-shaped pipeline (5) are sequentially connected into an annular structure; magnetorheological fluid is filled in the arc-shaped pipeline (5); the sealing element (1) is in close contact with the inner wall of the arc-shaped pipeline (5) and can move relatively, and is used for sealing a certain amount of magnetorheological fluid in the arc-shaped pipeline (5); the connecting rod (42) is wound with a coil (3) and used for generating a control magnetic field to control the damping of the magnetorheological fluid and the rigidity of the annular magnetorheological elastomer (2).
2. Vibration damper according to claim 1, characterized in that the rotating bracket (4) is made of magnetically conductive material.
3. Shock absorber according to claim 1, wherein said arcuate duct (5) is of non-magnetically conductive material.
4. Shock absorber according to claim 1, wherein said annular magnetorheological elastomer (2) selects magnetic particles with a large magnetostriction coefficient and a low magnetocrystalline anisotropy as the magnetic filler particles.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910575372.XA CN110319150B (en) | 2019-06-28 | 2019-06-28 | Magnetorheological elastomer-magnetorheological fluid composite shock absorber for rotary vibration |
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| CN201910575372.XA CN110319150B (en) | 2019-06-28 | 2019-06-28 | Magnetorheological elastomer-magnetorheological fluid composite shock absorber for rotary vibration |
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| CN110319150A CN110319150A (en) | 2019-10-11 |
| CN110319150B true CN110319150B (en) | 2020-12-04 |
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| CN112405594B (en) * | 2020-11-10 | 2022-02-01 | 珠海格力电器股份有限公司 | Robot joint vibration damping device and robot |
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| EP2065614A1 (en) * | 2007-11-28 | 2009-06-03 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Magnetorhelogical force transmission device |
| WO2010102575A1 (en) * | 2009-03-11 | 2010-09-16 | The Chinese University Of Hong Kong | Magnetorheological actuator with multiple functions |
| KR101724747B1 (en) * | 2011-11-23 | 2017-04-10 | 현대자동차주식회사 | Variable differential mount system applied Magnetorheological Elastomer |
| KR101628612B1 (en) * | 2015-03-31 | 2016-06-08 | 현대자동차주식회사 | Commercial Vehicles secondary brakes using MR fluid |
| CN105599536B (en) * | 2016-03-08 | 2018-03-20 | 武汉理工大学 | A kind of variable-diameter hub for vehicle wheel |
| CN108278319A (en) * | 2017-12-01 | 2018-07-13 | 北京理工大学 | A kind of dynamical system broadband magnetic rheology elastic body dynamic tuning bump leveller |
| CN108708930B (en) * | 2018-07-20 | 2023-10-31 | 南京理工大学 | Magnetorheological elastomer pipeline damper |
| CN109235688B (en) * | 2018-11-07 | 2019-04-19 | 山东大学 | A kind of magnetorheological half active stiffness adjustable shock absorber |
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