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Vibration damper with controllable stiffness and damping

A shock absorber and damping technology, which is applied in the field of mechanical shock absorbers, can solve the problems of increasing the difficulty of packaging, poor stability, and easy settlement of magnetorheological fluid, etc., and achieves the effect of simple structure

Inactive Publication Date: 2007-07-04
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the magnetorheological fluid is a liquid, which makes the structure of the entire shock absorber complex, and at the same time increases the difficulty of packaging, and the magnetorheological fluid itself is easy to settle and has poor stability.

Method used

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  • Vibration damper with controllable stiffness and damping
  • Vibration damper with controllable stiffness and damping
  • Vibration damper with controllable stiffness and damping

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] As shown in Fig. 1, the vibration damping system involved in the present invention includes an execution part (ie, a shock absorber) and a control part. Wherein the shock absorber is composed of an inner sleeve 1, an outer sleeve 2, a magnetorheological elastomer 3, an inner coil winding 4, an outer coil winding 5, and a magnetic resistance ring 6. The magnetorheological elastomer 3 is located between the inner sleeve 1 and the outer sleeve 2, and is fixedly connected to the inner sleeve 1 and the outer sleeve 2 at the same time. The inner sleeve 1 is a straight cylinder with a through hole in the center and a cavity inside, that is, the inner sleeve is in the shape of a ring (it can also be a suitable shape such as a rectangular ring, an elliptical ring, etc., to adapt to the shape of the vibration reduction object. or installation requirements, etc.). The cavity in the inner sleeve can be formed by a variety of processing methods, such as milling a circular groove co...

Embodiment 2

[0028] As shown in Fig. 2, in the shock absorber, the inner casing 1 and the outer casing 2 may also be cones, and the magnetorheological elastomer 3 between the inner and outer casings may also be a cone. The magnetorheological elastomer is vulcanized with the outer side of the inner sleeve and the inner side of the outer sleeve. Coil windings are respectively arranged in the inner and outer cavities. When the combination between the inner and outer coats and the elastic body is firm enough, the elastic body does not have to be of the same height as the inner and outer coats. With the cone, the elastic body is not only sheared but also squeezed. Adjusting the taper of the cone can adjust the degree of shearing and extrusion of the elastic body. In this way, not only the vibration excitation along the direction of the central axis can be damped, but also the vibration excitation perpendicular to the central axis can be damped to a certain extent, thus possessing the ability o...

Embodiment 3

[0030] As shown in Figure 3, in the shock absorber, the inner sleeve 1 can also be a cylinder with no through hole in the center and a cavity inside, that is, the inner sleeve is columnar (it can also be a suitable shape such as a rectangular column, an elliptical column, etc. , to adapt to the shape or installation requirements of the damping object, etc.). Other structures can be similar to Embodiment 1 or Embodiment 2, that is, the inner casing 1, the outer casing 2, and the magnetorheological elastomer 3 are all in the shape of a straight cylinder or a cone. The magnetorheological elastomer is vulcanized with the outer side of the inner sleeve and the inner side of the outer sleeve. When the combination between the inner and outer coats and the elastic body is firm enough, the elastic body does not have to be of the same height as the inner and outer coats. There are inner and outer coil windings respectively in the cavities of the inner and outer jackets. The inner slee...

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Abstract

The invention relates to a vibration isolator that the rigidity and damp could be controlled. The damp medium is magnetic current variable material. It is made up of inner sleeve, out sleeve, magnetic current variable elastomer, inner coil winding, out coil winding, and reluctance circle. Cavities are set in the inner sleeve and the out sleeve. The cavity in the inner sleeve has inner coil winding, and the cavity in the out sleeve has out coil winding. The inner sleeve is column shape or circularity. The magnetic current variable elastomer is circularity and is located outside the inner sleeve. The out sleeve is circularity and located outside the magnetic current variable elastomer. The magnetic current variable elastomer, the inner sleeve, and the out sleeve have the same center. And the magnetic current variable elastomer is fixed to the inner sleeve and the out sleeve. Hatches are set on the surface that the inner sleeve and the out sleeve connect to the magnetic current variable elastomer. The reluctance circles are set in the hatches. The invention is simple structure and good reliability.

Description

technical field [0001] The invention relates to a mechanical shock absorber, in particular to a shock absorber using a magneto-rheological material as a damping medium. Background technique [0002] Traditional shock absorbers (or vibration isolators) use rubber or metal springs as elastic bodies. Although the shock absorber with rubber as the elastic body has large damping, its bearing capacity is weak, and it has strict requirements on the environmental conditions; the shock absorber with various metal springs as the elastic body has the biggest advantage that it can be designed and manufactured according to people's requirements. The spring with this kind of stiffness has a strong ability to bear the load, but this kind of shock absorber generally has the weakness of large volume, large compression amount and almost no damping. Due to these reasons, people are limited by many conditions when choosing traditional shock absorbers. In order to meet the requirements of certa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16F9/30F16F15/03
Inventor 邓华夏龚兴龙张培强张先舟朱应顺
Owner UNIV OF SCI & TECH OF CHINA
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