Magnetic rheology elastic body active-passive integrated damper based on extrusion type applied force

Abstract

The invention relates to a magnetorheological elastomer active and passive integrated damper based on an extrusion type stress, which belongs to the structure vibration isolation and control field, wherein a magnetorheological elastomer is arranged in a magnetic conductive sleeve; the upside of the magnetorheological elastomer is connected with a joint lever; the lower part of the magnetorheological elastomer is fixedly connected with a lower positioning plate; a groove is arranged on an outer circumferential surface of the magnetic conductive sleeve positioned in a permanent magnet, embedded with a coil winding and positioned and fixed by an upper positioning plate and the lower positioning plate; the permanent magnet, the upper positioning plate, the lower positioning plate and the lower part of the joint lever are arranged in an outer magnet isolating cylinder; the upside of the outer magnet isolating cylinder is provided with an upper end closure; the upper part of the joint lever extends out from a pylome of the upper end closure and is connected with a controlled object; a pretightening spring is sleeved on the joint lever; the bottom of the outer magnet isolating cylinder is provided with a lower end closure; a sensor is fixed on the joint lever and connected with a power amplifier through a control unit module; the power amplifier is connected with the coil winding through cables. The magnetorheological elastomer active and passive integrated damper has large bearing capacity, a simple structure and can be automatically suitable for active and passive vibration control and has wide application range.

Description

technical field [0001] The invention relates to a shock absorber in the technical field of mechanical structures, in particular to a magnetorheological elastomer active and passive integrated shock absorber based on extrusion force. Background technique [0002] Traditional shock absorbers generally use ordinary rubber or metal springs as elastic elements, and use the energy loss of rubber or springs during movement to suppress structural vibrations. Although this type of shock absorber has the advantages of simple structure, easy realization, economy and reliability, etc., once its structural parameters are set, they cannot be changed. It cannot guarantee the optimal performance, lacks the flexibility of control, and cannot adapt to the wide-frequency vibration occasions with a large range of external excitation changes. [0003] As a smart material with controllable rheological properties, electro / magnetorheological materials have the characteristics of continuous adjustm...

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Problems solved by technology

[0004] After searching the literature of the prior art, it is found that in recent years, some people have used the unique characteristics of electro / magneto-rheological materials to design active and passive integrated shock absorbers. For example, Chinese patent 99810493.0 uses the controllable flow However, the electro / magnetorheological fluid is a suspension material composed of dispersed phase particles and base fluid, which has the disadvantages of easy settlement, poor stability and difficult sealing, and has certain limitations.

However, the Chinese patent 200510038642.1 proposes a shock absorber using magneto-rheological elastomers, but the structure it adopts is a shearing stress mode, that is, the magnetorheological elastomer material is subjected to shear force. The type has the disadvantage of small bearing capacity, so it is not suitable for vibration control of heavy-duty micro-vibration structures

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