A magnetorheological elastomer decoupling membrane element

Abstract

The invention discloses a novel magneto-rheological elastomer decoupling membrane element. The novel magneto-rheological elastomer decoupling membrane element comprises a decoupling membrane, an exciting coil, a decoupling membrane upper cover plate and a decoupling membrane lower cover plate, wherein the decoupling membrane upper cover plate and the decoupling membrane lower cover plate are each provided with holes; the decoupling membrane is fixed between the upper cover plate and the lower cover plate; the upper cover plate and the lower cover plate are made of high-magnetic-conductivity materials, and a coil device is embedded in the decoupling membrane structure. The exciting coil, the upper cover plate, the lower cover plate and a magneto-rheological elastomer membrane jointly form a closed magnetic loop. The upper cover plate and the lower cover plate are provided with decoupling holes communicated with the magneto-rheological elastomer membrane. Liquid in a hydraulic suspension makes full contact with the magneto-rheological elastomer membrane through the decoupling holes, and the magnitude of a magnetic field in the magnetic loop is adjusted by controlling the magnitude of the current of the exciting coil, so that the dynamic stiffness of the magneto-rheological elastomer membrane is controlled in real time, and the purpose of broadband vibration isolation of the hydraulic suspension is achieved. According to the novel magneto-rheological elastomer decoupling membrane element, by means of the characteristics that the storage modulus and loss factors of a magneto-rheological elastomer change along with change of the magnetic field, the stiffness damping performance of the hydraulic suspension can be effectively changed, and therefore attenuation of vibration and noise of an automobile on different working conditions can be effectively realized in real time.

Description

technical field [0001] The invention belongs to the technical field of magnetorheological materials and their applications, and relates to a decoupling structure, in particular to a magnetorheological elastomer decoupling membrane element based on magnetorheological elastomers. Background technique [0002] The decoupling element is a crucial part. On the one hand, it is hoped that it can eliminate the adverse effects of dynamic hardening at high frequencies and small amplitudes, so that the suspension has low stiffness characteristics. Large damping effect when the suspension is at low frequency and large amplitude. However, the characteristics of the decoupling membrane of the conventional hydraulic mount decoupling element are fixed, and cannot be adjusted adaptively as the external conditions change. On the basis of overcoming the poor sedimentation stability of magnetorheological fluid, magnetorheological elastomers also have the characteristics of variable performance...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of contradictory suspension stiffness and damping performance during high and low frequency vibration isolation, this invention proposes a new type of hydraulic mount magnetorheological elastomer decoupling element, which has variable stiffness characteristics with the change of the magnetic field, and can effectively Change the stiffness and damping performance of the hydraulic mount, so that the vibration and noise attenuation of the vehicle under different working conditions is immediately effective

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