Novel magneto-rheological damper

Abstract

The invention discloses a novel magneto-rheological damper, which comprises a working cylinder body, a piston rod and a piston arranged in the working cylinder body, wherein the piston is coaxially sleeved outside the piston rod; the piston rod drives the piston to move in the working cylinder body; two sealing bodies are arranged in the working cylinder; the region between the two sealing bodies forms a motion region of the piston; the motion region of the piston is filled with a magneto-rheological fluid; two axially distributed piston annular grooves are circumferentially arranged on the piston; a permanent magnetic ring is arranged in the piston annular groove; an annular insulating layer is arranged outside the permanent magnetic ring; an excitation coil is wound outside the annular insulating layer; and the outer circumference of the excitation coil is in contact with the inner circumferential wall of the working cylinder body. The novel magneto-rheological damper has the advantages that by arranging the permanent magnetic rings in the piston grooves of the piston, and by further arranging the excitation coils outside the permanent magnetic rings, the magnetic field generated when electric current passes through the excitation coils during the operation of the magneto-rheological damper can be effectively enhanced, thus the damping force of the magneto-rheological liquid at a controllable state in the working cylinder body can be increased.

Description

technical field [0001] The invention relates to a damper, in particular to a novel magnetorheological damper. Background technique [0002] Due to the influence of wind, wind and rain, or other external loads on cable-stayed bridges, the cable-stayed cables will vibrate to a large extent, which will cause fatigue of the cable-stayed cables, shorten their life, and even cause major accidents such as bridge collapse. Therefore, in order to reduce the vibration of the stay cable, various control measures have been taken for the vibration of the stay cable, among which the more common method is to achieve the purpose of vibration reduction by absorbing energy through the damper. [0003] In recent decades, the development of controllable dampers using magnetorheological or electrorheological technology has become more and more rapid, and the application of magnetorheological dampers or electrorheological dampers in the field of vibration control has become more and more extensi...

AI Technical Summary

Problems solved by technology

However, when this kind of magnetorheological damper works, the magnetic field when the excitation coil passes the current is relatively weak, and the controllable damping effect of the magnetorheological fluid needs to be improved; The response speed of the peripheral control circuit of the rheological damper is not fast enough, which affects the working safety characteristics

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