Novel anti-settling magnetorheological fluid damper

Abstract

The invention provides a novel anti-settling magnetorheological fluid damper. The novel anti-setting magnetorheological fluid damper comprises a shell and a piston arranged in the shell. The shell isfilled with magnetorheological fluid. Annular excitation coils are embedded into the inner and outer surfaces of the piston. An annular permanent magnet embedded into the piston is arranged on the inner side of each excitation coil. The periphery of the piston is sleeved with a magnetic conducting ring. The magnetic conducting ring is connected with the piston through a connecting rod. The magnetic conducting ring is in clearance fit with the inner wall of the shell. The damper not only can realize variable-damping semi-active control to meet the working condition application, but also can fully utilize the maximum magnetic field area originally acting in the piston shell, a traditional magnetic conductive closed-loop magnetic circuit is changed so that the damper can act on the magnetorheological fluid, the anti-settling property of the magnetorheological fluid is enhanced, and the magnetic energy heating of a cylinder barrel is reduced. By the adoption of the embedded permanent magnet design, it is ensured that the damper also has the magnetic field output under the non-current condition, the anti-settling purpose is realized through the action of a magnetic field, the service life of the damper is prolonged, and longer stability performance is maintained; and meanwhile, the embedding of permanent magnets can also make the damper perform bidirectional adjustment of magnetization and demagnetization.

Description

technical field [0001] The patent of the present invention relates to a magnetorheological fluid damper, in particular to a novel magnetorheological fluid damper with an anti-settling structure for the damper. Background technique [0002] With the development of modern society, a variety of new materials with unique properties emerge in an endless stream. Magnetorheological fluids have shown outstanding application value in many new materials due to their magnetorheological effects, and have attracted the attention of the research community. In the absence of an external magnetic field, the magnetorheological fluid has good fluidity. After adding an external magnetic field, it can be chained in a very short time, showing solid characteristics, and has a high yield shear force, and its The solid properties can also be adjusted by the strength of the external magnetic field; after the magnetic field is removed, the fluidity can be restored immediately. This characteristic of...

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Problems solved by technology

[0005] The technical problem to be solved by the patent of the present invention is that the magnetorheological fluid inside the existing magnetorheological damper has insufficient sedimentation stability and is prone to sedimentation and has a short service life. According to the current state of the art, this invention proposes a new anti-settling magnetorheological fluid A liquid damper, which embeds a permanent magnet in the damper piston and changes the closed-loop magnetic circuit structure of the traditional magnetorheological damper

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