Variable damper magnetic circuit structure

Abstract

The invention discloses a variable damper magnetic circuit structure which comprises a piston cylinder. A piston rod is arranged in the piston cylinder; a piston sleeves outside the piston rod and tightly contacts an inner wall of the piston cylinder; a horizontal partition is arranged in the middle of the piston; sinking parts are arranged on the upper side and the lower side of the horizontal partition; the horizontal partition divides the piston in to an upper part and a lower part; a first coil winds on the upper part; a second coil winds on the lower part; the first coil and the second coil are connected with an inverse current; and a magnetorheological fluid is filled in the piston cylinder. According to the variable damper magnetic circuit structure provided by the invention, multiple magnet exciting coils wind on the piston, so that the magnitude of the magnetic flux can be increased, the effective length of the piston can be further increased, and a magnetic circuit becomes more uniform; during a codirectional current and the inverse current of the two-stage coil, the magnetic field utilization ratio is the highest, and a damping force can be remarkably improved.

Description

technical field [0001] The invention relates to a magnetic circuit structure of a variable damper. Background technique [0002] Magneto-rheological damper is an intelligent damping device, and its damping force can be remotely adjusted steplessly by controlling the power supply. The working medium of existing magnetorheological dampers is mostly magnetorheological fluid, and magnetorheological fluid It exhibits low viscosity characteristics under the condition of zero magnetic field; it exhibits different viscosities under the action of different strengths of magnetic fields. However, since the sedimentation of the suspended phase in the magnetorheological fluid will affect the performance of the device, for this reason, after the magnetorheological fluid, people have developed another magnetorheological material: magnetorheological grease, because magnetorheological grease Due to the special skeleton structure, the stability is very high, and the suspension phase will not...

AI Technical Summary

Problems solved by technology

When the excitation current and reluctance are given, the number of turns of the coil can only be increased, which will cause the increase of the piston window I=l, resulting in an increase in the overall structure of the piston

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