Multistage spiral magnetorheological absorber piston assembly

Abstract

The invention discloses a multistage spiral magnetorheological absorber piston assembly. The piston assembly mainly comprises a piston rod, a piston, a sealing ring and a coil, wherein the piston is fixed at the end part of the piston rod through a bolt; the sealing ring and the coil are embedded in a groove of the outer surface of the piston; the sealing ring is used for isolating oil in an upper cavity from that in a lower cavity of the piston; the coil can generate a magnetic field when electrified; the magnetic field direction is perpendicular to a spiral runner in the piston to regulate the viscosity of magnetorheological fluid flowing through the runner, so as to change the damping force of the whole absorber. The influence of the magnetic field on the magnetorheological fluid in the spiral runner is maximal theoretically, and the action area of the magnetic field is wider, so that the damping force regulating range can be enlarged to a large extent, multistage control of the damping force can be implemented, the regulating range of the damping force can be enlarged by more spiral runners, and the coil turns can be appropriately reduced. Therefore, the heat value is lowered, and the service life is prolonged.

Description

technical field [0001] The invention belongs to the technical field of shock absorbers, and in particular relates to a high-efficiency multistage spiral magnetorheological shock absorber piston assembly. Background technique [0002] Common shock absorbers are provided with expansion valves, compression valves, compensation valves and flow valves. When the frame (or load-bearing body) moves relative to the axle, the piston of the shock absorber will reciprocate in the cylinder, and the oil in the working chamber will pass through the valve systems to generate damping force, thereby attenuating the ground and Engine vibration and shock. The size of its damping depends on the elasticity of each valve plate group. After the shock absorber valve plate is assembled, the damping performance of the shock absorber is determined, and its performance generally cannot be automatically adjusted according to the working conditions during the driving of the vehicle. . [0003] The magn...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problem that the damping force adjustment range of traditional magnetorheological shock absorbers is too small, and to provide a high-efficiency multi-stage spiral magnetorheological shock absorber piston assembly

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