Piston and self-adaptive damping adjustment type permanent-magnet magneto-rheological fluid damper

Abstract

The invention belongs to the field of dampers and discloses a piston and a self-adaptive damping adjustment type permanent-magnet magneto-rheological fluid damper. The piston body comprises an inner piston and an outer piston, the outer piston externally sleeves the inner piston, the inner piston is axially provided with a through hole along the center line direction, and a magnet is arranged in the through hole. A piston rod is connected with the piston body coaxially and is axially provided with a blind hole along the center line direction, an adjusting rod connected with the magnet is arranged in the blind hole, the outer surface of the adjusting rod is provided with a convex ball, and the position, matched with the ball, of the inner wall of the piston rod is provided with a corresponding curved rail composed of three sections, wherein a first section and a third section are arc and symmetrical relative to a middle section which is straight. The piston and the self-adaptive damping adjustment type permanent-magnet magneto-rheological fluid damper have advantages that self-adaptive adjustment of damping force according to load sizes and slide strokes can be realized; due to a pure mechanical structure, wide application range, structural simplicity and high reliability are realized.

Description

technical field [0001] The invention belongs to the field of dampers, and more particularly, relates to a piston and a permanent magnet magnetorheological fluid damper with adaptive damping adjustment. Background technique [0002] Magnetorheological damper is a new type of damper with excellent market prospects, which has the advantages of controllable damping, small size and high efficiency. The magnetorheological damper can adjust the damping force by controlling the magnetic field to make the magnetorheological fluid change rapidly (in millisecond time) between a Newtonian liquid with good fluidity and a Bingham plastic solid with high viscosity and low fluidity. The magnetorheological dampers currently available on the market can be divided into electromagnetic magnetorheological dampers and permanent magnet magnetorheological dampers according to the properties of the magnets used. Electromagnetically adjustable magnetorheological dampers, such as the RD-1005 magnetor...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a permanent magnet magneto-rheological fluid damper with piston and adaptive damping adjustment, through the design of the curved track and permanent magnet in the piston rod, thus solving The technical problem that the adaptive adjustment of the rotation of the magnet and the damping coefficient need to be adjusted manually

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