A magneto-rheological damper with a mixed-flow liquid flow channel

Abstract

The invention discloses a magneto-rheological damper with a mixed-flow liquid flow channel, which mainly consists of a piston rod, a damper end cover, a sleeve, a piston end cover, a valve sleeve, a valve core, a floating piston, an excitation coil, a positioning Disc, magnetic disc and lifting lugs and other components. The liquid flow channel between the left magnetic disc, the valve sleeve and the valve core constitutes the effective damping gap of the first segment and the second segment; the liquid flow channel between the right magnetic conductive disc and the valve core constitutes the third segment and the fourth segment. effective damping gap; when the excitation coil conducts electricity, a certain size of the magnetic field will be generated in the four effective damping gaps, and the magnetorheological fluid flowing through the four damping gaps will increase in viscosity and yield stress. A pressure difference is formed between chamber I and chamber II. Effective control of the damping force can be achieved by controlling the magnitude of the applied current. The magneto-rheological damper has a large dynamic adjustment range of damping force, a simple structure and a small volume, and is especially suitable for vibration reduction and anti-seismic systems of structures such as railways, automobiles, and bridges.

Description

technical field [0001] The invention relates to a magneto-rheological damper, in particular to a magneto-rheological damper with a mixed-flow liquid flow channel. Background technique [0002] The magnetorheological damper is a new type of intelligent damping device widely used in semi-active control systems. It mainly applies a certain amount of current to the excitation coil in the winding groove of the damper piston to generate a magnetic field to change the yield strength of the magnetorheological fluid flowing through the liquid flow channel, thereby dynamically changing the output damping force. [0003] The characteristics of millisecond-level response speed, large control range and large damping force output of the magneto-rheological damper make it an excellent semi-active actuator in the field of industrial applications. At present, magnetorheological dampers have been widely used in vibration reduction and anti-seismic systems of buildings and bridges, and vibrat...

AI Technical Summary

Problems solved by technology

A common method is to reduce the width of the damping gap of the magnetorheological damper. However, when the magnetorheological fluid is left unused for a long time and is used again, particles are prone to precipitate and block the damping gap, resulting in the failure of the magnetorheological damper.

The second is to increase the length of the effective damping gap, but this will significantly increase the volume of the magnetorheological damper, occupy more installation and use space, and increase the manufacturing cost accordingly

[0006] Based on this, in the actual design process, it is difficult to simultaneously increase the magnetic induction intensity in the effective damping gap and increase the length of the effective damping gap

Images