Magneto-rheological damper with unidirectional damping characteristics

Abstract

The invention discloses a magneto-rheological damper with unidirectional damping characteristics, and relates to the technical field of devices for adjusting damping properties by changing fluid viscosity. It includes a damping cylinder, a one-way damping piston assembly, a coil assembly, a piston rod and magneto-rheological fluid; the one-way damping piston assembly includes a damping piston, a spring leaf and a gasket, and the damping piston is provided with a first annular through hole 1. A second annular through hole, where the coil assembly is provided with magneto-rheological fluid channels respectively communicating with the first annular through hole, and the coil assembly does not cover the second annular through hole. When the damping piston moves upwards, the spring plate seals the second annular through hole, and the magnetorheological fluid can only pass through the magnetorheological fluid channel under the action of the magnetic field. By adjusting the strength of the magnetic field, the adjustment of the damping force can be realized; the damping piston moves downward. When moving, the second annular through hole without magnetic field action is in an open state, so the damping force generated is very small, thereby realizing the one-way damping characteristic of the magneto-rheological damper.

Description

technical field [0001] The invention relates to the technical field of devices for adjusting damping properties by changing fluid viscosity, in particular to a magneto-rheological damper with unidirectional damping characteristics. Background technique [0002] The magnetorheological damper is a new type of semi-active damping device based on the controllable characteristics of the magnetorheological fluid. It has the advantages of fast response, simple structure, small size, and easy control. It is an ideal vibration isolation and vibration reduction device. , has broad application prospects in the field of vibration control. The common magnetorheological damper winds the electromagnetic coil on the piston of the damper, and at the same time, an annular channel is set on the piston or between the piston and the damping cylinder, and the magnetorheological fluid flows from the annular channel during operation. By generating a damping force, adjusting the current in the elec...

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Problems solved by technology

For the magnetorheological damper, its one-way damping characteristic can be realized by cutting off the current when the piston moves in a certain direction, but in order to meet a certain damping force requirement, the gap of the annular channel of the common magnetorheological damper is relatively small, so Even if there is no current and the magnetic field strength is zero, a certain damping force will still be generated when the piston moves

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