Magnetorheological damper with built-in magnetorheological valve for damping performance control

Abstract

The invention discloses a magnetorheological damper with a built-in magnetorheological valve for damping performance control, which mainly comprises a piston rod, a piston cylinder, a damper cylinder body, a valve core, a floating piston, end covers, lifting lugs and the like. The piston rod, the damper cylinder body, the valve core, an excitation coil, cylinder liquid flow passages, and U-type liquid flow passages form the built-in magnetorheological valve. When the excitation coil is conductive, flowability of magnetorheological liquid inside effective damping gaps of the cylinder liquid flow passages and the U-type liquid flow passages is reduced due to electromagnetic effects, a pressure difference is formed between a first magnetorheological liquid accommodating cavity and a second magnetorheological liquid accommodating cavity, a damping force applied to the right end surface of the piston head changes, and the purpose that the magnetorheological valve controls the damping performance of the magnetorheological damper is realized. Due to the U-type liquid flow passages, the damping length is effectively increased, and the damping force adjustable range is increased. The magnetorheological damper is particularly suitable for being applied to a shock absorption system for a railway, a train, a bridge and the like, and has the advantages of large adjustment range, compact structure and small size.

Description

technical field [0001] The invention relates to a magnetorheological damper, in particular to a magnetorheological damper with a built-in magnetorheological valve for damping performance control. Background technique [0002] The magnetorheological damper is a new type of intelligent damping device widely used in semi-active control systems. Its characteristics of millisecond-level response speed, large control range and large damping force output make it an excellent semi-active actuator in industrial applications. At present, magnetorheological dampers have been widely used in vibration reduction and anti-seismic systems of buildings and bridges, and vibration reduction of railway rolling stock and automobile suspension systems. [0003] Magneto-rheological dampers are mainly used to control the vibration generated by system components to meet the requirements of various equipment for different working conditions and different environments. Therefore, the performance of ...

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

[0007] 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

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