High-frequency-response damping-adjustable semi-active shock absorber

Abstract

The invention relates to a high-frequency-response damping-adjustable semi-active shock absorber which comprises an oil storage cylinder, a working cylinder, a piston rod and a bypass oil way. A conduction one-way valve is arranged between the working cylinder and the oil storage cylinder, and the two ends of the conduction one-way valve communicate with the lower end of the working cylinder and the interior of the oil storage cylinder correspondingly. A piston body is provided with a through hole and a piston one-way valve which enable an upper cavity and a lower cavity to communicate with each other, the bypass oil way comprises a first branch oil way, a second branch oil way and a third branch oil way which are arranged in parallel, the first branch oil way is connected with a first switch valve and a first pilot valve in series, the second branch oil way is provided with a second switch valve, and a first overflow valve is arranged on the third branch oil way. The high-frequency-response damping-adjustable semi-active shock absorber aims to solve or at least relieve the problem that a traditional passive oil pressure shock absorber cannot be adjusted in real time according to vehicle loads and line conditions.

Description

technical field [0001] The invention relates to the technical field of shock absorbers, in particular to a high frequency response damping adjustable semi-active shock absorber. Background technique [0002] With the rapid development of railway scale and mileage in my country, high-speed rail vehicles have higher and higher requirements for ride comfort and running stability. At present, the rail vehicle shock absorbers are all traditional passive hydraulic shock absorbers. The damping characteristics of the shock absorbers are fixed damping coefficients or damping curves set by the factory, and cannot be adjusted in real time according to the vehicle load and line conditions. When the line conditions, vehicle speed and load change, the damping coefficient required by the rail bogie system for the shock absorber will continue to change. The damping curve set by the traditional passive shock absorber can only take the compromise value of various working conditions. During o...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art, solve or at least alleviate the problem that the traditional passive hydraulic shock absorber cannot be adjusted in real time according to the vehicle load and line conditions, and provide a semi-active shock absorber with high frequency response adjustable damping device

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