Anti-snake oil pressure shock absorber with variable damping, rail train and its design method

Abstract

The invention discloses an anti-snaking oil pressure damper with variable damping. The anti-snaking oil pressure damper with the variable damping comprises an oil storage cylinder, a pressure cylinder, a piston, a piston rod, a guide seat, an outer screw cap, a chassis and a bottom valve. The inner cavity of the pressure cylinder is divided into a front cavity and a rear cavity separately by the piston, an oil storage cavity is formed between the oil storage cylinder and the pressure cylinder, and the front cavity and the rear cavity are both filled with oil liquid. An extending regulating valve group and a compressed regulating valve group are installed on the piston, the oil storage cavity is filled with the oil liquid and air, and the oil liquid and the air are located on the two sidesof the radial direction of the oil storage cavity separately. The oil storage cavity is internally provided with a front pressure relief channel and a rear pressure relief channel, wherein the front pressure relief channel is arranged in the axial direction and an oil liquid circuit is formed between the front pressure relief channel and the front cavity, and the rear pressure relief channel is arranged in the axial direction and an oil liquid circuit is formed between the rear pressure relief channel and the rear cavity. The piston is located between the front pressure relief channel and therear pressure relief channel, and the thickness of the piston in the axial direction is smaller than both the axial widths of the front pressure relief channel and the rear pressure relief channel. The anti-snaking oil pressure damper with the variable damping is simple in structure, reliable to use, and low in manufacturing cost, and the lag phenomenon of damping force adjustment can be effectively avoided. The invention further provides a rail train and a design method thereof.

Description

technical field [0001] The invention relates to a variable damping anti-snake oil pressure shock absorber, which is installed between the car body chassis and the bogie frame of rail trains, and is used for suppressing the snake-like movement of the bogie. The invention also relates to a rail train and a design method thereof. Background technique [0002] When the rolling stock runs at high speed, the bogie may produce periodic large-amplitude swinging motion in the lateral direction, that is, snaking motion. Violent snaking motion will cause the wheel rim to continuously hit the rail, accelerate the wear of the wheel and rail, increase the risk of wheel derailment, and thus threaten the safety of operation. This is a major obstacle for high-speed trains. An anti-snake oil pressure shock absorber is installed longitudinally between the underframe of the car body and the frame of the bogie, which can effectively restrain the snaking motion of the bogie. Anti-snake oil pres...

AI Technical Summary

Problems solved by technology

Although this solution realizes the function of the anti-snaking oil pressure shock absorber running on a small-radius curve, the damping force and dynamic stiffness of the shock absorber disappear, but it is difficult to process the bypass damping groove in the pressure cylinder, and the damping groove will damage the piston. The cylindrical surface affects the sealing life of the piston and causes the early failure of the shock absorber; in addition, the manufacturing cost is relatively high

[0007] In summary, the existing technology can realize the anti-snake oil shock absorber with the function of disappearing the damping force and dynamic stiffness of the shock absorber when the anti-snake oil shock absorber is running on a small radius curve. Complexity, relatively many failure points, early failure, high manufacturing cost and / or defects of damping adjustment lag

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