Anti-snaking shock absorber capable of realizing frequency-variable stiffness characteristic, joint and application

Abstract

The invention provides an anti-snaking shock absorber capable of achieving the frequency-variable stiffness characteristic, hydraulic rubber joints and application. The shock absorber comprises an oil anti-snaking shock absorber, the two ends of the oil anti-snaking shock absorber are rod ends, and the left hydraulic rubber joint and the right hydraulic rubber joint are installed in the rod ends of the two ends of the oil anti-snaking shock absorber correspondingly. Connecting rods are mounted at the core parts of the hydraulic rubber joints, and the connecting rods are fixed with a bogie or a vehicle body end. Each hydraulic rubber joint is cylindrical and comprises an outer metal sleeve and an inner metal sleeve, a hydraulic cavity is formed between the outer metal sleeve and the inner metal sleeve, a main spring is embedded into the hydraulic cavity, a gap between the top of the main spring and an outer flow channel is an upper flow channel, a gap between the bottom of the main spring and the outer flow channel is a lower flow channel, and hydraulic cavities are formed in the left side and the right side of the main spring. The transverse dynamic performance of a motor train unit in the extreme wheel-rail contact state can be improved, the maintenance requirement for the wheel-rail profile shape is lowered, and the purpose of lowering the operation and maintenance cost of a high-speed train is achieved.

Description

technical field [0001] The invention belongs to the technical field of high-speed trains, in particular to an anti-snake shock absorber capable of realizing frequency-variable stiffness characteristics, a hydraulic rubber joint and the application of the joint. Background technique [0002] During the long-term service of high-speed trains, the lateral snaking stability is insufficient due to wheel-rail wear and contact state changes, causing low-frequency car shaking, vibration acceleration alarms, and high-frequency car shaking. At present, the main mitigation measures are to shorten the wheel repair cycle and frequent grinding Rails, even running at reduced speed, affect the normal and safe operation of trains and increase operation and maintenance costs. The essence of this phenomenon is that the vehicle's lateral stability is insufficient under the fixed-parameter suspension components taking into account high and low equivalent taper under different wheel-rail contact ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to propose a frequency-variable stiffness anti-snaking shock absorber for the problem of insufficient lateral stability of the vehicle in the extreme wheel-rail contact state of high and low equivalent taper due to the passive suspension of the fixed parameters of the EMU, which causes abnormal lateral vibration. It is beneficial to realize the lateral stability of the EMU in a wide range of equivalent taper, improve the lateral dynamic performance of the EMU in the extreme wheel-rail contact state, reduce the maintenance requirements for the wheel-rail profile, and reduce the operation and maintenance cost of high-speed trains The goal

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