Composite conical rubber spring and rigidity design method thereof

Abstract

A composite conical rubber spring comprises a conical rubber spring body and is characterized in that a hydraulic damping mechanism is arranged in the conical rubber spring body in a sealed mode, and the hydraulic damping mechanism generates dynamic damping along with vertical bearing of the conical rubber spring body so as to provide dynamic rigidity for the conical rubber spring body. The elastic supporting effect of a rubber body in the conical rubber spring body and the dynamic hardening effect of the hydraulic damping mechanism are fully exerted, the requirement for improving the vertical rigidity of a primary suspension system during high-speed running and heavy-load running is met, the running stability of a train is improved, and it is guaranteed that the dynamic change of the vertical rigidity of the composite conical rubber spring in the bearing process meets the variable rigidity requirement. The invention further provides a rigidity design method of the composite conical rubber spring.

Description

technical field [0001] The invention relates to a composite conical rubber spring and a stiffness design method thereof, which are used in a primary suspension system of a rail vehicle bogie. Background technique [0002] The main purpose of installing the axle box spring on the bogie is to ensure the smooth and safe operation of the vehicle. The axle box spring is mainly installed between the axle box and the frame to play a series of vibration reduction functions. When running at low speed, the primary suspension system is required to provide lower vertical stiffness, and the product can adapt to the change of vertical unevenness of the line at low frequency, large vertical stiffness will cause the train to derail; but when driving at high speed and heavy load , it is required that the primary suspension system can have high vertical stiffness, and block the vertical vibration from the track at high frequency, so as to realize the stability of the train. The existing trad...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that a separate pressure air source needs to be provided during the implementation process, which will increase the structural burden of the frame

And because the internal space of the conical spring is limited, the internal volume of the built-in airbag is limited, and it is difficult to achieve greater damping through the orifice

In addition, the built-in airbag has high sealing requirements, and it is difficult to achieve sealing and installation

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