Device for evaluating reliability of wheel structure and reliability evaluation method

Abstract

The invention discloses a device for evaluating the reliability of a wheel structure. The device comprises a vibration platform, a support mechanism for mounting a wheel, sensors and a control unit; the wheel is mounted on the support mechanism; the support mechanism is mounted on the vibration platform; the sensors are mounted on the wheel and joints between the wheel and the support mechanism; the vibration platform is electrically connected to the sensors and the control unit; the support mechanism includes a bottom plate, a support base and a shaft clamp, wherein the support base is arranged on the bottom plate, the bottom plate is arranged on the vibration platform, and the shaft clamp is connected to the support base; one end away from the bottom plate, of the support base has a groove I for mounting an axle of the wheel; a groove II for clamping the axle is correspondingly formed in the shaft clamp; and the groove II and the groove I match each other to fix and clamp the axle. The invention discloses a method for evaluating the reliability of a wheel structure, which can simulates a long life test, an impact test and a functional random vibration test in the longitudinal, lateral and vertical directions.

Description

technical field [0001] The invention belongs to the technical field of rail transit vehicles, and in particular relates to a device and a reliability evaluation method for evaluating the reliability of a wheel structure. Background technique [0002] With the rapid development of rail transit, the vibration and noise pollution generated by trains during operation has become a prominent problem affecting the urban environment. Rail traffic noise is mainly composed of wheel-rail noise, traction noise and aerodynamic noise, among which wheel-rail noise accounts for the main part. In order to reduce wheel-rail noise, the wheels must have vibration and noise reduction measures. become a rigid requirement. [0003] At present, the main types of low-noise wheels include combined elastic wheels and damping wheels with damping components (such as damping rings, shielding or damping plates, and dynamic shock absorbers). Compared with conventional integral wheels, since low-noise whe...

AI Technical Summary

Problems solved by technology

Compared with conventional integral wheels, since low-noise wheels are laid or combined with metal wheel bodies and damping members (or rubber parts), whether in the wheel design stage or in the actual service process, the reliability of its structure should be considered first. Otherwise, during the operation of the vehicle, due to the vibration caused by the track irregularity, the repeated or instantaneous impact caused by the track joints, foreign objects, etc., these may cause the laying (such as bonding, embedding) on ​​the low-noise wheel Loosening, falling or breaking of damping components and fixing bolts will directly affect the vibration and noise reduction effect of the wheels and the safety of the vehicle

[0004] In order to verify the reliability of vibration and impact, the current evaluation methods only evaluate the damping component products themselves, such as damping rings, dynamic shock absorbers, etc., to verify whether there is looseness, falling off or breaking, etc., but when the damping component is laid behind the wheel body , the vibration form and characteristics of the damping component have changed, and secondly, the natural frequency of the damping component is completely different from that of the low-noise finished wheel, and there may be vibration effects between the damping component and the wheel body, so it is necessary to design a low-noise Apparatus and method for evaluating the reliability of finished products with noise wheels, evaluating the reliability of finished products with low noise wheels through vibration and impact

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