高速铁路车辆轴承试验机微机监控与诊断系统

A Monitoring and Diagnosing System for Use in the High-Speed Railway Bearing Test Rig

介绍了所研制的高速铁路车辆轴承试验机微机监控与诊断系统；重点讨论了工况监视与诊断的实现技术；并把该系统成功地应用于高速铁路车辆轴承的模拟试验中．

microcomputer-based monitoring and diagnostic system for use in the test rig of bear-ing for high-speed railway carriages is presented.Speed control and loading for the bearingcan be automatically carried out.The physical quantities including vibration,temperature,speed and load that describe the working conditions of the bearing can be automatically moni-tored.Emphasis is laid on the hardware structure and the software realization for the vibra-tion monitoring and diagnosis. Based on the feature of the envelop power spectra of the vi-bration signal,a non-dimensional characteristic variable which can be used to diagnose theminor defects on the working surfaces of the bearing elements is proposed.the system hasbeen successfully used in the simulation test on the bearings and the experimental resultsshow that the end face wear and the roller surface gall can be sensitively and effectively de-tected.