Loading Device for Low-Frequency Fluctuating Loads of Axle Box Bearings for High-Speed Trains
During operation of high-speed trains,the axle box bearings will be subjected to wide-band fluctuating impact loads due to complex wheel-rail relationship and other factors,resulting in significant changes in contact loads between rollers and raceways,accelerating the wear and fatigue failure of the bearings.In order to simulate the low-frequency fluctuating loads of the bearings in laboratory environment,a loading device for low-frequency fluctuating loads is designed and built based on cam-spring mechanism,and the corresponding test bench for the bearings is developed.The test results of low-frequency fluctuating loads applied by loading device and dynamic load distribution inside the bearings under fluctuating loading conditions show that the designed device can apply the fluctuating loads of given amplitude and frequency to the bearings,and the fluctuation of contact loads between rollers and raceways in loaded zone of the bearings is consistent with fluctuation of total external loads of the bearings,verifying the effectiveness and feasibility of the device.
rolling bearingaxle box bearinghigh speed trainvariable loadloadingtest bench
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