Measured load spectra of the bearing in high-speed train gearbox under different gear meshing conditions

Yaxin Hou1, Xi Wang1, Shouguang Sun1, Hongbo Que2, Rubing Guo2, Xinhai Lin2, Siqin Jin2, Chengpan Wu2, Yongqin Zhou1, Xiaolong Liu1
1School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China
2CRRC Qishuyan Institute Co., LTD, Changzhou 213011, China

Tóm tắt

AbstractThe load spectrum is a crucial factor for assessing the fatigue reliability of in-service rolling element bearings in transmission systems. For a bearing in a high-speed train gearbox, a measurement technique based on strain detection of bearing outer ring was used to instrument the bearing and determine the time histories of the distributed load in the bearing under different gear meshing conditions. Accordingly, the load spectrum of the total radial load carried by the bearing was compiled. The mean value and class interval of the obtained load spectrum were found to vary non-monotonously with the speed and torque of gear meshing, which was considered to be caused by the vibration of the shaft and the bearing cage. As the realistic service load input of bearing life assessment, the measured load spectrum under different gear meshing conditions can be used to predict gearbox bearing life realistically based on the damage-equivalent principle and actual operating conditions.

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