GUAN Wen-xiu1,2, JIANG Tao2, TAO Chun-hu2, ZHANG Bing2, LIU De-lin2, HU Chun-yan1
1. Key Laboratory of Nondestructive Test (Ministry of Education),Nanchang Hangkong University,Nanchang 330063,China; 2. Beijing Key Laboratory of Aeronautical Materials Testing and Evaluation,Beijing 100095,China
Abstract:Based on analyzing some classic early failure cases of shaft bearings, the common factors contributing to early failure of shaft bearing were discussed and summarized. Local burning caused by improper abrasive machining may lead to early failure of shaft bearings. Improper dimension matching, pits caused by pull-off carbide, foreign material, and improper assembly were other common causes. In addition, the effect of lubrication and loading on failure of shaft bearings was analyzed. In order to improve service life and reliability of shaft bearing, design,manufacture, machining process, and the use of process must be fine.The suitable process parameters and effective preventive measures are needed especially in grinding process and assembly.