某航空电机脂润滑轴承失效分析与改进措施  

Failure Analysis and Improvement Measures of Grease-lubricated Bearing Used in Aeromotor

作　　者：陈彬 徐俊 张剑 郭帅 姜艳红 CHEN Bin;XU Jun;ZHANG Jian;GUO Shuai;JIANG Yanhong(Zhongzhe High-speed Railway Bearing Co.,Ltd.,Quzhou Zhejiang 324000,China)

机构地区：[1]中浙高铁轴承有限公司,浙江衢州324000

出　　处：《润滑与密封》2022年第12期192-196,共5页Lubrication Engineering

摘　　要：针对某航空电机用脂润滑密封轴承试验器试验失效问题,分别从轴承外观、材料、硬度、金相组织、润滑脂等5个方面进行检测和分析,发现密封圈磨损产生的磨屑掉入轴承内部使润滑脂变质是导致轴承失效的主要原因。提出将密封圈材料由聚四氟乙烯更换为硬度较低的氟橡胶,同时降低密封圈接触唇与内圈挡边过盈量等改进措施,取得了良好的效果。Aimed at the failure problem of grease-lubricated bearing used in aeromotor during the test,the reasons of the bearing damage were analyzed from five aspects,including the appearance,material,hardness,microstructure and grease.It is found that the main reason for the bearing failure is that the wear debris generated by the wear of the seal ring falls into the bearing and cause the deterioration of the grease.The improvement measures such as changing the sealing ring material from polytetrafluoroethylene to fluororubber with lower hardness and reducing the interference between the contact lip of the sealing ring and the inner ring flange are proposed,and good results are achieved.

关 键 词：滚动轴承 脂润滑 失效 磨屑 

分 类 号：TH133.331[机械工程—机械制造及自动化] TE626.4[石油与天然气工程—油气加工工程]