关键词: 水泵, 轴承, 开裂, 疲劳, 失效分析

Abstract: In order to ascertain the reasons for the cracking failure of the bearing of a thermoregulation water pump in a plastic production unit of a petrochemical company, the inner ring of the failed bearing of the water pump was tested and analyzed by means of scanning electron microscope, Rockwell hardness tester and metallographic microscope. The test results showed that the cracking failure of the bearing inner ring was mechanical fatigue. The main reason for the bearing inner ring cracking was that there were too many non-metallic inclusions in the inner ring material. The same batch of imported bearing spare parts were checked and tested, and communication with the bearing supplier was done so as to avoid similar material defects.

Key words: water pump, bearing, cracking, fatigue, failure analysis