摘要
某发动机用游星齿轮轴承在工作过程中发生失效,保持架断裂,滚棒、滚道磨损。本文对失效保持架、滚棒、中间齿轮轴进行了断口形貌观察、金相组织及硬度检测、化学成分分析等工作。分析结果表明,保持架的断裂性质为疲劳断裂,滚道的损伤性质为接触疲劳。游星齿轮轴承的失效主要与轴承组件中应力不均匀、局部应力过大有关。
The planetary gear bearing of an engine failed in service with the fractured cage and the wearing rollers and raceway, Observations were performed on the fracture surfaces and examinations were given to metallography and hardness as well as chem- istry compositions. The results showed that the cage fractured with a fatigue mode and the raceway was damaged with a contact fatigue mode. Failure of this planetary gear bearing is mainly related to the asymmetry stress and the local higher stress.
出处
《失效分析与预防》
2007年第2期37-39,61,共4页
Failure Analysis and Prevention
关键词
游星齿轮
轴承
失效
疲劳断裂
接触疲劳
planetary gear
bearing
failure
fatigue fracture
contact fatigue
