某型直升机传动系统轴承失效原因分析  

Failure Analysis on Bearings for Transmission System of a Certain Type of Helicopter

作　　者：曹迪 曲琼 武全有 CAO Di;QU Qiong;WU Quanyou(Airforce Military Representative Office in Luoyang District,Luoyang 471039,China;Luoyang LYC Bearing Co.,Ltd.,Luoyang 471039,China;State Key Laboratory of Aviation Precision Bearings,Luoyang 471039,China;Xi′an Jiaotong University,Xi′an 710049,China)

机构地区：[1]空军驻洛阳地区军事代表室,河南洛阳471039 [2]洛阳LYC轴承有限公司,河南洛阳471039 [3]航空精密轴承国家重点实验室,河南洛阳471039 [4]西安交通大学,西安710049

出　　处：《轴承》2019年第9期36-40,共5页Bearing

摘　　要：针对某型直升机传动系统轴承在耐久性试验后的失效情况,建立了用于系统分析的故障树,采用宏观和微观分析的方法,对轴承产生剥落的原因进行了分析,结果表明:轴承端面螺纹孔底部易产生应力集中,最后导致轴承在试验过程中发生疲劳失效。经试验验证,取消内圈端面的螺纹孔后降低了疲劳失效风险,满足使用要求,确保了直升机服役的安全。Aimed at failure of bearings for transmission system of a type of helicopter after durability test,the fault tree is established for system analysis.The reasons for flaking of the bearings are analyzed by using macroscopic and microscopic analysis methods.The results show that the stress concentration at bottom of threaded holes on end face of the bearings causes fatigue failure of the bearings during test process.After the threaded holes on end face of inner rings are eliminated,the risk of fatigue failure is decreased,and the usage requirements are met through test verification,ensuring the service safety of helicopter.

关 键 词：双列球轴承 直升机传动系统 试验 失效分析 

分 类 号：TH133.33[机械工程—机械制造及自动化]