摘要
针对某航空发动机杯形锁圈发生碎裂的故障情况,进行检查和经验分析,列出故障树,然后通过扫描电镜对杯形锁圈碎片进行了材料分析和断口性质分析。结果表明,断裂性质为疲劳断裂,首断位置位于锁窝处。为了解锁窝处是否存在原始缺陷,对冲锁后的残余应力进行了仿真,结果表明锁窝附近部分区域残余应力大。根据设计复查、故障树排查、断口和仿真分析结果,找到故障原因为冲锁方式不当,并给出了解决措施。
The failure of a cup lock ring of the aero-engine central transmission shaft is introduced.Fault tree is listed firstly according to the checking results and analyzing experience.By using scanning electron microscope,material and fracture property analysis are conducted.Results show that it is a fatigue failure and the primary rupture position is the locking socket.The locking process is simulated to know whether there is an initial flaw.Results show a large residual stress around the locking socket.Improper locking method is concluded to be the failure reason according to design checking up,fault tree exclusion,fracture appearance and simulation analysis.Finally,Solution is given to solve the problem.
作者
王振华
孔祥锋
李舒婷
刘国良
李莹
WANG Zhenhua;KONG Xiangfeng;LI Shuting;LIU Guoliang;LI Ying(AECC Shenyang Engine Research Institute,Shenyang 110015,China;AECC Key Laboratory of Power Transmission Technology on Aero-engine,Shenyang 110015,China;AECC Liming Aero-engine Co.,Ltd.,Shenyang 110015,China;AECC Xi’an Aero-engine Co.,Ltd.,Xi’an 710021,China)
出处
《机械工程师》
2024年第7期146-149,共4页
Mechanical Engineer
关键词
杯形锁圈
疲劳
碎裂
残余应力
故障树
lock ring
fatigue
fracture
residual stress
fault tree
