空气涡轮起动机传扭轴断裂故障分析  

Fault Analysis of Broken Transmission Torsion Shaft of Air Turbine Starter

作　　者：蒋聪 陈靖华[1] 张雪强 JIANG Cong;CHEN Jinghua;ZHANG Xueqiang(Nanjing Mechanical and Hydraulic Engineering Research Center,Aviation Industry Corporation of China,Ltd.,Nanjing 211106,China)

机构地区：[1]中国航空工业集团有限公司金城南京机电液压工程研究中心,江苏南京211106

出　　处：《机械制造与自动化》2021年第4期46-48,共3页Machine Building & Automation

摘　　要：针对某型航空发动机在起动过程中空气涡轮起动机传扭轴断裂问题,结合宏观检测和断口金相分析,对发动机附件机匣和起动机中潜在的不安全因素开展排查工作,绘制详细故障树,得出了进气压力超调、起动系统传动链齿侧间隙和发动机转动惯量的随机性综合作用,引起瞬时冲击转矩超大,是导致此次传扭轴断裂故障的主要原因。Aimed at the broken transmission torsion shaft of the air turbine starter,the potential unsafe factors in engine accessory casing and starter were investigated by means of combining macroscopic inspection with metallographic analysis of fracture surface,and the detailed fault tree was compiled.It is concluded that the main causes of the fracture are the excessive instantaneous impact torque created by the combined action of intake pressure overshoot,gear side clearance of transmission chain of starting system and engine rotational inertia.

关 键 词：空气涡轮起动机 冲击转矩 齿侧间隙 故障分析 

分 类 号：P277.3[天文地球—测绘科学与技术]