导风轮破裂原因分析  

Failure Analysis of Inducer

作　　者：韦日光 李亚非 李巍 赵迎春 朱培模 WEI Ri-guang;LI Ya-fei;LI Wei;ZHAO Ying-chun;ZHU Pei-mo(AECC Guiyang Aero-Engine Institute,Guiyang 550081,China;AECC Guizhou Liyang Aero-Engine Company,Guiyang 550014,China)

机构地区：[1]中国航发贵阳发动机设计研究所,贵阳550081 [2]中国航发黎阳航空发动机有限公司,贵阳550014

出　　处：《失效分析与预防》2018年第5期297-302,共6页Failure Analysis and Prevention

摘　　要：发动机高压涡轮转子在破裂转速试验时导风轮发生破裂,分析导风轮断口宏观和微观特征,对导风轮的材质进行检查,并对振动数据进行分析,确定导风轮为大应力破坏。结合导风轮残余变形量和有限元计算进行分析发现:导风轮在偏心离心力形成的力矩作用下发生偏转,扭转锁片,导致锁片塑性应变超过材料极限而发生断裂,使导风轮脱离轮盘约束而破裂。The inducer ruptured during the burst test of a high pressure turbine rotor of engine.In order to find out the failure cause,macro and micro observation,metallographic examination,chemical composition analysis,and vibration data analysis were carried out.The results show that the fracture mode of the inducer is overload fracture.Based on residual deformation amount analysis and finite element analysis,it is assumed that the moment caused by eccentric centrifugal force made the inducer deflect and the lock sheets distort.The plastic strain of the lock sheets exceeded the limit,leading to their fracture.Then the inducer got rid of the constraint of the turbine disk constraint and broke.

关 键 词：导风轮 轮盘破裂试验 连接件 有限元 

分 类 号：V232.3[航空宇航科学与技术—航空宇航推进理论与工程]