航空发动机附件机匣轴承失效故障复现试验  

Fault Recurrence Test for Aeroengine Accessory Gearbox Bearing Failure

作　　者：于庆杰 张大鹏 刘新宇 刁庆 闫国斌 YU Qing-jie;ZHANG Da-peng;LIU Xin-yu;DIAO Qing;YAN Guo-bin(AECC Harbin Bearing Co.,Ltd.,Harbin 150025,China)

机构地区：[1]中国航发哈尔滨轴承有限公司,哈尔滨150025

出　　处：《航空发动机》2021年第S01期120-123,共4页Aeroengine

基　　金：航空动力基础研究项目资助。

摘　　要：针对航空发动机在飞行时附件机匣的深沟球轴承发生铆钉断裂、沟道剥落2种失效故障,为了定位故障原因,开展了2套轴承外圈沟道预损伤及4套轴承铆钉断裂的轴承失效故障复现试验。结果表明:轴承故障失效时序为外圈沟道由于表面损伤先产生表面疲劳剥落,然后引发铆钉断裂;结合轴承的原材料、设计、工艺、质量及其在机匣上安装使用情况等的复查结果与轴承拆卸试验结果,确定轴承拆卸工艺不当是产生外沟道表面损伤的主要原因。采用轴承内圈拆卸工艺后可有效避免拆卸过程中的轴承沟道损伤,从而预防此类故障的发生。Aiming at two kinds of failure faults of deep groove ball bearing of accessory gearbox in aeroengine during flight,such as riv⁃et fracture and groove flaking,in order to confirm the failure causes,the fault recurrence tests of two outer groove pre-damage bearings and four rivet fracture bearings are carried out.The results show that the failure sequence of the bearing is that the surface fatigue flaking first occurs due to the outer groove damage of the bearing,and then the rivet fracture occurs.Combined with the reexamination results of the raw materials,design,process,quality of the bearing and the installation and use of the bearing on the gearbox,and the test results of the bear⁃ing disassembly,it is determined that the improper disassembly process of the bearing is the main reason for the outer groove damage.The bearing groove damage can be avoided effectively after the bearing inner ring disassembly process,thus preventing the occurrence of such faults.

关 键 词：附件机匣 轴承失效 故障复现 沟道剥落 铆钉断裂 失效时序 拆卸工艺 航空发动机 

分 类 号：V2292[航空宇航科学与技术—飞行器设计]