航空发动机压气机叶片损伤分析与监控对策

针对发动机在服役过程中,压气机叶片因外物打伤而产生裂纹、掉块等缺陷的问题,运用基于断口分析和能谱分析的失效分析方法,查明了导致发动机压气机叶片损伤的机理和根本原因,提出了集内窥检测和涡流检测于一体的监控对策。通过检测试验分析了叶片损伤图像和检测信号的典型特征,找出了缺陷的涡流信号显示与实际缺陷大小的对应关系,为准确可靠地定量判断叶片损伤提供了基准。

Damage analysis and monitoring measures of compressor blades of an aero engine

During the service of the engine,the compressor blades are damaged by foreign objects,resulting in cracks,falling blocks and other defects,this paper uses the failure analysis method based on fracture analysis technology and energy spectrum analysis technology to find out the mechanism and root cause of compressor blade damage,and puts forward the integrated endoscopic detection and eddy current detection in one monitoring strategy.The typical characteristics of blade damage image and damage detection signal are analyzed through inspection test,and the corresponding relationship between eddy current signal display of defect and actual size is found out,which provides a reference for accurate and reliable quantitative judgment.