某型发动机滑油供油导管裂纹分析  

Crack Analysis of Aero-engine Oil-providing Pipe

作　　者：吕凤军[1] 傅国如[1] 

机构地区：[1]北京航空工程技术研究中心,北京100076

出　　处：《装备环境工程》2013年第6期114-117,共4页Equipment Environmental Engineering

摘　　要：目的研究确定某发动机滑油供油导管裂纹性质及其产生原因。方法通过痕迹检查、断口观察、X射线能谱分析等试验方法,对滑油供油导管裂纹进行了综合分析。结果滑油供油导管的裂纹性质为疲劳裂纹,疲劳起始于波纹管第1波谷的外表面。结论波纹管存在装配张应力是导致滑油供油导管产生疲劳裂纹的原因;装配张应力是由于弯管焊接段与波纹管在焊接时不同轴造成的。Objective To investigate the failure mode and reason for oil-providing pipe crack. Methods Comprehensive analysis of aero-engine oil-providing pipe was carried out through trace observation, macro and micro characteristics in combination with X-ray energy analysis. Results The failure of the pipe was due to fatigue crack, and the fatigue crack started from the first trough surface of the ripple pipe. Conclusions The assembling stress was the main reason for this crack failure, and it was formed owing to the different axis between the bended pipe and the ripple pipe during the welding process.

关 键 词：导管 裂纹 疲劳 

分 类 号：V215.6[航空宇航科学与技术—航空宇航推进理论与工程]