某型发动机新件涡轮叶片叶冠掉块故障分析  

Failure Analysis of Turbine Blade Shroud Loss for an Aeroengine

作　　者：孟憬非 黄庆南[1] 赵光电 刘浩 

机构地区：[1]沈阳发动机设计研究所,沈阳110015 [2]新艺机械厂,平坝561114

出　　处：《航空发动机》2006年第2期17-22,共6页Aeroengine

摘　　要：为排除某型发动机新件涡轮叶片叶冠掉块故障,对故障件进行尺寸检测、加工制造工艺复查、断口分析、结构和强度分析等,认为:引发故障的主要原因是叶冠转接R不圆滑、存在尖角,造成应力集中;而相邻原机件叶片弦宽尺寸超差,锯齿形工作接触面积小,以及非工作面局部碰磨,是引发故障的次要因素。采取并验证了有针对性的排故措施。In order to troubleshoot turbine blade shroud loss for an aereengine, size measurement, manufacturing technology reexamination, fraeture analysis, structure and strength analysis are conducted for the failure blade. The main cause of the failure is found to be the unsmoothed shroud blend radius, which resulted in stress concentration. Other causes include the out - of - tolerance of blade chord width between adjacent blades, the undersize contact area of serrated working side and the local wearing of non - working side. Corresponding troubleshooting measures are verified and taken.

关 键 词：涡轮叶片 锯齿冠 掉块 应力集中 航空发动机 

分 类 号：V232.4[航空宇航科学与技术—航空宇航推进理论与工程] U472.43[机械工程—车辆工程]