进油嘴设计不合理引发涡轮冷却器失效分析  

Design Inconsequent Analysis of Afflux Oil Orifice in Failed Turbo Cooler

作　　者：陈星[1,2] 刘松[3] 姜涛[1,2] 

机构地区：[1]北京航空材料研究院中航工业失效分析中心,北京100095 [2]中航试金石检测科技有限公司,北京100095 [3]中航工业南京机电液压工程研究中心,南京211106

出　　处：《失效分析与预防》2013年第2期117-122,共6页Failure Analysis and Prevention

基　　金：北京航空材料研究院基金(KF53120731)

摘　　要：飞行员在飞行过程中闻到有烧焦的气味随即紧急迫降,分解后发现涡轮冷却器风扇叶片和轴承严重损坏。通过外观观察、断口宏微观观察、金相和硬度检测等手段,确定了涡轮冷却器的破坏性质和原因。结果表明:涡轮冷却器内部润滑油的缺失导致了轴承内部的干磨破坏。引起缺油的原因主要与进油嘴设计不合理有关。建议适当减小进油嘴与帽子的重叠长度。Some adust was smelled by pilot after land immediately.The blade and axletree damaged severely after the turbo cooler broken down.The feature and cause of the cracks were analyzed by micro and macro observation on appearance and fracture surface,metallographic examination,and hardness testing.The results show that the turbo cooler axletree abrasion by lacking oil,which related to design inconsequent of afflux oil orifice.It is suggested that the overlap length of afflux oil orifice and cap should be reduced.

关 键 词：涡轮冷却器 轴承 润滑油 进油嘴 

分 类 号：V261[航空宇航科学与技术—航空宇航制造工程]