涡轮冷却器风扇叶片断裂分析  

Fracture Analysis of Fan Blades of Turbo Cooler

作　　者：黄飞波 侯卫国[2,3] 李明峻[2,3] 

机构地区：[1]南空军驻上海地区军事代表局,上海200231 [2]华南理工大学聚合物成型加工工程教育部重点实验室,广州510640 [3]工业和信息化部电子第五研究所芜湖实验室,安徽芜湖241002

出　　处：《失效分析与预防》2017年第4期243-248,共6页Failure Analysis and Prevention

摘　　要：针对飞机环控系统主要制冷部件涡轮冷却器风扇叶片断裂的问题,通过对涡轮冷却器故障件的整体外观检查、分解检查、风扇叶片断口分析、风扇叶轮背面摩擦痕迹分析、风扇端轴承、涡轮端轴承损坏程度、轴的硬度检测及轴强度校核,确定风扇端轴承为首先失效件。在此基础上,以风扇端轴承失效为顶事件,综合运用仿真分析、负载波动试验、硬度检测、轴承超温试验及无润滑失效试验等方法,对风扇端轴承失效原因进行分析,结果表明:轴承弯曲变形导致风扇叶轮刮蹭断裂;轴承变形失效的原因为缺油导致润滑不良,发生干磨,温度异常升高;缺油的主要原因是使用维护方法不当。并根据失效分析结果提出改进措施。In order to find out the failure cause of the fan blades of a turbine cooler,macro and micro observation,friction trace analysis,hardness test,and strength check were carried out. It is found that that the first failure part is the fan-side bearing. On this basis,simulation analysis,load fluctuation test,hardness test,over-temperature test on bearing and no lubrication failure test were carried out to analyze the failure cause of the bearing. The results show that the bending deformation of the bearing caused the fan blades to scrape and then fracture. The deformation failure of the bearing was the higher temperature due to dry grinding for lack of lubricating oil,which was related to the defective maintenance method. Based on the results above,some measures were put forward.

关 键 词：涡轮冷却器 风扇叶片 断裂 失效分析 润滑油 

分 类 号：TK474[动力工程及工程热物理—动力机械及工程]