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对某型航空发动机引接管的断裂故障进行了分析。对故障件进行了外观检查、断口分析、解剖分析及金相分析,分析了其断裂性质和原因。结果表明:引接管断裂性质为高周疲劳,起源于2根引接管之间钎焊焊接根部的外表面,该部位的应力集中以及发动机的振动载荷是引起引接管疲劳断裂的主要原因。
The failure of the lead pipe of a certain type of aeroengine was analyzed. The appearance of the fault piece inspection, fracture analysis, anatomical analysis and metallographic analysis, analysis of the nature of the fracture and its causes. The results show that the fracture nature of the lead pipe is high cycle fatigue, which originated from the outer surface of the brazed welded root between the two lead pipes. The stress concentration and the vibration load of the engine are the main causes of fatigue fracture of the lead pipe.