燃气轮机滑油供油总管断裂故障分析

Fracture Fault Analysis of Ga Turbine Oil Supply Main Pipe

针对某燃气轮机滑油供油总管在整机试验中发生的断裂故障,建立故障树,对管子断口、成分、硬度、抗拉强度、金相进行分析,并进行强度校核。通过分析,确认断裂故障原因为管堵结构设计缺陷和真空钎焊方法不完善。制订改进措施,并通过试验验证,确认措施有效,能够避免滑油供油总管断裂故障再次发生。

According to the fracture fault of a gas turbine oil supply main pipe in the whole machine test,a fault tree was established,the fracture,composition,hardness,tensile strength and metallographic of pipe were analyzed,and the strength check was carried out.Through analysis,it was confirmed that the cause of the fracture fault is the design defect of the pipe plugging structure and the imperfect vacuum brazing method.The improvement measures were formulated and verified through tests,it is confirmed that the measures are effective and can avoid the recurrence of fracture failure of oil supply main pipe.