基于故障树分析法的压气机振动故障分析

为了研究某型压气机在部件试验过程中发生的振动异常故障,基于Isograph的故障树分析法,对33项底事件主要从流体激振、机械激振和测试系统复查等3方面进行定性分析。结合试验中的气动数据和监测数据,利用排除法(设计排查和实物排查)逐级确定各底事件的不可用度大小,选取其中不可用度最高的底事件再进行详细分析,确定了故障原因:有3片压气机第1级转子叶片的叶尖与对应的机匣发生偏摩,其转子不平衡量发生了较大变化。通过采取对磨损的叶尖部位进行抛修,重新对压气机转子进行动平衡的方法排除了该故障,使试验顺利开展。

Application of Fault Tree Analysis Method on a Compressor Vibration Fault

In order to study abnormal vibration fault of a compressor in the process of component test, using fault tree analysis based on Isograph, the 33 bottom events carried out by qualitative analysis, mainly from the analysis of flow induced vibration, mechanical vibration and the test system re-examine. Then through the design investigation and physical investigation, combined with test aerodynamic data and monitoring data, the size of the unavailability of the bottom events was determined step by step using the exclusive method, the highest end event of the unavailability was analyzed in detail, and the cause of the vibration fault was found successfully. The 3 blades tip of the first stage rotor blades of compressor with case occured eccentric wear and the rotor imbalance appeared great changes. And the damaged blades tip was repaired, the fault was eliminated by the dynamic balance method of the compressor rotor, and the test was carried out smoothly.