关键词: 涡轮泵;故障诊断;变换域处理;特征频率

Abstract: To effectively detect and diagnose its faults,it is necessary to take full advantage of the turbopump information of vibration signal in transform domain.The reasons of the typical fault of turbopump rotor blade abruption and abscission were analyzed.The vibration features of the fault were studied by the method of dynamic analysis to select the feature frequency revealing the fault effectively.However,turbopump speed fluctuation will result in the difficulty of the feature frequency extraction.So,a new way to solve the difficulty was shown.By a series of transform processing,the speed fluctuation effects on the vibration frequency was driven out to extract the stable feature frequency in transform domain.Thus,the problem of the typical fault diagnosis was solved under conditions of speed fluctuation.With the fault data in turbopump historical test,it is shown that the fault of turbopump rotor blade abruption and abscission can be detected and diagnosed effectively by tracking the amplitude variation of the feature frequency in transform domain.

Key words: Turbopump;Fault diagnosis;Transform processing;Feature frequency