基于全谱分析的转子裂纹-碰摩复合故障特征实验研究

Experimental Study on Compound Fault Characteristics of Rotor Crack and Rub-Impact Based on Full Spectrum Analysis

在转子实验台上模拟了不同转速下的碰摩故障、裂纹故障及相应的裂纹-碰摩复合故障,并采用全谱分析方法对其故障特征进行了分析。结果表明:相对于传统傅里叶频谱分析,全谱分析方法能准确识别3类故障,利用全谱图中-2 X、-3 X和-4 X倍频分量表征了碰摩-裂纹复合故障的耦合特性,为转子复合故障诊断提供了参考。

The rub-impact fault,crack fault and crack rub-impact compound fault were respectively simulated on a rotor test setup,and subsequently the full spectrum method was used to analyze the fault characteristics.Results show that compared with traditional Fourier spectrum analysis,the full spectrum method can accurately identify above three kinds of faults and can characterize the coupling characteristics of the compound fault using the-2 X,-3 Xand-4 X double frequency components.The experimental results may serve as a reference for the diagnosis of rotor compound faults.