NEW METHOD STUDY ON FAULT DIAGNOSIS OF LOW-SPEED ROTATING MACHINERY USING STRESS WAVES

Against the difficulty of the fault diagnosis for low-speed rotating machinery,a new method of detecting the early stages of the loss of mechanical integrity in low-speed machinery was presented and the properties of the SW(stress wave) and its transmission law in low speed rotating machinery were studied.According to the characters of the fault stress waves,Db10(Daubechies 10) was selected to analyze the signals through the comparison of several mother wavelet.Multi-scaled decomposition and reconstruction were carried out in the analysis.The feature frequency of fault stress waves was extracted successfully finally.