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| Analysis of vibration signal characteristics of centrifugal pump impeller under different wear degrees |
| YIN Jiangnan, YUAN Shouqi*, LUO Yin, SUN Hui, GONG Bo |
| National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212031, China |
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Abstract In order to study the characteristics of the vibration signal under different wear degrees of the inlet edge of centrifugal pump, based on the platform of virtual instrument, the IS-50-160-00 single-suction centrifugal pump was used as the research object, the vibration signal was conducted by means of time domain and frequency domain. The method of kurtosis analysis was taken in time domain analysis. The result shows the kurtosis of different wear impellers with the same variation degree. The kurtosis of vibration signal in the direction of base and axis was monitored to judge the wear degree of centrifugal pump. Based on the analysis of peak factors, there is a higher peak in the domain spectrum of wear impeller, especially in the direction of axis. The variation of vibration energy would appear at high frequency in the method of maximum entropy spectrum analysis. The variation of vibration energy at high frequency(2 500-5 000 Hz)can be used to determine the wear level of impeller. It can be found that there is the greatest variation of energy of PSD in the directions of base and axis. The cha-racteristics of the vibration signal of the centrifugal pump impeller under different wear degrees can provide reference for the monitoring and analysis of the centrifugal pump fault.
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Received: 13 April 2018
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