The vibration test and analysis is difficult to be conducted, and the valid ways are still lack, which causes many centrifugal pumps to exceed the standard vibration in a big potential risk. In order to solve the problem, the HG8908C, a vibration data collection system of Beijing Jinghang, was used to monitor the vibration signal on the centrifugal pump manufactured by Chongqing Pumps Company. The vibration signal characteristic of amplitude domain, time domain and frequency domain were analyzed in detail by fast fourier transforms(FFT). Besides, combined with the typical database of vibration faults, the faults, such as the friction fault between pump rotor and casing, and the poor supporting stiffness on pipe by balancing axis force(PBAF), were diagnosed. Based on the above mentioned diagnostic outcome and the static bending deflection of pump rator by FEM, the install center of pump rotor was adjusted, the thickness of PBAF was increased, the support as welded among PBAF and pump body and other solutions were carried out. The test results show that the solution ways have a positive effect on it, and the pump can work for hours in a good state. The test results show that the fault diagnosis methods and the solution ways can solve better the matters of vibration faults on the centrifugal pumps, which is of a certain value to the similar problems.
PAN Xiwei,YANG Shudong,SHI Youcheng, et al. Research progress and key technologies analysis of SCR urea pump[J].Journal of Jiangsu University(natural science editions), 2017, 38(3): 280-288.(in Chinese)