Experiment on vibration characteristics of double-suction centrifugal pump under multiple working conditions
1. National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2. School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, China
Abstract：To investigate the vibration characteristics of a double-suction centrifugal pump under different working conditions, the shell vibration test and the shaft vibration test of the centrifugal pump unit under different working conditions were carried out by LMS Test.Lab test system. The shell vibration, the shaft vibration and the axis trajectory of the pump were tested at 5 flow points and 5 rotating speeds. The frequency spectrum of the shell vibration and shaft vibration changed with flow rate and rotating speed was obtained by data processing. The experimental results show that the vibration intensity of shell vibration is fluctuated with the increasing of flow rate and is increased with the increasing of rotational speed. The size and variation trend of shell vibration are different at different measuring points and in different directions. The peak displacement of axial vibration is nonlinearly increased with the increasings of flow rate and rotation speed. The shell vibration spectra of different measuring points and directions are different, which indicates that there are much fluid-induced vibration. The trends of axial vibration with flow rate and rotation speed are similar in the two mutually perpendicular directions. The changes of flow rate and rotation speed have obvious influence on the axis trajectory.
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2021, Vol. 42 
