Experiment on the flow induced vibration of an axial-flow pump based on Hilbert-Huang transform
LIN Peng1,LIU Heyun1,HU Dong1,LIU Meiqing2,WANG Shu1,ZHAO Wensheng2
1.School of Energy and Electromechanical Engineering, Hunan University of Humanities,Science and Technology,Loudi 417000,China;
2.School of Power and Mechanical Engineering ,Wuhan University,Wuhan 430072,China
Abstract：The influence of blade angle on the vibration of an axial-flow pump under normal operation and in starting state was studied by comparing the vibration signal characteristics of the pump station running under normal operation and in starting state at different blade angles.This could serve as a reference to ensure the safe and stable operation of the unit.The results show that under normal operating conditions, the general vibration amplitudes of the outer cylinder and the lower frame increase gradually as the blade angle increases from -8° to +8°.The amplitude of spindle slips is almost constant.The main frequency components of vibration signals in the flow direction include 2.5 Hz and 10Hz.And the main frequency components of vibration signals in the vertical flow direction and axial direction are 2.5 Hz, 10 Hz and 20 Hz, presenting a multiple relationship with the rotational frequency of the pump (2.5 Hz).When the blade angle increases from 2° to 8°, part of the peak values of vibration gradually exceeds 50 μm, entering into the C area, which indicates that the pump should not run continuously at large angle.
林鹏1，刘和云1，胡东1，刘梅清2，王舒1，赵文胜2 . 基于Hilbert-Huang变换的轴流泵流动诱导振动试验[J]. 振动与冲击, 2020, 39(6): 154-160.
LIN Peng1,LIU Heyun1,HU Dong1,LIU Meiqing2,WANG Shu1,ZHAO Wensheng2 . Experiment on the flow induced vibration of an axial-flow pump based on Hilbert-Huang transform. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(6): 154-160.
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