基于Hilbert-Huang变换的轴流泵流动诱导振动试验

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振动与冲击 ›› 2020, Vol. 39 ›› Issue (6) : 154-160.

论文

林鹏1，刘和云1，胡东1，刘梅清2，王舒1，赵文胜2

作者信息 +

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

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文章历史 +

摘要

对不同叶片角度下轴流泵站机组正常运行和开机状态进行振动试验，对比分析振动信号特征，探寻叶片角度在正常运行和开机状态下对机组振动的影响规律，为保证机组安全稳定运行提供参考。得到以下结论：正常运行工况下，随叶片角度从-8°增大到+8°，外筒体和下机架的振动幅值整体表现出逐渐升高的趋势，主轴摆度的幅值基本不变，满足无限制长期运行要求；沿来流方向监测的振动信号主要频率成分包括2.5 Hz和10 Hz；垂直来流方向及轴向的振动信号主要频率成分包括2.5 Hz，10 Hz和20 Hz，与水泵的转频2.5 Hz成倍数关系；随着叶片角度从2°增大到8°，部分测点振动峰峰值逐渐超出50 μm，进入C区域，说明水泵不宜在大角度下长期持续运行。

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.

导出引用

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[J]. Journal of Vibration and Shock, 2020, 39(6): 154-160

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