农业机械学报2018，Vol.49Issue(5)：179-185,7.DOI:10.6041/j.issn.1000-1298.2018.05.020
离心泵水力诱导激振试验研究
Experiment on Fluid Force Induced Vibration for Centrifugal Pumps
摘要
Abstract
The trend toward large and high speed centrifugal pump brings a great challenge for the safe and stable operation of centrifugal pumps.And fluid force induced vibration of centrifugal pumps is increased significantly.In order to reveal the fluid force induced vibration characteristic of centrifugal pumps,a single-blade centrifugal pump was used as the test pump.Based on the pump performance experiment,two vertically arranged eddy current displacement sensors were used to measure the transient displacement of impeller wear ring when pumping air and water.Time history and frequency spectrum of the displacement of the wear ring and locus of the wear ring displacement were obtained.Fluid force induced vibration characteristics of the centrifugal pump at different flow rates were obtained by using Huake hydraulic machinery tester based on the key phase information of the Hall sensor.The experimental results showed that the time history and frequency spectrum of the displacement of centrifugal pump were similar in both pumping air and water.Waveforms were periodically repeated distortion sinusoids and the dominant frequency was the rotational frequency of impeller.Locus of the wear ring displacement was distorted oval,and there was a mutation when pumping water.Fluid force induced locus of the wear ring displacement under different flow conditions were also distorted oval.And there was a mutation between 210° and 300°,the maximum appeared at around 130°.Fluid force induced vibration was significantly increased at the small flow rates,corresponding to the pump efficiency was significantly reduced,and it became weak at the design flow rate and large flow rates,corresponding to the higher efficiency of the pump.The research result provided a reference for the stable operation of centrifugal pumps and on-line fault diagnosis.关键词
离心泵/水力激振/试验Key words
centrifugal pump/fluid force induced vibration/experiment分类
机械制造引用本文复制引用
谭林伟,施卫东,张德胜,周岭,王川..离心泵水力诱导激振试验研究[J].农业机械学报,2018,49(5):179-185,7.基金项目
国家自然科学基金项目(51609106)、江苏省第五期“333工程”科研项目(BRA2017353)、江苏省“六大人才高峰”高层次创新人才团队项目(JNHB-CXTD-005)、江苏省重点研发计划项目(BE2016163)和江苏省普通高校研究生科研创新计划项目(KYLX_1043) （51609106）
