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立式离心泵典型故障复现试验研究

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为了给立式离心泵的故障诊断提供试验和理论依据，搭建立式离心泵仿真试验台，进行立式离心泵典型故障的仿真复现试验，分析了转子不平衡、转子不对中和支座连接松动等故障的振动特性及其频谱特征。结果表明:机脚处的振动位移信号对支座连接松动故障的振动特性敏感性更高，轴系的振动信号对转子故障的振动特性敏感性更高;转子不平衡故障和转子不对中故障表现出不同的频谱特征，转子不平衡故障的频谱特征表现为 1 倍振动主要频率(amplitude power frequency，APF)幅值增大，且随着故障程度的增加，幅值呈现了逐渐减小的趋势，转子不对中故障的频谱特征表现为产生新的振动特征频率 2APF，且随着故障程度的增大，信号幅值逐渐增大;支座连接松动故障表现为频谱图中的主频变为 3APF，并出现新的 2APF和 1/2 分数谐波频率。
Experimental study on typical faults recurrence in vertical centrifugal pump
In order to provide experimental and theoretical reference for diagnosing faults in vertical centrifugal pumps,a simulated test bench for vertical centrifugal pumps was constructed,after which simulated reproduction tests of typical faults in vertical centrifugal pumps were conducted,and the vi-bration characteristics together with spectrum features of faults such as rotor unbalance,rotor misalign-ment,as well as pedestal looseness were analyzed.The results indicate that the vibration displacement signal at the foot of the machine is more sensitive to the vibration characteristics of pedestal looseness,while the vibration signal of the shaft system is more sensitive to the vibration characteristics of rotor faults.Rotor unbalance faults and rotor misalignment faults exhibit different spectrum features.The spectrum feature of rotor unbalance faults shows an increase in the amplitude of the 1×amplitude power frequency(1 APF),and as the fault severity increases,the amplitude gradually decreases.The spec-trum feature of rotor misalignment faults shows the generation of a new characteristic frequency,which is the 2×amplitude power frequency(2APF),and as the fault severity increases,the signal amplitude gradually increases.Pedestal looseness faults are manifested by the main frequency in the spectrum shifting to 3×amplitude power frequency(3APF),along with the appearance of new 2APF and 1/2 fractional harmonic frequencies.

vertical centrifugal pumpfault recurrencerotor unbalancerotor misalignmentpedestal looseness

胡思源、董亮、朱建成、陈玉党、程茂胜

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江苏大学国家水泵及系统工程技术研究中心,江苏 镇江 212013

辽宁恒星泵业有限公司,辽宁 丹东 118017

安徽莱恩电泵有限公司,安徽 宁国 242300

立式离心泵 故障复现 转子不平衡 转子不对中 支座连接松动

国家自然科学基金国家自然科学基金国家自然科学基金镇江市重点研发计划镇江市重点研发计划西华大学流体及动力机械教育部重点实验室开放基金江苏高校优势学科建设工程项目江苏省"六大人才高峰"高层次人才项目

518791225177910851779106GY2017001GY2018025szjj2017-094GBZB-017

2024

10.3969/j.issn.1674-8530.23.0052

排灌机械工程学报
中国农业机械学会排灌机械分会,江苏大学流体机械工程技术研究中心

排灌机械工程学报

CSTPCD北大核心
影响因子：1.055
ISSN：1674-8530
年,卷(期)：2024.42(6)
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