Experimental Study on Cavitation Induced Low Frequency Vibration in a Centrifugal Pump
Experimental Study on Cavitation Induced Low Frequency Vibration in a Centrifugal Pump
复制标题
离心泵空化引起的低频振动实验研究
DOI：
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发表时间：
2012
影响因子：
2.4
通讯作者：
Kang, Can
中科院分区：
文献类型：
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作者：
Gao, Bo;Yang, Min-Guan;Li, Zhong;Kang, Can
汽蚀影响泵的安全稳定运行。设计了一台离心式模型泵，对泵汽蚀引起的低频振动进行了实验研究。利用高速摄像机进行汽蚀流动可视化试验。采用振动加速器采集泵的低频振动信号。分析了汽蚀发展过程中汽蚀气泡的评价过程。同时，比较了汽蚀发生前和汽蚀充分发展阶段的低频频谱特征。总振动级、总振动级和最大振动率讨论了不同空化阶段的离散频率加速度，提出了振动临界值可以作为空化程度的判据，叶片通过频率处的振动加速度幅值也可以用来指示泵内空化的发展。
Pump cavitation affects the safe and stable operation.A centrifugal model pump was designed for experimental study on the pump cavitation induced low frequency vibration.High-speed camera was utilized in the test for cavitation flow visualization.Vibration accelerators were adopted to capture the pump low frequency vibration signals.The evaluation process of cavitation bubbles was analyzed as cavitation developing.Meanwhile,comparison was carried out between low frequency spectra features before cavitation and that in fully developed period.Total vibration levels, accelerations at discrete frequency were discussed as well at different cavitation stages.It is proposed that vibration critical value can be used as a criterion of cavitation levels.Vibration acceleration amplitudes at blade pass frequency also may be used to indicate the cavitation development in pumps.