| 基于小波包分解的离心泵关死点流动状态 |
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| 引用本文： | 袁寿其,黄萍,骆寅,梁赟,付燕霞.基于小波包分解的离心泵关死点流动状态[J].排灌机械,2011,29(4):282-286. |
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| 作者姓名： | 袁寿其 黄萍 骆寅 梁赟 付燕霞 |
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| 作者单位： | 江苏大学流体机械工程技术研究中心,江苏镇江,212013 |
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| 基金项目： | 国家杰出青年科学基金资助项目(50825902); 江苏省自然科学基金攀登项目(BK2009006) |
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| 摘 要： | 为研究离心泵关死工况点时内部复杂流动产生的压力脉动对离心泵多工况设计的影响,基于虚拟仪器技术,应用LabView进行数据采集,利用小波包对离心泵压力信号进行分解,建立了不同频率范围的特征信号,并进行试验验证.分析结果表明：离心泵关死点时压力脉动呈现不规则变化,没有明显的周期性,低于1倍叶片通过频率的低频脉动占据主导地位,轴频处的幅值随着流量的减小先增大后减小;离心泵流量减小至关死点工况时,叶轮内部出现回流,低频段的小波包重构系数变化明显,可见回流对低频段产生了较大影响;离心泵关死点工况轴频处的振幅和强度明显增强;离心泵关死点进口回流为辫状回流.试验结果表明：与傅里叶方法比较,基于小波包分解可识别不同频率对应的不稳定流动,提高离心泵关死点内部流动诊断的分辨性.
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| 关 键 词： | 离心泵 关死点 小波包分解 虚拟仪器 进口回流 |
Flow analysis based on wavelet packet decomposition for centrifugal pumps at shut-off condition |
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| Yuan Shouqi,Huang Ping,Luo Yin,Liang Yun,Fu Yanxia.Flow analysis based on wavelet packet decomposition for centrifugal pumps at shut-off condition[J].Drainage and Irrigation Machinery,2011,29(4):282-286. |
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| Authors: | Yuan Shouqi Huang Ping Luo Yin Liang Yun Fu Yanxia |
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| Institution: | Yuan Shouqi,Huang Ping,Luo Yin,Liang Yun,Fu Yanxia (Research Center of Fluid Machinery Engineering and Technology,Jiangsu University,Zhenjiang,Jiangsu 212013,China) |
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| Abstract: | In order to research the effect of pressure fluctuation caused by complicated flow inside centrifugal pumps at shut-off condition,based on the virtual technology and LabView,the pressure signal of centrifugal pumps was decomposed and the wavelet packet analysis was applied to extract the feature spectrum and establish different frequency bands.The experiment was carried out to test the analysis results.The analysis results show that the pressure pulsation at shut-off condition is irregular and non-cyclical,... |
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| Keywords: | centrifugal pump shut-off condition wavelet packet decomposition virtual instrument inlet backflow |
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