离心泵流体激励力的研究：蜗壳部分

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振动与冲击 ›› 2012, Vol. 31 ›› Issue (4) : 60-66.

论文

离心泵流体激励力的研究：蜗壳部分

蒋爱华1，章艺2，靳思宇2，章振华1，黄修长1，华宏星1

作者信息 +

fluid exciting forces on centrifugual pump part I: force on volute

JIANG Ai-Hua1, ZHANG Yi2, JING Si-Yu2,
ZHANG Zhen-Hua1, HUANG Xiu-Chang1 HUA Hong-Xin1※

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摘要

研究了叶轮转动过程中离心泵蜗壳所受流体激励力。基于CFD计算了离心泵叶轮转动过程中的瞬态内流场，而后积分得出蜗壳内表面三个方向上流体激励合力并进行频谱分析，最后运用九次多项式拟合、傅立叶级数与分段多项式拟合分别建立叶轮单周转动各向流体合力数学模型。结果表明：蜗壳所受出口方向、进口方向与垂直于进出口方向的流体激励力以叶片通过频率为基频波动，且波动幅值依次减小，波谷均出现于叶片通过蜗舌时；采用三段多项式拟合所建的数学模型与原始波形有最小的偏差，并且具有较低阶次

Abstract

Research on fluid exiting vibration of centrifugal pump volute is carried out. Firstly, based on the results of transient fluid flow by CFD simulation, three-direction orthogonal fluid exiting composite forces on volute are gained by integration the forces on interior fluid-solid surface of volute. Then compare among the three-direction composite forces both in whole transient simulation process and sole period is finished. As well as power spectrum analysis on these forces in the period that impeller rotates 360 degrees is done. At last, nine-order polynomial curve fitting, Fourier series and multi polynomial curve fitting are used to built mathematic model of three-direction single period fluid exiting forces respectively. The result shows that, the volute suffers three-direction periodical fluid forces whose frequency is the same as that of vanes in impeller passing volute tongue, and the direction of the first force which is perpendicular to the volute exit plane is opposite to the flowing direction and owns the biggest amplitude fluctuation in the three direction forces, while another direction of the second force which is perpendicular to the volute inlet plane is the same as that of the fluid flowing, the direction of the third force, whose amplitude fluctuation is the smallest, changes periodically. It also can be known that, peak of the second force and trough vale of the third force in single period both appear at the location that tip of vane passes the volute tough tangent line which crosses the center of impeller in the symmetry plane of volute, and the mathematic model by multi polynomial curve fitting has the smallest deviation from the original signal and less polynomial orders.

导出引用

蒋爱华;章艺;靳思宇;章振华;黄修长;华宏星. 离心泵流体激励力的研究：蜗壳部分[J]. 振动与冲击, 2012, 31(4): 60-66

JIANG Ai-Hua;ZHANG Yi;JING Si-Yu;ZHANG Zhen-Hua;HUANG Xiu-Chang HUA Hong-Xin※. fluid exciting forces on centrifugual pump part I: force on volute[J]. Journal of Vibration and Shock, 2012, 31(4): 60-66