离心泵流体激励力诱发振动的蜗壳与叶轮途径

蒋爱华;李国平;周 璞;章 艺;华宏星

振动与冲击 ›› 2014, Vol. 33 ›› Issue (10) : 1-7.

PDF(3397 KB)
PDF(3397 KB)
振动与冲击 ›› 2014, Vol. 33 ›› Issue (10) : 1-7.
论文

离心泵流体激励力诱发振动的蜗壳与叶轮途径

  • 蒋爱华1,2,李国平1,周 璞1,章 艺1,华宏星2

作者信息 +

Vibratioin incited by fluid florces on centrifugal pump from volute path and impeller path

  • JIANG Ai-hua1,2,LI Guo-ping1,ZHOU Pu1,ZHANG Yi1,HUA Hong-xing2

Author information +
文章历史 +

摘要

研究蜗壳、叶轮途径流体力诱发的离心泵振动,分析CFD蜗壳内表面流体力作用下电机-离心泵-机架FEM模型瞬态响应;用Newmark- 算法分析CFD叶轮表面流体合力、合力矩作用下叶轮-转轴-支撑-机架转子动力学模型响应;并对比蜗壳、叶轮两条途径流体力诱发离心泵基座振动。结果表明,泵内表面流体压力脉动为宽频激振源,会诱使离心泵系统产生各阶模态振动;流体力通过叶轮途径诱发离心泵基座振动位移幅值谱最大峰值出现在叶轮转频处,振动加速度幅值谱最大峰值出现在叶轮流道通过频率处,而非叶片通过频率处;流体力通过蜗壳途径诱发的离心泵基座振动远小于叶轮途径诱发的振动,叶轮-转轴-支撑-机架为流体激励诱发离心泵基座振动的主要途径。

Abstract

Research on vibration incited by fluid force on centrifugal pump by volute path and impeller path is valuable and instructive for reducing vibration. Transient analysis of motor-pump-workbench FEM is carried out based on fluid force on interior surface of centrifugal pump calculated by CFD. And response of impeller-shaft- support- workbench rotordynamic model is also obtained by Newmark- algorithm based on gross fluid force and torque on impeller from CFD.At last, the vibrations incited by the two paths are compared with each other. The results show that presssure pulsation on interior surface of volute is a widely frequancy-band source of vibration exitation, and vibration of each model is generated by centrigugal pump system with the pressure pulsation. Besides, maximal peak of amplitude spectrum of vibration displacement at centrifugal pump workbench incited by fluid force via impeller path locats at impeller-rotation frequency, while the spectrum maximal peak of vibration acceleration at the workbench does’t lie on blade passing frequency but flow channal passing frequency. The vibration of the workbench incited by fluid force of volute path is far less than that of impeller path, and impeller-shaft-support-workbench path is the main way that fluid force incites centrifugal pump workbench vibration.


关键词

离心泵 / 蜗壳 / 叶轮 / 流体激振 / 转子动力学

Key words

centrifugal pump / impeller / volute / fluid exciting vibration / rotordynamic

引用本文

导出引用
蒋爱华;李国平;周 璞;章 艺;华宏星. 离心泵流体激励力诱发振动的蜗壳与叶轮途径[J]. 振动与冲击, 2014, 33(10): 1-7
JIANG Ai-hua;LI Guo-ping;ZHOU Pu;ZHANG Yi;HUA Hong-xing. Vibratioin incited by fluid florces on centrifugal pump from volute path and impeller path[J]. Journal of Vibration and Shock, 2014, 33(10): 1-7

PDF(3397 KB)

1129

Accesses

0

Citation

Detail

段落导航
相关文章

/