排灌机械工程学报2012，Vol.30Issue(3)：260-264,5.DOI:10.3969/j.issn.1674-8530.2012.03.003
离心泵间隙对压力脉动及径向力的影响
Influence of gap on pressure pulsation and radial force of centrifugal pumps
摘要
Abstract
The unsteady flow in centrifugal pumps induces a pulsation in fluid pressure inside the volute channel and imposes a radial force on the volute wall too. Thus effect of the gap between the volute tongue and impeller outlet on them was tackled by means of a non-overload submersible sewage pump with extremely thickened-blades. Three pump models with different base circle diameters, such as 390, 435 and 460 mm were designed. The unsteady flow fields in those models were obtained numerically based on the standard k-e turbulence model and SIMPLE algorithm. The characteristics of pressure pulsation on the tongue and the radial force on the wall against gap were obtained. The results showed that the pressure pulsation and the radial force presented an obvious periodicity due to the ro-tor-stator interaction. The dominant frequency of pressure pulsation at the monitor points in the volute was the blade passing frequency. At the same flow rate, the intensity and amplitude of pressure pulsation at the dominant frequency were increased with decreasing gap. The time-averaged radial force imposed on the wall was decreased and then increased with increasing flow rate. Compared with the original pump model, the averaged radial force in the new models was increased regardless of gap at the same flow rate.关键词
离心泵/间隙/超厚叶片/动静干涉/径向力/压力脉动Key words
centrifugal pump/gap/extremely thickened-blade/rotor-stator interaction/radial force/pressure pulsation分类
农业科技引用本文复制引用
施卫东,张磊,陈斌,蒋婷,张华..离心泵间隙对压力脉动及径向力的影响[J].排灌机械工程学报,2012,30(3):260-264,5.基金项目
江苏省产学研前瞻性联合研究项目(BY2010131) （BY2010131）
江苏高等学校优秀科技创新团队计划资助项目 （）
江苏高校优势学科建设工程项目 （）
