排灌机械工程学报2016，Vol.34Issue(3)：204-209,6.DOI:10.3969/j.issn.1674-8530.15.0079
导叶周向安装位置对离心泵叶轮径向力的影响
Effect of circumferential setting position of diffuser in concentric volute on impeller radial thrust in centrifugal pump
摘要
Abstract
In order to study effect of circumferential setting position of diffuser in concentric volute on impeller radial thrust,a specific centrifugal pump with diffuser and concentric volute as well as impel-ler was used as the model,four design cases where the angle αbetween the trailing edge of the blade pressure side of the diffuser and the volute discharge nozzle wall were considered to be 0°,10°,20°and 30°,respectively.Based on ANSYS CFX,unsteady numerical simulations of the whole flow field in those cases were conducted,the predicted head and efficiency are validated with the measurement. Further,the effects of αon performance and impeller radial thrust are clarified.It is identified that the maximal variations in head and efficiency are 1.95% and 1.39%,respectively,and the best pump performance is achieved at α=20°.With the increase of α,the amplitude of radial thrust pulsation firstly decreases but increases eventually.At α=20°,the amplitude reaches the minimum value, which is 80% of the largest amplitude.However,the dominant frequencies of radial thrust pulsation initially increase and then decrease with increasing α.At α=20°,the amplitudes of the first and se-cond dominant frequencies reach the minimum values.The change of αcan influence the distribution of radial thrust vector,and the distribution shows an obviously regular pattern at α=0°and 30°.Particu-larly,the distribution at α=0°may be more suitable for a long-term operation of this kind of pumps.关键词
离心泵/导叶/环形蜗室/相对位置/径向力Key words
centrifugal pump/guide vane/annular casing/relative position/radial force分类
农业科技引用本文复制引用
郭豹,刘厚林,谈明高,丁荣,王凯..导叶周向安装位置对离心泵叶轮径向力的影响[J].排灌机械工程学报,2016,34(3):204-209,6.基金项目
“十二五”国家科技支撑计划项目（2013BAK06B02）；国家自然科学基金资助项目（51209105）；江苏省六大人才高峰计划项目 （）
