Influence of mixed sand on wear of centrifugal pump with semi-open impeller
WANG Yong1*, LI Gangxiang1, YUAN Xiao2, ZHANG Guoxiang1, Wu Pu1, LIU Houlin1
1. National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212000, China; 2. Jiangsu Zhenhua Pump Industry Co., Ltd., Taizhou, Jiangsu 225500, China
Abstract：In order to study the influence of sand-bearing water with mixed particle sizes on the wear characteristics of centrifugal pump components, using RNG k-ε turbulence model and SIMPLEC algorithm, based on particle discrete phase model(DPM)and semi-empirical McLaury erosion model, the Rosin-Rammler distribution fitting method was used for sand injection, and wear characteristics of solid-liquid two-phase flow in a semi-open centrifugal pump were numerically analyzed. The results show that the large particles in the impeller passage tend to move towards the suction surface of the blade. When the particle size of the mixed sand is small, the movement of the sand particles in the volute is more uniform. The larger the particle size is, the closer the movement of the sand particles is to the volute wall. The average residence time distribution of sand particles with different particle sizes is similar on the pressure surface, suction surface and back shroud. The larger the particle size is, the smaller the average residence time is. The distribution of the mean residence time of the sand particles with particle size not more than 700 μm on the volute wall was similar to that of the sand particles on the impeller′s flow wall. The mean residence time of the sand particles with particle size greater than 700 μm increased with the increase of the particle size. With the increase of the large particle size of the sand component, the wear strength of the pressure surface of the blade decreases gradually, while that of the suction surface of the blade, the back shroud and the volute increases gradually.
王勇*,李刚祥,袁霄,张国翔,吴璞,刘厚林. 混合沙粒对半开式叶轮离心泵磨损的影响[J]. 排灌机械工程学报, 2021, 39(8): 764-769.
WANG Yong*,LI Gangxiang,YUAN Xiao,ZHANG Guoxiang,Wu Pu,LIU Houlin. Influence of mixed sand on wear of centrifugal pump with semi-open impeller. Journal of Drainage and Irrigation Machinery Engin, 2021, 39(8): 764-769.
