Abstract:In order to investigate the influence of the internal baffle length to the hydraulic characteri-stics of the compact high-speed magnetic pump and the radial force of the impeller, six volute schemes were proposed according to the different length of the internal baffle. The single volute was set as scheme 1, and the remaining double volute schemes were set as scheme 2 to scheme 6 according to the length of internal baffle. ANSYS-CFX software was used to simulate and analyze the flow field in the pump with various volute schemes under different working conditions(0.8Qd,1.0Qd and 1.2Qd). The static pressure distribution of the pump cross section plane with different volute schemes was obtained, and the radial force was analyzed. The scheme 4 was used as the prototype of the pump, and its calculation results were compared with the experimental results. The results show that compared with the single volute pump without baffle, the double volute pump with baffle is beneficial to balance the radial force of impeller. The maximum components of radial force of single volute in x and y directions are 151.2 N and 149.7 N respectively at rated flow, which is 1.5 times of that of scheme 4. At the same time, with the increase of baffle length, the head and efficiency of the pump gradually increases, and the radial force of the impeller decreases continuously. The deviation between the simulated and the experimental results of the head under the three conditions is less than 3.0%. The numerical simulation results are credible, which provides a useful reference for improving the hydraulic performance and balancing the radial force of the impeller for the compact high-speed magnetic pump.
孔繁余,钱文飞*,童凯,汪家琼,张坤. 隔板长度对紧凑型高速磁力泵水力特性及叶轮径向力的影响[J]. 排灌机械工程学报, 2021, 39(11): 1087-1092.
KONG Fanyu,QIAN Wenfei*,TONG Kai,WANG Jiaqiong,ZHANG Kun. Influence of baffle length on hydraulic performance and impeller radial force of compact high-speed magnetic pump. Journal of Drainage and Irrigation Machinery Engin, 2021, 39(11): 1087-1092.