%A LU Weigang*,WANG Dongwei,SHI Wei,LIU Jun,XU Lei %T Comparison of hydraulic performance between submersible tubular pump device with motor front and rear arrangements %0 Journal Article %D 2020 %J Journal of Drainage and Irrigation Machinery Engin %R 10.3969/j.issn.1674-8530.18.0210 %P 325-331 %V 38 %N 4 %U {http://zzs.ujs.edu.cn/pgjx/CN/abstract/article_2881.shtml} %8 2020-04-25 %X In order to make the submersible tubular pump device get better and more application in the pumping station with low head, a new type of motor front arrangement for submersible tubular pump device was put forward. Based on the design parameters of a large-scale submersible tubular pumping station, two types of submersible tubular pump systems which are submersible tubular pump devices with motor front and rear arrangement were designed respectively. The three-dimensional flow fields in the two types of submersible tubular pump devices were calculated and analyzed respectively with the method of numerical simulation. The head and efficiency of pump devices were predicted, and the hydraulic performances and structural characteristics of the two types of submersible tubular pump devices were compared. The results show that the water flow contracts gently and evenly with distinct flow lines in the inlet conduits of the two types of submersible tubular pump devices. The water flow diffuses gently without vortex or other bad flow pattern in the outlet conduit of the motor front arrangement scheme. The main flow is inclined to the lower right side and vortex exists on the upper left side of the conduit diffusion section in the outlet conduit of the motor rear arrangement scheme. The conduit head loss of the motor front arrangement scheme is small and the pump device efficiency is high; the hydraulic performance of the motor front arrangement scheme is better than that of the motor rear arrangement scheme. The motor seal of the motor front arrangement scheme is more reliable, the motor supporting structure is more reasonable and the hydraulic design of the guide vane of the pump is more mature. Therefore, the scheme of submersible tubular pump device with motor front arrangement should be given priority to the scheme of motor rear arrangement.