基于正交试验的高速井泵优化设计

Optimization design of high-speed well pump based on orthogonal experiment

为了提升高速井泵的水力性能,探讨影响其性能的主次因素,以100QJ10型高速井泵为研究对象,按照L18(37)正交表,选取叶片出口宽度、叶轮出口直径、叶片数等7个因素,每个因素选取3个水平,共设计18组叶轮,并分别与同一个导叶装配.应用CFX 15.0软件对18组模型泵进行全流场数值模拟,利用极差分析法研究影响100QJ10型高速井泵性能的主要和次要因素.结果表明:叶片出口安放角和叶轮出口边斜切角度对高速井泵的水力性能影响较大;本次优化最优方案为叶轮出口宽度b2=6.5 mm,叶轮出口直径D2=80.5 mm,叶片出口安放角β2=27°,叶片数Z=7,叶片进口直径D1=40 mm,叶轮后盖板与反导叶最底端轴向间距h=3.5 mm,叶轮出口斜切角度为0°.分别对初始模型和优化模型进行外特性试验并对比分析,验证了正交试验结合数值模拟方法在高速井泵优化设计方面的可行性.

In order to improve the hydraulic performance of high-speed well pump and find out the primary and secondary factors affecting its performance,a high-speed well pump 100QJ10 was selected as the research object.An L18(37)orthogonal experiment was performed with seven factors such as blade outlet width,impeller diameter,number of blades,and each factor selects three levels.18 impellers were designed and assembled with the same guide vane respectively.CFX15.0 software was used to simulate the full flow field of 18 sets of model pumps.The primary and secondary factors affecting the performance of 100QJ10 high-speed well pump were studied by range analysis method.The results show that the blade outlet angle and the impeller outlet angle have great influence on the hydraulic performance of high-speed well pump.The optimal scheme is that the impeller outlet width b2=6.5 mm,the impeller outlet diameter D2=80.5 mm,the blade outlet angleβ2=27°,the number of blades Z=7,the blade inlet diameter D1=40 mm,the axial distance between the impeller hub and the bottom end of the reverse guide vane h=3.5 mm,and the impeller outlet bevel angle is 0°.The feasibility of orthogonal experiment combined with numerical simulation method in the optimization design of high-speed well pump was verified by hydraulic characteristic experiment of initial model and optimization model.