基于正交试验的多级井用潜水泵叶轮出口与导叶进口参数匹配研究

为提高多级井用潜水泵的效率,同时保证泵的扬程,以200QJ50-65型5级井用潜水泵为例,按照L9(34)正交表,选取了叶轮出口边斜度、叶轮出口边与导叶进口边间隙、导叶进口边宽度3个因素,每个因素取3个水平,组合出9组方案。采用CFD数值模拟对多级井用潜水泵的前两级进行了全流场数值模拟,获得了9组方案在额定工况下的效率、扬程。通过正交试验法和极差分析得到了各因素对效率和扬程的影响规律以及各因素对泵效率、扬程影响的主次顺序,提出了多级井用潜水泵叶轮出口与导叶进口匹配的最佳方案。结果表明:优化方案在额定工况下相比原模型泵的效率提高了4.87%,单级扬程提高了2.8 m。通过内流场分析得到了优化后泵的水力性能提高的原因。

Research on the Matching of Impeller Outlet and Guide Vane Inlet Parameters of Multi-stage Submersible Well Pump Based on Orthogonal Test

200QJ50-655-stage submersible pump is taken as an example to study the influence of structural parameters on the performance of submersible well pumps to improve the efficiency and ensure the head based on orthogonal test.In the L9(34)orthogonal table,three factors are selected:the slope of the impeller outlet side,the gap between the impeller outlet and the guide blade inlet,and the width of the guide vane inlet,3 levels of each factor are taken and then 9 schemes are designed.CFD numerical simulation is used to simulate the full flow field of the first two stages of the pump,and the efficiency and head of 9 schemes under rated working conditions are obtained.By means of orthogonal test and range analysis,the influence law of each factor on efficiency and head and the order of influence of each factor on pump efficiency and head are obtained,and the best matching scheme between the impeller outlet and guide vane inlet parameters is proposed.The results show that the efficiency of the best scheme is improved by 4.88%under rated working conditions,and head of single-stage increased by 2.41 m.Through an analysis of internal flow field,the reasons for the improvement of hydraulic performance of the pump after optimization are obtained.