为了提高潜水轴流泵的水力性能，改善其内部流动状态。对潜水轴流泵进行正交试验法优化设计，选取叶轮、导叶、井筒为试验因素，每个因素取3个水平，设计了一个三因素三水平的正交方案。对每个方案进行试验测试，并对这9组方案的数值模拟结果进行分析得到最优方案。通过极差分析得到潜水轴流泵叶轮、导叶、井筒影响性能的大小顺序以及最优参数组合。试验结果表明，导叶叶片数对潜水轴流泵的扬程和效率影响程度最大。在设计工况点，综合分析所选出的最优方案扬程和效率均有所提高，优化方案的参数搭配能够有效减少潜水轴流泵的水力损失，提高其水力性能的同时改善泵段内部流动，达到优化设计的目的。

In order to improve the hydraulic performance of submersible axial flow pump and improve its internal flow state， the orthogonal test method is used to optimize the design of submersible axial flow pump. The impeller， guide vane and wellbore are selected as test factors. Each factor takes three levels， and a three factor and three-level orthogonal scheme is designed. Each scheme is tested， and the numerical simulation results of these 9 groups of schemes are analyzed to obtain the optimal scheme. Through a range analysis， the primary and secondary order and optimal parameter combination of impeller， guide vane and wellbore of submersible axial flow pump are obtained. The test results show that the number of guide vanes has the greatest influence on the head and efficiency of submersible axial flow pump. At the design operating point， the head and efficiency of the optimal scheme selected by a comprehensive analysis are improved. The parameter matching of the optimal scheme can effectively reduce the hydraulic loss of the submersible axial flow pump， improve its hydraulic performance and improve the internal flow of the pump section so as to achieve the purpose of optimal design.