对四种不同几何参数的低比速注水泵导叶,配以相同的叶轮进行了对比试验。得出了不同几何参数的泵级导叶中水力损失的分布规律,初步摸清了导叶几何参数,特别是导叶扩散管的几何参数,对泵极性能及泵效影响的规律。研制出一种新型流道式导叶结构,使泵效有显著提高,所研制的高效率导叶,可以推广应用于其它低比速多级离心泵的更新改造。 Four different geometric parameters of low specific speed water injection pump guide vane, with the same impeller for comparison test. The distribution rules of hydraulic losses in pump guide vanes with different geometrical parameters are obtained. The geometric parameters of guide vanes, especially the geometry parameters of guide vane diffuser pipes, are preliminarily found out, which influence the pump pole performance and pump efficiency. Developed a new type of flow guide vane structure, the pump efficiency has been significantly improved, the high efficiency guide vane developed can be widely applied to other low-speed multi-stage centrifugal pump renovation.