沿用出口导叶的大型轴流泵改造方案探讨

Study on reform scheme with exit guide vane remained for large axial flow pumps

对大泵改造保留出口导叶的叶轮改型方案作了深入的探讨 .分析了不动导叶时泵改前后性能设计参数之间的变化关系 ,指出这种改型方案存在的局限性 ,提出了机组增容或导叶切割的辅助措施 .

A reform scheme with exit guide vane remained for large axial flow pumps is discussed deeply. The variation of design parameters of pump performance before and after its impeller reform with exit guide vane remained, is analyzed. And limitation of this reform scheme is pointed out too. Finally, some auxiliary measures, increasing power capacity of unit and cutting guide vanes, are put forward.