Mixed-flow pump

The invention discloses a mixed-flow pump. The mixed-flow pump comprises a volute and an impeller; the outlet of the volute is communicated with the inlet of the impeller; the volute is inclined relative to a center line at a rotation shaft of the impeller so that a center line of the outlet of the volute has a flowing taper angle theta relative to a center line at the rotation shaft of the impeller. The inclination of the outlet of the volute is capable of playing a role in improving the incoming flow at the inlet of the mixed-flow pump as a turbine impeller, thereby decreasing the hydraulicloss and enhancing the performance of the mixed-flow pump as a turbine set. The mixed-flow pump can be widely applied in the large-flow and low-water head micro hydropower stations. 本发明公开了一种混流泵，所述混流泵包括蜗壳和叶轮；所述蜗壳的出口与所述叶轮的进口连通；所述蜗壳相对所述叶轮的转轴处中心线倾斜设置，以使所述蜗壳出口的中心线相对所述叶轮的转轴处中心线存在流动锥角θ。蜗壳出口的倾斜放置能够起到改善混流泵作透平叶轮进口来流的作用，有利于减少水力损失，提升混流泵作透平机组性能。本发明可广泛应用于大流量、低水头微型水力发电站中。