在某些矿井,选用的离心式水泵,其额定扬程较工况点扬程有过大的富裕量时,导致水泵在运行中流量过大,排水系统效率偏低,有时甚至发生汽蚀损坏。在这种情况下采用减级或切削叶轮等方法来调节水泵工况点,从而使水泵运行既安全又经济。本文试就离心泵减级和切削叶轮的节能效益进行粗浅的分析。 In some mines, the choice of centrifugal pumps, the rated head lift than the operating conditions have too much margin, resulting in the pump flow in the operation is too large, the drainage system is inefficient, and sometimes cavitation damage. In this case, downgrading or cutting impeller and other methods to adjust the pump operating point, so that the pump is safe and economical operation. This paper tries to superficial analysis on the energy-saving benefits of centrifugal pump cutting and cutting impeller.