Multistage pump impeller capable of improving efficiency of water pump and reducing inter-stage leakage

The utility model provides a multistage pump impeller capable of improving the efficiency of a water pump and reducing the inter-stage leakage, which comprises an impeller (3), and a single-rotation upward spiral sealing groove (4) is arranged on the outer circle of a water inlet of the impeller (3). By using the impeller of which the inlet excircle is used for processing the spiral sealing groove, the interstage leakage of the water pump is reduced by 60 percent, and the efficiency of the water pump can be improved by 35 percent. 本实用新型提出了一种提高水泵效率降低级间泄漏的多级泵叶轮，其包括叶轮(3)，所述叶轮(3)进水口外圆设置有单旋向上螺旋密封槽(4)。通过使用这种进口外圆加工螺旋密封槽的叶轮，水泵级间泄漏减少60％，水泵效率可提高3-5％。