Centrifugal pump

The utility model discloses a centrifugal pump which comprises a volute, a rear cover plate and an impeller, the impeller is arranged between the volute and the rear cover plate in a rotating mode, and blades are connected to the impeller. Axial holes are formed in the blades, and the axial holes penetrate through the blades and the impeller; the multiple axial holes are formed in the blade in the extending direction of the blade at intervals, and at least one of the following effects can be achieved, liquid backflow in a blade top gap is reduced, cavitation is reduced, axial force is balanced, and therefore the efficiency of the centrifugal pump is improved. 本实用新型公开了一种离心泵，包括蜗壳、后盖板和叶轮，所述叶轮转动设置在蜗壳和后盖板之间，所述叶轮上连接有叶片；所述叶片上开设有轴向孔，所述轴向孔贯穿于所述叶片和叶轮；所述轴向孔为若干个，若干个轴向孔沿叶片的延伸方向间隔布置在叶片上，能够至少能起到以下作用的一种，降低叶顶间隙液体回流、降低汽蚀和平衡轴向力，从而提高离心泵效率。