本文指出轴流式泵轮内的流动只有偏离,“偏离”并非由轴向漩涡引起的。阐明了“偏离”系数与 t/1,B、K 等参数的关系,并指出只有轴流泵的叶栅扬程修正系数等于叶栅的“偏离系数”,同时指出轴流泵各叶栅的扬程(H_r)与流量关系是不同斜率不同截距的斜直线。故轴流泵叶轮沿半径非等环量的设计是有根据的,最后导出了偏离角的理论公式。 This paper points out that there is only deviation in the flow in the axial flow impeller, and “deviation” is not caused by the axial vortex. The relationship between “deviation” coefficient and t / 1, B, K and other parameters is clarified. It is pointed out that only the lift coefficient of cascade lift of axial flow pump is equal to the “deviation coefficient” of cascade and the lift of each cascade of axial flow pump (H_r) is related to the flow rate of the slope of a different oblique intercept oblique line. Therefore, the axial flow impeller along the radius of non-equal ring design is based on, and finally derived the theoretical formula off-angle.