Abstract：In order to study the influence of blade arrangement on the radial force of double suction centrifugal pump, the unsteady simulation calculation of three blade arrangement scheme. Was carried out under the condition that other external factors remain unchanged. The results show that compared with the symmetrical arrangement scheme, the staggered 30° blade arrangement can effectively improve the head of centrifugal pump, and the staggered 15° blade has a negative effect on the head of centrifugal pump. At the same time, the efficiency of the centrifugal pump will be reduced by using the staggered arrangement scheme. Under the design condition, compared with the symmetrical arrangement scheme, the staggered arrangement of the blades can effectively reduce the pressure pulsation level in the centrifugal pump, and the larger the stagger angle, the more obvious the pressure pulsation level decreases. The staggered arrangement of blades can effectively reduce the magnitude of the steady-state radial force acting on the impeller, and the staggered arrangement of 30 ° can reduce the steady-state radial force by 42.284% under the condition of 1.1Qd. In the end, the staggered 30 ° arrangement of the blades has the most obviously effect on improving the pulsation characteristics and amplitude of the transient radial force on the impeller.
