Improvement method of centrifugal pump steady flow impeller

The invention provides an improvement method of centrifugal pump steady flow impeller. The method comprises the following steps: step (1), simulating flow physical parameters inside the centrifugal pump; step (2), figuring out curves of lift and efficiency as well as speed distribution, pressure distribution and flow line distribution of water flow nearby where the blades contact with the wheel disk, based on the obtained flow physical parameters of the master mold centrifugal pump; step (3), calculating to obtain flow physical parameters of the centrifugal pump which is provided with the improved blades and wheel disk; and step (4), comparing the flow physical parameters of the master mold centrifugal pump and the flow physical parameters of the centrifugal pump which is provided with the improved blades and wheel disk. The flow condition of the improved centrifugal pump is increased by certain degrees; the flow condition inside the flow path is improved by certain degrees; the flow line distribution and the pressure distribution nearby where the blades contact with the wheel disk are more even; the adverse pressure gradient is reduced by certain degrees; and the stability of the centrifugal pump is increased.