Blade design method for three-section quartic function type load distribution control and vane pump designed by blade design method

The invention discloses a three-section quartic function type load distribution control vane design method and a vane pump designed by the same. The method comprises the following steps: taking a liquid inflow side of a blade as a blade inlet side, taking a liquid outflow side of the blade as a blade outlet side, and dividing a plurality of corresponding blade streamlines at different blade heights of the blade from the blade inlet side to the blade outlet side; the included angle formed by the projection of the blade streamline on the plane perpendicular to the rotating shaft of the blade and the circumferential direction with the rotating shaft as the center is the placing angle, and the placing angle is determined according to the distribution rule of blade load changes from the blade inlet edge to the blade outlet edge. And the distribution rule of the blade load change meets the rule of a three-section quartic polynomial function. Secondary flow in the vane pump can be reduced and restrained, the efficie