Hand-operated adjustment and compensation device for centrifugal pump impeller seal

A hand-operated adjustment and compensation device for centrifugal pump impeller seal is characterized by comprising an impeller, a shaft, a front guard plate, a sealing shaft sleeve, a set screw and a suction flange, wherein the impeller is installed at an end part of the shaft; the sealing shaft sleeve is installed in the front guard plate; a clearance is reserved between the end part of the sealing shaft sleeve and the impeller; and the set screw penetrates through the suction flange in the radial direction so as to be propped against the sealing shaft sleeve. The utility model has the advantages that the hand-operated adjustment and compensation device for the centrifugal pump impeller seal has a simple structure, is simple to operate and maintain, guarantees the original constant clearance between the impeller and the sealing shaft sleeve, achieves good sealing effect, enables fluid to be contacted with blades in advance for the energy acquisition, effectively reduces the occurrence frequency of cavitation erosion, and improves the operation efficiency of the pump.