Centrifugal pump impeller with adjustable balance hole state

The invention discloses a centrifugal pump impeller with an adjustable balance hole state. The impeller comprises a blade assembly, a rear plate, a hub and a balance hole adjusting assembly. The blade assembly is fixedly welded to one end face of the rear plate, the balance hole adjusting assembly is installed on the other end face of the rear plate, a shaft hole is formed in the center of the rear plate, the hub is fixedly installed in the shaft hole, and a plurality of rear plate balance holes arranged at intervals are formed in the rear plate in the circumferential direction of the shaft hole; and the balance hole adjusting assembly controls the state of the multiple rear plate balance holes, and the adjustable balance hole state is achieved. By means of the centrifugal pump impeller, the performance of a pump can be effectively improved; whether the balance holes are opened or not can be selected according to different working conditions, so that the centrifugal pump finds an optimal working condition poi