Centrifugal pump with inducer

摘要

A centrifugal pump wherein the inducer in front of the impeller is a propeller and has a hub whose rear end face, which is immediately adjacent to the front end portion of the impeller, has a circumferential groove. When the pump is in operation, especially in the partial load range, the customary turbulence develops in the groove so that it does not interfere with the flow of fluid from the intake into the impeller. This reduces the tendency of fluid to pulsate with attendant reduction of noise.