Cavitation-resistant inducer.

摘要

An improvement in an inducer (18) for a pump wherein the inducer includes a hub, a plurality of radially extending substantially helical blades (22) and a wall member (24) extending about and encompassing an outer periphery of the blades (22). The improvement comprises forming adjacent pairs of blades (22) and the hub to provide a substantially rectangular cross-sectional flow area which cross-sectional flow area decreases from the inlet end of the inducer (18) to a discharge end of the inducer (18).