Seitenkanalpumpe.

摘要

A regenerative toric pump in which undesirable noise generation and leakage through clearance gaps (26,36) between the impeller (46) and housing (20) is minimized includes an impeller (46) having vanes (58,60) lying in general planes radiating from the impeller axis (A) disposed at variable spacings from each other in a geometrically balanced pattern. Recesses (80,82,84) in one of opposed side surfaces on the impeller (46) and housing (20) are arranged in a pattern such as to minimize leakage through the clearance gap (26,36) between those surfaces from points in the pump chamber which are at different pressures.