Patent ID: 6422808
Filing Date: 2002-07-23
Classification: F04D

Abstract:
A regenerative pump for adding energy to a fluid comprising:a casing having a fluid inlet and a single fluid outlet separated by a stripper, said casing being radially split and including an impeller housing and an impeller cover, having axially spaced, radially extending first and second side walls defined therein; an impeller having a series of impeller blades enclosed within said casing, and said impeller having an axis of rotation and axially spaced, radially extending first and second surfaces facing said first and second side walls of said casing, respectively, forming a blade system open between impeller blades at its radial end; and a pair of flow chambers, one flow chamber formed in each of said impeller cover and said impeller housing and axially on either side of said impeller, for defining a flow path between said fluid inlet and said single fluid outlet, said flow path defining at least one of said chambers tapering axially along substantially all of its length between said fluid inlet and said single fluid outlet such that a first cross-sectional area at said fluid inlet is greater than a second cross-sectional area at said single fluid outlet.