Accession Number:

ADD015887

Title:

Variable Breadth Impeller that Provides a Specific Shutoff Head.

Descriptive Note:

Patent, Filed 20 Apr 92, patented 18 May 93,

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s):

Report Date:

1993-05-18

Pagination or Media Count:

12.0

Abstract:

In accordance with the present invention, an improved variable breadth impeller for use in a variable capacity centrifugal pump and a method for adapting a variable capacity centrifugal pump to produce a specific predetermined shutoff head are provided. The variable breadth impeller is a two piece unit comprising an impeller element having a plurality of radially extending impeller vanes thereon and an axially movable shroud having a plurality of radially extending grooves therein for receiving the impeller vanes in a meshing relationship. The movable shroud further includes a plurality of axially extending grooves in its outer peripheral surface which act as a supplemental pumping means between minimum flow rate condition and shutoff condition. The operation of the improved variable breadth impeller results in a specific predetermined pressure head being attained and maintained at pump shutoff operating condition.

Subject Categories:

  • Pumps, Filters, Pipes, Tubing, Fittings and Valves
  • Marine Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE