Case, particularly for centrifugal radial pumps, and method for

Details Case, particularly for centrifugal radial pumps, and method for Case, particularly for centrifugal radial pumps, and method for

1990-07-05

1991-08-20

Kwon, John T.

Rotary kinetic fluid motors or pumps

Working fluid passage or distributing means associated with...

4151991, 415206, 29888024, 29888025, 72 62, 72336, 72340, 723794, F01D 2524

Patent

active

050409468

ABSTRACT:
A case (1) for single- or multi-stage pumps having at least one centrifugal radial impeller, and a method for the manufacture of such case with metal plate. The case includes, for each stage and for each impeller, a substantially cylindrical lateral wall (2) and a device (15) for diffusing and directing the flow delivered from the impeller of each stage, which case has, in the lateral wall thereof, at least one volute with a uniformly increasing transverse cross section which is outwardly closed and is formed by an initial portion (17), an intermediate portion (18) and a final portion (19) which are mutually blended in a continuous manner. The initial and intermediate portions extend circumferentially to collect and diffuse the radial flow to the delivery port (4) of the impeller, whereas the end of the final portion is axially offset with respect to the initial and intermediate portions and is directed inwardly of the case to convey the flow toward a central region of the pressure chamber adjacent to the impeller.

REFERENCES:
patent: 2372917 (1945-04-01), Tuttle
patent: 2609775 (1952-09-01), Gaudreau
patent: 2634685 (1953-04-01), Buchi
patent: 3289923 (1966-12-01), Millman

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