Rotary kinetic fluid motors or pumps – Working fluid passage or distributing means associated with... – Casing having tangential inlet or outlet
Patent
1990-01-18
1991-08-20
Look, Edward K.
Rotary kinetic fluid motors or pumps
Working fluid passage or distributing means associated with...
Casing having tangential inlet or outlet
415207, 4152151, F01D 100
Patent
active
050409476
ABSTRACT:
A pump casing manufactured by press forming of steel plate and including a volute casing encircling a pump impeller so as to form a fluid path around the pump impeller is disclosed. The cross-sectional area of the fluid path is gradually increased towards a discharge port of the pump casing. The pump casing includes a casing body which is formed at first by press forming a metal plate into a cylindrical cup shape having an opening portion at one side thereof and a closed bottom portion at the other side of the same, and then by press forming the cylindrical cup shaped casing body so as to have a volute portion radially outwardly expanded from a cylindrical surface of the casing body at an axially intermediate portion thereof which radially opposite to the pump impeller, a casing flange outwardly extending from the opening portion and an aperture serving as a suction port at the bottom portion.
Since no separate volute member is provided within the pump casing to form the volute portion, the outer diameter of the pump casing can be made small and also the shape of the fluid path in the volute casing can be made smooth.
REFERENCES:
patent: 2677327 (1954-05-01), MacNeille et al.
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patent: 3412684 (1968-11-01), Lipe
patent: 3620042 (1971-11-01), Gray
patent: 3877834 (1975-04-01), Speck et al.
patent: 4247250 (1981-01-01), Lipe et al.
patent: 4775295 (1988-10-01), Starke et al.
patent: 4826401 (1989-05-01), Clark et al.
Soviet Inventions Illustrated, Derwent Publicat. Ltd., Section General/Mechanical, Accession N0C6646 K/08, Apr. 6, 1984.
Arakawa Shinichiro
Ikeda Hideo
Kajiwara Ken-ichi
Mori Kikuichi
Ebara Corporation
Look Edward K.
Nguyen Hoang
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