Rotary kinetic fluid motors or pumps – Working fluid passage or distributing means associated with... – Casing having tangential inlet or outlet
Patent
1990-08-08
1992-04-07
Look, Edward K.
Rotary kinetic fluid motors or pumps
Working fluid passage or distributing means associated with...
Casing having tangential inlet or outlet
415 562, 415 565, 416223B, 417299, F01D 2524
Patent
active
051022974
ABSTRACT:
A volute type centrifugal pump has an impeller rotatably mounted in a volute chamber of the pump casing adjacent a cutwater within the casing. The impeller includes a hub having a pair of diametrically extending vanes with the outer end portion of each vane being angled in a trailing direction relative to the direction of rotation of the impeller. A semi-cylindrical projection having an axis parallel to the axis of the hub is formed on a trailing surface of each angled portion adjacent an outermost end thereof thereby reducing cavitation on the trailing surface of the impeller to reduce drag and turbulence while increasing pressure on the trailing surface. The surface of the semi-cylindrical projection is roughened to enhance hydraulic jump.
REFERENCES:
patent: 1382665 (1921-06-01), Myers
patent: 2291760 (1942-08-01), Rupp
patent: 2627812 (1953-02-01), Mann
patent: 2994275 (1961-08-01), Stepnica
patent: 3381618 (1968-05-01), Napolitano
patent: 3425436 (1969-02-01), Napolitano
patent: 3726618 (1973-04-01), Dicmas
patent: 3856429 (1974-12-01), Pettersson
patent: 4932837 (1990-06-01), Rymal
Look Edward K.
Verdier Christopher M.
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