Rotary kinetic fluid motors or pumps – Pump having rotating inlet end or scoop immersed in liquid
Patent
1985-11-12
1987-06-23
Garrett, Robert E.
Rotary kinetic fluid motors or pumps
Pump having rotating inlet end or scoop immersed in liquid
415 80, F04D 112
Patent
active
046749500
ABSTRACT:
The improved pitot tube is useful in pitot type centrifugal pumps and is located within a rotor in the pump. The pitot tube projects radially from the axial center line of the pump and has an entry adjacent to the inside of the wall of the rotor. The entry is oriented circumferentially to receive fluid energized by the rotor. The pitot tube has a passageway therethrough which extends from the entry to an outlet located on the axial center line of the pump. Between the entry and outlet there is provided an entry transition portion that is curved to change the direction of flow from centrifugal to radial, a radial portion, and an outlet transition portion that is curved to change the direction of flow through the passageway from radial to axial. Located in the passageway are one or more ribs or vanes which are curved through the entry transition portion of the passageway and extend into the outlet thereof. The ribs provide for streamlining the flow to avoid turbulence to decrease the internal drag in the passageway and also to reinforce the pitot tube so that the walls thereof may be made substantially thinner whereby outside width of the tube can be decreased to reduce the external drag loss.
REFERENCES:
patent: 3671136 (1972-06-01), O'Mara et al.
patent: 3977810 (1976-08-01), Erickson et al.
patent: 4209080 (1980-06-01), Douglas
patent: 4322199 (1982-03-01), Erickson
Dresser Industries Inc.
Garrett Robert E.
Kwon John
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