Rotary kinetic fluid motors or pumps – With means for re-entry of working fluid to blade set – Cross flow runner
Patent
1982-07-16
1986-01-21
Garrett, Robert E.
Rotary kinetic fluid motors or pumps
With means for re-entry of working fluid to blade set
Cross flow runner
F04D 902
Patent
active
045654891
ABSTRACT:
A self-priming centrifugal pump wherein an external formation of a mixture formed of a storage liquid and drawn-in air from a suction line begins during a priming operation. The mixture is conveyed into a venting chamber arranged above a pump impeller wherein the air is at least partially separated and the liquid is recycled into two partial quantities to a pump volute to repeat the mixture formation. The first partial quantity is conducted to the pump volute by way of a backflow duct and a nozzle. The second partial quantity passes through a stilling chamber and surrenders or releases any residual amount of air contained in the second partial quantity. A connection between the stilling chamber and pump volute terminates into the pump volute downstream of the nozzle and is exposed by the nozzle jet in an ejector-type manner thereby enabling the accomplishment of a rapid venting of the suction line during the priming operation as well as an achievement of a high degree of efficiency and delivery during a liquid conveying process by the pump.
REFERENCES:
patent: 2428487 (1947-10-01), Fernstrum
patent: 2755743 (1956-07-01), Rupp
patent: 3322071 (1967-05-01), Teter
patent: 4355950 (1982-10-01), Pollak
Garrett Robert E.
Motoren- und Turbinen-Union Friedrichshafen GmbH
Pitko Joseph M.
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