Sealing shroud centrifugal pump

Details Sealing shroud centrifugal pump Sealing shroud centrifugal pump

1985-07-09

1987-02-24

Garrett, Robert E.

Pumps

Motor driven

Electric or magnetic motor

415105, 415106, 415116, F04B 3504, F04D 2904

Patent

active

046454330

ABSTRACT:
In a centrifugal pump containing a sealing shroud the pump impeller is mounted only radially for rotation on a stationary axle or shaft. The stationary axle or shaft is fixed in the suction connection by means of wing rib supports or ribs and possesses an equalizing channel which connects the pump chamber portion at the rear of the pump impeller with the suction connection. This pump chamber portion at the rear of the pump impeller is connected with the delivery or pressure connection, whereas the pump chamber portion at the front side of the pump impeller is also connected with the suction connection as well as with the delivery or pressure connection. Advantageously, throttling rings are provided for self-metering throughflow throttling, depending on the axial position of the pump impeller. Additionally, the throughflow can be regulated by a throttling screw which is provided for the equalizing channel. In this way the pump impeller requires no axial or thrust bearing and can automatically adjust itself to variable requirements within a predetermined range.

REFERENCES:
patent: 2970548 (1961-02-01), Berner
patent: 3373927 (1968-03-01), Miller
patent: 3597117 (1971-08-01), Zoehfeld
patent: 3825366 (1974-07-01), Herrick
patent: 4013384 (1977-03-01), Oikawa
patent: 4047847 (1977-09-01), Oikawa
patent: 4304532 (1981-12-01), McCoy

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