Paper pulp centrifugal pump with gas separation
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United States of America Patent
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Feb 11, 1992
Issued Date -
N/A
app pub date -
Jun 15, 1990
filing date -
Jul 25, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a centrifugal pump particularly adapted for pumping fibrous suspensions from within a reservoir, wherein the pump includes a rotor arranged wholly within the reservoir for cooperation with the bottom wall thereof to effect fluidization of suspension and discharge of the fluidized suspension from the reservoir for passage through the pump, wherein an entrained gas, such as air, is withdrawn from the pump by means of a unique pump-out mechanism disposed rearwardly of a shroud of an impeller of the pump and including pump-out vanes and a repeller shroud cooperating with the impeller shroud and pump-out vanes to define radially opening flow paths, wherein flow openings extend across the impeller shroud for flow communication with the radially opening flow paths. The mechanism may also include repeller vanes carried by the repeller shroud to extend rearwardly of pump-out vanes.
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