Rotary kinetic fluid motors or pumps – Including additional means causing or controlling fluid flow...
Patent
1976-05-20
1977-07-26
Croyle, Carlton R.
Rotary kinetic fluid motors or pumps
Including additional means causing or controlling fluid flow...
415169A, 415170A, 277 15, F01D 1100, F04D 2908, F01D 1108
Patent
active
040379850
ABSTRACT:
A flushing liquid system for an improved wearing ring in a centrifugal pump which wearing ring has spaced flushing liquid inlet and outlet chambers, has a first control assembly for supplying flushing liquid to the flushing liquid inlet chamber and a second control assembly for returning or draining at least a portion of the flushing liquid through the flushing liquid outlet chamber, with respective first and second control assemblies either having a predetermined setting or operatively responsive to signals from sensory devices for sensing at least one or more operating conditions of the centrifugal pump so that the operation of the first and second control devices can act to minimize flushing liquid requirements of the wearing ring and minimize dilution by the flushing liquid of the process fluid or mixture being pumped by the centrifugal pump.
Additionally, the improved wearing ring for use in said flushing liquid system having a first groove on the outer surface thereof operative to form the flushing liquid inlet chamber connected to the source of flushing liquid, a second groove on the outer surface of the wearing ring disposed a spaced distance from said first groove operative to provide the flushing liquid outlet chamber, a plurality of first and second passages to communicate the respective first groove and second groove with the leakage joint formed by said wearing ring with the impeller for said centrifugal pump, said first groove and second groove operative to permit at least a portion of the flushing liquid delivered from said first groove to be returned or drained through the second groove.
Additionally, means formed in the leakage joint between the improved wearing ring and the impeller of the centrifugal pump to resist axial flow of the process fluid being pumped by the centrifugal pump into the leakage joint from either direction.
REFERENCES:
patent: 811642 (1906-02-01), Key
patent: 953627 (1910-03-01), Leighton
patent: 1770496 (1930-07-01), Lawaczeck
patent: 1999163 (1935-04-01), Allen
patent: 2021346 (1935-11-01), Allen
patent: 2736265 (1956-02-01), Higgins
patent: 3484113 (1969-12-01), Moore
patent: 3622164 (1971-11-01), Herbert
Karassik Igor J.
Thaw Charles H.
Bobis Daniel H.
Croyle Carlton R.
Holland Donald S.
Worthington Pump, Inc.
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