Rotary kinetic fluid motors or pumps – With lubricating – sealing – packing or bearing means having... – For shaft sealing – packing – lubricating or bearing means
Patent
1993-04-23
1994-08-02
Look, Edward K.
Rotary kinetic fluid motors or pumps
With lubricating, sealing, packing or bearing means having...
For shaft sealing, packing, lubricating or bearing means
415176, 415178, F04D 2958
Patent
active
053339916
ABSTRACT:
A thermal fatigue prevention apparatus for a high temperature pump which includes an impeller in a high temperature pump casing, a pump shaft rotatably supported by a journal of a submerged bearing and projecting from a shaft through hole of a casing cover, and a shaft sealing device. The shaft sealing device is enclosed with a shaft sealing chamber which is supplied with a low temperature seal purging liquid, and a part of the seal purging liquid flows into the pump casing through the shaft through hole. A heater is provided within the high temperature pump, the heater raises the temperature of the low temperature seal purging liquid before the seal purging liquid flows into the pump casing by using the high temperature pumping liquid.
REFERENCES:
patent: 4005747 (1977-02-01), Ball
patent: 4775293 (1988-10-01), Boster
patent: 4932836 (1990-06-01), Boster
patent: 5143515 (1992-09-01), Boster et al.
Patent Abstracts of Japan, vol. 6, No. 150 (M-148) (1028), Aug. 10, 1982 & JP-A-57 068 585, Apr. 26, 1982.
Patent Abstracts of Japan, vol. 6, No. 150 (M-148) (1028), Aug. 10, 1982 & JP-A-57 068 584, Apr. 26, 1982.
Chubu Electric Power Company Inc.
Chugoku Electric Power Company, Inc.
Ebara Corporation
Hitachi , Ltd.
Hokuriku Electric Power Company
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