Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1995-03-21
1997-01-14
DePumpo, Daniel G.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
138 31, F16J 1500, F16L 5504
Patent
active
055931634
ABSTRACT:
In a seal oil system utilized to supply oil to shaft seals of a generator for preventing pressurized gas inside the generator from escaping through an interface of the generator shaft and the generator frame, wherein seal oil is supplied to said seals via a main supply line at a predetermined pressure, the improvement comprising at least one differential pressure accumulator including a barrel having an upper inlet end and a lower outlet end, and a piston slidably mounted in said barrel and movable between said inlet end and said outlet end; a first chamber above said piston having liquid supplied thereto at a pressure equal to internal gas pressure of the generator; a second chamber below said piston charged with generator seal oil; and means for enabling said at least one accumulator to discharge generator seal oil to said main supply line upon temporary decrease in pressure in said main supply line.
REFERENCES:
patent: 3176996 (1965-04-01), Barnett
patent: 3942323 (1976-03-01), Maillet
patent: 4005580 (1977-02-01), Swearingen
patent: 4031704 (1977-06-01), Moore et al.
patent: 4058320 (1977-11-01), Kosanovich
patent: 4492528 (1985-01-01), Bentley
patent: 4551079 (1985-11-01), Kain
patent: 4905502 (1990-03-01), Gram
Bird, Jr. William L.
Daiber Paul C.
DePumpo Daniel G.
General Electric Co.
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