Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1992-12-07
1994-09-06
Cuchlinski, Jr., William A.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277 53, 277 56, 277 58, 277 79, 4151682, F16J 15447
Patent
active
053441605
ABSTRACT:
A shaft sealing system for a steam turbine includes at the high-pressure inlet end an outer air seal (40 ) and an outer steam seal (42 ) each comprised of segmented circumferential seals and a plurality of labyrinth seals (44, 46, 48). The low-pressure end of the turbine is provided with a segmented circumferential seal (60) substantially precluding ingress of air past the seal. The steam leaking past the inner two labyrinth seals (46 and 48) is returned to a stage of the turbine by a first leak-off pipe system (50). Air leaking past the air seal and steam leaking outwardly past the outer steam seal (42) is piped to the main condenser (58). High-pressure steam between the outer steam seal (42) and the outermost labyrinth seal (44) is piped via a second leak-off path (56) to a turbine stage downstream from the first-mentioned turbine stage.
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"Shaft Seals-Circumferential Seals for Use as Oil Seals," P. C. Stein 33rd Annual Meeting of ASLE, Apr. 18, 1978, Dearborn, Mich.
Missana Adrian
Scarlata Steven P.
Cuchlinski Jr. William A.
Cummings Scott W.
General Electric Company
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