Retractable packing rings for steam turbines

Details Retractable packing rings for steam turbines Retractable packing rings for steam turbines

1993-12-06

1995-11-07

DePumpo, Daniel G.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 56, F16J 1548

Patent

active

054642264

ABSTRACT:
In a steam turbine having retractable, spring-loaded, segmented, arcuate packaging rings and holders suspended in the turbine casing and circumscribing the turbine rotor, the packing rings and holders being interengaged by a hook fit and the packing rings being movable by steam pressure between opened and closed position relative to the holders and the rotor, the improvement which comprises providing each of the packing rings and holders with identical mating, curved profiles for providing full contact between the packing rings and holders in the opened position of the packing rings.

REFERENCES:
patent: 1689735 (1928-10-01), Losel
patent: 3155395 (1964-11-01), Hoffman
patent: 3408048 (1968-10-01), Scalzo
patent: 3503616 (1970-03-01), Hickey
patent: 3529904 (1970-09-01), Scalzo et al.
patent: 4017088 (1977-04-01), Lerjen
patent: 4466620 (1984-08-01), Orlowski
patent: 5002288 (1991-03-01), Morrison et al.

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