Variable radius springback wavy seal

Details Variable radius springback wavy seal Variable radius springback wavy seal

1977-02-07

1978-08-01

Ward, Jr., Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 70, 277160, 415113, 415172A, F16J 1548, F01D 520

Patent

active

041039050

ABSTRACT:
A variable radius labyrinth seal arrangement for use in a steam turbine apparatus is characterized by a flexible strip member having mounted substantially perpendicular thereto a series of corrugated uprights. The strip is received within a circumferential groove provided in the turbine casing and is flexible to conform to the curvature of the groove, thus permitting seal use in a variety of turbine sizes. The amplitude of the corrugations, or waviness, of the uprights varies in accordance to the magnitude of the flexure of the strip necessary for the strip to conform to the groove curvature. The strip is movably biased within the groove and responds to forces generated by contacts between the uprights and rotating turbine elements by displacing radially outward from that contact.

REFERENCES:
patent: 935286 (1909-09-01), Westinghouse
patent: 945180 (1910-01-01), Ljungstrom
patent: 1338955 (1920-05-01), Parsons et al.
patent: 1694566 (1928-12-01), Solenberger
patent: 2486088 (1949-10-01), Yaros
patent: 2945730 (1960-07-01), Murray et al.
patent: 2946609 (1960-07-01), Comery
patent: 3082010 (1963-03-01), Morley et al.
patent: 3109661 (1963-11-01), Swaim et al.
patent: 3501246 (1970-03-01), Hickey
patent: 3503616 (1970-03-01), Hickey

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