Bell seal of improved stability for high pressure turbines

Details Bell seal of improved stability for high pressure turbines Bell seal of improved stability for high pressure turbines

1987-12-31

1989-02-07

Cuchlinski, Jr., William A.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 72R, 277DIG2, F16J 1500

Patent

active

048026794

ABSTRACT:
A bell seal assembly for the nozzle chamber unit of an elastic fluid turbine, such as the steam turbine used to drive electrical utility generators. The bell seal assembly includes a bell seal unit and a retaining nut unit; the seal skirt depends from a mounting flange. The outer skirt surface is subdivided into an upper skirt surface, an intermediate portion and a lower skirt margin. The intermediate portion is the primary skirt seal region, and the lower skirt margin is tapered inwardly toward the skirt end surface. The lower skirt margin includes a plurality of spaced apart, circumferentially extending grooves one of which terminates adjacent the lower edge of a sealing land on the primary seal portion of the skirt.

REFERENCES:
patent: 3907307 (1975-09-01), Stock
patent: 3907308 (1975-09-01), Stock
patent: 4426087 (1984-01-01), Sargent et al.
patent: 4743162 (1988-05-01), Pope

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