Flow dam design for labyrinth seals to promote rotor stability

Details Flow dam design for labyrinth seals to promote rotor stability Flow dam design for labyrinth seals to promote rotor stability

2006-02-28

2006-02-28

Patel, Vishal (Department: 3673)

Seal for a joint or juncture

Seal between relatively movable parts

Close proximity seal

C277S412000, C277S416000, C415S119000, C415S173500

Reexamination Certificate

active

07004475

ABSTRACT:
A method and apparatus for reducing steam swirl in a steam turbine. A plurality of seal segments (14) are circumferentially juxtaposed to form a seal ring (12) encircling the turbine shaft (10), each seal segment (14) supporting a plurality of circumferentially disposed annular seal fins (20) to limit axial steam flow along the shaft (10). A plurality of flow dams (40) are disposed within grooves (42) defined in the plurality of seal fins (20) and seal segments (14) for limiting circumferential steam flow and thereby reducing rotor instability.

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