Rotating seal arrangement for turbine bucket cooling circuits

Details Rotating seal arrangement for turbine bucket cooling circuits Rotating seal arrangement for turbine bucket cooling circuits

2006-05-30

2006-05-30

Nguyen, Ninh H. (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Multiple axially spaced working members

C416S248000

Reexamination Certificate

active

07052240

ABSTRACT:
The dovetails of turbine buckets are received in dovetail grooves between circumferentially adjacent wheelposts on a turbine wheel of a gas turbine rotor. The wheel and a spacer are rabbeted one to the other and an axially forwardly extending projection on each bucket dovetail is undercut to space the bucket projection from the outer rim of the spacer eliminating stress on the bucket from the spacer. A cavity is formed between radially outwardly converging wall portions of the spacer and end faces of the wheelposts and bucket dovetails. An annular seal wire conforms and seals between the spacer wall portions and end faces of the wheelposts and bucket dovetails in response to centrifugal forces during turbine operation.

REFERENCES:
patent: 4480958 (1984-11-01), Schlechtweg
patent: 4484858 (1984-11-01), Kurosawa et al.
patent: 4500098 (1985-02-01), Wilcox et al.
patent: 5622475 (1997-04-01), Hayner et al.
patent: 5630703 (1997-05-01), Hendley et al.
patent: 6655913 (2003-12-01), Vedantam et al.

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