Leaf seal for inner and outer casings of a turbine

Patent · Tue Jan 01 00:00:00 EST 2002

OSTI ID:874643

Schroder, Mark Stewart ^[1]; Leach, David ^[2]

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1. Hendersonville, NC
2. Simpsonville, SC

A plurality of arcuate, circumferentially extending leaf seal segments form an annular seal spanning between annular sealing surfaces of inner and outer casings of a turbine. The ends of the adjoining seal segments have circumferential gaps to enable circumferential expansion and contraction of the segments. The end of a first segment includes a tab projecting into a recess of a second end of a second segment. Edges of the tab seal against the sealing surfaces of the inner and outer casings have a narrow clearance with opposed edges of the recess. An overlying cover plate spans the joint. Leakage flow is maintained at a minimum because of the reduced gap between the radially spaced edges of the tab and recess, while the seal segments retain the capacity to expand and contract circumferentially.

• Research Organization: General Electric Co., Schenectady, NY (United States)
• DOE Contract Number: FC21-95MC31176
• Assignee: General Electric Company (Schenectady, NY)
• Patent Number(s): US 6431555
• OSTI ID: 874643
• Country of Publication: United States
• Language: English

Related Subjects

leaf
seal
inner
outer
casings
turbine
plurality
arcuate
circumferentially
extending
segments
form
annular
spanning
sealing
surfaces
adjoining
circumferential
gaps
enable
expansion
contraction
segment
projecting
recess
edges
narrow
clearance
opposed
overlying
cover
plate
spans
joint
leakage
flow
maintained
minimum
reduced
gap
radially
spaced
retain
capacity
expand
contract
cover plate
sealing surface
annular seal
/277/415/