Leaf seal for inner and outer casings of a turbine
Patent
·
OSTI ID:874643
- Hendersonville, NC
- 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 Company (Schenectady, NY)
- 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
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Related Subjects
/277/415/
adjoining
annular
annular seal
arcuate
capacity
casings
circumferential
circumferentially
clearance
contract
contraction
cover
cover plate
edges
enable
expand
expansion
extending
flow
form
gap
gaps
inner
joint
leaf
leakage
maintained
minimum
narrow
opposed
outer
overlying
plate
plurality
projecting
radially
recess
reduced
retain
seal
sealing
sealing surface
segment
segments
spaced
spanning
spans
surfaces
turbine
adjoining
annular
annular seal
arcuate
capacity
casings
circumferential
circumferentially
clearance
contract
contraction
cover
cover plate
edges
enable
expand
expansion
extending
flow
form
gap
gaps
inner
joint
leaf
leakage
maintained
minimum
narrow
opposed
outer
overlying
plate
plurality
projecting
radially
recess
reduced
retain
seal
sealing
sealing surface
segment
segments
spaced
spanning
spans
surfaces
turbine