Leaf seal for inner and outer casings of a turbine
Abstract
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.
- Inventors:
-
- Hendersonville, NC
- Simpsonville, SC
- Issue Date:
- Research Org.:
- General Electric Co., Schenectady, NY (United States)
- OSTI Identifier:
- 874643
- Patent Number(s):
- 6431555
- Assignee:
- General Electric Company (Schenectady, NY)
- Patent Classifications (CPCs):
-
F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01D - NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
F - MECHANICAL ENGINEERING F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04 F05D - INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- DOE Contract Number:
- FC21-95MC31176
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 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/
Citation Formats
Schroder, Mark Stewart, and Leach, David. Leaf seal for inner and outer casings of a turbine. United States: N. p., 2002.
Web.
Schroder, Mark Stewart, & Leach, David. Leaf seal for inner and outer casings of a turbine. United States.
Schroder, Mark Stewart, and Leach, David. Tue .
"Leaf seal for inner and outer casings of a turbine". United States. https://www.osti.gov/servlets/purl/874643.
@article{osti_874643,
title = {Leaf seal for inner and outer casings of a turbine},
author = {Schroder, Mark Stewart and Leach, David},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 2002},
month = {Tue Jan 01 00:00:00 EST 2002}
}