Rotary kinetic fluid motors or pumps – Bearing – seal – or liner between runner portion and static part
Reexamination Certificate
2007-05-07
2010-10-26
Kershteyn, Igor (Department: 3745)
Rotary kinetic fluid motors or pumps
Bearing, seal, or liner between runner portion and static part
C415S173100, C415S173400, C415S173600, C415S174400, C415S200000
Reexamination Certificate
active
07819625
ABSTRACT:
A pattern of depressions (36) in a sealing surface (34) on a CMC wall (32) of gas turbine ring segment (30) allows minimum clearance against turbine blades tips, and thus maximizes working gas sealing. An array of depressions (36) on the surface (34) increases abradability of the surface (34) by blade tip contact during zero clearance conditions and reduces blade tip damage. The depressions (36) are unconnected, preventing bypass of the working gas around the blade tips. A desired abradable surface geometry may be formed in a stacked laminate wall construction (40-43, 52) by staggered laminate edge profiles (50, 52) or by machining of depressions (36, 54) after construction.
REFERENCES:
patent: 4329308 (1982-05-01), Langer et al.
patent: 4639388 (1987-01-01), Ainsworth et al.
patent: 4764089 (1988-08-01), Strangman
patent: 4884820 (1989-12-01), Jackson et al.
patent: 5064727 (1991-11-01), Naik et al.
patent: 5951892 (1999-09-01), Wolfla et al.
patent: 6013592 (2000-01-01), Merrill et al.
patent: 6197424 (2001-03-01), Morrison et al.
patent: 6203021 (2001-03-01), Wolfla et al.
patent: 6235370 (2001-05-01), Merrill et al.
patent: 6589600 (2003-07-01), Hasz et al.
patent: 6641907 (2003-11-01), Merrill et al.
patent: 6660405 (2003-12-01), Lau et al.
patent: 6670046 (2003-12-01), Xia
patent: 6706319 (2004-03-01), Seth et al.
patent: 6830428 (2004-12-01), Le Biez
patent: 6846574 (2005-01-01), Subramanian et al.
patent: 6946208 (2005-09-01), Subramanian et al.
patent: 2006/0120874 (2006-06-01), Burke et al.
patent: 2006/0121265 (2006-06-01), Thompson
patent: 2006/0121296 (2006-06-01), Morrison et al.
Merrill Gary B.
Vance Steven J.
Kershteyn Igor
Siemens Energy Inc.
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