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Title: Turbine airfoil to shround attachment

Patent ·
OSTI ID:1130957
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A turbine airfoil (31) with an end portion (42) that tapers (44) toward the end (43) of the airfoil. A ridge (46) extends around the end portion. It has proximal (66) and distal (67) sides. A shroud platform (50) is bi-cast onto the end portion around the ridge without bonding. Cooling shrinks the platform into compression (62) on the end portion (42) of the airfoil. Gaps between the airfoil and platform are formed using a fugitive material (56) in the bi-casting stage. These gaps are designed in combination with the taper angle (44) to accommodate differential thermal expansion while maintaining a gas seal along the contact surfaces. The taper angle (44) may vary from lesser on the pressure side (36) to greater on the suction side (38) of the airfoil. A collar portion (52) of the platform provides sufficient contact area for connection stability.

Research Organization:
Siemens Energy, Inc., Orlando, FL (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
FC26-05NT42644
Assignee:
Siemens Energy, Inc. (Orlando, FL)
Patent Number(s):
8,714,920
Application Number:
12/752,460
OSTI ID:
1130957
Resource Relation:
Patent File Date: 2010 Apr 01
Country of Publication:
United States
Language:
English

References (28)

Method for improving metallurgical bond in bimetallic castings patent February 1977
Method of forming metal article having plurality of airfoils extending outwardly from a hub patent April 1980
Process for the production of gas turbine engine rotors and stators patent December 1984
Method of manufacturing a turbine rotor patent January 1985
Method of manufacturing an integral bladed turbine disk patent September 1985
Method for manufacturing a multiple property integral turbine wheel patent June 1986
Turbine engine component and method of making the same patent March 1988
Composite gas turbine blade and method of manufacturing same patent September 1989
Method of making a turbine engine component patent September 1990
Method of making an improved turbine engine component patent October 1990
Method of making a turbine engine component patent January 1991
Method of making a turbine engine component patent December 1991
Method of making a turbine engine component patent January 1993
Method of making a composite casting patent September 1993
Method of making a composite casting patent September 1993
Method of making a composite casting patent November 1993
Bicast vane and shroud rings patent March 1994
Composite casting method patent July 1994
Stator vane having reinforced braze joint patent July 1994
Process for obtaining bimaterial parts by casting an alloy around an insert coated with a metal film patent January 1995
Method of making composite castings using reinforcement insert cladding patent October 1997
Gas turbine engine vane and method of manufacture patent August 1998
Method of making composite castings using reinforcement insert cladding patent November 1999
Low stress connection methodology for thermally incompatible materials patent June 2002
Ceramic matrix composite turbine vane patent November 2003
Metal casting fabrication method patent May 2006
Method for manufacturing cast components patent October 2007
Bi-cast blade ring for multi-alloy turbine rotor patent-application October 2006

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