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Multiple piece turbine engine airfoil with a structural spar

United States Patent

October 11, 2011
View the Complete Patent at the US Patent & Trademark Office
U.S. Department of Energy - Visit the Office of the Assistant General Counsel for Technology Transfer & Intellectual Property Website
A multiple piece turbine airfoil having an outer shell with an airfoil tip that is attached to a root with an internal structural spar is disclosed. The root may be formed from first and second sections that include an internal cavity configured to receive and secure the one or more components forming the generally elongated airfoil. The internal structural spar may be attached to an airfoil tip and place the generally elongated airfoil in compression. The configuration enables each component to be formed from different materials to reduce the cost of the materials and to optimize the choice of material for each component.
Vance; Steven J. (Orlando, FL)
Siemens Energy, Inc. (Orlando, FL)
12/ 239,016
September 26, 2008
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH Development of this invention was supported in part by the United States Department of Energy, Contract No. DE-FC26-05NT42646. Accordingly, the United States Government may have certain rights in this invention.