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Pre-stressed/pre-compressed gas turbine nozzle

United States Patent

June 11, 2002
View the Complete Patent at the US Patent & Trademark Office
A method of increasing low cycle fatigue life of a turbine nozzle comprising a plurality of stationary airfoils extending between radially inner and outer ring segments comprising a) providing at least one radial passage in each of the plurality of airfoils; b) installing a rod in the radial passage extending between the radially inner and outer ring segments and fixing one end of the rod to one of the inner and outer rings; and c) pre-loading the rod to compress the airfoil between the inner and outer ring segments.
Jang; Hoyle (Schenectady, NY), Itzel; Gary Michael (Clifton Park, NY), Yu; Yufeng Phillip (Guilderland, NY)
General Electric Company (Schenectady, NY)
09/ 778,033
February 7, 2001
This invention was made with Government support under Contract No. DE-FC21-95MC31176 awarded by the Department of Energy. The Government has certain rights in this invention.