Patent ID: 7484928
Filing Date: 2009-02-03
Classification: B23K,B23P,F01D,F05D,Y02T,Y10T

Abstract:
1. A repaired turbine nozzle comprising: leading edge and intermediate airfoil sections and inner and outer platforms forming remaining portions of a nozzle segment having a removed damaged trailing edge section; a trailing edge coupon having a trailing edge, pressure and suction side wall portions, a plurality of film cooling holes generally radially spaced one from the other along the pressure side wall portion of the coupon, a plurality of radially spaced cooling air exit openings along the trailing edge in communication with an internal, radially extending plenum, and a plurality of radially spaced ribs extending between opposite pressure and suction sides of the airfoil defining a plurality of cooling channels such that cooling air flowing through the channels flows into said plenum and exits through said cooling air exit openings; and welds along opposite pressure and suction side edges of the remaining section and respective pressure and suction side edges of the trailing edge coupon whereby the remaining section and the coupon form a complete airfoil between the inner and outer platforms.