Patent ID: 9321115
Filing Date: 2016-04-26
CPC Classification: B23K,B23P,F01D,F05D,F23R

Claim Text:
1. A method of repairing side seal regions of transition duct aft frames of a gas turbine, the method comprising: providing a pair of side seal regions coupled to adjacent transition duct aft frames, each of the pair of side seal regions having a plurality of seal teeth, the pair of side seal regions positioned such that the plurality of seal teeth of each side seal region of the pair of side seal regions form an interlocking labyrinth seal that permits fluid communication between the pair of side seal regions; determining one or more seal teeth of the pair of side seal regions are out of compliance with an acceptable dimensional standard due to undesired contact between the pair of side seal regions during operation of the gas turbine, such that the fluid communication through the interlocking labyrinth seal is increased; determining an amount of wear to the one or more seal teeth; applying a braze filler material to the one or more seal teeth; and adhering the braze filler material to the one or more seal teeth through a braze cycle to at least partially restore the acceptable dimensional standard of the one or more seal teeth, wherein the braze cycle heats the transition duct aft frames incrementally to a peak temperature value where the braze cycle bonds the braze filler material to the one or more seal teeth while simultaneously solutioning the transition duct.