Patent ID: 6546627
Filing Date: 2003-04-15
Classification: B23P,F01D,F05D,F23R,Y10T

Abstract:
A repair method for a gas turbine having a compressor for compressing air as a working fluid, a combustor for producing combustion gas by mixing fuel with the compressed air, and a turbine for generating rotational power at the time of expansion of the combustion gas, said method comprising:providing, on an outlet portion of a transition piece for transferring said working fluid to said turbine, a region parallel with the direction of rotating shaft of said turbine, cooling holes in said region so that the longitudinal intervals thereof are lengthened, and a picture frame portion to secure stiffness of an outlet of said outlet portion, and cutting said outlet portion at a portion where the longitudinal intervals of said cooling holes are lengthened to separate said picture frame portion from said transition piece, and welding another picture frame portion prepared in advance to the cut portion for replacement.