TH34170B - Method for repairing the liner of the combustion chamber - Google Patents

Abstract

DC60 (10/07/44) Method of repairing the vaporized annular liner (12,14) for the combustion chamber (10) of a gas turbine. The annular section (34) of the liner (12,14), including the damaged area, was removed from between the proximal (30) and distal (32) sections of the liner (12,14). Sheet metal was formed into an annular replacement (40) with at least one axial seam (42) extending between the proximal (44) and distal (46) ends of the replacement (40). The replacement (40) was made to the same dimensions and shape as the removed annular section (34) of the liner (12,14). The proximal (44) end of the removed annular section The formed annular section was connected to the proximal end (30) of the liner (12,14), and the distal end (46) of the formed annular section was connected to the distal end (32) of the liner (12,14). Vapor-cooled annular liner (12,14) for the combustion chamber (10) of the gas turbine was removed. The annular section (34) of the liner (12,14), including the damaged area, was removed from between the proximal end (30) and the distal end (32) of the liner (12,14). A sheet of metal was formed into an annular replacement section (40) with at least one axial seam (42) extending between the proximal end (44) and the distal end (46) of the replacement section (40). The replacement section (40) was made to the same dimensions and shape as the original section. The detached ring section (34) of the liner (12,14) has its origin end (44) connected to the origin section (30) of the liner (12,14), and its distal end (46) of the formed ring section is connected to the distal section (32) of the liner (12,14).

Claims (8)

1. The repair procedure for a damaged annular vaporized liner of a gas turbine combustion chamber involves the following steps: removing the annular portion of the liner, including the damaged area between the inlet and outlet ends; forming a sheet metal annular replacement with at least one axial seam extending between the inlet end of the replacement and the outlet end opposite the inlet end; and making the replacement the same size and shape as the removed annular portion of the liner. The inlet end of the formed annular replacement is then connected to the inlet end of the liner, and the outlet end of the formed annular replacement is connected to the outlet end of the liner. 2. The method specified in Claim 1, where the seam is formed by electron beam welding. 3. The method specified in Claim 1, in which the formed ring segment is connected to the originating and terminating segments by electron beam bonding. 4. The method specified in Claim 1, whereby the replacement part is permanently deformed to the final shape after being connected to the origin and destination ends of the liner. 5. The method specified in Claim 1, where the liner is heated after the replacement part is connected to the origin and destination ends of the liner. 6. The method specified in Claim 1, where the cooling holes are machined in the liner after the replacement part is connected to the origin and destination ends of the liner. 7. The method specified in claim 6, where the cooling holes are machined in the liner at a different location than the cooling holes in the removed annular section. 8. The method specified in claim 6, where the cooling holes are machined in the liner to a different size than the cooling holes in the removed annular section.