US 12,083,640 B1
Methods of repairing tubes in bundled tube fuel injectors
Tiffany M. Craig, Simpsonville, SC (US); and Ethan Conrad Schaeffer, Greenville, SC (US)
Assigned to GE INFRASTRUCTURE TECHNOLOGY LLC, Greenville, SC (US)
Filed by GE Infrastructure Technology LLC, Greenville, SC (US)
Filed on Aug. 9, 2023, as Appl. No. 18/446,631.
Int. Cl. B23P 6/00 (2006.01); F23R 3/28 (2006.01)
CPC B23P 6/005 (2013.01) [B23P 2700/13 (2013.01); F23R 3/28 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of repairing a fuel injector including a plurality of pre-mix tubes that each extend from a fuel plenum to an outlet portion, the method comprising:
removing the outlet portion from at least one pre-mix tube to define an exposed end portion;
machining an inner surface of the at least one pre-mix tube at the exposed end portion to form an increased inner diameter relative to an inner diameter of the pre-mix tube upstream from the exposed end portion; and
coupling a tube tip to the exposed end portion, wherein coupling the tube tip to the exposed end portion creates a junction between the tube tip and the exposed end portion, and wherein an inner diameter of the tube tip increases adjacent the junction to an increased inner diameter at the junction.