GAS TURBINE ENGINE COMBUSTOR WITH CMC HEAT SHIELD AND METHODS THEREFOR

摘要

A combustor for a gas turbine engine is disclosed. The combustor is described as comprising a dome plate coupled to a liner thereof, with at least one heat shield comprised of a ceramic matrix composite coupled at the aft end of the dome plate. Also described is a method for assembling a combustor for a gas turbine engine, including releasing a metal alloy heat shield from a dome plate and providing a ceramic matrix composite heat shield as replacement.

主权项

1. A method for assembling a gas turbine engine combustor, the combustor including a dome plate comprising a forward end and an aft end, and having at least one circumferential opening therethrough, the method comprising:
(a) providing a heat shield fabricated of a ceramic matrix composite and which includes a neck and an annular flange extending radially outward from the neck; (b) positioning an annular flange ring having threads on the outer diameter thereof over the neck of the heat shield, to provide a heat shield sub-assembly; (c) matingly engaging the heat shield sub-assembly into the at least one circumferential opening of the dome plate from the aft end of the dome plate, at least a portion of the neck passing through the opening to the forward end; (d) threadingly engaging an annular retainer nut having threads on the inner diameter thereof through the opening from the forward end to the flange ring, to facilitate secure coupling of the heat shield sub-assembly to the dome plate.