End cover configuration and assembly

摘要

A system includes an end cover for a multi-tube fuel nozzle. The end cover includes a first side, a second side disposed opposite the first side, a plurality of fuel injectors disposed on the first side, and at least one pre-orifice disposed within a passage within the end cover between the first and second sides. The pre-orifice is configured to be removed through the end cover from the second side.

主权项

1. A system comprising:
an end cover of a multi-tube fuel nozzle, wherein the end cover comprises:
a first side;a second side disposed opposite the first side;a plurality of fuel injectors disposed on the first side;a pre-orifice cavity extending through the end cover from the first side to the second side; andat least one pre-orifice conduit disposed within the pre-orifice cavity, wherein the at least one pre-orifice conduit comprises:
a longitudinal wall having a first end portion and a second end portion, the first end portion disposed to the second side within the end cover and the second end portion extends through and beyond the first side,a plurality of apertures disposed on the longitudinal wall of the at least one pre-orifice conduit on the second end portion to deliver fuel to a fuel plenum, and
wherein the at least one pre-orifice conduit is configured to be removed through the end cover from the second side.