BRAZELESS END COVER FOR A COMBUSTION SYSTEM

摘要

Aspects of the present invention relate to systems and method for fabricating a combustor end cover where the cover does not include braze joints within the cover. The combustor cover provides a configuration and method of manufacturing where all fuel and air annuli can be placed within the cover without requiring use of brazed inserts, which were previously known to crack and leak.

主权项

1. A cover for a gas turbine combustor comprising:
a forward face; an opposing aft face spaced a distance from the forward face, thereby establishing a cover thickness; a central passageway extending through the cover along a central axis, the central passageway supplying a gaseous fuel to a first fuel nozzle; a plurality of fuel and air circuits positioned within the end cover and arranged in an annular array about the cover, the fuel and air circuits comprising:
a first portion located radially outward of the central passageway and each having:
a first core passage extending along a first circuit centerline;a first gas fuel supply annulus positioned adjacent the aft face of the cover;wherein the first gas fuel supply annulus provides gas fuel to a first plurality of fuel nozzles coupled to the forward face of the cover through angled feed holes;a second portion located radially outward of the central passageway and each having:
a second core passage extending along a second circuit centerline;a second gas fuel supply annulus positioned adjacent a radially outer edge of the cover and the forward face of the cover;wherein the second gas fuel supply annulus provides gas fuel to a second plurality of fuel nozzles coupled to the forward face of the cover through feed holes; and, a cooling air supply annulus positioned radially outward of the first gas fuel supply annulus and in fluid communication with the first portion and the second portion; wherein the cooling air supply annulus and the first fuel supply annulus are machined in the opposing aft face of the cover.