GAS TURBINE ENGINE COMBUSTOR TOP HAT COVER ATTACHMENT SYSTEM WITH LUGGED INTERLOCKING BACKING PLATE

摘要

Combustor top hat covers are attached to midframe combustor portals with a lugged backing plate that interlocks with mating recesses formed in the corresponding midframe combustor portal. Exemplary embodiments utilize twist lock engagement of backing plate ring lugs under projecting tabs formed over a lug raceway recess in the combustor portal mating surface. The top hat cover is in turn fastened to the combustor portal by fasteners that engage corresponding threaded apertures formed in the backing plate.

主权项

1. A backing plate for affixing a combustor top hat cover to a midframe combustor portal of a gas turbine engine, comprising a ring, including a plurality of projecting ring lugs, that is adapted for locking mating insertion into corresponding recesses formed within a gas turbine engine midframe combustor portal, and defining an array pattern of threaded holes that correspond to an array pattern of top hat cover fastener apertures, which are adapted for capture of top hat cover fasteners.