초록

A fuel nozzle for a gas turbine is arranged so that the air supply portion which surrounds the fuel supply portion is conveniently removable to permit cleaning but the two parts are resiliently related to permit differential expansion caused by the thermal differentials encountered during operation.

대표청구항 ▼

A fuel nozzle for a gas turbine comprising: (a) elongate, coaxial inner and outer tubes, the outer tube being telescoped over the inner tube to define an obstructed annular air flow passageway therebetween, the inner tube defining an unobstructed fuel flow passageway, each tube having distal and pro

A fuel nozzle for a gas turbine comprising: (a) elongate, coaxial inner and outer tubes, the outer tube being telescoped over the inner tube to define an obstructed annular air flow passageway therebetween, the inner tube defining an unobstructed fuel flow passageway, each tube having distal and proximal ends; (b) a body having air and fuel inlets communicating with the air flow and fuel flow passageways, respectively, the proximal end of each tube being within the body, the inner tube being rigidly fixed to the body, the outer tube being axially movable between the inner tube and the body; (c) a nozzle tip disposed on the distal end of the inner tube and having a frustoconical outer surface and a central orifice communicating with the fuel passageway for ejection of fuel, and a swirl cap with a conical aperture disposed on the distal end of the outer tube in coaxial alignment with the orifice of the nozzle tip, the swirl cap including a plurality of air passages communicating with the air passageway for directing air into a stream of ejected fuel; and, (d) spring means disposed in a cavity of the body for urging the outer tube in the direction of the body and biasing sides of the conical aperture in the swirl cap into airtight contact with the outer surface of the nozzle tip while permitting differential expansion between the outer and inner tubes, the spring means being located radially outward of the outer tube and out of the air flow and fuel flow fuel passages.