Oil baffle for gas turbine fan drive gear system
A gas turbine engine includes an epicyclic gear train that drives a turbo fan. The epicyclic gear train employs a one-piece carrier in which the spaced side walls are interconnected with circumferentially spaced apart mounts to form a unitary structure. Baffles are secured to the carrier near the mounts and provide lubrication passages that spray oil onto the sun gear and/or intermediate gears arranged between the baffles. The baffles can be constructed from a different material than the carrier since the baffles are not structural components in the gear train.
1. A turbine engine comprising:
a housing supporting compressor and turbine sections; and
an epicyclic gear train including:
a carrier;
a sun gear and intermediate gears arranged about and intermeshing with the sun gear, the intermediate gears supported by the carrier; and
a baffle secured to the carrier by a fastening member, the baffle including a lubrication passage near at least one of the sun gear and intermediate gears for directing a lubrication on the at least one of the sun gear and intermediate gears.
2. The turbine engine according to claim 1 , comprising a ring gear intermeshing with the intermediate gears and an output shaft interconnected to the ring gear, and an input shaft interconnected to the sun gear.
3. The turbine engine according to claim 2 , wherein the carrier is fixed relative to a housing, the output shaft drives a turbo fan, and the input shaft supports a compressor hub having compressor blades.
4. The turbine engine according to claim 1 , wherein the carrier includes spaced apart walls with circumferentially spaced mounts interconnecting the walls, the mounts providing circumferentially spaced apart apertures between the mounts at an outer circumference of the carrier, the intermediate gears extending through the apertures to intermesh with a ring gear.
5. The turbine engine according to claim 4 , comprising a housing supporting a torque frame that is secured to the mounts.
6. The turbine engine according to claim 4 , wherein the lubrication passage includes a primary passage extending laterally between the walls and first and second passages in communication with the primary passage and respectively terminating near the sun gear and intermediate gears.
7. The turbine engine according to claim 6 , comprising a tube extending through a hole in one of the walls, the tube in communication with the primary passage.
8. A turbine engine comprising:
a housing supporting compressor and turbine sections; and
an epicyclic gear train including:
a carrier;
a sun gear and intermediate gears arranged about and intermeshing with the sun gear, the intermediate gears supported by the carrier;
a baffle secured to the carrier by a fastening member, the baffle including a lubrication passage near at least one of the sun gear and intermediate gears for directing a lubrication on the at least one of the sun gear and intermediate gears; and
a spray bar external to the carrier and in communication with the lubrication passage, the spray bar terminating near the sun gear for directing lubrication on the sun gear.