Oil baffle for gas turbine fan drive gear system
A turbine engine comprises compressor and turbine sections. An epicyclic gear train includes a carrier, a sun gear and intermediate gears arranged about and intermeshing with the sun gear. The intermediate gears are supported by the carrier. A baffle includes a lubrication passage near at least one of the sun gear and intermediate gears for directing a lubricant on at least one of the sun gear and intermediate gears. A method of designing a turbine engine is also disclosed.
1. A turbine engine comprising:
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 an axially oriented fastening member, the baffle including a lubrication passage near at least one of the sun gear and intermediate gears for directing a lubricant 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 fan, and the input shaft supports a compressor hub having compressor blades.
4. The turbine engine according to claim 2 , wherein there are three turbine rotors in the turbine section, with a fan drive turbine driving the fan through the input shaft, and two other turbine rotors driving compressor rotors.
5. The turbine engine according to claim 2 , wherein the carrier is fixed relative to a housing, the output shaft drives a compressor hub, and a fan at a common speed, and the input shaft is driven by a turbine rotor.
6. The turbine engine according to claim 5 , wherein there are two turbine rotors, with the first turbine rotor driving a second compressor hub, and a lower pressure turbine rotor driving the compressor hub and the fan through the input shaft.
7. The turbine engine according to claim 2 , wherein the carrier is fixed to a housing, and the output shaft drives a fan, with the input shaft rotating with a compressor hub.
8. 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.
9. The turbine engine according to claim 8 , comprising a housing supporting a torque frame that is secured to the mounts.
10. The turbine engine according to claim 8 , 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.
11. The turbine engine according to claim 10 , comprising a tube extending through a hole in one of the walls, the tube in communication with the primary passage.
12. The turbine engine according to claim 1 , wherein there are three turbine rotors in the turbine section, with a fan drive turbine driving a fan through the input shaft, and two other turbine rotors driving compressor rotors.
13. The turbine engine according to claim 1 , wherein the carrier is fixed relative to a housing, the output shaft drives a compressor hub and a fan at a common speed, and the input shaft is driven by a turbine rotor.
14. The turbine engine according to claim 2 , wherein the carrier is fixed to a housing, and the output shaft drives a fan, with the input shaft rotating with a compressor hub.
15. The turbine engine according to claim 14 , wherein there are two turbine rotors in the turbine section with a first turbine rotor driving a second compressor hub, and a lower pressure turbine rotor driving the compressor hub and the input shaft.
16. A turbine engine comprising:
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 an axially oriented fastening member, the baffle including a lubrication passage near at least one of the sun gear and intermediate gears for directing a lubricant 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 lubricant on the sun gear.
17. The turbine engine according to claim 16 , 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.
18. The turbine engine according to claim 17 , wherein the carrier is fixed relative to a housing, the output shaft drives a fan, and the input shaft supports a compressor hub having compressor blades.
19. The turbine engine according to claim 17 , wherein there are three turbine rotors in the turbine section, with a fan drive turbine driving a fan through the input shaft, and two other turbine rotors driving compressor rotors.
20. The turbine engine according to claim 17 , wherein the carrier is fixed relative to a housing, the output shaft drives a compressor hub, and a fan at a common speed, and the input shaft is driven by a turbine rotor.
21. The turbine engine according to claim 20 , wherein there are two turbine rotors, with the first turbine rotor driving a second compressor hub, and a lower pressure turbine rotor driving the compressor hub and the fan through the input shaft.
22. The turbine engine according to claim 16 , 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.
23. The turbine engine according to claim 22 , 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.
24. The turbine engine according to claim 19 , comprising a tube extending through a hole in one of the walls, the tube in communication with the primary passage.
25. The turbine engine according to claim 16 , wherein there are three turbine rotors in the turbine section, with a fan drive turbine driving a fan through the input shaft, and two other turbine rotors driving compressor rotors.
26. The turbine engine according to claim 16 , wherein the carrier is fixed relative to a housing, the output shaft drives a compressor hub, and a fan at a common speed, and the input shaft is driven by a turbine rotor.
27. The turbine engine according to claim 26 , wherein there are two turbine rotors, with the first turbine rotor driving a second compressor hub, and a lower pressure turbine rotor driving the compressor hub and the fan through the input shaft.
28. The turbine engine according to claim 16 , wherein the carrier is fixed to a housing, and the output shaft drives a fan, with the input shaft rotating with a compressor hub.
29. The turbine engine according to claim 28 , wherein there are two turbine rotors in the turbine section with a first turbine rotor driving a second compressor hub, and a lower pressure turbine rotor driving the compressor hub and the input shaft.
30. A method of designing a turbine engine comprising:
providing 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 an axially oriented fastening member, the baffle including a lubrication passage near at least one of the sun gear and intermediate gears for directing a lubricant on the at least one of the sun gear and intermediate gears; and
providing a compressor section and a turbine sections, the turbine section to drive the compressor section and the epicyclic gear train,
wherein there are three turbine rotors in the turbine section, with a fan drive turbine driving a fan through the input shaft, and two other turbine rotors driving compressor rotors.