A turbofan engine includes a fan rotatable about an axis, a compressor section, a combustor in fluid communication with the compressor section, a turbine section in fluid communication with the combustor, and a fan drive gear system including a carrier for supporting a plurality of gears. A torque f
A turbofan engine includes a fan rotatable about an axis, a compressor section, a combustor in fluid communication with the compressor section, a turbine section in fluid communication with the combustor, and a fan drive gear system including a carrier for supporting a plurality of gears. A torque frame is attached to the carrier. A plurality of connectors extends between the carrier and torque frame for securing the torque frame to the carrier. A scupper captures lubricant during gear operation and directing lubricant into a space between at least one of the plurality of connectors and at least one of the torque frame and the carrier.
대표청구항▼
1. A turbofan engine comprising: a fan rotatable about an axis;a compressor section;a combustor in fluid communication with the compressor section;a turbine section in fluid communication with the combustor; anda fan drive gear system including a carrier for supporting a plurality of gears, a torque
1. A turbofan engine comprising: a fan rotatable about an axis;a compressor section;a combustor in fluid communication with the compressor section;a turbine section in fluid communication with the combustor; anda fan drive gear system including a carrier for supporting a plurality of gears, a torque frame attached to the carrier, a plurality of connectors extending between the carrier and torque frame for securing the torque frame to the carrier, and a scupper for capturing lubricant during gear operation and directing lubricant into a space between at least one of the plurality of connectors and at least one of the torque frame and the carrier. 2. The turbofan engine as recited in claim 1, wherein the fan drive gear system includes a sun gear driving a plurality of intermediate gears supported by the carrier and ring gear circumscribing the plurality intermediate gears, wherein the ring gear is fixed relative to rotation of the carrier and torque frame about an axis of rotation. 3. The turbofan engine as recited in claim 2, wherein the carrier and torque frame are configured to rotate about an axis of rotation and generate centrifugal forces for driving exhaust lubricant through the space between each of the plurality of connectors and one of the carrier and torque frame. 4. The turbofan engine as recited in claim 3, wherein the scupper is a portion of the torque frame. 5. The turbofan engine as recited in claim 3, wherein the scupper is a portion of the carrier. 6. The turbofan engine as recited in claim 3, wherein the scupper comprises a scoop that directs lubricant into the space. 7. The turbofan engine as recited in claim 3, wherein the fan drive gear system provides a speed reduction between the turbine section and the fan section of greater than about 2.3. 8. The turbofan engine as recited in claim 7, wherein the turbofan engine is a high bypass geared aircraft engine having a bypass ratio of greater than about ten (10). 9. The turbofan engine as recited in claim 8, wherein the turbofan engine includes a Fan Pressure Ratio of less than about 1.45. 10. The turbofan engine as recited in claim 9, wherein the turbine section includes a fan drive turbine coupled to drive the fan through the fan drive gear system and a second turbine forward of the fan drive turbine and a ratio of a number of fan blades in the fan and a number of rotors in the fan drive turbine is between about 3.3 and about 8.6. 11. A fan drive gear system comprising: a carrier for supporting a plurality of gears;a torque frame attached to the carrier;a plurality of connectors extending between the carrier and torque frame for securing the torque frame to the carrier; anda scupper for capturing lubricant during gear operation and directing lubricant into a space between the plurality of connectors and at least one of the torque frame and the carrier. 12. The fan drive gear system as recited in claim 11, wherein the scupper is a portion of the torque frame. 13. The fan drive gear system as recited in claim 12, wherein the plurality of connectors are each press fit at each distal end into the carrier and the space is defined between each connector and the torque frame. 14. The fan drive gear system as recited in claim 13, wherein the carrier includes at least one opening for communicating lubricant to the scupper. 15. The fan drive gear system as recited in claim 14, wherein the scupper is a portion of the carrier. 16. The fan drive gear system as recited in claim 15, wherein the plurality of connectors are press fit at each distal end into the torque frame and the space is defined between each connector and the carrier. 17. The fan drive gear system as recited in claim 11, wherein the scupper comprises a scoop that directs lubricant into the space. 18. The fan drive gear system as recited in claim 11, including a sun gear driving a plurality of intermediate gears supported by the carrier and a ring gear circumscribing the plurality intermediate gears, wherein the ring gear is fixed relative to rotation of the carrier and torque frame about an axis of rotation. 19. The fan drive gear system as recited in claim 11, wherein the carrier and torque frame are configured to rotate about an axis of rotation and generate centrifugal forces for driving exhaust lubricant through the space between each of the plurality of connectors and one of the carrier and torque frame. 20. A method of designing a fan drive gear system for a turbofan engine, the method comprising: configuring a torque frame for attachment to a carrier by way of a plurality of connectors;configuring a lubricant flow path such that rotation of the carrier and torque frame generate centrifugal forces in exhaust lubricant;configuring at least one of the carrier and the torque frame with scuppers for capturing at least a portion of lubricant exhausted from a plurality of gears; andconfiguring the scuppers to direct the captured lubricant into a space between the plurality of connectors and one of the torque frame and carrier. 21. The method as recited in claim 20, wherein the scuppers are defined on the torque frame and the press fit is between each of the plurality of connectors and the carrier. 22. The method as recited in claim 20, wherein the scuppers are defined on the carrier and the press fit is between each of the plurality of connectors and the torque frame. 23. The method as recited in claim 20, including defining an outlet from the space between the plurality of connectors for exhausting lubricant from the space. 24. The method as recited in claim 20, configuring a sun gear to drive the plurality of gears supported by the carrier and configuring a ring gear to circumscribe the plurality of gears such that the ring gear is fixed relative to rotation of the carrier and torque frame about an axis of rotation. 25. The method as recited in claim 24, including configuring the fan drive gear system to provide a speed reduction ratio greater than about 2.3:1.
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이 특허에 인용된 특허 (13)
Sheridan, William G., Auxiliary pump system for fan drive gear system.
Turra Sergio (Turin ITX) Bologna Valter (Grugliasco ITX), Epicyclic speed reducer designed for fitment to the transmission between the gas turbine and air compressor of an aircra.
Becquerelle,Samuel; Ville,Daniel; Libolt,Jo챘l; Moog,Olivier; Pettinotti,Serge; Peiron,Benjamin, Flexible connection system between a planet carrier and the stationary support in a speed reduction gear train.
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