GAS TURBINE ENGINE GEAR TRAIN

摘要

An epicyclic gear train 22 includes a carrier 26 that supports star gears 32 that mesh with a sun gear 30. A ring gear 38 surrounds and meshes with the star gears 32. The star gears are supported on respective journal bearings 34. Each of the journal bearings includes a peripheral journal surface 34a and each of the star gears 32 includes a radially inner journal surface 32a that is in contact with the peripheral journal surface of the respective journal bearing. The epicyclic gear train 22 has a gear reduction ratio of greater than or equal to about 2.3.