CPC F01D 15/12 (2013.01) [F01D 1/02 (2013.01); F01D 5/02 (2013.01); F01D 5/027 (2013.01); F01D 25/16 (2013.01); F01D 25/18 (2013.01); F02C 7/32 (2013.01); F16H 57/04 (2013.01); F02C 7/36 (2013.01); F02K 3/06 (2013.01); F05D 2220/32 (2013.01); F05D 2220/36 (2013.01); F05D 2240/70 (2013.01); F05D 2260/34 (2013.01); F05D 2260/40311 (2013.01); F16H 57/0423 (2013.01); F16H 57/0479 (2013.01); F16H 57/0486 (2013.01); F16H 2057/085 (2013.01)] | 31 Claims |
1. A gas turbine engine comprising:
a propulsor section including a propulsor supported on a propulsor shaft;
a turbine section including a turbine shaft, wherein the turbine section has a fan drive turbine including a pressure ratio of greater than 5;
a compressor section having compressor hubs with blades driven by the turbine shaft about an axis; and
an epicyclic gear train interconnecting the propulsor shaft and the turbine shaft, the epicyclic gear train comprising:
a sun gear coupled to the turbine shaft such that the sun gear is rotatable about the axis;
intermediary gears arranged circumferentially about and meshing with the sun gear;
a carrier supporting the intermediary gears, wherein each of the intermediate gears is supported on a respective journal bearing secured to the carrier, each journal bearing has an internal central cavity that extends between axial ends, and each journal bearing has at least one passage that extends radially from the internal central cavity to a peripheral journal surface of the respective journal bearing; and
a ring gear including first and second portions, the first and second portions each having an inner periphery with teeth intermeshing with the intermediate gears, the first and second portions having axially opposed faces abutting one another at a radial interface, the first and second portions including respective flanges extending along the radial interface radially outward from the teeth, and wherein the first and second portions having grooves at the radial interface that form a hole that expels oil through the ring gear.
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