US 11,680,492 B2
Epicyclic gear train
Michael E. McCune, Colchester, CT (US); Lawrence E. Portlock, Bethany, CT (US); and Frederick M. Schwarz, Glastonbury, CT (US)
Assigned to RAYTHEON TECHNOLOGIES CORPORATION, Farmington, CT (US)
Filed by RAYTHEON TECHNOLOGIES CORPORATION, Farmington, CT (US)
Filed on Apr. 1, 2022, as Appl. No. 17/711,177.
Application 17/711,177 is a continuation of application No. 17/145,766, filed on Jan. 11, 2021, granted, now 11,319,831.
Application 17/145,766 is a continuation of application No. 16/805,917, filed on Mar. 2, 2020, granted, now 10,890,245, issued on Jan. 12, 2021.
Application 16/805,917 is a continuation of application No. 15/984,494, filed on May 21, 2018, granted, now 10,577,965, issued on Mar. 3, 2020.
Application 15/984,494 is a continuation of application No. 14/824,351, filed on Aug. 12, 2015, granted, now 9,976,437, issued on May 22, 2018.
Application 14/824,351 is a continuation in part of application No. 13/486,766, filed on Jun. 1, 2012, abandoned.
Application 13/486,766 is a continuation of application No. 13/340,735, filed on Dec. 30, 2011, granted, now 8,708,863, issued on Apr. 29, 2014.
Application 13/340,735 is a continuation in part of application No. 11/504,220, filed on Aug. 15, 2006, granted, now 8,753,243, issued on Jun. 17, 2014.
Prior Publication US 2022/0228506 A1, Jul. 21, 2022
Int. Cl. F16H 57/04 (2010.01); F01D 15/12 (2006.01); F01D 25/18 (2006.01); F01D 25/16 (2006.01); F01D 1/02 (2006.01); F01D 5/02 (2006.01); F02C 7/32 (2006.01); F16H 57/08 (2006.01); F02C 7/36 (2006.01); F02K 3/06 (2006.01)
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
OG exemplary drawing
 
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.