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US 12,385,409 B2Granted
Epicyclic gear train
AssigneeRtx Corporation
InventorsMichael E. McCune, Lawrence E. Portlock, Frederick M. Schwarz
Life of this patent
Estimating the term…
Abstract
A gas turbine engine according to an example of the present disclosure includes a propulsor section including a propulsor supported on a propulsor shaft, a turbine section including a turbine shaft, a compressor section having a plurality of compressor hubs with blades driven by the turbine shaft about an engine axis, and an epicyclic gear train interconnecting the propulsor shaft and the turbine shaft. The epicyclic gear train includes a sun gear coupled to the turbine shaft, intermediary gears arranged circumferentially about and meshing with the sun gear, a carrier and a ring gear including first and second portions. The first and second portions have axially opposed faces abutting one another at a radial interface.
Claims20
A gas turbine engine comprising:
- a propulsor section including a propulsor supported on a propulsor shaft;
- a turbine section including a turbine shaft;
- a compressor section having a plurality of compressor hubs with blades driven by the turbine shaft about an engine 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;
- intermediary gears arranged circumferentially about and meshing with the sun gear;
- a carrier and support means for supporting each of the intermediate gears relative to the carrier;
- 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 ring gear including discharge means for expelling lubricant from the radial interface outwardly of the ring gear, and the discharge means including facing recesses of the first and second portions that form an internal annular cavity along the radial interface;
- wherein the first and second portions including respective flanges extending along the radial interface radially outward from the teeth, the epicyclic gear train defines a gear reduction ratio of greater than or equal to 2.5, and the ring gear includes engagement means for forcing the first portion and the second portion toward one another at the radial interface.
8 more elements
A gas turbine engine comprising:
- a propulsor section including a propulsor supported on a propulsor shaft;
- a turbine section including a turbine shaft;
- a compressor section having a plurality of compressor hubs with blades driven by the turbine shaft about an engine 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;
- intermediary gears arranged circumferentially about and meshing with the sun gear;
- a carrier and support means for supporting each of the intermediate gears relative to the carrier;
- 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 ring gear including discharge means for expelling lubricant from the radial interface outwardly of the ring gear, and the discharge means including facing recesses of the first and second portions that form an internal annular cavity along the radial interface;
- wherein the propulsor is a turbo fan, and the propulsor shaft is a fan shaft supporting the fan.
8 more elements
A gas turbine engine comprising:
- a propulsor section including a propulsor supported on a propulsor shaft;
- a turbine section including a turbine shaft;
- a compressor section having a plurality of compressor hubs with blades driven by the turbine shaft about an engine 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;
- intermediary gears arranged circumferentially about and meshing with the sun gear;
- a carrier and support means for supporting each of the intermediate gears relative to the carrier;
- 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 ring gear including discharge means for expelling lubricant from the radial interface outwardly of the ring gear, and the discharge means including facing recesses of the first and second portions that form an internal annular cavity along the radial interface;
- and
- sealing means along an outer periphery of the respective first and second portions.
8 more elements
Dependencies are inferred from the claim text.