Geared turbofan with independent flexible ring gears and oil collectors
First Claim
1. A geared turbofan engine comprising:
- a fan rotatable about an engine axis;
a compressor section compressing air and delivering the compressed air to a combustor where the compressed air is mixed with fuel and ignited to drive a turbine section that in turn drives the fan and the compressor section;
a gear system driven by the turbine section for driving the fan at a speed different than the turbine section, the gear system including;
a carrier attached to a fan shaft;
a plurality of planet gears supported within the carrier, wherein each of the plurality of planet gears includes a first row of gear teeth and a second row of gear teeth supported within the carrier;
a sun gear driven by the turbine section, the sun gear in driving engagement with the plurality of planet gears; and
at least two separate ring gears circumscribing the plurality of planet gears, wherein each of the at least two separate ring gears are supported by a separate flexible ring gear mount from a plurality of flexible ring gear mounts each separately attached to an engine static structure that enables movement of the at least two separate ring gears relative to the engine static structure, and wherein one of the plurality of flexible ring gear mounts includes a first axially curved section with respect to the engine axis that extends forward of the at least two separate ring gears with respect to the engine axis and another of the plurality of flexible ring gear mounts includes a second axially curved section with respect to the engine axis that extends aft of the at least two separate ring gears with respect to the engine axis and each of the plurality of flexible ring gear mounts include an opening in communication with a gutter that directs captured oil to an oil collection system.
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Accused Products
Abstract
A geared turbofan engine includes a fan rotatable about an engine axis. A compressor section compresses air and delivers the compressed air to a combustor where the compressed air is mixed with fuel and ignited to drive a turbine section that in turn drives the fan and the compressor section. A gear system is driven by the turbine section for driving the fan at a speed different than the turbine section. The gear system includes a carrier attached to a fan shaft. A plurality of planet gears are supported within the carrier. Each of the plurality of planet gears includes a first row of gear teeth and a second row of gear teeth supported within the carrier. A sun gear is driven by a turbine section. The sun gear is in driving engagement with the plurality of planet gears. At least two separate ring gears circumscribe the plurality of planet gears. Each of the at least two ring gears are supported by a respective flexible ring gear mount that enables movement relative to an engine static structure. A fan drive gear system for a gas turbine engine is also disclosed.
66 Citations
14 Claims
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1. A geared turbofan engine comprising:
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a fan rotatable about an engine axis; a compressor section compressing air and delivering the compressed air to a combustor where the compressed air is mixed with fuel and ignited to drive a turbine section that in turn drives the fan and the compressor section; a gear system driven by the turbine section for driving the fan at a speed different than the turbine section, the gear system including; a carrier attached to a fan shaft; a plurality of planet gears supported within the carrier, wherein each of the plurality of planet gears includes a first row of gear teeth and a second row of gear teeth supported within the carrier; a sun gear driven by the turbine section, the sun gear in driving engagement with the plurality of planet gears; and at least two separate ring gears circumscribing the plurality of planet gears, wherein each of the at least two separate ring gears are supported by a separate flexible ring gear mount from a plurality of flexible ring gear mounts each separately attached to an engine static structure that enables movement of the at least two separate ring gears relative to the engine static structure, and wherein one of the plurality of flexible ring gear mounts includes a first axially curved section with respect to the engine axis that extends forward of the at least two separate ring gears with respect to the engine axis and another of the plurality of flexible ring gear mounts includes a second axially curved section with respect to the engine axis that extends aft of the at least two separate ring gears with respect to the engine axis and each of the plurality of flexible ring gear mounts include an opening in communication with a gutter that directs captured oil to an oil collection system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A fan drive gear system for a gas turbine engine, the fan drive gear system comprising:
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a carrier supporting a plurality of planet gears, wherein each of the plurality of planet gears includes a first row of gear teeth and a second row of gear teeth supported within the carrier; a sun gear driven by a turbine section, the sun gear in driving engagement with the plurality of planet gears; and at least two independent sets of ring gear teeth circumscribing the plurality of planet gears, each of the at least two independent sets of ring gear teeth are engaged with a corresponding one of the first row of gear teeth and the second row of gear teeth, wherein each of the at least two independent sets of ring gear teeth are supported by a respective flexible ring gear mount from a plurality of flexible ring gear mounts, that enables movement relative to an engine static structure, wherein one of the plurality of flexible ring gear mounts includes a first axially curved portion with respect to an engine centerline forward of the at least two independent sets of ring gear teeth with respect to the engine centerline, and another of the plurality of flexible ring gear mounts includes a second axially curved portion with respect to the engine centerline aft of the at least two independent sets of ring gear teeth with respect to the engine centerline, and each of the plurality of flexible ring gear mounts include an opening in communication with a gutter that directs captured oil to an oil collection system. - View Dependent Claims (11, 12, 13, 14)
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Specification