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US 9,011,076 B2Granted
Counter-rotating low pressure turbine with gear system mounted to turbine exhaust case
AssigneeUnited Technologies Corporation
InventorsGabriel L. Suciu, Brian D. Merry
Life of this patent
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Abstract
A gas turbine engine includes a shaft defining an axis of rotation. An inner rotor directly drives the shaft and includes an inner set of blades. An outer rotor has an outer set of blades interspersed with the inner set of blades. The outer rotor is configured to rotate in an opposite direction about the axis of rotation from the inner rotor. A gear system couples the outer rotor to the shaft and is configured to rotate the inner set of blades at a lower speed than the outer set of blades.
Claims24
A gas turbine engine comprising:
- a shaft defining an axis of rotation;
- a turbine section comprising:
- an inner rotor directly driving the shaft, the inner rotor including an inner set of blades;
- and
- an outer rotor having an outer set of blades interspersed with the inner set of blades, the outer rotor configured to rotate in an opposite direction about the axis of rotation from the inner rotor;
- and
- a gear system coupling the outer rotor to the shaft and configured to rotate the inner set of blades at a lower speed than the outer set of blades.
4 more elements
A gas turbine engine comprising:
- a core air flowpath;
- a shaft supporting a compressor section and a turbine section arranged within the core flowpath;
- and
- wherein the turbine section includes a counter-rotating low pressure turbine comprising
- an inner rotor directly driving the shaft, the inner rotor including an inner set of blades,
- an outer rotor having an outer set of blades interspersed with the inner set of blades, the outer rotor configured to rotate in an opposite direction about the axis of rotation from the inner rotor, and
- a gear system coupling the outer rotor to the shaft and configured to rotate the inner set of blades at a lower speed than the outer set of blades.
4 more elements
Dependencies are inferred from the claim text.