Counter-rotating low pressure turbine with gear system mounted to turbine exhaust case
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United States of America Patent
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Apr 21, 2015
Grant Date -
Aug 29, 2013
app pub date -
Feb 29, 2012
filing date -
Feb 29, 2012
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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.
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