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US 10,107,135 B2Granted
Gas turbine engine with gearbox health features
AssigneeUnited Technologies Corporation
InventorsFrederick M. Schwarz, William G. Sheridan
Life of this patent
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Abstract
A gas turbine engine according to an exemplary aspect of the present disclosure includes, among other things, a fan and a braking system. The braking system is configured to selectively engage the fan during ground windmilling to apply a first level of braking to slow rotation of the fan. Further, when the rotation of the fan sufficiently slows, the braking system is further configured to apply a second level of braking more restrictive than the first level of braking.
Claims5
A gas turbine engine, comprising:
- a fan;
- and
- a braking system configured to selectively engage the fan during ground windmilling to apply a first level of braking to slow rotation of the fan and, when the rotation of the fan slows, apply a second level of braking more restrictive than the first level of braking;
- wherein the braking system includes a brake, and wherein the fan includes a disc, the brake configured to selectively engage the disc to apply the first level of braking to slow rotation of the fan, and
- wherein the braking system further includes a pawl, and wherein the disc includes a slot, the pawl configured to selectively engage the slot to apply the second level of braking and to substantially lock the fan against rotation.
2 more elements
Dependencies are inferred from the claim text.