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US 7,021,042 B2Granted
Geartrain coupling for a turbofan engine
AssigneeUnited Technologies Corporation
InventorChi Law
Life of this patent
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Abstract
Molybdenum disulfide (MoS2) is used as a journal coating for a gearing system. A particular application is the planetary gear system of a geared turbofan engine. Particularly advantageous coatings are deposited via physical vapor deposition (PVD) techniques.
Claims16
A turbofan engine comprising:
- a turbine;
- a fan;
- and
- a geartrain coupling the turbine to the fan to permit the turbine to drive the fan with a reduction and including a plurality of gears of which at least a first gear is supported by a journal, the journal having a coating comprising MoS2.
1 more element
A turbofan engine comprising:
- a turbine;
- a fan;
- and
- a geartrain coupling the turbine to the fan to permit the turbine to drive the fan with a reduction and including a plurality of gears of which at least a first gear is supported by a journal, the journal having a coating consisting essentially of at least one of sputter-deposited MoS2 and fullerene-like MoS2.
1 more element
Dependencies are inferred from the claim text.