Invention Grant
- Patent Title: Epicyclic gear train
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Application No.: US14824351Application Date: 2015-08-12
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Publication No.: US09976437B2Publication Date: 2018-05-22
- Inventor: Michael E. McCune , Lawrence E. Portlock , Frederick M. Schwarz
- Applicant: UNITED TECHNOLOGIES CORPORATION
- Applicant Address: US CT Farmington
- Assignee: United Technologies Corporation
- Current Assignee: United Technologies Corporation
- Current Assignee Address: US CT Farmington
- Agency: Carlson, Gaskey & Olds, P.C.
- Main IPC: F16H57/08
- IPC: F16H57/08 ; F01D15/12 ; F01D25/18 ; F01D25/16 ; F01D1/02 ; F01D5/02 ; F02C7/32 ; F16H57/04

Abstract:
A turbine engine has a fan shaft. At least one tapered bearing is mounted on the fan shaft. The fan shaft includes at least one passage extending in a direction having at least a radial component, and adjacent the at least one tapered bearing. A fan is mounted for rotation on the tapered bearing. An epicyclic gear train is coupled to drive the fan. The epicyclic gear train includes a carrier supporting intermediate gears that mesh with a sun gear. A ring gear surrounds and meshes with the intermediate gears. Each of the intermediate gears are supported on a respective journal bearing. The epicyclic gear train defines a gear reduction ratio of greater than or equal to about 2.3. A turbine section is coupled to drive the fan through the epicyclic gear train. The turbine section has a fan drive turbine that includes a pressure ratio that is greater than about 5. The fan includes a pressure ratio that is less than about 1.45, and the fan has a bypass ratio of greater than about ten (10).
Public/Granted literature
- US20150345321A1 EPICYCLIC GEAR TRAIN Public/Granted day:2015-12-03
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