Invention Application
- Patent Title: EPICYCLIC GEAR TRAIN
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Application No.: US16805917Application Date: 2020-03-02
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Publication No.: US20200347744A1Publication Date: 2020-11-05
- Inventor: Michael E. McCune , Lawrence E. Portlock , Frederick M. Schwarz
- Applicant: United Technologies Corporation
- Main IPC: F01D15/12
- IPC: F01D15/12 ; F01D25/18 ; F01D25/16 ; F01D1/02 ; F01D5/02 ; F02C7/32

Abstract:
A turbine engine according to an example of the present disclosure includes, among other things, a fan shaft, at least one tapered bearing mounted on the fan shaft, the fan shaft including at least one passage extending in a direction having at least a radial component, and adjacent the at least one tapered bearing, a fan mounted for rotation on the at least one tapered bearing. An epicyclic gear train is coupled to drive the fan, the epicyclic gear train including a carrier supporting intermediate gears that mesh with a sun gear, and a ring gear surrounding and meshing with the intermediate gears, wherein the epicyclic gear train defines a gear reduction ratio of greater than or equal to 2.3. A turbine section is coupled to drive the fan through the epicyclic gear train, the turbine section having a fan drive turbine that includes a pressure ratio that is greater than 5. The fan includes a pressure ratio that is less than 1.45, and the fan has a bypass ratio of greater than ten (10).
Public/Granted literature
- US10890245B2 Epicyclic gear train Public/Granted day:2021-01-12
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