Gas turbine engine lubrication
US8939864B2 · kind B2 · utility
14Cited by
23References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 30, 2011 |
| Grant date | Jan 27, 2015 |
| Priority date | — |
| Expiry date | Mar 25, 2032 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2057/085
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A turbine engine includes a fan shaft and at least one tapered bearing mounted on the fan shaft. The fan shaft includes at least one radially extending passage 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 that supports star gears that mesh with a sun gear, and a ring gear that surrounds and meshes with the star gears. Each of the star gears is supported on a respective journal bearing. The epicyclic gear train defines a gear reduction ratio of greater than or equal to about 2.3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.