Epicyclic gear system with superfinished journal bearing
US8172716B2 · kind B2 · utility
32Cited by
10References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 25, 2009 |
| Grant date | May 8, 2012 |
| Priority date | — |
| Expiry date | Sep 7, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T50/60
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An epicyclic gear assembly includes a ring gear, a sun gear, at least one star gear enmeshed between the ring gear and sun gear, a carrier and a journal bearing. The carrier is disposed adjacent the rotatable sun gear and star gear. The journal bearing is disposed in the at least one star gear and connected to the carrier. The journal bearing has an outer radial surface with an amorphous surface finish of less than about 5 micro inches (127 micro mm) measured on an Ra scale and the outer surface of the journal bearing interfaces with an inner surface of the star gear.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.