Lubrication of windmilling journal bearings
US7662059B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 18, 2006 |
| Grant date | Feb 16, 2010 |
| Priority date | — |
| Expiry date | Jan 5, 2028 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H57/0479
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A support shaft provides lubrication to a journal bearing during windmilling operation of a gear set. A primary oil pump provides oil from an oil supply during driven operation of the fan, and a secondary oil pump provides oil from an internal sump during windmilling operation of the fan. During driven operation of the fan, oil is pumped with the primary oil pump through a primary oil flow path to an outer surface of the support shaft. During windmilling fan operation, oil is pumped from an internal sump with a secondary oil pump through the secondary oil flow path. The secondary oil flow path has a smaller flow capacity, and the secondary oil pump is a smaller capacity pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.