Device for changing the transmission ratio between a turbine shaft and a shaft of a starter-generator of an aeroengine
US8757018B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 16, 2010 |
| Grant date | Jun 24, 2014 |
| Priority date | — |
| Expiry date | Jul 3, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19307
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A device for changing a transmission ratio between a turbine shaft and a shaft of a starter-generator of an aeroengine, the device including: first and second fixed gear wheels carried by the shaft of the starter-generator; first and second idler gearwheels carried by the turbine shaft, and meshing respectively with the first and second fixed gearwheels to define different gear ratios; a changeover sleeve interposed between the idler gearwheels and mechanically coupled to the turbine shaft, the changeover sleeve being movable in translation on the turbine shaft between two coupling positions; and a mechanism causing the changeover sleeve to move in translation automatically from either one of its coupling positions to the other one when the sum of torques between the turbine shaft and the starter-generator shaft changes sign.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.