System of contra-rotating propellers driven by a planetary gear train providing a balanced distribution of torque between the two propellers
US8876462B2 · kind B2 · utility
23Cited by
10References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 17, 2009 |
| Grant date | Nov 4, 2014 |
| Priority date | — |
| Expiry date | Jan 3, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T50/60
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A system of contra-rotating propellers for an aircraft turbomachine, including: a free power turbine including a first rotor; first and second propellers; and a mechanical transmission system including a planetary gear train fitted with a sun gear driven by the rotor, at least one planet gear driving the first propeller, and a ring driving the second propeller. The free power turbine also includes a second rotor that is contra-rotating relative to the first rotor, and rotating the ring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.