Turbofan engine including fans with reduced speed
US6209311A · kind A · utility
50Cited by
12References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 22, 1999 |
| Grant date | Apr 3, 2001 |
| Priority date | — |
| Expiry date | Dec 22, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T50/60
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An impeller is directly driven by an output shaft of a core engine. The airflow produced by the impeller rotates an air turbine and a fan disposed integrally with the air turbine. The impeller and the air turbine form a fluid coupling which serves also as a speed reducing mechanism. The rotational speed of the fan can be reduced to be lower than that of the output shaft while retaining efficiency of the core engine. The outer diameter of the fan can be increased, raising a bypass ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.