Axially compact ram air turbine
US5257907A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 20, 1992 |
| Grant date | Nov 2, 1993 |
| Priority date | — |
| Expiry date | Feb 20, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E10/728
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An undesirably long axial length of a ram air turbine may be reduced in a construction including a hub (110) mounted for rotation about a rotational axis (112), at least one turbine blade (114) rotatably mounted on the hub (110) for rotation between coarse and fine pitch positions about a blade pitch axis (116) which is different from the rotational axis (112) and a counterweight assembly (120) for each turbine blade (114) and mounted on the hub (110) for rotation between coarse and fine pitch positions about the blade pitch axis (116) in spaced relation to the rotational axis (114) and disposed when rotated about the rotational axis (112) to bias the turbine blade (114) towards its coarse pitch position. A limited lost motion connection (143, 144, 145, 146, 147, 148, 150) is located between the turbine blade (114) and the counterweight assembly (120). The main governor spring (130) biases the counterweight (120) toward a fine pitch position and a spring (142 ) acts across the lost motion connection (143, 144, 145, 146, 147, 148, 150) and biases the blade (114) toward the coarse pitch position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.