Device for changing a pitch of a blade of an impeller/propeller and a fan comprising the device
US8753085B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2008 |
| Grant date | Jun 17, 2014 |
| Priority date | — |
| Expiry date | Jul 23, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E10/72
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A device for changing a pitch of a blade of an impeller/propeller is disclosed. The device includes a linear actuator, a first bearing and a second bearing, allowing a relative axial movement between the first bearing and second bearing. The first bearing is mounted between a supporting structure of the rotor shaft and a non-rotary mechanical element, allowing a relative rotation between the supporting structure and the linear actuator. The second bearing is mounted between the second portion and a lever having a rotary point. Operating the linear actuator leads to an angular movement of the lever causing a change of the pitch of a blade, and when operating the at least one linear actuator, a force is generated that acts upon the non-rotary element, so that the rotor shaft is unaffected by the force.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.