Windmill rotor
Abstract
A windmill rotor of the vertical axis type having at least three main blades mounted symmetrically around a shaft and bowing outwardly to define a generally sphere-like chamber. Each main blade has a secondary blade mounted on its inner surface, and the secondary blade is movable under centrifugal force as the rotor turns. An auxiliary blade is provided adjacent to and ahead of the secondary blade to act as a scoop for the wind to provide the rotor with additional thrust at low speed. The auxiliary blade is positioned so that, as the speed of the rotor increases and the secondary blade moves outwardly, the scoop formed by the auxiliary blade is shielded from the wind, thus reducing or eliminating the additional thrust at high rotational speeds. The avoids damage to the rotor in high winds.
- Inventors:
- Publication Date:
- OSTI Identifier:
- 5750969
- Patent Number(s):
- US 4543042
- Assignee:
- IFI; EDB-86-100700
- Resource Type:
- Patent
- Resource Relation:
- Patent Priority Date: Priority date 29 Oct 1984, Canada; Other Information: PAT-APPL-666185
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 17 WIND ENERGY; ROTORS; DESIGN; VERTICAL AXIS TURBINES; TURBINE BLADES; WIND LOADS; DYNAMIC LOADS; MACHINERY; TURBINES; TURBOMACHINERY; WIND TURBINES; 170602* - Wind Energy Engineering- Turbine Design & Operation
Citation Formats
Lange, H. Windmill rotor. United States: N. p., 1985.
Web.
Lange, H. Windmill rotor. United States.
Lange, H. 1985.
"Windmill rotor". United States.
@article{osti_5750969,
title = {Windmill rotor},
author = {Lange, H},
abstractNote = {A windmill rotor of the vertical axis type having at least three main blades mounted symmetrically around a shaft and bowing outwardly to define a generally sphere-like chamber. Each main blade has a secondary blade mounted on its inner surface, and the secondary blade is movable under centrifugal force as the rotor turns. An auxiliary blade is provided adjacent to and ahead of the secondary blade to act as a scoop for the wind to provide the rotor with additional thrust at low speed. The auxiliary blade is positioned so that, as the speed of the rotor increases and the secondary blade moves outwardly, the scoop formed by the auxiliary blade is shielded from the wind, thus reducing or eliminating the additional thrust at high rotational speeds. The avoids damage to the rotor in high winds.},
doi = {},
url = {https://www.osti.gov/biblio/5750969},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Sep 24 00:00:00 EDT 1985},
month = {Tue Sep 24 00:00:00 EDT 1985}
}