| 摘要 |
The invention concerns a rotor intended to rotate in a fluid flowing in a fl ow direction (A) and comprising a plurality of rotor blades (2), at the most fo ur blades, which are arranged to rotate about an axis of rotation (3). Each bla de (2) forms a single-curved surface the generatrix of which extends in a plane normal to the axis of rotation, and an imaginary plane interconnecting the leading edge and trailing edge of the blade forms an acute angle with the ax is of rotation (3). In addition, each blade is pivotally mounted for pivotal movement about a pivot shaft (8) in order to adjust said angle, said pivot shaft (8) extending in a plane that is normal to the axis of rotation (3) an d is parallel to and spaced a distance (d) from an imaginary radius (9) radiating from the axis of rotation (3). The rotor is very silent and provid es efficient energy conversion, for example extraction of wind power.
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