| 摘要 |
Wind power plant rotor comprising one or more rotor blades (20, 30) and stiffening elements (5-9) to stiffen the rotor, where the rotor blades (20, 30) are arranged such that they can turn around their longitudinal axes relative to corresponding rotor stiffening elements (5-9). Each rotor blade (20, 30) may comprise at least two rotor blade parts (1, 2) where the outer rotor blade part (2) may be turnably arranged relative to the inner rotor blade part (1). The solution facilitates use of longer or slimmer rotor blades (20, 30) while strength and stiffness increase. The fatigue forces are thereby reduced while the corresponding tower structure (12) can be made stiffer and lighter. Manufacturing and transport costs are reduced. Further, the stiffening elements (5-9) may be formed with an aerodynamic outer cross section as for example a drop profile or wing profile in order to reduce air drag and audible noise. |
