| 摘要 |
The development of wind turbines in recent decades has shown that a higher wind yield or energy yield is accompanied by greater hub heights and/or rotor blade diameters. As a consequence, it was necessary for wind turbines to be dimensioned for the higher hub heights or greater rotor blade diameters, which resulted in higher loads and greater expense in relation to materials, such as foundations or support elements. The rule that applied hitherto was "higher yield equals proportionate or disproportionate dimensioning of the turbine in relation to expected (extreme) loads." The invention relates to a rotor blade having a first rotor blade section and a second rotor blade section, wherein the first rotor blade section and the second rotor blade section are designed to be movable relative to one another by means of an actuating device, such that in particular a telescopic rotor blade is formed, and a minimum position, an intermediate position or a maximum position can be formed by the rotor blade, wherein the rotor blade has a resetting device that is configured in such a way that, in the event of a functional limitation of the actuating device, the rotor blades take the minimum position. Henceforth, the rule that applies is thus "breaking the link between the yield and the dimensioning of the turbine in relation to expected (extreme) loads". Specific wind turbines can thus be produced economically for the first time. |
