| 摘要 |
The invention refers to a propeller blade, for a wind turbine, designed to provide the same with the greatest possible adaptability to varying wind strength by making the blade twistable, yielding and elastic like a sail or a bird's wing. Due to the axial increase in relation to an imaginary axis of rotation, being constant along the entire length of the blade there is retained the greatest possible co-operative angular velocity and torque on the wind turbine between the boss and the periphery, obtained by the air current which flows through the turbine. At a stiff and banked blade this co-operation merely occurs at one single determined service condition. At other service conditions there is a certain difference in the operation at the boss and periphery. This reduces the efficiency in such a wind turbine. With the blade design, which the patent application refers to, the blade length is likely to be rather limited and thereby also the outer diameter of the turbine. In order to still achieve the desired effects during power generation, several turbines can be connected together and work together in unity with e.g. a motor with several cylinders. The crosswise outward turned chambers are meant to be thought as sprung devices of relatively stiff blade material and only in certain situations as a wind controller. They are at a disadvantage with ice formation.<IMAGE> |
