| 摘要 |
PROBLEM TO BE SOLVED: To obtain a variable blade type wind power conversion mechanism having wind turbine blades reducing the wind speed and wind receiving state of a wind turbine by wind power when a strong wind blows. SOLUTION: In the variable blade type wind power conversion mechanism A, a plurality of trifurcate retaining arms 10a, 10b, 10c are provided on upper and lower sides of a rotating shaft 11x rotatably supported in the vertical direction, and a plurality of variable blades 14 for receiving wind are mounted to vertical support shafts 13x rotatably provided in predetermined radial positions of the pair of retaining arms 10a, 10b, respectively. The variable blade 14 has an approximately arcuate cross section in plane view and length in the vertical support shaft direction corresponding to between the upper and lower retaining arms 10a, 10b. A plummet 18 is mounted to ends of arms 17, 17 of a link mechanism connected to the support shaft 13x. An elastic member 13b is mounted between the plummet 18 and the other retaining arm 10c, and due to the elastic force, the variable blade 14 is held in the fully opened state until predetermined wind speed. During rotation at wind speed not lower than the predetermined one, the centrifugal force of the plummet 18 overpowers the elastic force of the elastic member 13b, to close the variable blade 14 in accordance with the magnitude of the wind speed. COPYRIGHT: (C)2009,JPO&INPIT
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