VERTICAL AXIS WIND TURBINE

• Main Authors: HARA YUTAKA, SHIOZAKI AKIRA, SHIOTANI KEISUKE, SAITO EITOKU, NISHIONO HIROAKI
• Format: Patent
• Language: English; Japanese
• Published: 01.02.2016
• Subjects: BLASTING; HEATING; LIGHTING; MACHINES OR ENGINES FOR LIQUIDS; MECHANICAL ENGINEERING; OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR; PRODUCING MECHANICAL POWER; WEAPONS; WIND MOTORS; WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS

PROBLEM TO BE SOLVED: To provide a vertical axis wind turbine having an overspeed prevention structure including a quite simple structure without using any surplus control parts so as to restrict only an axial motion of a blade shaft supporting a blade and a self-rotation of the blade shaft and enabling its manufacturing to be attained in less-expensive manner.SOLUTION: In this invention, one end part of a blade shaft 21 is held at a rotary hub and a blade is fixed to the other end of the blade shaft 21. This blade shaft 21 can be moved in a radial direction due to a centrifugal force accompanied by rotation of the blade and at the same time the blade shaft is twisted around an axis of its radiation direction to cause a wind receiving area of the blade and an effective pitch angle of the blade to be changed and there is provided a restricting structure for restricting a motion of the blade shaft in its radial direction and its self-rotation.SELECTED DRAWING: Figure 1 【課題】余分な制御部品を用いることなく、ブレードを支持するブレード軸の軸方向移動とブレード軸の自転を規制するだけの非常に簡単な構造で、安価に製造することができる過回転防止構造を有する垂直軸風車を提供する。【解決手段】回転用ハブにブレード軸２１の一端部側が保持され、そのブレード軸２１の他端部にブレードが取り付けられている。このブレード軸２１が、ブレードの回転に伴う遠心力により半径方向に移動し得ると共に、半径方向を軸としてツイストすることによりブレードの受風面積および実効的ピッチ角を変えられるように取り付けられ、ブレード軸２１の半径方向の移動と自転とを規制する規制構造体を備えることを特徴とする。【選択図】図１