| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotational force propulsion device for a windmill for wind power generation which improves power generation efficiency and is immune even to gales by sufficiently obtaining a rotary moment by starting rotating blades even under gentile winds whose wind velocity is about 0.3 m/s, and rotating the windmill with high power generation efficiency in a wind velocity over a wide range, in a vertical shaft windmill for wind power generation.SOLUTION: A vertical shaft windmill includes: a rotary shaft member erected vertically; a support member whose one end is connected to the rotary shaft member; and blades mounted to another end of the support member. A pair of blades are provided so as to be disposed at symmetrical positions with the rotary shaft member as a symmetry axis. The support member is characterized in that the longitudinal cross section thereof is formed in a fish shape excluding the tail in a forward direction, and that a sheet-shaped rotational force promoting member is mounted from the tail. |
