| 摘要 |
The present invention relates to a windmill device rotating by a wind power. More particularly, to efficiently obtain rotating energy irrespective of a wind direction, the present invention is firstly characterized in that assuming that an outermost radius as a distance between the remotest position of each blade from the center of a vertical shaft and the vertical shaft is r1, an innermost radius as a distance between the nearest position of each blade to the vertical shaft and the vertical shaft is r2, and the angle (rad) of an arbitrary position r in an inner peripheral surface of the cross-section of the blade by regarding a line segment for connecting the remotest position from the vertical shaft to the vertical shaft as a reference is t (in this case, 0<=t<=2pi/3), the form of the inner peripheral surface in the cross-section of each of the three blades satisfies a following formula: r=(r1-r2)x((t-2pi/3)x2)/(2pi/3)x2+r2. The present invention is secondly characterized in that fixed guide fins which do not rotate are provided in the outer periphery of the windmill device. The present invention is thirdly characterized in that wind introduced along the blades can be smoothly evaded outside the windmill without forming a vortex flow.
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