SAVONIUS WIND MILL

摘要

PROBLEM TO BE SOLVED: To provide a Savonius wind mill which can improve power conversion efficiency and startability without changing the diameter of the wind mill and the length in the axial direction, and without performing installment of an addition device, special shaping work of a curved blade, or the like.SOLUTION: Optimization of inner edge positions of curved blades 12-1 to 12-3 of a Savonius wind mill of at least three-blades type is performed. An inner edge position z of curved blades vertically disposed in a rotation plate with regular pitch in the circumferential direction of the rotation plate between two sheets of disc-like rotation plates of radius R supported freely rotatably around a center shaft 2 is set as an intersection point between a circular arc of a radius r (therein, R>r>R/2) which has a center point on a straight line a formed by connecting an outer edge on the circle of the rotation plate and a center shaft 2 and a straight line b passing through the circumference of the rotation plate at an angleαof (360°/number of curved blades-0°<30°) when the straight line a is a standard line and the center line is a base point of the angle formed by two straight lines. Other curved blades assume the same shape as the curved blade and are located on potions rotated every angle of (360°/number of curved blades) when the center shaft is set as the standard point.