| 摘要 |
PURPOSE:To make a vertical shaft windmill always act as a shape to generate lift, and generate the lift surely in rotary operation by forming a shape of a vane cross section of a main vane in a symmetric vane shape, and forming the side surfaces of a duct blade in a ship bottom shape. CONSTITUTION:A front cover part 3A to cover a front part by forming the side surfaces in a ship bottom shape on the outer peripheral part side of a main vane 2, is formed on the main vane 2 whose vane cross section is formed in a symmetric vane shape on a windmill rotary shaft 1. Next, a duct blade 3 formed by arranging a ventilating port 3B in the formed front cover part 3A so as to improve an air current flow, is fixed to/installed on the main vane 2 by giving a certain degree of elevation angle in the motional direction. A part corresponding to the keel of a ship bottom in a central part of the duct blade 3 is used as a keel part formed in a rocket shape, and canvases are installed above and below the keel part, and a sail wing windmill blade is formed. Thereby, since an effect to facilitate starting by a weak wind is obtained, wind power energy can be utilized most effectively. |
