VERTICAL SHAFT TYPE WIND MILL WITH BUILT-IN VERTICAL BLADE CAPABLE OF PROVIDING ROTATIONAL ENERGY BY BOTH FRONT AND REAR SURFACES

摘要

PROBLEM TO BE SOLVED: To solve a problem in a vertical shaft type wind mill wherein its usability is lower than that of a horizontal shaft type wind mill though environmental protection and equipment cost are said to be absolutely advantageous because the structure of vanes or blades for taking energy from the flow of wind is poor or the efficiency of the functions thereof is low by developing and modifying the blade installed in the vertical shaft type wind mill.;SOLUTION: In this vertical shaft type wind mill, the built-in blade is horizontally rotated, and a difference between the energy obtained by receiving the wind and a drag when it returns windward against the wind is transmitted to a shaft as a rotational force. The more the difference is increased, the more the efficiency is increased. This vertical blade can increase the efficiency since an area in which the energy can be obtained from the flow of the wind is increased from the front surface side to the rear surface side and as the rotation is advanced, the rear surface side is positioned parallel with the wind direction and the drag is reduced to zero, whereby the efficiency is increased due to an increase in the difference.;COPYRIGHT: (C)2006,JPO&NCIPI