| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem of becoming a large-scale constitution as the whole windmill, for requiring a strong installation frame, due to taking a structure for supporting at opposite ends from both sides in the vertical direction of the windmill, for stably and efficiently rotating in a strong wind. <P>SOLUTION: An impeller 1 is connected by three blades 8 and a hub 9 of arranging the mutual blades 8 in the center in the vertical direction of the impeller 1 becoming a gravity center position, a disk plate 10 of a disk plate shape is also arranged in an end part in the vertical direction of the impeller 1, the impeller 1 is connected with a rotary shaft 2 in a central part of the hub 9, and a distance between the hub 9 and a bearing 3 is set to a diameter or less of the rotary shaft 2. A round hole is opened in the disk plate 10 on the lower end of the impeller 1 so as not to contact with a casing 6. A natural frequency of the impeller 1 is designed so as not to exist in a rotating speed range having the possibility of rotating, by adjusting curvature of the blades 8 by taking into consideration so as not to have adverse influence on performance of the windmill. <P>COPYRIGHT: (C)2012,JPO&INPIT |
