| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a brake system for a vertical shaft type windmill for efficiently rotating the windmill when the wind power is normal, restricting or stopping rotation of the windmill when the wind power is strong, and capable of restoring the efficient rotation when the wind power returns to normal, and furthermore, capable of realizing these operations with using neither electric control nor manual operation. <P>SOLUTION: A wind power float body 10 is provided. The wind power float body 10 is integrally rotated with impellers 2, and relatively moved in the vertical direction in relation to the impellers 2. The wind float body 2 receives the upward force of the applied wind power, and when the wind speed exceeds a certain value, the wind power float body 10 rises, and when the wind speed becomes the certain value or less, the wind power float body 10 lowers. Brake means 10b and 14 are provided to be engaged with each other to decelerate the rotation of the fliers when the wind power float body 10 rises. <P>COPYRIGHT: (C)2004,JPO |
