| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a brake system for a horizontal shaft type windmill for efficiently rotating the windmill when the wind power is normal, restricting the rotation when the wind power is strong, and restoring the efficient rotation when the wind power returns to normal, and capable of these operations with a simple mechanism with neither electric control nor manual operation. <P>SOLUTION: An impeller 2 is provided freely to move in the axial direction of a rotary shaft, and an energizing means 11 for energizing the impeller 2 in a direction opposite to the wind is provided. When the wind speed exceeds a certain value, the impeller 2 is moved by the wind power in the same direction with the wind in the axial direction of the rotary shaft, resisting the energizing force by the energizing means 11. When the wind speed becomes a certain value or less, the impeller 2 is moved in a direction opposite to the wind in the axial direction of the rotary shaft by the energizing force of the energizing means 11. Brake means 14 and 15 are provided to be engaged with each other to decelerate the rotation of the rotor 2 when the impeller 2 is moved in the same direction with the wind in the axial direction of the rotary shaft. <P>COPYRIGHT: (C)2004,JPO |
