| 摘要 |
A first wind driven generator (10A) is provided with a rotor head (12) to which wind wheel blades (11) are mounted, a nacelle (14) for rotationally supporting the rotor head (12), a support strut for supporting the nacelle (14), an opening (16) formed in the front end of the rotor head (12) and taking in outside air, and air supply promoting guides (17A) mounted on the outer periphery of the opening (16) in the rotor head (12) and collecting outside air into the opening (16). The air supply promoting guides (17A) rotate with rotation of the rotor head (12) to cause the opening (16) to positively take outside air into the rotor head (12). The outside air taken into the rotor head (12) increases the amount of dissipation of heat of the surface of a rotor head casting (22), and as a result, the inside of the rotor head (12) can be efficiently cooled without requiring additional power. |
