| 摘要 |
<p>PURPOSE:To provide a variable blade pitch device of easy maintenance at a low cost. CONSTITUTION:A rod 7 is inserted into a through hole, provided in the center of a main rotary shaft 3, and moved longitudinally by a hydraulic cylinder 9 behind the main rotary shaft 3. A rod point end is connected to the root of a blade 1 by a link mechanism 6 to change a pitch angle of the blade 1 by longitudinal motion of the rod 7. Since necessity for providing a hydraulic system and an electric system to the inside of a rotor head 2 is eliminated, oil is prevented from scattering to the outside, even when the oil leaks in an emergency, by simplifying a structure and facilitating also maintenance.</p> |
