Wind wheel for wind power generation

摘要

Provided is a power generating wind turbine in which parts and compoments installed in or on a nacelle are made smaller and lighter and maintenance is facilitated. A main shaft 11 , a gear-box speeding up rotation of the main shaft 11 and a generator 13 driven by output of the gear-box 11 are provided on a nacelle bed plate 6 . The main shaft 11 is connected to an input shaft 12 a end of the gear-box 12 via a double-row tapered roller bearing 16 . The main shaft 11 is supported to be fitted to a wall portion W 1 of the nacelle bed plate 6 with the double-row tapered roller bearing 16 being interposed therebetween. The main shaft 11 is formed in an annular shape having its outer diameter D 1 made larger than its axial directional length L 1.