| 摘要 |
PROBLEM TO BE SOLVED: To provide a wind turbine generator in which a main bearing can be replaced without removing a rotor head or a main shaft at a wind turbine.SOLUTION: A wind turbine generator comprises a hub including at least one wind turbine blade, a main shaft 1 whose one end is connected to the hub, and at least one main bearing 2 supporting the main shaft 1. The main bearing 2 is a roller bearing, and an inner race 5 of the main bearing 2 is divided into a first member 51 which contacts the main bearing 2 at an inner side in the radial direction and has a through-hole 51A in the axial direction, and a second member 52 having a track plane of a roller 4 at an outer side in the radial direction. The main shaft 1 has a step portion 1A having a large diameter at a hub side and a screw hole on a wall surface of the step portion 1A, and the first member 51 is fastened to the main shaft 1 by a bolt 53 which is inserted through the through hole 51A to be screwed into the screw hole 1B. |
