Abstract: A link pin exchanging device for a wind turbine generator that can efficiently carry out exchange of the link pin in the rotor hub, and a link pin exchanging method. The link pin exchanging device comprises an actuator for moving the link pin so that the link pin disengages from the link mechanism, and a reaction force receiving member for receiving a reaction force that acts on the actuator, independent from the wall surface of the rotor hub that intersects with the operating direction of the actuator.

Abstract: A method of lifting a nacelle installed on a tower is provided. The method includes attaching a tapered bushing mechanism to a through-hole provided for a member of the tower; attaching a push-up bolt to the tapered bushing mechanism; and raising the push-up bolt while pushing the push-up bolt against a first member provided for the nacelle. The tapered bushing mechanism includes a tapered bushing inner cylinder and a tapered bushing outer cylinder. The tapered bushing inner cylinder includes a first taper section whose outer diameter becomes larger toward an end of the tapered bushing inner cylinder and a first screw thread formed on an inner surface of the tapered bushing inner cylinder. The tapered bushing outer cylinder includes a second taper section whose inner diameter becomes smaller toward an end of the tapered bushing outer cylinder.

Abstract: A method of lifting a nacelle installed on a tower is provided. The method includes attaching a tapered bushing mechanism to a through-hole provided for a member of the tower; attaching a push-up bolt to the tapered bushing mechanism; and raising the push-up bolt while pushing the push-up bolt against a first member provided for the nacelle. The tapered bushing mechanism includes a tapered bushing inner cylinder and a tapered bushing outer cylinder. The tapered bushing inner cylinder includes a first taper section whose outer diameter becomes larger toward an end of the tapered bushing inner cylinder and a first screw thread formed on an inner surface of the tapered bushing inner cylinder. The tapered bushing outer cylinder includes a second taper section whose inner diameter becomes smaller toward an end of the tapered bushing outer cylinder.

Abstract: A maintenance method is provided for a wind turbine generator including a tower and a nacelle. The maintenance method includes: attaching a pedestal to the tower; attaching a jack to the pedestal; and lifting the nacelle by using the jack to detach the nacelle from the tower, from a state where the nacelle is rotatably connected to the tower.

Abstract: A rotor turning device for a wind turbine generator which can be used without having to modify the existing wind turbine generator. A rotor turning device includes, on the inner periphery, a first member acting as a fixing member for fixing to a coupling hub, and on the outer periphery, a second member acting as an operating member to which operational force for rotating a rotation axis of the wind turbine generator. A pair of the first members embracingly fixes to the coupling hub of a coupling, while the second member attaches to the pair of first members to form a handle-like shape.

Abstract: A link pin exchanging device for a wind turbine generator that can efficiently carry out exchange of the link pin in the rotor hub, and a link pin exchanging method. The link pin exchanging device comprises an actuator for moving the link pin so that the link pin disengages from the link mechanism, and a reaction force receiving member for receiving a reaction force that acts on the actuator, independent from the wall surface of the rotor hub that intersects with the operating direction of the actuator.

Abstract: A rotor turning device for a wind turbine generator which can be used without having to modify the existing wind turbine generator, and a method for turning the rotor. A rotor turning device comprises, on the inner periphery, a first member acting as a fixing member for fixing to a coupling hub, and on the outer periphery, a second member acting as an operating member to which operational force for rotating a rotation axis of the wind turbine generator is inputted. A pair of the first members embracingly fixes to the coupling hub of a coupling, while the second member attaches to the pair of first members to form a handle-like shape.

Abstract: A maintenance method is provided for a wind turbine generator including a tower and a nacelle. The maintenance method includes: attaching a pedestal to the tower; attaching a jack to the pedestal; and lifting the nacelle by using the jack to detach the nacelle from the tower, from a state where the nacelle is rotatably connected to the tower.