Method of lifting nacelle, nacelle lifting mechanism, tower, and wind turbine generator

摘要

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.

主权项

1. A method of lifting a nacelle installed on a tower, comprising:
attaching a tapered bushing mechanism to a through-hole provided for a member of said tower; attaching a push-up bolt to said tapered bushing mechanism; and raising said push-up bolt while pushing said push-up bolt against a first member provided for said nacelle, wherein said tapered bushing mechanism comprises a tapered bushing inner cylinder and a tapered bushing outer cylinder, wherein said tapered bushing inner cylinder comprises a first taper section whose outer diameter becomes larger toward an end of said tapered bushing inner cylinder and a first screw thread formed on an inner surface of said tapered bushing inner cylinder, wherein said tapered bushing outer cylinder comprises a second taper section whose inner diameter becomes smaller toward an end of said tapered bushing outer cylinder, wherein said attaching said tapered bushing mechanism to said through-hole comprises: inserting said tapered bushing mechanism in said through-hole such that the end of said tapered bushing inner cylinder is positioned on an up side, the end of said tapered bushing outer cylinder is positioned on a down side, an outer circumferential surface of said first taper section and an inner surface of said second taper section contact, and an outer circumferential surface of said tapered bushing outer cylinder contacts said through-hole; and pulling down said tapered bushing inner cylinder in a state that said tapered bushing mechanism has been inserted in said through-hole, and wherein said raising said push-up bolt comprises turning said push-up bolt in a state that said push-up bolt has been engaged with said first screw thread.