Abstract: A method of repairing a bearing of a wind turbine generator is provided which is able to more permanently repair a gap which occurred between a constituent member of the wind turbine generator and a bearing ring of the bearing. For example, in the case of repairing the gap 13 between the main shaft outer cylinder 10 of the wind turbine generator 1 and the outer ring 12A of the main bearing 12, the plate 40 is inserted between the main shaft outer cylinder 10 and the outer ring 12A, and also the plate 40 is fixed to an inner circumferential surface of the main shaft outer cylinder 10 by the adhesive agent 41. On the other hand, slip is permitted between the plate 40 and the outer ring 12A of the main bearing 12.

Abstract: A method of repairing a bearing of a wind turbine generator is provided which is able to more permanently repair a gap which occurred between a constituent member of the wind turbine generator and a bearing ring of the bearing. For example, in the case of repairing the gap 13 between the main shaft outer cylinder 10 of the wind turbine generator 1 and the outer ring 12A of the main bearing 12, the plate 40 is inserted between the main shaft outer cylinder 10 and the outer ring 12A, and also the plate 40 is fixed to an inner circumferential surface of the main shaft outer cylinder 10 by the adhesive agent 41. On the other hand, slip is permitted between the plate 40 and the outer ring 12A of the main bearing 12.

Abstract: The present invention is to provides a foil gas bearing which has sufficient damping effects due to a frictional force and a sufficient stiffness to support the rotary shaft. The foil gas bearing has a rotary shaft retainer for retaining a rotary shaft; and a back spring for preventing the displacement of the rotary shaft, which is provided between rotary shaft and rotary shaft retainer. Plural protrusions are formed at one element, which is either the rotary shaft retainer or the back spring. Plural recesses are formed at the other elements, which is either the back spring or the rotary shaft retainer at places which correspond to the protrusions. The protrusions partially fit into the recesses.

Abstract: One object of the present invention is to provide a foil gas bearing which has sufficient damping effects due to a frictional force and a sufficient stiffness to support the rotary shaft; in order to achieve the object, the present invention provide a foil gas bearing comprising: a rotary shaft retainer for retaining a rotary shaft; and a back spring for preventing the displacement of said rotary shaft, which is provided between said rotary shaft and said rotary shaft retainer; wherein plural protrusions are formed at one element which is either said rotary shaft retainer or said back spring; plural recesses are formed at the other element which is either said back spring or said rotary shaft retainer at places which correspond to said protrusions; and said protrusions partially fit into said recesses.