Vane segment and axial-flow fluid machine including the same

A vane segment which configures part of a vane ring and in which a plurality of vanes are connected in a circumferential direction, comprising:

• an outer connection member which extends in the circumferential direction and connects the plurality of vanes;
• positioning jigs for positioning end vanes located at both ends in the circumferential direction of the plurality of vanes with respect to the outer connection member;
• and
• radial restriction sections which restrict the outer connection member so as to be relatively immovable to an outer side in a radial direction of the vane ring with respect to at least one vane of the plurality of vanes, wherein
• each of the plurality of vanes has a vane main body extending in the radial direction and an outer shroud provided at a radial outer side of the vane main body,
• grooves are formed in the outer shrouds, the grooves being dented toward a radial inner side from a radial outer side, extending in the circumferential direction, and connected to each other in a state where the plurality of vanes are arranged in the circumferential direction so as to allow the outer connection member to be fitted thereinto,
• openings are formed in each of portions of the outer connection member which fit into the grooves of the two end vanes, each of the openings penetrating in the radial direction such that the positioning jig is inserted thereinto,
• holes are formed in bottoms of the grooves of the two end vanes, the holes being dented toward a radial inner side such that the positioning jigs inserted into each of the openings of the outer connection member are inserted thereinto, and
• at least one positioning jig of the positioning jigs which perform positioning of the two end vanes is an eccentric positioning jig having a first columnar portion and a second columnar portion which is eccentric with respect to a central axis of the first columnar portion.