Patent ID: 8257031

Claim:
A turbo compressor comprising: a first wall and a second wall that are mutually separated in an axial direction of an impeller with a diffuser flow path formed therebetween; an annular member of which at least a portion is capable of being disposed in the diffuser flow path; and a position adjustment device that supports the annular member and adjusts the height of the annular member from the first wall or the second wall, wherein the position adjustment device comprises: a plurality of lever mechanisms that each have a rod connected to the annular member and are disposed separated from each other in the circumferential direction, each rod being guided in the axial direction; a transmission mechanism that transmits a drive force that at least one of the plurality of lever mechanisms has received to the other lever mechanisms and has a substantially circumferential linkage in which an open section is partially provided; a plurality of connecting portions each of which connects the lever mechanism and the transmission mechanism, the open section positioned adjacent to two connecting portions; and the transmission mechanism including at least one variable joint which adjusts a tension of the substantially circumferential linkage.