Patent ID: 11774146

Abstract:
Provided are a turbo compressor and a centrifugal chiller comprising the same with which the length of a shaft in an axial direction can be shortened, rotational shake accompanying rotation of the shaft is suppressed, and a device can be made small. A turbo compressor comprising: a compressor part which compresses refrigerant; a shaft (15) which drives the compressor part around an axis of rotation X; a magnetic bearing (30A) which has provided thereto an iron core part (32) comprising a plurality of teeth parts (34) formed at equiangular intervals around the axis of rotation X, and, a plurality of coils (36) respectively wound around the plurality of teeth parts (34), and said magnetic bearing (30A) allows the shaft (15) to pass through and supports said shaft (15) without contacting the same; an auxiliary bearing which allows the shaft (15) to pass through; and a displacement sensor (50) which detects displacement of the shaft (15), wherein the displacement sensor (50) is provided between neighboring coils (36).