CENTRIFUGAL COMPRESSOR

摘要

A centrifugal compressor configured so that the accumulation of deposit is reduced to enable the vanes of the centrifugal compressor to rotate smoothly. A compressor (11) has first vanes (52) which are provided on the shroud side of a diffuser path and second vanes (53) which are provided at the positions on the hub side which face the first vanes (52). The compressor (11) also has a slide type vane mechanism (50) which causes the second vanes (53) to protrude and retract from the diffuser path through slits (51a) in a hub-side wall plate (51) according to a load on the compressor (11). When the slide type vane mechanism (50) causes the second vanes (53) to protrude into the diffuser path, the end surfaces of the first vanes (52) and the end surfaces of the second vanes (53) face each other near the center of the diffuser path.