With bladeless diffuser centrifugal compressor

摘要

(57) [Abstract] to enable that it is possible to optimally adjust the flow path cross-sectional area of ​​the diffuser according to the OBJECTIVE discharge flow rate. [Configuration] In a centrifugal compressor 11 having blades without diffuser 16 to the outlet side of the impeller 14, and is characterized by the provision of the throttle portion 21 for varying the flow path cross-sectional area B depending on the discharge flow rate in the diffuser 16 .