FIELD: machine building.
SUBSTANCE: centrifugal compressor with at least one stage, wherein said or every compressor stage includes an impeller with multiple moving blades, which is installed in flow part of corresponding compressor stage, wherein flow part of corresponding compressor stage is bounded by a profile of a hub and a profile of a housing or covering disc. In region of at least one compressor stage profile of hub of corresponding flow part is first changed over curvature of first concave curvature to convex curvature, and then from convex curvature to second concave curvature; and/or profile of housing or covering disc of corresponding flow part is first changed over curvature of first convex curvature to concave curvature, and then from concave curvature to second convex curvature.
EFFECT: higher efficiency of compressor.
9 cl, 2 dwg
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