FIELD: non-displacement compressors and pumps.
SUBSTANCE: centrifugal compressor stage comprises impeller (10) rotating with respect to stator (13) having multiple rotor blades (12) on the rotor side, wherein each impeller blade (12) has inlet flow edge (16), outlet flow edge (17), and suction side (19) extending between flow inlet edge (16) and flow outlet edge (17), pressure side (18) and outer surface (20) facing stator (13). On outer surface (20) of at least one impeller blade (12) there is at least one groove (22) defined both on suction side (19) and on pressure side (18) by longitudinal web (23, 24), each of longitudinal webs (23, 24) forming a sealing conical end of corresponding impeller blade (12) relative to stator (13).
EFFECT: invention is aimed at improving the reliability of a compressor stage.
19 cl, 10 dwg
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