FIELD: non-displacement compressors and pumps.
SUBSTANCE: in some embodiments, the suction chamber of the power transmission device between the rotating member and the fluid can comprise a through hole, inlet guide vanes passing near the peripheral edge of the through hole and comprising a first group of inlet guide vanes having a symmetrical profile, second group of inlet guide vanes and third group of inlet guide vanes, wherein all inlet guide vanes of second and third group have curved profile, and bent profile of every inlet guide vane of third group differs from bent profile of other vanes of third group.
EFFECT: embodiments of an apparatus for transferring energy between a rotating element and a fluid are provided herein.
20 cl, 8 dwg
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