FIELD: engines and pumps.
SUBSTANCE: stage includes impeller and guiding device. There are additional vanes mounted on guiding device from the side of open edges of impeller blades. Stage flowing channel is equipped with vortex breakers that are made in the form of annular bosses in stage flowing channel or in the form of supporting washes mounted in annular bores of impeller blades and vanes of guiding devices. Annular boss in flowing channel of impeller of minimal diameter is made in the form of axial support of impeller and is equipped with radial channels.
EFFECT: increase of stage pressure and efficiency coefficient.
4 cl, 4 dwg
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