FIELD: engines and pumps.
SUBSTANCE: invention is related to the field of pump engineering, in particular to multistage centrifugal pumps. Device for increase of centrifugal pump efficiency comprises pump component, such as impeller or diffuser 54, having multiple blades 58, arranged with the possibility to create paths for fluid medium flow. At least one blade 58 has channel 60, which passes through base 70 of hub 74 of blade 58 between paths of fluid medium flow, which are separated from each other by blade 58.
EFFECT: reduced unfavorable consequences of secondary flow, which may be the reason for hydraulic losses, and increased efficiency of pump.
15 cl, 6 dwg
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