FIELD: machine building.
SUBSTANCE: group of inventions relates to hydraulic Francis turbines, including blades and rim of impeller of its turbine. Impeller 48 of hydraulic turbine includes rim 62, having ratio of rim length and rim diameter of not more than 17 %, hub 58, blades 50 of wheel 48, extending from hub 58 to rim 62, and connection between front edge of blade 50 and rim 62, which precedes connection of front edge 52 with hub 58 in direction of rotation, rear edge 54 of blade 50, having curvature between rim 62 and hub 58, bent to edge 52 of blade 50.
EFFECT: group of inventions is aimed at improving characteristics of impeller and reduced cavitation in impeller.
13 cl, 15 dwg
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