BLADE SYSTEM OF IMPELLER OF RADIAL AXIAL HYDRAULIC TURBINE

摘要

FIELD: engines and pumps. ^ SUBSTANCE: blade system of impeller of radial axial hydraulic turbine includes rim 1, hub 2 and blades 3, each of which is connected to rim 1 and hub 2 and provided with inlet and outlet edges 4 and 5 of bent shape and smoothly changing thickness in the direction from inlet edge to outlet edge and from hub 2 to rim 1. Blades 3 of blade system have thickened part near inlet edge 4. Maximum thickness of blade 3 in its section with hub 2 is more than maximum thickness of blade 3 in its section with rim 1. Optimum intervals of values of parameters are determined: maximum thickness of section of blade 3 with hub 2, maximum thickness of section of blade 3 with rim 1, as well as their location places along straightened middle line of the appropriate section. ^ EFFECT: preventing flow separation after inlet edges of blades at operation of hydraulic turbine in modes with increased heads and modes with partial loads in the whole range of working heads. ^ 10 dwg