FIELD: hydraulic machines.
SUBSTANCE: hydraulic turbine comprises impeller (12) including hub (17), rim (18) and blades (16) extending between hub (17) and rim (18), and stator (11) surrounding wheel (12) and comprising upper ring (19), lower ring (20) and guide vanes (15) passing between rings (19, 20). Between wheel (12) and stator (11) gap (C) is made to minimize pressure pulsations occurring in vaneless gap (VG) between blades (16) of wheel (12) and blades (15) of stator (11). Gap (C) comprises first gap located between hub (17) and ring (19). Between first gap and radius of hub (17) first ratio is defined, which is more than 0.02.
EFFECT: group of inventions is aimed at reducing level of pressure oscillations in vaneless space, higher overall efficiency of turbine.
7 cl, 6 dwg
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