DEVICE FOR IMPROVEMENT OF OPERATING STABILITY OF RADIAL-AXIAL HYDRAULIC TURBINE Russian patent published in 2013 - IPC F03B11/04 

FIELD: machine building.

SUBSTANCE: device for improvement of operating stability of a radial-axial hydraulic turbine includes bypass channel 3 made along the axis of impeller 1 of radial-axial hydraulic turbine 2 and interconnected at the outlet with space after outlet section of blades 4 of impeller 1 of hydraulic turbine 2. Impeller 1 is equipped with axisymmetrical fairing 7 fixed on sleeve 5 of impeller 1 and located in the space behind trailing edges of blades 4 of impeller 1 coaxially to the latter and converging in the direction of suction pipe 6. Outlet section of fairing 7 is located in the zone of inlet section of pipe 6. Channel 3 is made in fairing 7 and interconnected with pipe 6 on its inlet side. On its outlet side channel 3 is interconnected with the space behind outlet section of blades 4 of impeller 1 of hydraulic turbine 2 through outlet channels 8 made in fairing 7 in radial direction.

EFFECT: reduction of intensity of flow pulsations in a flow part of a radial-axial hydraulic turbine in the zone after the impeller outlet section.

9 cl, 10 dwg