DEVICE FOR INCREASING STABLE OPERATION OF AXIAL-RADIAL HYDRAULIC TURBINE (VERSIONS) Russian patent published in 2012 - IPC F03B11/04 

FIELD: engines and pumps.

SUBSTANCE: invention relates to hydraulic machinery and may be used in suction tubes of radial-axial hydraulic turbines at hydroelectric power stations. Proposed device comprises nozzle 1 for fluid feed to suction tube 2 beyond outlet edge of wheel 3. Nozzle 1 is made in the wall of tube 2 beyond outlet edge of wheel 3 to communicate via, at least, one bypass line 4 with downstream tube section 2. Nozzle outflow face represents annular slit or holes on tube 2 that make skewed face of nozzle 1 and ledge on tube wall. Ledge edge nearby wheel 3 extends beyond ledge edge, further from wheel 3.

EFFECT: reduced flow pulsations, stable operation.

11 cl, 9 dwg