TURBO-PUMP UNIT Russian patent published in 2011 - IPC F04D13/04 F04D9/04 

FIELD: engines and pumps.

SUBSTANCE: unit includes housings 10, 18-20, 22, 23, pump 1 and gas turbine 2. Pump 1 includes screw 11, centrifugal impeller 4 with hub 5 having inner cavity 27 and which is installed on shaft 3 which is installed in bearing 9 protected with seal 31. Turbine 2 includes at least one stage with guide vanes 17 and impeller 15. Screw 11 is installed on shaft 3 with possibility of sliding. Before screw 11 there installed is hydroturbine 12 rigidly attached to it, and before hydroturbine 12 there installed is additional screw 13 having bandage 14 rigidly attached to centrifugal impeller 4. Inside hub 5 there is inner cavity 27 and through holes 28 attaching inner cavity 27 of hub 5 to cavity 8 inside impeller 4. Inside through holes 28 there installed are centrifugal flow controls 35.

EFFECT: improving cavitation properties of pump included in turbine-pump unit, and providing removal of axial forces.

4 cl, 6 dwg