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

FIELD: engines and pumps.

SUBSTANCE: unit includes housings 14, 15 34, 35, 37, 44, 45, 47, two screws 33, 43 and two centrifugal impellers 31, 41 with hubs 32, 42, which are installed on shafts in bearings 53-55 protected with seals 56-58, and three gas turbines 4-6 installed in housing 14 with suction and exhaust nozzles 16, 18. Turbines 4-6 include guide vanes 10-12 and impellers with blades 7-9. Between outer and inner shafts 28 and 30 there installed is intermediate shaft 29. Impeller of the first turbine 4 is installed on outer shaft 28, impeller of the second turbine 5 is installed on intermediate shaft 29, and impeller of the third turbine 6 is installed on inner shaft 30. The first centrifugal impeller 31 of pump 2 is installed closer to turbine 4 on outer shaft 28. The first screw 33 and the second impeller 41 of pump 3 are installed on intermediate shaft 29. The second screw 43 is installed on inner shaft 30.

EFFECT: improving cavitation properties of pumps included in turbine-pump unit, and providing removal of forces from all shafts.

4 cl, 1 dwg