TWO-OUTLET CENTRIFUGAL AUGER PUMP Russian patent published in 2009 - IPC F04D9/04 F04D29/66 F04D13/04 

FIELD: engines and pumps.

SUBSTANCE: invention relates to pumps, particularly to centrifugal auger pump and can be used, primarily, in liquid-propellant jet engine turbopump units. Proposed pump comprises double-sided impeller 2 with hub 3 fitted on shaft 1 and two augers 10 arranged on both sides of aforesaid impeller 2. Hub 3 has inner chamber 4. Additional shaft 8 is arranged concentrically with shaft 1 to support augers 10 on its both ends. Center of shaft 1 accommodates hydraulic turbine wheel 12 arranged inside inner chamber 4. Right before aforesaid turbine wheel, nozzle box 13 is fitted on hub 3 of impeller 2. Hub 3 has radial inlet holes 22 , while outlet holes 5,6 are arranged on both sides to enter inner chamber 4. Additional shaft 8 is produced from magnetoparent material. Shaft 1 supports drive magnets 20, while impeller hub 3 carries driven magnets of at least one magnetic coupling. At least two bearings may be fitted between shaft 1 and additional shaft 8.

EFFECT: improved anti-cavitation properties.

2 cl, 2 dwg