CENTRIFUGAL SCREW PUMP Russian patent published in 2008 - IPC F04D9/04 

FIELD: mechanical engineering; pump building.

SUBSTANCE: invention can be used in turbopump sets of liquid propellant rocket engines. Proposed centrifugal screw pump has housing and screw and impeller installed on shaft. Magnetic clutch is fitted between screw and shaft. Hydrodynamic bearing is made between shaft and screw. Thrust hydrodynamic bearing as made on one of end faces of screw. Outer diameter of screw can be made variable, for instance, conical, and bushing is installed for axial displacement over screw in housing to adjust radial clearance between bushing and screw.

EFFECT: improved cavitation properties of pump.

2 cl, 4 dwg