ROCKET ENGINE TURBOPUMP ASSY Russian patent published in 2011 - IPC F04D13/04 

FIELD: engines and pumps.

SUBSTANCE: proposed assy comprises turbine 1, first and second pumps (2, 3) aligned therewith and each comprising, at least, one impeller (9, 25), one auger (11, 27) and inner and outer shafts (6, 7). Turbine wheel 1 is fitted on inner shaft 6. At least, one pump, e.g. first pump 2, represents a two-stage pump, both stages representing screw-type radial flow stages. Hydraulic turbine 24 fitted on outer shaft 7 is arranged between auger 22 and second-stage impeller 16 of pump 2. Said outer shaft runs inside first-stage impeller 9 to be coupled with auger 11 of first-stage auger 11. Auger 22 has outer retaining ring 23 rigidly jointed with second-stage impeller 16 of pump 2. First-stage impeller 9 of pump 2 is articulated via magnetic coupling 15 with inner shaft 6.

EFFECT: improved cavitation properties, unloading axial forces at inner and outer shafts.

3 cl, 5 dwg