TURBOPUMP UNIT ROTOR Russian patent published in 1997 - IPC

FIELD: manufacture of pumps; rotors of turbopump units of liquid propellant rocket engines. SUBSTANCE: centering surface which is in contact with bearing surface of shaft is made in first-stage impeller on side of inlet and in last-stage impeller on side opposite to impeller inlet. On section between bearing surfaces of shaft, impellers are mounted at radial clearance "б" relative to shaft which exceeds maximum amount of shaft sagging. EFFECT: enhanced reliability. 2 cl, 2 dwg