TURBO-PUMP UNIT Russian patent published in 2012 - IPC F04D13/04 F04D29/41 

FIELD: engines and pumps.

SUBSTANCE: unit contains pumps of oxidiser and fuel with spline joined shafts, turbine wheel is fastened on one of shafts. Unit contains dummy piston of automatic unloading machine, the piston is combined with the main propeller disk of one of pumps. Unloading machine is restricted by radial seal in peripheral part of the main disk and by control axial slot near propeller hub. Ball bearing of this pump is designed with outer ring installed in housing with axial gap, ball bearing of the second pump is designed with axial stop located in housing with gap along butt end of ball bearing outer ring. Shaft of one pump with backing butt-end rest on backing butt-end of shaft of the second pump. Gaps along butt-ends of axial stop of outer ring of ball bearing of pump without unloading machine are designed larger than corresponding axial gaps along butt-ends of outer ring of ball bearing of pump with unloading machine.

EFFECT: improving efficiency factor of turbo-pump unit and enhancing pump anticavitation properties.

3 cl, 3 dwg