METHOD OF FLAWLESS OPERATION OF LIQUID-PROPELLANT ALL-MODE ROCKET ENGINE TURBO PUMP AT HIGH THROTTLING Russian patent published in 2014 - IPC F02K9/48 

FIELD: engines and pumps.

SUBSTANCE: invention relates to machine building, particularly to high rpm auger rotor turbo pumps of throttled liquid-propellant rocket engines. Proposed method consists in using booster pumps upstream of the main pumps. Every booster pump is driven by gas or hydraulic turbine. Note here that inlet of every turbine is communicated via pipeline with outlet of one of said pumps in hydraulic turbine and, in gas turbine, with gas line of turbo pump turbine. Note also that at pressure drop at pump inlet below that required for continuous operation of the pumps possible at high throttling head at booster pumps is increased by working fluid feed to extra nozzles with their intake manifolds. The latter are preliminary mounted in said turbines via pipelines with control devices. The latter can be composed by multiple station valves or pressure control valves.

EFFECT: cavitation-free operation of fuel feed turbo pumps at low loads.

3 cl, 1 dwg