LEAK-FREE ELECTRIC PUMPING UNIT Russian patent published in 1999 - IPC

FIELD: temperature control system in rocketry and aeronautical engineering. SUBSTANCE: leak-free electric pumping unit includes housing with inlet and outlet pipe unions, electric motor and impellers mounted inside this housing; impellers are connected with electric motor shaft. Inlet and outlet pipe unions are respectively connected with inlet and outlet cavities. Normally adjustable throttle valve is fitted between inlet and outlet cavities; normally closed cocks are fitted between inlet cavity and inlet pipe union and between outlet cavity and outlet pipe union, respectively. Thermal compensator is also provided which is brought in communication with inner cavity of electric pumping unit; the entire volume of electric pumping unit is filled with working fluid. EFFECT: possibility of conducting autonomous tests at any stage of operating cycle. 1 dwg