ELECTRIC PUMPING UNIT Russian patent published in 1998 - IPC

FIELD: hydraulic engineering; temperature control systems in aviation and rocketry. SUBSTANCE: electric pumping unit includes housing with inlet and outlet pipe unions, holder where electric motor with impellers is arranged, bushes with bores and diaphragm located between bushes. Holder is provided with diffuser located between outlet of last impeller and hole of outlet pipe union. Diffuser is made in form of groove whose section increases from outlet of last impeller on outer surface of holder to outlet of hole of outlet pipe union on inner surface of housing. Hole of outlet pipe union is cylindrical in form. EFFECT: enhanced efficiency. 3 dwg