RESERVED ELECTRIC PUMP UNIT Russian patent published in 2000 - IPC

FIELD: hydraulic machine engineering, possibly aircraft and aerospace vehicle equipment, other industry branches. SUBSTANCE: doubled electric pump unit includes housing having inlet and outlet unions and embedding two centrifugal electric pumps. Inlet cavities of electric pumps are communicated with inlet union, their outlet cavities are communicated with outlet union through double check valve mounted between diffusers of electric pumps. Each electric pump is in the form of cylindrical casing for placing pump unit and electric motor. Diffuser of pump unit is in the form of variable cross section groove on outer surface of casing. In housing there are turnings for each casing and cylindrical duct joining them for communicating diffusers of both electric pumps one with another and with outlet union. Check valve is placed in sleeve having sealed outer surface and mounted in said cylindrical duct. EFFECT: enhanced manufacturability and reduced size of electric pump unit. 2 dwg