DUPLICATED ELECTRICALLY-DRIVEN PUMP UNIT Russian patent published in 2020 - IPC F04D13/14 

FIELD: astronautics.

SUBSTANCE: invention can be used in systems of thermal control of space engineering products. Duplicated electrically-driven pump unit comprises a housing with inlet and outlet nozzles and two centrifugal electrically-driven pumps installed in it. Output cavities of electric pumps are communicated with outlet union via two-way check valve. Valve is installed between the electric pump diffusers in the cylindrical cavity of the housing and looks like a plate fixed on the rod. Rod is located in central holes of the first and second seats. Outlets of diffusers are interconnected with cylindrical cavity of housing. Cylindrical cavity of housing is made blind and two-stage with different diameters of stages. Step of smaller diameter adjoins the bottom of blind cavity, and larger – is made on the side of open end. Outer diameters of seats are equal to diameter of larger step. First seat is installed with thrust against the end between steps. Between the seats with a thrust in their butt ends a remote bushing with slots for liquid passage into the outlet union is installed.

EFFECT: invention is aimed at improvement of assemblability.

1 cl, 2 dwg