DUPLICATED ELECTRICALLY DRIVEN PUMP UNIT Russian patent published in 2016 - IPC F04D13/14 

FIELD: machine building.

SUBSTANCE: invention relates to machine building and can be used in thermal control systems of items of aircraft and rocket engineering. Duplicated electrically driven pump unit comprises a housing (1) having two parts. Outer part (2) is equipped with inlet and outlet nozzles (3, 4) and bore (5), the axis of which is perpendicular to axes of nozzles (3, 4). Inner part (6) has the shape of cylinder with grooves (7, 8), in which there are centrifugal electrically driven pumps (9, 10). There is T-shaped channel (26) in web (24), in the channel there is two-way check valve (27) in the form of switching element (29). Nozzle inner surface (3) on the side of bore (5) there is a bore with diameter, equal to diameter of radial holes (25). Groove is made in wall hole (25), where a spring retaining ring is placed. Retainer of relative position of parts (2, 6) of housing (1) is made in the form of a sleeve with outer diameter, equal to diameter of hole (25) placed in the bore of inlet nozzle (3) and hole (25) between the end wall of the bore and end of spring retaining ring. Axial cavity (23) covers cross-section of the sleeve and ring.

EFFECT: higher vibration resistance and adaptability to manufacture.

1 cl, 2 dwg