AXIAL SEALED FUEL TRANSFER UNIT Russian patent published in 2023 - IPC F04D3/00 

FIELD: aircraft industry.

SUBSTANCE: aviation and chemical pumping used in aviation systems for transferring aircraft fuel, for pumping corrosive liquids, in systems for pumping liquids and fuel between tanks, fuel tanks, pumping fuel to an engine, other unit or for generating electricity, in liquid media flow metering systems. Axial sealed fuel pumping unit consists of a cylindrical stator body, on the outer surface of which there are multi-phase stator windings of an air-core electric motor, which are fed through a feedback control system from a direct or alternating current circuit. In the end caps of the unit on the suction and discharge sides, there are inlet guide and straightening apparatus with pressure sensors, with bearings on ceramic balls for the electric motor rotor shaft with a rim covering the rotor blades. Permanent magnets and rotor position sensors are located on the outer surface of the rotor rim.

EFFECT: control system receives signals from the sensors of the rotor position, fluid pressure and supplies voltage to the multi-phase windings of the electric motor with a certain frequency, necessary to create the required torque at the desired speed, or removes the voltage in the generator mode, converts it into flowmeter signals.

4 cl, 2 dwg