FAN OF TURBOFAN AIRCRAFT ENGINE Russian patent published in 2018 - IPC F02K3/06 F04D29/66 F02C7/45 F02K1/44 

FIELD: engine building.

SUBSTANCE: invention relates to aircraft engine construction and can be used to create a fan of a turbofan engine. Fan of a turbofan aircraft engine is proposed, including a housing, an impeller and a rectifying device, a rectifying device equipped with an apparatus for rotating blades to three predetermined angles, each of which corresponds to one of the engine operating modes: take-off, ascend, cruise modes. Apparatus for turning the blades of a straightening apparatus contains a speed sensor and a block, triggered by the speed of the sensor, made in the form of a mechanical template for rotating the blades at an angle corresponding to the mode of operation of the engine. In another embodiment, the apparatus of rotation of the blades of the straightening apparatus contains a speed sensor and a unit that is triggered by the speed of the sensor, made in the form of a microprocessor, which determines the mode of operation of the engine and giving the command to the apparatus of rotation to install the blades at an angle corresponding to this mode.

EFFECT: technical result of the invention is to reduce the noise level of the aircraft during takeoff and climb at the control points, regulated by the ICAO standard, as well as on the cruise mode – in achieving the highest possible fan efficiency.

3 cl, 4 dwg