MAIN ROTOR FOR AIRCRAFT CAPABLE OF HOVERING IN AIR AND METHOD FOR CONTAINING VIBRATIONS TRANSMITTED TO MAIN ROTOR SHAFT OF AIRCRAFT CAPABLE OF HOVERING IN AIR Russian patent published in 2022 - IPC B64C27/32 B64C27/51 

FIELD: aviation.

SUBSTANCE: invention relates to the field of aviation, in particular to structures of main rotors. Main rotor (3) for an aircraft capable of hovering in the air contains sleeve (5) with the possibility of rotation around the axis (A) with a set of blades (9), shaft (6) with the possibility of connection to a drive element of aircraft (1) and functionally connected to sleeve (5) to bring sleeve (5) into rotational movement around the axis (A), and damping means (15’) to reduce the transmission of vibrations to shaft (6). The damping means contains mass (17) designed to oscillate in a plane perpendicular to the axis (A) in order to restrain bending vibrations of shaft (6) generated by the rotation of blades (9). Damping means (15) also contains elastic means (30) having the necessary rigidity along the axis (A) and functionally connected to mass (17’) to restrain the vibration of shaft (6) along the axis (A).

EFFECT: additional adjustment of the frequency of setting damping devices to the actual frequency of repetition of vibration pulses transmitted to the shaft is provided.

27 cl, 9 dwg