DEVICE FOR PROXIMITY PREVENTION OF ROTOR BLADES OF COAXIAL HELICOPTER Russian patent published in 2022 - IPC B64C27/10 B64C27/32 B64C27/58 

FIELD: aeronautical engineering.

SUBSTANCE: invention relates to aeronautical engineering, in particular to the structures of coaxial bearing systems of rotary-wing aircraft. A column of coaxial rotors with a mirror arrangement of swashplates contains a gearbox with two coaxial hollow shafts rotating in opposite directions, on which the bushings of the rotors are fixed, control circuits for the common, differential and cyclic pitch of each screw, two swashplates. There is a hollow fixed column inside the rotating shaft of the upper screw, and cyclic pitch control rods pass inside the column. In the upper part of the column, a lower screw swashplate is installed, and its sliding ring is connected by a rod with an additional sliding ring installed in the lower part of the column. A sliding rod between the swashplates in the roll channel was introduced into the control structure of the column of coaxial rotors, changing its length depending on the flight mode of the rotorcraft.

EFFECT: increased safety by preventing the dangerous convergence of the blades of the upper and lower rotors.

1 cl, 2 dwg