MAIN ROTOR OF ROTARY-WINGED AIRCRAFT Russian patent published in 2014 - IPC B64C27/32 B64C11/06 

FIELD: aviation.

SUBSTANCE: main rotor of rotary-winged aircraft mounted on the propeller shaft, comprises blades, a hub with sleeves, radial rotating bearings, axial hinge shaft, an intermediate part made in the form of a tube having a collar, an opening, a lever, a torsion bar fixed by the pin through the opening in the intermediate part, and a leash of controlling the blade which is inside the propeller shaft. The axial hinge shaft is a rod of variable cross section with a longitudinal opening, connected through the radial rotating bearings with the hub. The longitudinal opening of the axial hinge shaft is made in the form cylindrical surfaces of different diameters turning into each other and eccentrically located relative to each other, interacting with the blade shank. The blade shank has a longitudinal opening of the rectangular cross-section turning into the opening with a circular cross-section, on which border there is a groove, which axis makes with the axis of rectangular cross-section of the opening in the blade shank the angle of 90°.

EFFECT: extension of lifetime and reliability of the main rotor of the rotary-winged aircraft.

5 dwg