COAXIAL LOAD-BEARING SYSTEM Russian patent published in 2021 - IPC B64C27/54 B64C27/605 

FIELD: aviation.

SUBSTANCE: invention relates to aviation equipment, namely to structures of load-bearing systems of helicopters. The coaxial load-bearing system comprises a reduction gear (11) with two coaxially located shafts (10; 13) of opposite rotation, whereon heads (15) of main rotors (1; 2) are mounted. The heads consist of a torsion bar (16), a hub (17), adapters (18), units (19) for dynamic balancing of the propeller, and blade drivers (20). Two swash plates (3; 4) movable in the axial direction are kinematically connected with the blade control rods (22). Identical swashplates (3; 4) kinematically independent from each other are installed on sockets (10; 13) with a 180° turn. The heads (15) are attached to the shafts (10; 13) by means of a splined joint (12; 14). Each swashplate (3; 4) comprises a non-rotating ring (21) installed on a spherical slider (28), a rotating ring (23) connected with the non-rotating ring (21) by means of a rolling bearing (24), non-rotating spline-hinges (30) are installed on the non-rotating ring (21), attached to the upper and lower platforms (7; 8) whereon servo drives (27) are installed, connected with the non-rotating ring (21).

EFFECT: increased reliability of the coaxial load-bearing system of a helicopter, reduced total number of units and parts are achieved.

2 cl, 3 dwg