HELICOPTER TAIL ROTOR Russian patent published in 2023 - IPC B64C27/78 B64C27/82 

FIELD: aviation,

SUBSTANCE: invention relates to the designs of helicopters. The tail rotor (4) contains a main rotor shaft (6) rotating around the first axis (A), a group of blades (8) rotating around the second axes (B), an element (16) configured to slide along the first axis (A), rotating in one piece with the shaft (6) of the rotor and connected to the blades (8), the control rod (10), made with the ability to slide along the axis (A), the first bearing (17) and the locking element (55). The first bearing contains the first ring (30), rotating in one piece with the element (16), the second ring (31), radially inner to the first ring (30), a group of rolling bodies (32), the third ring (50), sliding in one complete with a control rod (10) along the axis (A) and fixed at an angle to the axis (A). The locking element (55) is located in the standard configuration, in which it prevents the relative rotation of the second and third rings (31, 50), and in the emergency configuration, in which it sets the second ring (31) in free rotation in relation to the third ring (50) when the first bearing (17) is in a fault state.

EFFECT: timely detection of failure of the rolling bearing, proper control of the tail rotor in the event of a failure of the bearing.

81 cl, 17 dwg