MAIN REDUCTION GEAR OF HELICOPTER Russian patent published in 2017 - IPC B64C27/12 

FIELD: mechanical engineering.

SUBSTANCE: invention is relevant to mechanical engineering, namely, to the main four-stage non-planetary reduction gear of helicopter. Helicopter reduction gear is provided with two transmission paths of torque supplied by two driving engines (1) to joint driven wheel (2) for shaft drive (3) of rotor and to joint driven wheel (4) for shaft drive (5) of anti-torque tail rotor. Each of lines provides four stage of reduction. Driving gear (13) of the third stage placed on the third shaft (12), the first pair of driven wheels (14) of the third stage engaged with the said gear (13) and the second pair of driven wheels (14) of the third stage connected to the first pair with the aid of idler gears (16) are mounted on the third stage of reduction. Four driving gears (17) of the fourth stage mounted on shafts (15) of rotation of driven wheels (14) of the third stage and engaged with joint driven wheel (2) of rotor shaft (3) is provided for on the fourth reduction stage. The second shaft (9) of each mentioned lines is linked with drive (22) of helicopter accessory gear-box. Moreover, driving gear (18) for shaft drive is mounted on the second shaft (9).

EFFECT: invention decreases reduction-gear weight as well as reduces degradation of rolling bearings of shafts.

4 cl, 1 dwg, 1 tbl