Helicopter rotary electric direct drive variable pitch tail rotor assembly and helicopter

Abstract

The invention discloses a helicopter rotary electric direct-drive variable-pitch tail rotor assembly and the helicopter, comprising a tail rotor blade assembly, a tail rotor rotor shaft for driving the tail rotor blade assembly to rotate, and a tail rotor rotor shaft for driving the tail rotor blade assembly. A rotating tail rotor motor and a pitch-changing mechanism, the pitch-changing mechanism includes a pitch-changing disk that can slide axially along the tail-rotor rotor shaft and is fitted with the tail-rotor shaft in transmission, The pitch disc is used to drive the pitch-variable sleeve for sliding the pitch-variable disc and the driving assembly for driving the pitch-variable sleeve to slide axially along the tail rotor rotor shaft. A transmission rod is arranged between the pitch-variable disc and the blade assembly. The invention not only can realize the variable pitch of the tail rotor through the variable pitch disc, but also can realize the torque transmission to the rotor shaft of the tail rotor through the variable pitch disc, prolonging the service life of the bearing and other components.

Description

technical field [0001] The invention relates to the field of helicopters, in particular to a helicopter rotary electric direct-drive variable-pitch tail rotor assembly. Background technique [0002] The helicopter tail rotor is used to balance the anti-torque and to control the helicopter's heading. The rotating tail rotor is equivalent to a vertical stabilizer, which can stabilize the heading of the helicopter. Although the function of the tail rotor is different from that of the rotor, they both generate aerodynamic force by rotation and work in an asymmetric airflow during forward flight. Therefore, the structure of the tail rotor has many similarities with the rotor structure. At present, the structural forms of the tail rotor mainly include the seesaw type, the universal joint type, the articulated type, the bearingless type, and the "ducted tail rotor" type. [0003] A conventional tail rotor is usually composed of a tail rotor blade, a tail rotor hub and a pitch-cha...

AI Technical Summary

Problems solved by technology

The direct result of such a design is that its structural weight increases, and too many transmission joints will reduce the reliability of the transmission; at the same time, the rotor shaft in the prior art transmits torque through the variable pitch rod, which reduces the service life of the rod and the bearing

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