Main drive system of a coaxial twin-rotor helicopter

Abstract

The invention discloses a main transmission system of a coaxial double-rotor helicopter, which comprises a lower rotor transmission system and an upper rotor transmission system. The lower rotor transmission system includes the lower rotor hub, the lower rotor shaft and the lower rotor hub joint, and the upper rotor transmission system includes the upper rotor hub, the upper rotor shaft and the upper rotor hub joint. The output flange of the main rotor reducer transmits the power to the lower rotor shaft through the elastic coupling, the lower rotor torque balance, the elastic coupling and the inner spline 1, and the lower rotor shaft cooperates with the lower rotor hub for output. At the same time, the output flange of the main rotor reducer transmits power to the upper rotor shaft through the elastic coupling, the upper rotor torque balance, the elastic coupling and the inner spline 2, and the upper rotor shaft cooperates with the upper rotor hub and drives the upper rotor to move . The transmission system can simultaneously drive the upper rotor and the lower rotor to move, and maintain the same and reverse rotation speed. The transmission system has the advantages of reliability, safety, simple design and adjustable structure.

Description

A coaxial twin-rotor helicopter main drive system technical field The present invention relates to helicopter transmission field, be specifically related to a kind of coaxial double rotor helicopter main transmission system. Background technique Compared with the single-rotor helicopter, the helicopter adopts the coaxial double-rotor layout, and the rotor length and rotation area are more Small, the rotor radius is also greatly reduced. The dual-rotor layout makes the helicopter structure more compact, while the structural mass and load are divided into The cloth is more concentrated at the center of gravity, which reduces the moment of inertia of the helicopter, making it safer, more maneuverable and more maneuverable. [0003] But the air flow between the rotors of the coaxial twin rotors interferes with each other, and there is a higher requirement for the spacing between the rotors. same When the dual-rotor transmission is adopted, the transmission system of the ...

AI Technical Summary

Problems solved by technology

[0003] However, the airflow between the rotors of the coaxial dual rotor interferes with each other, and there are higher requirements for the distance between the rotors

At the same time, with the dual-rotor transmission, the transmission system of the helicopter is more complicated, the mass increases, and its reliability decreases.

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