Coaxial helicopter rotor mechanism

Abstract

The invention provides a coaxial helicopter rotor mechanism which is mainly characterized in that an upper group of mixed connecting mechanisms and a lower group of mixed connecting mechanisms are symmetrical relative to a horizontal central platform and are fixedly connected to the horizontal central platform; each group of mixed connecting mechanism consists of an upper parallel connection mechanism and a lower parallel connection mechanism; the mechanisms adjacent to the central platform are fixed ring mechanisms and are connected with movable ring mechanisms by virtue of rolling bearings; each movable ring mechanism is provided with three SPS branches and one RRS branch, one ends of the branches are respectively connected with a rotor and a rotor transmission ring, and the other ends of the branches are connected with a rotating platform; the rotating platform is connected with an oscillating platform by virtue of a rolling bearing; the oscillating platform is sheathed outside a middle shaft and a ball socket bearing; each fixed ring mechanism is also provided with one RRS branch and three SPS branches, and the branches are respectively connected with the peripheries of the oscillating platform and a fixed platform; the fixed platform is sheathed outside a middle shaft sleeve and is fixedly connected with the central platform. The coaxial helicopter rotor mechanism is small in volume and low in energy consumption; because two movable rings rotating in reverse directions are not needed, the service life is prolonged; due to the global symmetry, the stability during high-speed rotation is high.

Description

Technical field [0001] The invention relates to a rotor mechanism of a helicopter. Background technique [0002] In the traditional coaxial helicopter rotor mechanism, two rotors are arranged up and down, there is no tail rotor, the length of the fuselage is shortened, and the body parts can be compactly arranged in the center of gravity of the helicopter. The main components include two upper and lower automatic tilters, anti-torsion arm, variable pitch rod and control steering gear, etc. The two rotary wing mechanisms are symmetrical up and down, with opposite rotation directions. There is no fixed central platform in the middle. Instead, two swing platforms are connected in parallel. On the swing platform is a rotating platform or a moving ring mechanism, and the rotary wing is fixed on the rotary wing transmission ring. Its disadvantage is that the rotor rotates in opposite directions on the same axis. There are moving rings with opposite rotation directions, which are worn...

AI Technical Summary

Problems solved by technology

Its disadvantage is that the rotors rotate in opposite directions on the same axis

There are moving rings that rotate in opposite directions, with greater wear, short life, high energy consumption, and often poor symmetry

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