Coaxial lifting system

摘要

A reliable reduced weight coaxial lifting system includes a reducing gear with two shafts rotating in opposite directions, upper and lower rotor hubs mounted on the respective shafts and upper and lower swashplates connected to one another, which are movable in the axial direction and are kinematically linked to guides of blades positioned on the upper and lower rotor hubs. Guides of the blades are connected to the upper swashplate by rockers mounted on a slide block located above the upper rotor hub and guides of the blades of the lower rotor hub are connected by tie rods directly to the lower swashplate. The lower swashplate is connected to control systems of a collective and a cyclical pitch and the slide block is connected to a control system of a differential pitch of the upper rotor.

主权项

1. A coaxial lifting system, comprising:
a reducing gear with two shafts that rotate in opposite directions and on which are mounted an upper rotor hub and a lower rotor hub, respectively; and upper and lower swashplates connected to one another that are movable in the axial direction and are kinematically linked to guides of blades disposed on the upper rotor hub and the lower rotor hub; wherein the guides of the blades of the upper rotor hub are connected to the upper swashplate by rockers mounted on a slide block located above the upper rotor hub; wherein the guides of the blades of the lower rotor hub are connected by tie rods directly to the lower swashplate; wherein radii of the guides on the upper rotor hub are smaller than on the lower rotor hub; wherein the lower swashplate is connected to the control systems of a collective and a cyclical pitch by three tie rods; and wherein the slide block is connected to the control system of a differential pitch of the upper rotor by tie rod located inside the shaft of the upper rotor.