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An Automatic Rotor Folding System for Tandem Twin-rotor Helicopters

A folding system and helicopter technology, applied in the field of helicopters, can solve the problems of increasing the complexity of the control system and installation, complex rotor folding structure, and many electrical components, and achieves the effects of simple structure, few electronic control components, and easy installation and control.

Active Publication Date: 2022-04-26
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the folding structure of the rotor is relatively complicated, requiring the cooperation of the mechanical structure and the corresponding sensors to realize the folding of the rotor, the manufacturing cost is high, and there are many electrical components, which increases the complexity of the control system and installation

Method used

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  • An Automatic Rotor Folding System for Tandem Twin-rotor Helicopters
  • An Automatic Rotor Folding System for Tandem Twin-rotor Helicopters
  • An Automatic Rotor Folding System for Tandem Twin-rotor Helicopters

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Embodiment Construction

[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0052] see Figure 1-Figure 8 , the embodiment of the present invention discloses an automatic rotor folding system for a tandem dual-rotor helicopter, comprising:

[0053] A vertical shaft 1, the top of which is fixed with a propeller hub 2;

[0054] The paddle assembly 3, the paddle assembly 3 is a plurality, and is evenly distributed and hinged on the outer peripheral side of the hub 2;

[0055] Drive hydraulic cylinder 4, there are multiple drive hydraul...

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Abstract

The invention discloses an automatic rotor folding system for tandem dual-rotor helicopters, which comprises: a vertical shaft, the top of which is fixed with a propeller hub; a plurality of propeller blade assemblies, which are evenly distributed and hinged on the outer peripheral side of the propeller hub; A driving hydraulic cylinder, which is fixedly connected with a plurality of paddle hubs one by one, and the telescopic end of the driving hydraulic cylinder is fixedly connected with the root of the paddle assembly; a hydraulic oil tank, which is fixedly connected with the bottom end of the vertical shaft, and the internal space of the hydraulic oil tank It is a hydraulic oil chamber with an open bottom, and a piston assembly is arranged in the hydraulic oil chamber; a plurality of hydraulic oil delivery pipes, one end of which communicates with the top of the hydraulic oil chamber, and the other end is connected with the cylinder barrel of the driving hydraulic cylinder; the electric push rod , the telescopic end of which abuts against the bottom of the piston assembly. The folding system realizes blade folding through electric push rods, hydraulic oil tanks, and driving hydraulic cylinders. It has a simple structure, low manufacturing cost, fewer electronic control components, and is easy to install and control.

Description

technical field [0001] The invention relates to the technical field of helicopters, in particular to an automatic rotor folding system for tandem twin-rotor helicopters. Background technique [0002] The rotor system in the tandem dual-rotor helicopter is two pairs of rotors arranged in tandem, front and rear, and turning to the opposite direction. For heavy-duty helicopters, the arrangement of tandem dual-rotors is conducive to reducing the weight of the main reducer and rotors. At the same time, the volume of the cargo compartment can be further expanded, making it possible to load large cargo. However, the tandem dual-rotor design will cause problems such as excessive space occupied by the propellers. [0003] In order to reduce the space occupied by the blades of existing helicopters, the blades are generally designed to be foldable, that is, when the helicopter is not in use, the blades can be folded and stowed to reduce the space occupation rate. When the helicopter ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B64C27/50B64C27/08
CPCB64C27/50B64C27/08
Inventor 周航霄柯瑞奇蔡天歆田志明钱春颖贺天鹏
Owner BEIHANG UNIV
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