Automatic rotor wing folding system for tandem double-rotor-wing helicopter

A folding system and helicopter technology, applied in the field of helicopters, can solve the problems of many electrical components, complicated rotor folding structure, increased control system and installation complexity, etc.

Active Publication Date: 2021-06-08
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 t

Method used

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  • Automatic rotor wing folding system for tandem double-rotor-wing helicopter
  • Automatic rotor wing folding system for tandem double-rotor-wing helicopter
  • Automatic rotor wing folding system for tandem double-rotor-wing helicopter

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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 wing folding system for a tandem dual-rotor wing helicopter; the system comprises a vertical rotating shaft having the top fixed with propeller hubs, a plurality of blade assemblies uniformly distributed and hinged to the peripheral side of the propeller hub, multiple driving hydraulic cylinders fixedly connected with the multiple propeller hubs in a one-to-one correspondence mode, and having telescopic ends fixedly connected with the roots of the blade assemblies, a hydraulic oil tank fixedly connected with the bottom end of the vertical rotating shaft, having the internal space being a hydraulic oil cavity with an open bottom end, and internally provided with a piston assembly, a plurality of hydraulic oil conveying pipes having one ends communicated with the top end of the hydraulic oil cavity, and the other ends connected with a cylinder barrel of the driving hydraulic cylinder, and anelectric push rod having the telescopic end abutted against the bottom of the piston assembly. The folding system realizes folding of the paddle through the electric push rod, the hydraulic oil tank and the driving hydraulic cylinder, and is simple in structure, low in manufacturing cost, few in electric control element and easy to mount 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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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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