Coaxial dual-rotor helicopter

A helicopter and twin-rotor technology, which is applied in the field of aviation aircraft, can solve the problems of complex control mechanism of coaxial twin-rotor helicopters, limit the maximum level flight speed of the helicopter, and large waste resistance area, and achieve simple structure, improved lifting power, waste The effect of small resistance area

Inactive Publication Date: 2012-06-13
李杏健
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main disadvantage of the coaxial twin-rotor helicopter is the complicated control mechanism
Moreover, due to the asymmetric lift generated by the forward and backward blades during flight, the rotation planes of

Method used

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  • Coaxial dual-rotor helicopter
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  • Coaxial dual-rotor helicopter

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[0024] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, through the description of the embodiments, to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solutions of the present invention.

[0025] like figure 1 , figure 2 and image 3 The expressed structure of the present invention is a coaxial twin-rotor helicopter, comprising a rotor shaft mounted on the upper part of the fuselage, the rotor shaft comprising an outer rotating shaft 1 and an inner rotating shaft 2, and an upper rotor is arranged on the rotor shaft 3 and the lower rotor 4, the inner shaft 2 and the outer shaft 1 are connected to each other through bearings, the upper rotor 3 is installed on the inner shaft 2, and the lower rotor 4 is installed on the outer on reel 1.

[0026] Since a considerable part of the torque generated by the lower r...

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Abstract

The invention discloses a coaxial dual-rotor helicopter, which includes a rotor shaft mounted at the upper part of a helicopter body and including an outer rotating shaft and an inner rotating shaft. An upper rotor and a lower rotor are arranged on the rotor shaft; the inner rotating shaft and the outer rotating shaft are connected mutually through a bearing; the upper rotor is mounted on the inner rotating shaft; the lower rotor is mounted on the outer rotating shaft; and the lengths of blades on the upper rotor are smaller than that of blades on the lower rotor. The upper rotor is provided with four blades; and the lower rotor is provided with three blades. Due to the adoption of the technical scheme, the structure is simple; the lengths, the number, the rotating speed and the material of the blades on the upper rotor are improved substantively, so that the structure is simple to operate, and the risk of blade collision caused by upper and lower rotor interference can be avoided; and meanwhile, two rotors have smaller parasite area, thereby improving the ascending power, the maximum level speed and the combination properties of the helicopter.

Description

technical field [0001] The invention belongs to the technical field of aviation aircraft and relates to the technology of helicopters, more specifically, the invention relates to a coaxial double-rotor helicopter. Background technique [0002] Helicopter is a kind of aircraft that generates lift and propulsion by rotor and flies. Compared with fixed-wing aircraft, its important feature is that helicopter can realize hovering in the air. There are two main types of single-rotor helicopters and twin-rotor helicopters: [0003] Single-rotor helicopters generally use a tail rotor to counteract the reactive torque generated by the main rotor. A prominent problem of single-rotor helicopters with tail rotors is their own instability. Single-rotor helicopters have a large moment of inertia around the rotor axis, and generally rely entirely on the tail rotor to balance the reaction torque. The tail rotor is the biggest challenge to the flight safety of single-rotor helicopters. If...

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Application Information

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IPC IPC(8): B64C27/10B64C27/72B64C27/14B64C27/82
Inventor 李杏健李强李杏康
Owner 李杏健
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