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Simple rotor mechanism of coaxial dual-rotor helicopter test stand

A technology of coaxial twin-rotors and helicopters, applied in aircraft component testing, machine/structural component testing, aircraft parts, etc., can solve problems such as cumbersome mechanisms, achieve easy replacement, reduce processing difficulty, and simple and effective structure

Inactive Publication Date: 2015-09-16
BEIHANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This adds a lot of small pull rods and transitional rocker arms to the rotor control mechanism, making the mechanism too cumbersome

Method used

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  • Simple rotor mechanism of coaxial dual-rotor helicopter test stand
  • Simple rotor mechanism of coaxial dual-rotor helicopter test stand
  • Simple rotor mechanism of coaxial dual-rotor helicopter test stand

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Embodiment Construction

[0024] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0025] In the description of the present invention, it should be noted that, unless otherwise stated, the meaning of "plurality" is two or more; The orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be configured in a specific orientation, and operation, and therefore should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, ...

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Abstract

The invention relates to a simple rotor mechanism of a coaxial dual-rotor helicopter test stand. The rotor mechanism comprises an inner shaft, an outer shaft, an actuator group, a lower control system, an upper control system, an upper rotor propeller hub and a lower rotor propeller hub, wherein the upper rotor propeller hub comprises a first propeller hub seat, and a first paddle arm arranged on the first propeller hub seat in a full articulation manner; the lower rotor propeller hub comprises a second propeller hub seat and a second paddle arm arranged on the second propeller hub seat in a full articulation manner; the upper control system is connected with the first paddle arm; the lower control system is connected with the second paddle arm; the upper control system is connected with the lower control system via an intermediate draw bar; and the actuator group is connected with the lower control system to control synchronous motion of the first paddle arm and the second paddle arm. The mechanism can achieve collective pitch control and cyclic pitch change of coaxial dual rotors, and effectively achieves various dynamic tests of the helicopter such as upper and lower rotor aerodynamic characteristics of the coaxial dual rotors, dynamic stability of the rotors, and moving part loads of the rotors.

Description

technical field [0001] The invention relates to the field of helicopter comprehensive tests, in particular to a simple coaxial double-rotor helicopter test bench rotor mechanism. Background technique [0002] Compared with single-rotor helicopters with tail rotors, the biggest feature of coaxial dual-rotor helicopters is that they rely on the reverse rotation of the upper and lower rotors to balance the torque, so the tail rotor is no longer needed. From the overall structure, because there is no tail rotor, there is no need for an overly long tail beam and a complicated transmission system, which eliminates the hidden danger of tail rotor failure in single-rotor helicopters and the tail rotor caused by vibration deformation in the tail beam during flight. The potential failure of the transmission mechanism is eliminated, thereby improving the survivability of the helicopter. In terms of aerodynamic characteristics, the coaxial dual-rotor helicopter has two rotors to genera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64F5/00G01M1/06B64F5/60
Inventor 安强林李书尚红星洪永军贺天鹏王燕
Owner BEIHANG UNIV
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