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Vibration reducing device for helicopter rotor blade

A technology of helicopter rotors and blades, which is applied in the field of helicopters, can solve the problems of increasing the weight of the body, achieve the effect of enhancing the vibration absorption effect and suppressing the waving vibration

Inactive Publication Date: 2016-11-09
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

If the method of installing a vibration isolator between the final reducer and the body is adopted, the weight of the body will be greatly increased

Method used

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  • Vibration reducing device for helicopter rotor blade
  • Vibration reducing device for helicopter rotor blade
  • Vibration reducing device for helicopter rotor blade

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Embodiment Construction

[0017] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Hereinafter, embodiments of the present invention will be described in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0018] Those skilled in the art can understand that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It should als...

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Abstract

The embodiment of the invention discloses a vibration reducing device for a helicopter rotor blade, and relates to the technical field of helicopters. The vibration reducing device for the helicopter rotor blade comprises blade girders (1), a shock absorption device (2), bolts (3) and nuts (4), and is characterized in that the shock absorption device (2) is fixed inside the blade girders (1) through the bolts (3) and the nuts (4). The tuned mass of the shock absorption device plays a role in amplifying movement of a main mass block, the shock absorption device is installed at the blade tip position and can generate the highest torque to the root of the blade, the shock absorption effect is enhanced, and accordingly the waving vibration level of the blade can be effectively reduced.

Description

technical field [0001] The invention relates to the technical field of helicopters, in particular to a vibration reducing device for helicopter rotor blades. Background technique [0002] Due to the presence of aerodynamic damping, the helicopter rotor blades do not need dampers in the waving direction to increase the damping of the system. But for a coaxial twin-rotor helicopter, the waving vibration of the blades will cause the helicopter to collide with the upper and lower blades. In order to avoid this problem, there are two main methods currently adopted, one is to increase the distance between the upper and lower rotors, which means increasing the length of the rotor shaft and the weight of the propeller hub; the second is to use a more rigid material Make the paddle, but this will greatly increase the weight of the paddle. For a rotor with K blades, the nkΩ order vibration caused by flapping vibration will be transmitted to the fuselage through the hub, increasing t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64C27/00B64C27/473
CPCB64C27/001B64C27/473
Inventor 韩东陈俊伟马胜明
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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