An eight-strut type multi-degree-of-freedom dynamic anti-resonance vibration isolation device

A degree of freedom, anti-resonance technology, applied in shock absorbers, motor vehicles, transportation and packaging, etc., can solve the problem of not meeting the special needs of the vibration isolation design of the main reducer installation structure, and the inability to effectively block the multi-directional rotor hub force transmission. and other problems, to achieve the effect of redundant vibration control, stable vibration isolation frequency, and large static bearing capacity

CN109204795BActive Publication Date: 2022-01-11SHANGHAI JIAO TONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2022-01-11

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Abstract

The invention provides an eight-strut type multi-degree-of-freedom dynamic anti-resonance vibration isolation device, which belongs to the field of helicopter vibration control. The invention includes a load platform, a foundation platform, a plurality of upper connection blocks, a plurality of lower connection blocks and eight brace assemblies. The upper connection blocks are evenly distributed on the same circumference of the lower end surface of the load platform; the lower connection blocks are evenly distributed on the same circumference of the upper end surface of the foundation platform; Connect with the lower connection block. The invention uses the dynamic anti-resonance effect of the liquid-elastic vibration isolator to block the force transmission of the multi-directional rotor hub with a frequency of f=NΩ to the body, and can realize the six-degree-of-freedom vibration isolation of the main reducer of the helicopter, and the vibration isolation frequency is stable at f =NΩ, in addition, because the eight-strut assembly can realize redundant vibration control, the vibration isolation device has a certain anti-crash performance.
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Description

technical field

[0001] The invention relates to an eight-strut type multi-degree-of-freedom dynamic anti-resonance vibration isolation device, which belongs to the field of helicopter vibration control. Background technique

[0002] During the flight of the helicopter, the rotor is subjected to aerodynamic loads to form a multi-directional rotor hub force with frequency f=NΩ, where N and Ω are the number of blades and the rotor speed, respectively. The rotor hub force is transmitted to the helicopter body through the rotor shaft, main reducer and main reducer installation structure, causing strong vibration of the body, affecting the combat effectiveness of weapons and equipment, and reducing ride comfort. The purpose of the vibration isolation design for the main reducer installation structure is to block the transmission of the multi-directional rotor hub force with frequency f=NΩ to the body, thereby reducing the vibration level of the helicopter body.

[0003] In order ...

Examples

Embodiment Construction

[0035] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0036] Such as Figure 1-8 As shown, the present invention discloses an embodiment of an eight-strut type multi-degree-of-freedom dynamic anti-resonance vibration isolation device, including a load platform 5, a foundation platform 1, four first-type upper connection blocks 6 and two second-type upper connections Block 4, 4 lower connection blocks 2 and 8 strut assemblies 3. Wherein, the strut assembly 3 is composed of a liquid-elastic vibration isolator, and a first threaded hole 14 is processed at bo...