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

A degree of freedom, anti-resonance technology, applied in motor vehicles, shock absorbers, transportation and packaging, etc., can solve the problem of not meeting the special needs of the main damping installation structure for vibration isolation design, and can not 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

CN109204795AActive Publication Date: 2019-01-15SHANGHAI JIAO TONG UNIV
10 Cites 2 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-01-15

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

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 device comprises aload platform, a foundation platform, a plurality of upper connecting blocks, a plurality of lower connecting blocks and eight strut assemblies. The upper connecting blocks are uniformly distributed on that same circumference of the low end face of the load platform; the lower connecting blocks are evenly distributed on the same circumference of the upper end face of the foundation platform; eachstrut assembly is composed of a liquid elastic vibration isolator, one end of which is connected with an upper connecting block and the other end of which is connected with a lower connecting block. The invention blocks the transmission of the multi-directional rotor hub force with the frequency f=N omega to the body through the dynamic anti-resonance effect of the liquid elastic vibration isolator, the vibration isolation frequency can be stabilized at f=N omega. In addition, the eight strut assemblies can realize redundant vibration control, so the vibration isolation device has certain anti-crash performance.
Need to check novelty before this filing date? Find Prior Art

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 protection domain 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, strut assembly 3 is made of liquid elastic vibration isolator, and two ends are processed with first threaded hole 14, and ...