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Composite semi-active ultralow-frequency vibration isolating device

A semi-active, ultra-low frequency technology, used in shock absorbers, vibration suppression adjustment, springs, etc., to solve problems such as short working stroke and complex structure

Inactive Publication Date: 2016-07-20
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of pseudo-zero stiffness device requires precise design, complex structure and short working stroke

Method used

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  • Composite semi-active ultralow-frequency vibration isolating device

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Embodiment Construction

[0019] The design idea of ​​the present invention is illustrated below by accompanying drawings.

[0020] Such as figure 1 As shown, in this embodiment, 1 is an external vibration source, and 2 is a connecting plate with a threaded hole in the middle for connecting with the piston rod 4 in the inerter. A centering spring 3 is arranged in the inertial container. The working medium in the inerter is magnetorheological fluid. The upper and lower cavities in the inerter are connected by an external pipeline. The external pipeline is divided into two parts. The left pipeline is arranged in a straight line, and the right pipeline is In a spiral arrangement, the two external pipelines are respectively connected with a magnetically controlled throttle valve 5 .

[0021] In this embodiment, the lower end of the piston rod 4 goes deep into the hydraulic buffer device 9, and the hydraulic buffer device 9 is filled with hydraulic oil of a certain pressure, and communicates with the exte...

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Abstract

The invention discloses a composite semi-active ultralow-frequency vibration isolating device. The composite semi-active ultralow-frequency vibration isolating device is mainly composed of a connecting plate, an inerter, hydraulic buffer devices, shape memory alloy springs, movable films, adjusting screws and other components. According to the ultralow-frequency vibration isolating device, the apparent mass of a system is increased through the hydraulic inerter, a quasi-zero stiffness characteristic is provided for the system based on the hydraulic buffer theory, the hydraulic inerter and the quasi-zero stiffness characteristic are organically combined, and therefore the effect of ultralow-frequency vibration isolating is achieved.

Description

technical field [0001] The invention relates to a composite semi-active ultra-low frequency vibration isolation device, more precisely, relates to an ultra-low frequency vibration isolation device which combines an inerter based on magneto-rheological fluid and a quasi-zero stiffness structure. Background technique [0002] Low-frequency vibration is very harmful to aerospace and military equipment, and low-frequency vibration poses a challenge to general passive vibration isolation technology. Ordinary rubber vibration isolation can effectively isolate vibrations with a frequency above 5-6Hz, but it cannot achieve its vibration isolation effect for low-frequency vibrations below 1-2Hz. [0003] Due to its simple structure, high reliability and easy maintenance, passive vibration isolation has broad application prospects, and has been widely used in isolation and suppression of various vibration sources. Natural frequency of linear vibration isolation system , m is the sy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16F15/023F16F9/096F16F9/512
CPCF16F9/096F16F9/512F16F15/022F16F15/0237F16F15/0275
Inventor 王林翔吴庭栾宇
Owner ZHEJIANG UNIV
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