Adaptive Variable Stiffness Linear Magnetic Fluid Damping Shock Absorber

A technology of magnetic liquid and variable stiffness, which is applied in the direction of liquid shock absorbers, shock absorbers, shock absorbers, etc., and can solve the problems of limited vibration damping effect and poor adaptability

Inactive Publication Date: 2017-05-17
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the common external vibration is uncertain, and its vibration frequency changes randomly, which makes the common magnetic liquid damper with fixed frequency poor adaptability, and the corresponding vibration reduction effect is limited

Method used

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  • Adaptive Variable Stiffness Linear Magnetic Fluid Damping Shock Absorber
  • Adaptive Variable Stiffness Linear Magnetic Fluid Damping Shock Absorber

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with accompanying drawing:

[0016] The shock absorber is an adaptive variable stiffness linear magnetic liquid damping shock absorber, and its structural sectional view is shown in figure 1 As shown, its structure includes: end cap 1, conduit 2, columnar permanent magnet 3, magnetic liquid 4, induction coil 5, energy management circuit 6, excitation coil 7, armature 8, fixed plate 9;

[0017] The adaptability of the shock absorber is mainly realized by the excitation coil 7 located outside the conduit 2. The excitation coil 7 and the conduit 2 are rigidly connected through the fixed plate 9. The axes of the two are flat, and the excitation coil 7 is specially designed to increase the intensity of the induced magnetic field. A columnar armature 8 is placed in the middle, and the armature 8 is coaxial with the excitation coil 7 . The electric energy of the excitation coil 7 comes from the induction coi...

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Abstract

The invention relates to an adaptive variable-stiffness linear magnetic liquid damping vibration absorber and belongs to the field of engineering vibration. The vibration absorber mainly comprises a column permanent magnet serving as an inertia mass block, a magnetic reed structure and damping. Magnetic field attraction of the column permanent mass block and a magnet exciting coil drives the magnetic reed structure to generate restoring force. An induction coil arranged outside the middle of a round tube collects the external vibration energy and supports the electric energy collected to the magnet exciting coil in real time, accordingly regulating the stiffness of the magnetic reed. The damping of the vibration absorber is composed of electromagnetic damping of the induction coil and viscous damping of the magnetic liquid. By adjusting inherent frequency of a magnetic reed stiffness adjusting system to close to the vibration frequency of an exciting source, relative displacement of the inertia mass block and the wall is increased, collecting energy and damping are improved, and vibration absorption is strengthened. The adaptive variable-stiffness linear magnetic liquid damping vibration absorber is simple in design and good in vibration absorption.

Description

technical field [0001] The invention relates to an adaptive variable stiffness linear magnetic liquid damping shock absorber. The shock absorber is a passive damping vibration reduction system and belongs to the field of mechanical engineering vibration. Background technique [0002] The magnetic liquid is a stable colloidal suspension formed by dispersing nano-ferromagnetic or ferrimagnetic particles coated with surfactants in the liquid carrier liquid. The second-order buoyancy principle of the magnetic liquid means that the magnetic liquid can be immersed in it. A permanent magnet with a specific gravity larger than itself is suspended. The magnetic fluid can be regarded as a self-help lubricant, which can move with the permanent magnet. The permanent magnet is suspended without energy consumption, and the movement process is affected by low friction. In this way, the permanent magnet adsorbed with the magnetic liquid has higher sensitivity to the response of the inertia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16F9/10F16F9/53
CPCF16F9/103F16F9/535
Inventor 王四棋李德才
Owner BEIJING JIAOTONG UNIV
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