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Adaptive Variable Stiffness Planar Magnetic Fluid Damping Shock Absorber

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

Inactive Publication Date: 2017-01-04
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 Planar Magnetic Fluid Damping Shock Absorber
  • Adaptive Variable Stiffness Planar Magnetic Fluid Damping Shock Absorber

Examples

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with accompanying drawing:

[0017] A cross-sectional view of the shock absorber is shown in figure 1 As shown, it includes: a housing 1 , an end cover 2 , an induction coil 3 , a magnetic liquid 4 , a cylindrical permanent magnet 5 , an energy management circuit 6 , a hollow cylinder 7 , an armature 8 , and an excitation coil 9 .

[0018] The cylindrical permanent magnet 5 adsorbed with the magnetic liquid 4 is axially and vertically placed in the casing 1, and the magnetic liquid 4 generates magnetic pressure under the action of the magnetic field gradient to suspend the cylindrical permanent magnet 5, thereby reducing the contact between the cylindrical permanent magnet 5 and the casing. The contact friction between the bottom surfaces of the body 1 improves the sensitivity of the inertial mass to the vibration response. There is a stepped cylinder on the inner side of the end cover 2, and an induc...

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Abstract

The invention relates to a self-adaptation variable rigidity plane magnetic liquid damping shock absorber and belongs to the field of mechanical engineering vibration. The shock absorber is capable of responding to external vibration and transforming part of vibration energy into electric energy, the electric energy is then transformed into magnetic energy, and the adaptation adjustment of the rigidity of a magnetic spring is achieved. A cylindrical permanent magnet with magnetic liquid attracted to the end face is adopted in the shock absorber to serve as an inertia mass block, a magnetic spring structure formed by a magnetic exciting coil and the cylindrical permanent magnet is used for providing restoring force for the inertia mass block, and thus the inertia mass block is made to respond to the external vibration and move in the plane to consume energy. The magnetic attraction force of the magnetic exciting coil acting on the cylindrical permanent magnet is controlled by the real-time collected energy of the magnetic exciting coil on the external vibration, the rigidity of the magnetic spring is changed in a self-adaptation mode, and thus the inherent frequency of the shock absorber is made to change along with the external vibration and be close to the frequency of the external vibration gradually. The shock absorber is capable of achieving the variable rigidity self-adaptation in the vibration damping process and good in vibration damping performance.

Description

technical field [0001] The invention relates to an adaptive variable stiffness plane magnetic liquid damping shock absorber, which belongs to the field of mechanical engineering vibration. Background technique [0002] The vibration pickup system used in the common passive damping and vibration reduction system is mainly composed of springs and inertial mass mechanically connected, which makes it show poor fatigue resistance and high noise; another vibration pickup system uses magnetic springs instead Mechanical spring, in order to increase the structural stability of the magnetic spring structure, it is usually necessary to add a guiding device for the inertial mass block, such as a guide rod, a sleeve, etc., which will increase the friction between the permanent magnet and the guiding device and reduce its vibration pickup performance . [0003] Magnetic liquid is a stable colloidal suspension formed by dispersing nano-magnetic or sub-magnetic particles coated with surfac...

Claims

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Application Information

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