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A magnetorheological damper with built-in magnetorheological valve for damping performance control

A magnetorheological damper, magnetorheological valve technology, applied in the direction of shock absorber, shock absorber, liquid shock absorber, etc., can solve the problem of increasing effective damping gap, failure of magnetorheological damper, increase in manufacturing cost, etc. problems, to achieve the effect of wide dynamic adjustment range, enhanced yield stress, and increased shear area

Active Publication Date: 2017-07-04
EAST CHINA JIAOTONG UNIVERSITY
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

A common method is to reduce the width of the damping gap of the magnetorheological damper. However, when the magnetorheological fluid is left unused for a long time and is used again, particles are prone to precipitate and block the damping gap, resulting in the failure of the magnetorheological damper.
The second is to increase the length of the effective damping gap, but this will significantly increase the volume of the magnetorheological damper, occupy more installation and use space, and increase the manufacturing cost accordingly
[0007] Based on this, in the actual design process, it is difficult to simultaneously increase the magnetic induction intensity in the effective damping gap and increase the length of the effective damping gap

Method used

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  • A magnetorheological damper with built-in magnetorheological valve for damping performance control
  • A magnetorheological damper with built-in magnetorheological valve for damping performance control
  • A magnetorheological damper with built-in magnetorheological valve for damping performance control

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the drawings and embodiments:

[0022] Such as figure 1 As shown, the present invention includes: left lifting lug 1, piston rod 2, piston cylinder 3, left end cover 4, screw I5, excitation coil 6, damper cylinder 7, floating piston 8, right end cover 9, right lifting lug 10, Screw Ⅱ11, compressed air cavity 12, magnetorheological fluid cavity I13, cylinder fluid flow channel 14, valve core 15, U-shaped fluid flow channel 16, magnetorheological fluid cavity II 17, piston head 18, gas cavity Ⅰ19 and gas chamber Ⅱ20.

[0023] figure 2 It is a schematic diagram of the structure of the damper cylinder of the present invention, and 21 in the figure is the end cover of the damper cylinder 7.

[0024] image 3 Yes figure 2 A-A sectional view of the damper cylinder, in the figure 22 is a waist-shaped through-hole groove, and 23 is a circular groove. The end cover of the damper cylinder 7 is machined with 4 w...

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Abstract

The invention discloses a magneto-rheological damper with a built-in magneto-rheological valve for damping performance control. The piston cylinder, the damper cylinder body, the valve core, the excitation coil, the liquid flow channel of the cylinder body and the U-shaped liquid flow channel form a built-in magneto-rheological valve. When the excitation coil conducts electricity, the fluidity of the magnetorheological fluid in the effective damping gap between the liquid flow channel of the cylinder body and the U-shaped liquid flow channel decreases due to the electromagnetic effect. A pressure difference will be formed to change the damping force on the right end surface of the piston head, so that the purpose of the magnetorheological valve to control the damping performance of the magnetorheological damper is realized. The U-shaped liquid flow channel effectively increases the damping length, thereby increasing the adjustable range of the damping force. The magneto-rheological damper has a large adjustment range of damping force, a compact structure and a small volume, and is especially suitable for vibration-reduction and anti-seismic systems of railways, locomotives, bridges, and the like.

Description

Technical field [0001] The invention relates to a magnetorheological damper, in particular to a magnetorheological damper with a built-in magnetorheological valve for damping performance control. Background technique [0002] Magnetorheological damper is a new type of intelligent damping device widely used in semi-active control systems. Its characteristics of millisecond response speed, large control range and large damping force output make it an excellent semi-active actuator in industrial applications. At present, magnetorheological dampers have been widely used in vibration reduction and anti-seismic systems of buildings and bridges, and vibration reduction of railway rolling stock and automobile suspension systems. [0003] Magnetorheological dampers are mainly used to control the vibration generated by the system components to meet the requirements of various equipment for different working conditions and different environments. Therefore, the performance of magnetorheolog...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16F9/53F16F9/19F16F9/34
CPCF16F9/182F16F9/19F16F9/3214F16F9/3221F16F9/3235F16F9/537
Inventor 胡国良刘丰硕
Owner EAST CHINA JIAOTONG UNIVERSITY
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