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Rotary magnetic rheological liquid damper

A magneto-rheological fluid and damper technology, which is applied in the field of damping devices, can solve problems such as difficult dissipation of energy consumption and heat, increase in axial size, and complex structure, and achieve simple structure, reduced power consumption and calorific value, and compact system Effect

Inactive Publication Date: 2005-02-16
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its axial dimension also increases accordingly; and the operating current of the electromagnetic coil should be increased correspondingly to ensure that the magnetic field strength acting on the magnetorheological fluid remains unchanged; at the same time, the heat generated by energy consumption is not easy to dissipate
That is to say, for the traditional rotary damper, if the structure is simple, the size is small, and the energy consumption is small, the damping torque is small, and if the damping torque is large, the structure is complex, the size is large, and the energy consumption is high.

Method used

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Embodiment Construction

[0012] The embodiment of the present invention is as follows: the outer diameter of the damper is 116 mm, the height is 70 mm, and the diameter of the rotating shaft is 10 mm. The outer diameter of the damping barrel is 98mm, the height of the barrel is 35mm, and the wall thickness is 5mm. The electromagnetic coil is wound with 0.6mm enameled wire, the winding is 800-1000 turns, and the inner diameter is 40mm. The resistance is 6Ω. The maximum working current is 2A, and the maximum input power is 24W. Magnetorheological fluid from Lord Company of the United States is used. The damping torque provided is: 0.6Nm at zero field and 30Nm at maximum current. The magnetic field utilization rate is high, and there is almost no magnetic field leakage (under the excitation current of 2A, the magnetic field strength on the outer surface of the device is less than 0.6mT).

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Abstract

The present invention relates to device, in which magnetic rheological liquid is used to produce rotating damping moment. The rotary magnetic rheological liquid damper includes damping plate, rotating shaft, magnetic rheological liquid, electromagnetic coil, inner casing, outer casing, etc. It features the barrel-shaped damping plat and core type electromagnetic coil. It has high damping moment, compact structure and simple structure, small volume, no magnetic field leakage and thus high magnetic field utilization rate. In addition, it has low moment in zero current, wide electrically controlled moment range, low power consumption, high reliability and stability.

Description

Technical field: [0001] The invention relates to a damping device, in particular to a device using magneto-rheological fluid to generate rotational damping torque. Background technique: [0002] At present, the research and design of the magneto-rheological fluid damper is represented by Lord Company of the United States. The load-bearing surface of the rotary damper is a common disc structure, the only difference is the layout of the magnetic field (that is, the position of the electromagnetic coil is divided into two types: built-in type and external type). For obtaining the same damping moment, the inner type has a larger radial dimension, while the outer type has a larger axial dimension. Due to the small damping torque produced by a single damping disc, dampers with multiple discs have also been developed. Compared with single-plate dampers, the damping torque increases with the number of discs. However, its axial dimension also increases correspondingly; and the wor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16F9/53
Inventor 周刚毅陈刚张培强张先舟
Owner UNIV OF SCI & TECH OF CHINA
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