Rotary magnetic rheological liquid damper

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...

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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.

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