Magnetorheological fluid shock absorption buffering device under extrusion mode

Abstract

The invention relates to a magnetorheological fluid shock absorption buffering device under an extrusion mode. The device is mainly used for static contact shock absorption buffering in the aspects of buildings, bridges, heavy machinery equipment and the like. The device mainly comprises a connection bolt, a cover plate, a connection nut, a magnetic conducting outer barrel, a magnetorheological fluid, electromagnetic coils, a bottom plate, an isolation ring, a fixed block magnetic conductor, a movable block magnetic conductor and a movable block magnetic isolator. According to the invention, a buffered object is connected with the buffering device through the connection bolt, and a certain current is charged into the electromagnetic coils, thus a closed magnetic field is formed among the magnetic conducting outer barrel, the fixed block magnetic conductor, the movable block magnetic conductor and the magnetorheological fluid; and the magnetorheological fluid forms an extrusion shear yield stress in the direction of the magnetic field, and when a pressure is applied in the outside, the magnetorheological fluid generates elastic deformation and plays a shock absorption role on the outside. The device has a high compressive elastic modulus; and under the extrusion mode, the static displacement of the magnetorheological fluid is reduced with the increase of the applied current, therefore, higher bearing capacity and frequency shift characteristic are achieved.

Description

technical field [0001] The invention relates to a shock-absorbing and buffering device for magnetorheological fluid, in particular to a shock-absorbing and buffering device for magnetorheological fluid in extrusion mode. Background technique [0002] At present, in the research field of magnetorheological shock-absorbing buffer devices, it is mainly aimed at that after the rheological effect of magnetorheology occurs, the external force drives the moving module in the buffer device to shear the magnetorheological fluid, thereby causing external shocks. to a shock-absorbing and buffering effect, and the shear yield stress of magnetorheological fluid is much smaller than the extrusion yield stress, and the external force required for elastic deformation of magnetorheological fluid in shear mode is relatively small. Therefore, In the shear mode, the magnetorheological buffer device is only suitable for occasions where the external force is relatively small, such as small machin...

AI Technical Summary

Problems solved by technology

For buildings, bridges, heavy machine tools and other occasions, if the buffer device of magnetorheological fluid in shear mode is used again, the effect will be unstable or energy consumption will be increased

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