All-shearing type magneto-rheological damper

Abstract

The invention discloses an all-shearing type magneto-rheological damper. The all-shearing type magneto-rheological damper is characterized by comprising an outer cylinder, an inner cylinder and a ball screw pair, wherein the inner cylinder is coaxially arranged with the outer cylinder, shearing discs are fixed by the ball screw pair, the inner wall of the inner cylinder is provided with electromagnetic coils and sharing ring sets corresponding to the shearing discs one by one, magneto-rheological liquid is filled in a cavity of the inner cylinder, at least one electromagnetic coil is arranged between adjacent shearing rings fixed on the inner wall of the inner cylinder, and the shearing discs, the shearing rings and the inner cylinder form a closed flux loop. On the premise of keeping same external size and energy consumption of a magneto-rheological damper, null-field viscous damping of the magneto-rheological damper is reduced, controllable damping ratio range is enlarged, and the all-shearing type magneto-rheological damper is added with potential for application to a high-speed impact/vibration control system. Besides, service efficiency of the magneto-rheological liquid in the magneto-rheological damper is improved, and cost of the magneto-rheological damper is effectively reduced.

Description

technical field [0001] The invention relates to a magneto-rheological semi-active controllable actuator, in particular to a magneto-rheological semi-active controllable actuator suitable for bicycles, motorcycles, automobiles, trucks, ships, trains, airplanes, bridges, buildings, sports facilities and other vibration / shock control systems Pure shear magnetorheological damper. Background technique [0002] In the past two decades, due to its excellent performance of semi-active actuators, including fast response, stepless controllability of damping force, simple structure, good durability and low power consumption, magnetorheological dampers have been The vibrator can be completely replaced under the external dimensions and installation conditions, and has been studied and used to form a variety of semi-active vibration / shock control systems, including anti-seismic buffer systems for building structures, suspension systems for cars and trains, automobiles, fast boats, and air...

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Problems solved by technology

[0005] In order to avoid the disadvantages of the above-mentioned prior art, the present invention provides a pure shear magneto-rheological damper, aiming at the low utilization rate of the magnetorheological fluid in the magnetorheological damper in the prior art and the controllable damping Due to the limited range of force and controllable damping ratio, a magnetorheological fluid with high utilization rate and excellent controllable damping force performance can be realized without changing the external size and excitation energy consumption of the existing magnetorheological damper. Pure shear magnetorheological damper

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