Full damping channel valid MR damper

Abstract

The invention discloses an effective magneto-rheological damper of a full damping channel, wherein a cylinder is connected with an upper and a lower end covers, a piston rod is inserted in the steel cylinder through a sealing ring which is arranged on the end cover, a non-corrosive steel damping magnetic slab is mounted on two ends of a piston slab, a plurality of the piston slabs are provided and alternately sleeved on the piston rod with a magnetic core sleeve barrel, the outer lateral of the magnetic core sleeve barrel is winded with an excitation coil, the excitation coil is externally sleeved with a pair of guiding wires, and a damping magnetic sleeve ring is arranged between a pair of guiding wires. The invention which adopts the damper greatly improves the proportion of the effective length under the condition that the whole length of the damping channel is determined, basically realizes that the full damping channel is effective, and the damper increases the largest output to more than one time under the condition that the external geometric size is defined. The magneto-rheological damper which adopts the structure form can realize lager damper output with more ingenious shape, and greatly increase the employing efficiency of a semi-active control system.

Description

technical field [0001] The invention relates to a magneto-rheological damping device. The proposed magneto-rheological damper with effective full damping channels is an energy-consuming and vibration-reducing device with good performance, and can be generally applied to high-rise building structures, large-span space building structures, Vibration control of bridge structures and other civil engineering structures. Background technique [0002] Magnetorheological fluid is a suspended liquid whose shear yield strength can change with the external magnetic field and has controllable rheological properties formed by dispersing fine soft magnetic particles in a carrier liquid with low magnetic permeability; under the action of a magnetic field, the magnetic The rheological fluid can achieve a reversible change from Newtonian fluid to Bingham semi-solid within milliseconds, and can return to its original state after the magnetic field is removed. The magnetorheological damper ma...

AI Technical Summary

Problems solved by technology

However, due to the limitation of the diameter and the number of turns of the coil itself, the width of the coil slot (i.e., the ineffective length) cannot be reduced without limit, and usually accounts for more than half of the total length of the damping channel, and the maximum output of the damper will also be lost by more than half.

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