Serpentine magnetorheological damper with external multi-coil excitation

Abstract

The invention discloses a serpentine magnetorheological damper with external multi-coil excitation. The serpentine magnetorheological damper mainly comprises damper end covers, damper cylinders, excitation coils, a piston, hanging rings and the like and is characterized in that a first liquid channel, a second liquid channel and a third liquid channel formed among the damper cylinder I, the dampercylinder II, the damper cylinder III and the damper cylinder IV are serially connected through circular through holes to form a serpentine liquid channel, and 15 effective damping gaps are formed under the excitation of the four excitation coils. By the structure, the damper has the advantages that damping gap length can be increased effectively while the dimension is not increased, and the damper can provide damping force large enough; the external excitation coils can be prevented from contacting with magnetorheological liquid, the problem that the performance of the magnetorheological liquid is affected by the heat generated by the coils during working is solved effectively, the coils can be conveniently replaced and maintained, and the stability of the damper is increased; the damperis stable in performance, large in output damping force and especially applicable to the field of high-power engineering machinery damping.

Description

technical field [0001] The invention relates to a magnetorheological damper, in particular to a serpentine magnetorheological damper with external multi-coil excitation. Background technique [0002] The magnetorheological damper is a new type of intelligent shock absorber, which can realize semi-active control by using the magnetorheological effect of magnetorheological fluid. The intelligent shock absorber has many advantages, such as large output damping force, wide adjustment range, fast response speed and simple structure. At present, magnetorheological dampers have been applied in many fields such as automobile suspension, railway locomotives and bridge construction. [0003] The magneto-rheological damper winds a set of coils on the built-in piston head, and passing current can generate magnetic force lines perpendicular to the damping gap. The viscosity of the magnetorheological fluid changes under the action of a magnetic field, thereby generating an output dampin...

AI Technical Summary

Problems solved by technology

The external excitation coil is not in contact with the magneto-rheological fluid, which effectively solves the problem that the heating of the excitation coil affects the performance of the magneto-rheological fluid; in addition, it is convenient to replace and repair the excitation coil when it is damaged

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