Double-rod variable-orifice active single-control variable-damping magneto-rheological damper

Abstract

The invention discloses a double-rod variable-orifice active single-control variable-damping magneto-rheological damper, and belongs to the field of variable-damping structure vibration isolation magnetorheological fluid instruments. The double-rod variable-orifice active single-control variable-damping magneto-rheological damper comprises a working cylinder body module, two sets of end cover modules which are completely the same in structure, a piston module, a working gap and a power source; the two sets of end cover modules are arranged at the two ends of the working cylinder body module respectively, and the piston module is arranged inside the working cylinder body module; the working cylinder body module comprises a rheological fluid cylinder body, an electrifying coil and a coil shielding layer; the diameter of a gradually-changed throttling column is changed linearly along the axis, the diameter of the middle portion of the column is maximum, and the diameters of the two ends of the column are minimum; and the inner diameter of an orifice is equal to the maximum diameter of the gradually-changed throttling column. According to the variable-damping magneto-rheological damper, the structure is compact, the working gap is changed through the gradually-changed throttling column, and the strength of a magnetic field is controlled through the power source.

Description

technical field [0001] The invention relates to the field of vibration-isolation magneto-rheological fluid instruments with a variable damping structure, in particular to a dual-rod variable orifice active single-control variable-damping magnetorheological damper. Background technique [0002] Magneto-rheological damper is an intelligent vibration reduction instrument widely used in structural vibration control fields such as automobiles, bridges, and buildings, and plays an important role in structural vibration reduction. The existing magnetorheological damper changes the viscosity of the fluid through the application of an external magnetic field, so that the magnetorheological fluid obtains different damping forces through the working gap between the outer peripheral wall of the piston and the inner peripheral wall of the working cylinder. Although the magnetorheological damper in the prior art realizes variable damping, it still has certain disadvantages: the working ga...

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Problems solved by technology

Although the magnetorheological damper in the prior art realizes variable damping, it still has certain disadvantages: the working gap between the outer peripheral wall of the piston and the inner peripheral wall of the working cylinder is constant, and the change of the damping force depends entirely on the change of the external magnetic field. Therefore, the adjustment range of the damping force is limited

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