Low-current large-damping-force magneto-rheological damping device

Abstract

The invention provides a low-current large-damping-force magneto-rheological damping device. The low-current large-damping-force magneto-rheological damping device comprises a piston assembly, a piston rod assembly and a cylinder block filled with magneto-rheological fluid; the piston rod assembly comprises a threaded rod and a piston rod of a tubular structure, the threaded rod and the piston rodare coaxially arranged in the cylinder block, the lower end of the threaded rod is fixedly arranged at the bottom of the cylinder block, and the other end of the threaded rod is embedded in the piston rod and is in clearance fit with the piston rod; the piston assembly comprises a piston body and a mounting assembly used for mounting the piston body, the piston body sleeves the threaded rod, themounting assembly is in threaded fit with the threaded rod, a throttling hole is formed in the piston body in the axial direction, and a magnet exciting coil is arranged in the piston body. Accordingto the low-current large-damping-force magneto-rheological damping device, the larger damping force can be provided under the same control current, the material of the magneto-rheological fluid is notrequired to be changed, magnetic particle movement can be accelerated, thus the response time of the magneto-rheological fluid is shortened, heat energy dissipation of the magneto-rheological fluid is accelerated, and the whole damping device is simple in structure and low in cost.

Description

technical field [0001] The invention relates to a damping device, in particular to a magneto-rheological damping device with small current and large damping force. Background technique [0002] With the continuous development of the manufacturing industry towards high precision, vibration damping performance has become one of the main evaluation indicators of products. Among them, magnetorheological fluid stands out in the field of intelligent vibration reduction due to its rheological effect, and has received extensive attention and research. Magneto-rheological fluid is a kind of intelligent material, which has low viscosity-high fluidity under the action of no magnetic field and low magnetic field; high viscosity-low fluidity under the action of strong magnetic field, and this change has transient , Reversible characteristics. At present, it has been used in vehicles, bridges, machine tools, and aerospace industries, and has great development prospects. [0003] Magnet...

AI Technical Summary

Problems solved by technology

Increase the control current, on the one hand, the maximum control current of the system will be insufficient to provide the expected magnetic control force, on the other hand, it will cause energy waste

On the one hand, increasing the density of soft magnetic particles increases the zero-field viscosity of the magnetorheological fluid and increases the risk of its sedimentation, thereby causing partial or even complete failure of the damper; on the other hand, it increases the cost of the magnetorheological fluid and increases the quality of magnetorheological fluid

Moreover, in terms of improving the response of magnetorheological dampers, researchers at home and abroad have proposed methods such as optimizing the damper control algorithm and improving the magnetorheological fluid material. Among them, optimizing the damper control algorithm is low in cost, but it is difficult to develop and has little effect Significant; the effect of improving magnetorheological fluid materials is obvious, but the development of new materials requires a lot of experimental analysis, long development cycle and high cost

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