Magneto-rheological damper

Abstract

A magneto-rheological damper comprises a cylinder barrel, a left end cap, a piston rod, a piston, a right end cap, a connecting barrel, a winding barrel, a coil, an external guide magnet and a cap nut. The magneto-rheological damper has the advantages that the coil slides on the cylinder barrel in the direction identical with motion direction of the piston rod, so that a magnetic core on the piston and the external guide magnet are always guaranteed to form a closed magnetic loop, flow guiding can be functioned by an axial central hole and a radial hole in the piston, and magneto-rheological fluid viscosity can be changed by changing the size of the holes during working of the damper, and further, high-viscosity damping force can be generated. The coil is arranged outside the cylinder barrel, convenient for winding, convenient to maintain and check and good in sealing performance. By directly inflating the damper, extra purchasing an energy storage device is omitted, and the magneto-rheological damper has high applicability. Since the magneto-rheological damper is good in damping property, the magneto-rheological damper can be mounted on mechanical structures required to be damped, such as suspension damping of automobiles, damping of undercarriages of planes, damping of seats and bridges.

Description

technical field [0001] The invention belongs to the technical field of mechanical structure vibration control, in particular to a magneto-rheological shock absorber. Background technique [0002] Most traditional cars use passive suspension systems for shock absorption, which adjust the ride comfort and handling stability of the car through elastic elements and shock absorbers. However, it has proven difficult to satisfy both ride comfort and handling stability of a car. A softer suspension system, although the ride comfort of the vehicle is better, but its spring stiffness is small, which will increase the displacement of the vehicle body, which affects the handling stability of the vehicle; a harder suspension system, although the handling performance of the car It is better, but its spring stiffness is relatively large, which will reduce the comfort and affect the ride comfort of the car. In short, for this kind of passive suspension system, since the damping force of t...

AI Technical Summary

Problems solved by technology

[0004] At present, the commonly used magneto-rheological shock absorber is a coil built-in type, which is widely used because of its compact structure and small magnetic flux leakage, but its disadvantages are that the piston structure is relatively complicated, and the heat dissipation is poor. Leakage, inconvenient maintenance and inspection; In addition, the traditional magneto-rheological shock absorber with built-in coil generally places the coil inside the piston and needs to be guided by an additional guide plate, so its viscous damping force is generally low

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