Magnetorheological damper with multi-piece piston and single rod

Abstract

The invention discloses a magnetorheological damper with a multi-piece piston and a single rod. The magnetorheological damper consists of a working cylinder, an external electromagnet, a compensating air bag, the multi-piece piston and a piston rod, wherein the multi-piece piston consists of three or more groups of dynamic pieces; each group of dynamic piece has a circular ring form, and consistsof a strip flat plate which has a round hole in the center and two semicircular arc flat plates; the circular ring form is formed by respectively connecting one semicircular arc flat plate to one of two parallel straight edges of the strip flat plate which has the round hole in the center by a hinge; the outer diameters of the dynamic pieces are smaller than the inner diameter of the working cylinder; the flowing gaps of magnetorheological liquid are left; the groups of dynamic pieces of the multi-piece piston are fixed at one end of the piston rod at certain intervals through the round holeson the dynamic pieces; the other end of the piston rod is stretched out of the working cylinder through a sealing device and a bearing on the end face of the working cylinder; the compensating air bag is arranged at the bottom in the working cylinder; the external electromagnet is fixed on the external circumference of the working cylinder; the working cylinder is made of a magnetically-nonconductive material; and the magnetorheological liquid is fully filled in the working cylinder.

Description

technical field [0001] The invention belongs to a magneto-rheological damper, in particular to a magneto-rheological damper with multiple pistons and a single rod. Background technique [0002] The damping force generated by ordinary single-rod magneto-rheological dampers is asymmetrical. Therefore, this type of magnetorheological damper is often used in the vibration reduction of automobiles and other transportation vehicles. Because ordinary single-rod magneto-rheological dampers are The piston is wound with an excitation coil, so when the ordinary single-rod magneto-rheological damper is working, the piston moves in the working cylinder, and the excitation coil on the piston will be repeatedly washed by the magneto-rheological fluid, which will have adverse effects. At the same time, the asymmetry of the damping force of the ordinary single-rod magneto-rheological damper is difficult to increase due to the limitation of its own structure. Contents of the invention [0...

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Problems solved by technology

[0002] The damping force generated by ordinary single-rod magneto-rheological dampers is asymmetrical. Therefore, this type of magnetorheological damper is often used in the vibration reduction occasions of automobiles and other transportation tools. Because ordinary single-rod magnetorheological dampers are in The piston is wound with an excitation coil, so when the ordinary single-rod magneto-rheological damper is working, the piston moves in the working cylinder, and the excitation coil on the piston will be repeatedly washed by the magneto-rheological fluid, which will have adverse effects. At the same time, the asymmetry of the damping force of the ordinary single-rod magneto-rheological damper is difficult to increase due to the limitation of its own structure.

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