Double-rod multi-stage diffraction passive dual-control variable-damping magneto-rheological damper

Abstract

The invention discloses a double-rod multi-stage diffraction passive dual-control variable-damping magneto-rheological damper and belongs to the field of variable-damping magneto-rheological fluid instruments. The damper comprises a work cylinder body, two sets of end cap modules which are identical in structure and assembled at the two ends of the work cylinder body respectively, two sets of diffraction piston modules which are identical in structure and symmetrically arranged in the work cylinder body, magneto-rheological fluid, a small work gap port and a large work gap port. The work cylinder body is a hollow cylinder body, and the inner diameter of the work cylinder body is equal to the largest diameter of the diffraction piston modules. Each diffraction piston module comprises a piston body, a piston rod and a gradually-changed diffraction hole, wherein the piston body is installed at one end of the piston rod, and the gradually-changed diffraction hole is formed in the piston body and communicated with the piston body. When the magneto-rheological fluid flows into the damper from the small work gap, passes through the gradually changed diffraction hole and flows out from the large work gap, and damping force is gradually increased. The magneto-rheological damper is simple and reasonable in structure, has a gradually-changed work gap and does not consume energy.

Description

technical field [0001] The invention relates to the field of variable damping magnetorheological fluid instruments, in particular to a double-rod multi-stage diffraction passive dual-control variable damping magnetorheological damper. Background technique [0002] Under the action of a magnetic field, magnetorheological fluid can quickly realize the transformation from Newtonian fluid to Bingham fluid. The magnetorheological damper made of magnetorheological fluid has the characteristics of rapid response and controllable damping. In the prior art, the working principle of the magnetorheological damper is basically the same, that is, the damping force of the magnetorheological fluid flowing in the constant working gap is changed by using the control magnetic field generated by the excitation coil. Although the existing magneto-rheological damper has achieved variable damping, there are still some defects: (1) the working gap cannot be changed, so the damping force is basica...

AI Technical Summary

Problems solved by technology

Although the existing magneto-rheological damper has achieved variable damping, there are still some defects: (1) the working gap cannot be changed, so the damping force is basically unchanged under zero current state; (2) the energy consumption of the excitation coil after power-on Large, the suspended particles in the magnetorheological fluid will settle after power off

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