Magnetorheological fluid damping vibration isolator

Abstract

The invention belongs to the field of vibration control, and in particular relates to a shear mode magnetorheological fluid damper and a magnetorheological fluid damping vibration isolator with periodic impedance distribution formed by the magnetorheological fluid. The invention comprises a magnetorheological fluid damper and a magnetorheological fluid vibration isolator, the magnetorheological fluid damper and the magnetorheological fluid vibration isolator are connected by a flange, and a sealing ring is arranged at the joint for sealing; the magnetorheological fluid The damper includes three parts: the working cylinder, the piston assembly and the accumulator; the working cylinder includes the cylinder barrel, the upper cover and the piston assembly; the piston assembly includes the hollow piston rod, the piston head installed at the end of the piston rod, Piston guide, magnetic core on piston rod. When no current is applied or the control system fails, the magneto-rheological fluid damping isolator becomes a traditional damper, which also has a certain damping force and can play a role in reducing vibration. The arrangement of multi-layer electromagnets constitutes a phonon crystal structure, and the introduction of a phonon crystal structure can realize the isolation of elastic wave vibration in the middle and low frequency bands.

Description

technical field [0001] The invention belongs to the field of vibration control, and in particular relates to a shear mode magnetorheological fluid damper and a magnetorheological fluid damping vibration isolator with periodic impedance distribution formed by the magnetorheological fluid. Background technique [0002] Vibration can cause a series of problems, such as fatigue damage of mechanical parts, loosening and fracture failure caused by vibration, and equipment accidents directly or indirectly. In view of this, various vibration isolators have been used to reduce vibration and energy dissipation in industries such as aerospace, military guns, and automobiles. [0003] Magnetorheological fluid is an intelligent material that can quickly and reversibly transform from a Newtonian fluid with good fluidity to a Bingham elastoplastic with high viscosity and low fluidity under the action of a magnetic field. Magneto-rheological fluid can change its own state rapidly (short re...

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Problems solved by technology

[0005] Although the existing vibration and noise reduction structures are various, however, it is not only necessary to use the damping characteristics of magnetorheological fluids to develop magnetorheological fluid dampers, or to use the bandgap characteristics of phononic crystals to study vibration energy dissipation. There are few magnetorheological fluid damping vibration isolators designed by combining the damping and stiffness controllable properties of magnetorheological fluids and the bandgap energy dissipation properties of phononic crystals

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