Hybrid Mode Magnetorheological Isolators

Abstract

The invention relates to a hybrid mode magneto-rheological vibration isolator, comprising an upper shell, a lower shell fastened with the upper shell, and a damping assembly arranged in the upper shell and the lower shell; The damping assembly includes an inner damping assembly and an outer damping assembly; the inner damping assembly includes an extruded magnetic core, an inner magnetic core ring that is radially spaced outside the extruded magnetic core, an upper magnetic plate placed on the extruded magnetic core, and a set The magnetically conductive disc and the lower magnetic plate under the extruded magnetic core; a radial upper extrusion damping channel is formed between the extruded magnetic core and the upper magnetic plate, and a radial upper extrusion damping channel is formed between the extruded magnetic core and the magnetically conductive disc. The radially lower extrusion damping channel, the upper extrusion damping channel and the lower extrusion damping channel communicate through the gap between the extruded magnetic core and the inner magnetic core ring; the magnetic conduction disk forms a communication with the lower magnetic plate The circumference of the lower extrusion damping channel is radial to the damping channel, and the lower housing is provided with an elastic bottom film; it is beneficial to realize active vibration isolation in a wider frequency range and meet the vibration isolation requirements of vehicles under different working conditions.

Description

technical field [0001] The invention relates to a magneto-rheological vibration isolator, in particular to a mixed-mode magneto-rheological vibration isolator. Background technique [0002] Magneto-rheological fluid is a kind of intelligent material with both magnetic permeability and fluidity of magnetic materials. Under the action of a magnetic field, magnetorheological fluid can change from a free-flowing liquid to a semi-solid in an instant (milliseconds), showing a possible Controlled yield strength, this rheological property changes continuously and steplessly with the magnetic field, and the change is reversible. The magnetorheological vibration isolator uses the rheological characteristics of the magnetorheological fluid to change the output damping force and stiffness of the magnetorheological vibration isolator by controlling the current in the excitation coil to change the magnetic field strength, thereby isolating the vibration of the vehicle powertrain . [00...

AI Technical Summary

Problems solved by technology

[0004] 1) Traditional magnetorheological isolators mostly use a single mode such as flow or extrusion. The flow mode has better controllability but its output damping force is small. The extrusion mode can provide greater damping force but is less controllable. Poor, which limits the vibration isolation effect of the vibration isolation system;

[0005] 2) Existing multi-mode magneto-rheological vibration isolators generally drive multiple excitation coils corresponding to different working modes, making the structure more complex and occupying a larger space;

[0006] 3) Existing magneto-rheological vibration isolators have limited vibration isolation frequency range and suspension dynamic stiffness, which cannot meet the use requirements of automotive powertrains under various working conditions

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