New broadband vibration damping device

Abstract

The invention discloses a novel broadband vibration damping device, which comprises a support sleeve and a piston outer cylinder outer covering the support sleeve; inside the support sleeve, a drive motor, a rotary magneto-rheological damper are sequentially arranged along the axial direction of the support sleeve The piston ring is fixedly connected with the end of the support sleeve, and the inside of the piston ring is provided with a wedge-shaped block with a trapezoidal structure; the end of the ball screw assembly is provided with a Axially moving and then extruding the wedge-shaped block to push the piston to expand in the circumferential direction; friction plates are fixedly installed between the wedge-shaped block and the outer cylinder of the piston; The variable damper realizes the stability of the pressure, ensures the "anti-lock" effect of the structure, adjusts the positive pressure and changes the friction coefficient of the friction plate embedded in the outer cylinder according to the requirements of different working conditions, obtains the required Coulomb resistance, and improves the vibration damping performance.

Description

technical field [0001] The invention relates to the field of mechanical vibration reduction, in particular to a novel broadband vibration reduction device. Background technique [0002] The damping coefficient of most existing damping mechanisms is closely related to the speed and has limited suppression effect on high-frequency vibration; the traditional rubber damper is greatly affected by temperature and cannot provide better damping effect at low frequencies; the existing hydraulic damper The vibration method cannot achieve better vibration reduction in low-amplitude and high-frequency working conditions; the piezoelectric adaptive vibration reduction device has a complex mechanism, high cost, and high energy consumption; some studies have applied magnetorheological technology to semi-active vibration reduction. However, the suppression effect of the magneto-rheological damper at high-frequency vibration is not ideal, and its speed has little influence, so it cannot meet...

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Problems solved by technology

[0002] The damping coefficient of most existing damping mechanisms is closely related to the speed and has limited suppression effect on high-frequency vibration; the traditional rubber damper is greatly affected by temperature and cannot provide better damping effect at low frequencies; the existing hydraulic damper The vibration method cannot achieve better vibration reduction in low-amplitude and high-frequency working conditions; the piezoelectric adaptive vibration reduction device has a complex mechanism, high cost, and high energy consumption; some studies have applied magnetorheological technology to semi-active vibration reduction. However, the suppression effect of the magneto-rheological shock absorber at high-frequency vibration is not ideal, and its speed has little influence, which cannot meet the requirements of high-frequency vibration reduction.

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