Single degree of freedom magnetic damping shock absorber based on eddy current effect

Abstract

The invention discloses a single degree of freedom magnetic damping shock absorber based on eddy current effect. The absorber comprises a bottom plate, a ring magnet a, a ring magnet b, an aluminum tube, a copper plate bottom plate, a copper plate, a copper plate top plate, a bearing seat, a linear bearing, a bearing end cover, a load, a piston shaft, a step shaft, a fixed collar, a spiral spring,a lower clamping shaft and a fixing screw. The working principle is that when the shock absorber is in working mode, the ring magnet a is stationary and fixed to the lower end, the ring magnet b reciprocates in the vertical direction, the two magnets are attracted to each other, the spiral spring acts as a positive stiffness element to support the load, the relative motion of the ring magnet b generates a time-varying magnetic field, and the copper sheet arranged between the two ring magnets generates an eddy current damping effect under the influence of the magnetic field, the motion of thering magnet b is restrained, and the vibration of the load is reduced by consuming energy. The magnetic damping shock absorber is compact in structure and small in volume, can greatly reduce the resonance peak value of a system, and has good cushioning and damping performance.

Description

technical field [0001] The invention relates to the technical field of vibration reduction, in particular to a single-degree-of-freedom magnetic damping shock absorber based on the eddy current effect. Background technique [0002] Vibration generally exists in engineering technology and daily life. In some complex environments, vibration is the main factor affecting the processing and working accuracy of equipment. This phenomenon is attracting more and more attention. To this end, people have developed a variety of vibration reduction equipment, which greatly improves the machining accuracy and production efficiency. [0003] The traditional passive shock absorber is composed of mass, spring and damping elements with fixed parameters. It has a simple and reliable structure, but there are some shortcomings. It can meet the production requirements in general industrial occasions, but it is not effective in isolating low-frequency and ultra-low-frequency vibrations. It is no...

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Problems solved by technology

Based on the active control of the shock absorber, its working principle is to collect the information of the controlled object in real time through the sensor, so as to directly provide the same force to offset the force generated by the vibration, which greatly improves the performance of the system, and the required response is fast. However, external energy supply is required, and the cost is relatively high, so it is generally used in actual production

Based on the semi-active control of the shock absorber, the shock absorber collects the information of the controlled object in real time through the sensor to change its own natural frequency, so that it does not need to consume a lot of energy and can achieve a good vibration reduction effect, but the application has certain limitations

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