An electromagnetic active vibration absorber

Abstract

The invention discloses an electromagnetic type active vibration absorber which comprises two permanent magnets, a skeleton, two enamelled coils, an insulating sealing shell, a wiring port, two shaft bossings, an ejector pin, screws, two metal springs, a cover plate, a shell and a mass block; the shaft bossings are installed at the two ends of an inner ring of the annular skeleton; the permanent magnets are adhered to the periphery of the skeleton; the enamelled coils are encapsulated in the insulating sealing shell and installed in the shell; the metal springs are of a spring sheet structure with a center hole, are installed on the cover plate in a pressing manner and are installed at the two ends of the shell respectively; the lower end of the ejector pin penetrates through the two shaft bossings and the center holes of the metal springs and is fixed to the metal springs through the screws; the mass block is installed at the upper threaded end of the ejector pin; and the wiring port is adhered to the end of the insulating sealing shell so as to derive the enamelled coils out to be connected with a controller. The electromagnetic type active vibration absorber can better meet the vibration attenuation needs of low-frequency vibration and high-frequency vibration and also has the advantages of compact structure, small energy consumption, sensitiveness in respond, convenience in mounting, strong reliability and the like in engineering application.

Description

technical field [0001] The invention relates to a vibration absorber, in particular to an electromagnetic active vibration absorber. Background technique [0002] In the field of vibration control engineering, as an important means and effective measures to implement vibration control, the existing dynamic vibration absorber technology has developed into a technology including passive vibration absorber, semi-active vibration absorber and active vibration absorber. Traditional passive shock absorbers are generally additional substructures composed of mass and elastic elements. By tuning the mass and stiffness parameters of the additional substructure so that the natural frequency is consistent with the excitation frequency, the vibration energy on the main system is transferred to the additional subsystem. The passive vibration absorber is a structure with certain mass and stiffness parameters. Because its natural frequency cannot be too low and cannot be adjusted, the pass...

AI Technical Summary

Problems solved by technology

[0004] The existing active vibration absorber technology research is mainly concentrated in colleges and universities, such as the "electric active vibration absorber" disclosed in the patent document of patent application number 200810064058.7, and the "a wide-band inertial active vibration absorber" disclosed in the patent document of Vibration absorbers" all use the exciter to provide anti-phase power to the vibration-damping object, so as to achieve the effect of active vibration absorption. It can solve the principle problem of low-frequency vibration and wide-band vibration vibration damping. However, due to the selection of compression springs in its structure Or the tension spring is used as the return spring, and the guide shaft structure is used for radial positioning, which greatly increases the structural complexity of the shock absorber, makes its structural size too large, and reduces the reliability of the structure

In addition, its electromagnetic structure is composed of DC coil and AC coil, which increases the energy consumption in the working process.

Due to the above design deficiencies, it is difficult to apply the existing active vibration absorbers in actual engineering

[0005] Neither traditional passive vibration absorbers nor semi-active vibration absorbers can achieve good vibration reduction effects on low-frequency vibrations and broadband vibrations

However, most of the existing active vibration absorbers are difficult to be applied in practical engineering due to problems such as complex structure, oversized size, high energy consumption, and low reliability.

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