A shock absorber with variable damping, adjustable mass and stiffness and quantitative adjustment method for stiffness

Abstract

The invention discloses a shock absorber with variable damping, adjustable mass and stiffness and a quantitative adjustment method for stiffness. The shock absorber includes a base, a rubber washer, a quality block, a top end cover, a nut, a screw rod, an inner end cover, a lining Set, adjusting plug, rubber sleeve, rail seat. When the system vibrates, the mass block vibrates and absorbs part of the energy under the support of the rubber gasket, and the vibration inside the rubber sleeve consumes part of the energy, so as to achieve the purpose of vibration reduction of the main system. The quality of the shock absorber is adjusted through the number of mass blocks; the change of the outer diameter of the bushing is controlled by the depth of the screw-in adjustment plug to realize the adjustment of the damping of the shock absorber; the upper and lower rubber washers are adjusted by tightening the top nut. The degree of compression, according to the relationship between the compression amount of the rubber gasket and the compression stiffness, realizes the quantitative adjustment of the shock absorber stiffness, and achieves a better vibration damping effect without experiments. The invention has a simple and compact structure, can realize quantitative adjustment of stiffness and quality, and has a wide application range.

Description

technical field [0001] The invention relates to the technical field of vibration passive control, in particular to a shock absorber with variable damping, adjustable mass and stiffness and a quantitative adjustment method for stiffness. Background technique [0002] With the rapid development of modern industry and industry, high processing speed, high processing accuracy and high reliability have become the development trend in the field of mechanical processing. In this context, tiny vibrations in the machining process will affect the quality and efficiency of machining, and even cause damage to the entire machining system. Therefore, many scholars and engineers are devoted to the research and improvement of damping technology, and have designed many different forms of dampers. [0003] At present, there are mainly three modes of shock absorbers: passive control, active control and semi-active control. The dynamic vibration absorber based on passive control is the most w...

AI Technical Summary

Problems solved by technology

However, the mass, damping, and stiffness of most dynamic vibration absorbers are not adjustable at present, that is, once the installation is completed, its frequency response range, damping ratio and other characteristics will be fixed, so that once the excitation frequency or the natural frequency of the main system changes If it exceeds its operating frequency range, the vibration damping ability of the shock absorber will drop sharply, and even bring negative effects

In addition, although some scholars have designed shock absorbers with adjustable parameters, in the actual adjustment process, they all adopt the trial and error method. In good condition, this is not only time-consuming and laborious, but also cannot be adjusted quantitatively when the working conditions change

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