Quasi zero stiffness vibration isolator using multilayer squeezing type magnetic spring and oscillating bar

Abstract

The invention discloses a quasi zero stiffness vibration isolator using multilayer squeezing type magnetic spring and oscillating bars. The vibration isolator comprises a main shaft, guiding shafts, the oscillating bars and a multiplayer structure; the multilayer structure comprises an upper roof arranged from top to bottom in sequence, an upper end cover, a negative stiffness unit, a lower end cover, positive stiffness unit and a bottom plate; the main shaft is a center shaft with multilayer structure; the guiding shafts and the oscillating bars are multiple, and are all arranged around the main shaft at fixing intervals; the structure is compact, and has more bearing ability under relatively small size. In addition, the negative stiffness unit and the positive stiffness unit are connected in parallel by the vibration isolator using the principle of magnetic negative stiffness; the vibration isolator has the characteristics of high static stiffness and low dynamic stiffness, the inherent frequency of the vibration isolator can be efficiently reduced, the vibration isolation frequency band is widened, and the vibration isolator is suitable for low frequency vibration isolation; thenegative stiffness unit is in the form of multilayer squeezing type magnetic spring, the stronger magnetic induction intensity can be produced, the negative stiffness of magnetic spring is increased,the negative stiffness unit is suitable for high loading occasion, and a wide range of applications is met.

Description

technical field [0001] The invention relates to the technical field of vibration isolation, in particular to a quasi-zero-stiffness vibration isolator adopting a multi-layer extruded magnetic spring and a swing rod. Background technique [0002] Mechanical vibration is a common phenomenon in production practice. Vibration occurs when a system is excited by an external source of vibration. Mechanical vibration is a double-edged sword in industrial production. On the one hand, people can use vibration to serve industrial production, such as vibration screening, vibration pile sinking, vibration transportation, and sensors designed according to vibration theory, which are often used in industry; however, in the technical fields of national defense technology, industrial machinery, instruments, and instruments , Mechanical vibrations often lead to structural failure, large noise, and shortened service life. For example, the vibration of instruments and instruments will reduce...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing quasi-zero stiffness vibration isolator is not compact enough, the bearing capacit...

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