Extension type quasi-zero stiffness vibration isolator and implementation method thereof

Abstract

The invention relates to an extension type quasi-zero stiffness vibration isolator and an implementation method thereof. The vibration isolator is formed by a negative stiffness mechanism in parallel connection with a positive stiffness main spring, wherein the negative stiffness mechanism is composed of extension springs, connecting rods, slide blocks and guide rails; negative stiffness can be generated in the vertical direction, and in addition, the defect that compression springs lose stability can be avoided; and it can be guaranteed that the structure is in bilateral symmetry when fine adjustment is conducted in the horizontal direction. On the basis of the principle that positive stiffness and negative stiffness counteract each other, after the negative stiffness mechanism is in parallel connection with the positive stiffness spring, stiffness, at the equilibrium position, of the vibration isolator is close to zero, and inherent frequency is also close to zero, so that starting vibration isolation frequency is greatly reduced; the vibration isolation section is increased; and capability of isolating low frequency or ultralow frequency vibration is achieved. The vibration isolator is simple and compact in structure and convenient to assemble and debug and has certain engineering application value in the fields such as automobiles, precise instruments, sensitive equipment, precision machining and aerospace engineering.

Description

technical field [0001] The invention relates to the field of vibration isolation devices, in particular to a tensile type quasi-zero stiffness vibration isolator and a realization method thereof. Background technique [0002] Vibration is the most common phenomenon in nature. It can be seen everywhere in daily life and production, such as leaves swaying in the wind, heart beating, cars bumping on the road, etc. From simple pendulums to complex bodies, from microscopic objects to macroscopic objects, vibration phenomena are everywhere. Among them, many vibrations will seriously affect people's life and industrial production, causing a lot of losses. Therefore, vibration isolation is an eternal research topic for human beings. [0003] The continuous development of high-precision technology has made the application field of vibration isolation technology, especially low-frequency vibration isolation technology, wider. Therefore, more and more people are exploring and researc...

AI Technical Summary

Problems solved by technology

The premise of isolating low-frequency vibration is that the natural frequency of the vibration isolation system must be very low. Since ordinary linear vibration isolation systems cannot overcome the trade-off between stiffness and load-bearing mass, it cannot be achieved

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