A Disc-shaped Nonlinear Low-Frequency Vibration Isolator Based on the Principle of Parallel Connection of Positive and Negative Stiffness

Abstract

The invention discloses a disc-shaped nonlinear low-frequency vibration isolator based on the positive and negative stiffness parallel connection principle. The disc-shaped nonlinear low-frequency vibration isolator is composed of a power input part, a tension spring system, a pressure spring system and a shell. Positive stiffness is achieved through the tension spring, negative stiffness is achieved through the pressure spring system, and the tension spring and the pressure spring system are combined, so that a system static force-displacement curve represents a quasi zero stiffness feature. The excellent vibration isolation performance of the nonlinear vibration isolator is continued; and meanwhile, through adjustment of a threaded structure and increasing or decreasing of the number of tension sets, the applicable vibration isolation mass range of the vibration isolator can be broadened greatly, and the defect that the vibration isolation mass range of an ordinary nonlinear vibration isolator is small is overcome.

Description

technical field [0001] The invention belongs to the field of low-frequency vibration isolation, and in particular relates to a disk-shaped nonlinear low-frequency vibration isolator based on the principle of parallel connection of positive and negative stiffnesses and having a large adjustment range of vibration isolation quality. Background technique [0002] Low-frequency vibration in engineering affects the stability and precision of equipment, reduces the strength of parts and even causes fatigue damage, causing unnecessary losses, and also brings noise pollution. Low-frequency vibration in some fields can also endanger the physical and mental health of workers . To address this limitation, effective low-frequency vibration isolation design is a research focus in various engineering fields. [0003] According to the traditional passive vibration isolation theory, the linear vibration isolation system has a better isolation effect on medium and high frequency vibrations,...

AI Technical Summary

Problems solved by technology

By designing the adjustment device, the mass application range of the vibration isolation system can be increased, but the mass adjustment range of the existing system is still insufficient, that is, it cannot be adjusted in a large range

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