Low-frequency large-stroke quasi-zero stiffness vibration isolation device

Abstract

The invention discloses a low-frequency large-stroke quasi-zero stiffness vibration isolation device, belongs to the technical field of mechanical vibration and noise control, and aims at solving theproblems that the dynamic stiffness of an existing quasi-zero stiffness vibration isolator can keep a quasi-zero displacement stroke to be small, so that the vibration isolation effect of the existingquasi-zero stiffness vibration isolator is extremely sensitive to the external environment and borne loads, and the existing quasi-zero stiffness vibration isolator cannot adapt to severe and complexactual working conditions. An upper platform and a lower platform are oppositely arranged in parallel up and down, a rhombus spring structure is arranged between the upper platform and the lower platform, the top of the rhombus spring structure is fixedly connected with the center point of the lower surface of the upper platform, and the bottom of the rhombus spring structure is fixedly connectedwith the center point of the upper surface of the lower platform. The two adjusting limiting supporting structures are oppositely arranged at the two ends of the rhombic spring structure, the bottomof each adjusting limiting supporting structure is fixedly connected with the upper surface of the lower platform, and the top of each adjusting limiting supporting structure is fixedly connected withthe lower surface of the upper platform. The low-frequency large-stroke quasi-zero stiffness vibration isolation device is suitable for isolating low-frequency vibration generated by a vibration source within a large displacement range.

Description

technical field [0001] The invention belongs to the technical field of mechanical vibration and noise control, and in particular relates to a quasi-zero-stiffness vibration isolation device with low frequency and large stroke. Background technique [0002] Passive vibration isolation devices are widely used in engineering because of their simple structure, low cost and easy maintenance. If traditional linear passive vibration isolators want to maintain low-frequency vibration isolation, their bearing capacity will inevitably decrease, which has become an unavoidable contradiction for linear vibration isolators. Nonlinear vibration isolators are an effective means to solve this problem. The quasi-zero stiffness system with nonlinear characteristics has low dynamic stiffness and high static stiffness characteristics, and the dynamic stiffness at the static equilibrium position is zero or quasi-zero. It can meet the large load and low natural frequency requirements required by...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the dynamic stiffness of the existing quasi-zero stiffness vibration isolator can keep the quasi-zero displacement stroke small, its vibration isolation effect is extremely sensitive to the external environment and the load it receives, and cannot adapt to harsh and complicated actual working conditions. , and then provide a low-frequency large-stroke quasi-zero-stiffness vibration isolation device;

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