Quasi-zero stiffness vibration isolation device

Abstract

A quasi-zero stiffness vibration isolation device comprises a disc spring vibration isolation mechanism and a cross vibration isolation mechanism. The disc spring vibration isolation mechanism comprises a supporting seat assembly, a middle shaft assembly and grooving disc springs; the supporting seat assembly comprises cylindrical supporting seat outer ring with the upper portion and the lower portion being open; the middle shaft assembly comprises a middle shaft concentrically arranged in the supporting seat outer ring; at least one grooving disc spring is arranged on a middle shaft in a sleeving mode, the radial inner sides of the grooving disc springs are embedded in the middle shaft, and the radial outer sides of the grooving disc springs are embedded in the supporting seat outer ring;the cross vibration isolation mechanism comprises an upper cross bracket and a lower cross bracket which are horizontal and arranged in an up-down spaced mode; a through hole with a vertical axis isformed in the center of the upper cross bracket, the two ends of four arc-shaped spring plates are connected with the corresponding cross ends of the upper cross bracket and the lower cross bracket, the middle shaft upwards penetrates out of the upper end face of the upper cross bracket from the through hole in the upper cross bracket, and the upper portion of the supporting seat outer ring is connected to the lower portion of an upper cross connecting bracket. Through the structure, the quasi-zero stiffness vibration isolation device has the double vibration isolation effects in the verticaldirection and horizontal direction.

Description

technical field [0001] The invention relates to the technical field of shock isolation, in particular to a quasi-zero stiffness shock isolation device. Background technique [0002] The working environment of ships is complex, and there are a large number of shipboard equipment on them. On the one hand, the vibration and noise generated by the equipment itself will affect the quietness of the cabin and the working environment of instruments and meters. Especially for ships, it will affect their life-and-death concealment; on the other hand, when resisting the impact caused by external attacks, the anti-shock and anti-overturning capabilities of equipment directly determine the ship's ability to resist external attacks. Therefore, vibration control on ships is of paramount importance. For vibration control, there are mainly three methods of active isolation, semi-active and passive isolation. Due to factors such as complexity and cost, the most widely used method is passive...

AI Technical Summary

Problems solved by technology

However, for traditional structures, reducing the natural frequency means reducing the static stiffness of the system or increasing the mass of the system, resulting in an increase in the static displacement of the system

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