A rubber air spring damper with preset initial stiffness

Abstract

The invention relates to a rubber air spring damper capable of presetting initial rigidity. The rubber air spring damper is characterized in that a back pressure device is arranged in a guide sleeve; the back pressure device includes more than three prepressing steel wire ropes, steel wire rope turning elements equal to the prepressing steel wire ropes in number and a floating back pressure steel plate, wherein the prepressing steel wire ropes are distributed in annular space between the guide sleeve and a rubber air spring in a folding state; one ends of all the prepressing steel wire ropes are symmetrically fixed on the floating back pressure steelplate around the axis of the guide sleeve, and the other ends are returned after penetrating through the corresponding steel wire rope turning elements, and are fixed on a second end cover after penetrating through the floating back pressure steel plate beside the fixed points of the prepressing steel wire ropes on the floating back pressure steel plate; and the prepressing steel wire ropes are tensioned to reach the tension needed by initial rigidity presetting, so that the rubber air spring is always clamped between a driving component and the floating back pressure steel plate.

Description

technical field [0001] The invention relates to a building anti-vibration (or vibration) device, in particular to a damping device containing a rubber air spring. Background technique [0002] The rubber air spring is a curved capsule formed by laminating rubber and network cables. The two ends of the capsule are sealed with two steel plates to form a compressed air chamber, which uses the compressibility of the air to achieve elastic action; due to the non-linear nature of the rubber air spring characteristics, and low natural frequency, it is widely used as a vibration isolation component in some high-frequency vibration occasions, such as automobiles, high-frequency machinery and building structures. [0003] For the design of anti-seismic structures, especially the anti-seismic structures of high-rise buildings, people pursue a comprehensive anti-seismic performance that combines "resistance" and "consumption", that is, under the action of weak wind vibration and small e...

AI Technical Summary

Problems solved by technology

However, this utility model patent obviously has the following disadvantages: 1. Two coil springs are required, and the length of the entire damper is relatively long, which is not suitable for installation in a space with a small distance; 2. It is difficult or even impossible to ensure the two springs in the process Only the stiffness of the spring (including tensile stiffness and compression stiffness) is equal, so the shock absorption effect is different in different wind directions; 3. The early stiffness of the damper cannot be changed to achieve the preset wind resistance level and reduce the cost of shock absorption; 4. A helical spring works in two states of tension and compression at the same time. The metal material and production process of the existing spring are difficult to meet the requirements. The two working states of tension and compression can only be realized by reducing the elastic deformation range of the helical spring. , which obviously wastes resources

Since the rubber air spring is a closed air chamber whose main body is made of rubber, the above three means of changing the effective working length of the spring are obviously not suitable for the rubber air spring; , and can only compress energy-dissipating vibrations, but not stretch energy-dissipating vibrations

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