Spiral compression spring damper with presettable rigidity

Abstract

The invention relates to a spiral compression spring damper with presettable rigidity, characterized in that a back pressure device is also arranged between two end plates and comprises more than three prestressed wire ropes, wire rope direction-varying elements as many as the prestressed wire ropes, and a floating back pressure steel plate, wherein the prestressed wire ropes are distributed around a cylindrical spiral compression spring in a broken line form, one ends of the prestressed wire ropes are fixed to the floating back pressure steel plate symmetrically around the axis of a guide rod, and the other end of each prestressed wire rope is passed through the opposing wire rope direction-varying element and returned, and is passed through the floating back pressure steel plate near a fixation point of such prestressed wire rope on the floating back pressure steel plate and then fixed to the end plate adjacent to the floating back pressure steel plate; the prestressed wire ropes are tensioned to tension required by preset initial rigidity, such that the cylindrical spiral compression spring is clamped between the end plate, far away from the floating back pressure steel plate, 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 coil spring damping device. Background technique [0002] A damper is a device that provides resistance to movement and consumes movement energy. Since the 1970s, dampers have been gradually transferred from industries such as aerospace, aviation, military, guns, and automobiles to structural engineering such as buildings, bridges, and railways. Coil springs are widely used in devices such as shock isolation and shock absorption due to their variable stiffness characteristics in which the load and deformation are linearly related. Coil springs are classified according to the method of use, mainly including extension springs and compression springs, among which cylindrical helical compression springs are most commonly used in dampers. However, a specific cylindrical helical compression spring can only work in a compressed state within the effective working ran...

AI Technical Summary

Problems solved by technology

However, this utility model patent obviously has the following disadvantages: 1. Two cylindrical 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 impossible or even impossible to guarantee The stiffness of the two springs (including tensile stiffness and compression stiffness) are equal, so the shock absorption effect is different in different wind directions; 3. The stiffness of the damper cannot be changed to achieve the preset wind resistance level and reduce the cost of shock absorption; 4. A cylindrical coil 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 stretching and compression can only be realized by reducing the elastic deformation range of the cylindrical coil spring. Two working states, which will obviously cause waste of resources

It can be seen that although the stiffness of the spring in the patent application scheme can be changed, the effective working length of the spring is not only significantly shortened, but also can only be compressed for energy consumption and vibration reduction, and cannot be stretched for energy consumption and vibration reduction.

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