A Back-pressure Coil Spring Damper with Adjustable Initial Stiffness

Abstract

The invention relates to a back pressure type spiral spring damper with adjustable initial rigidity. The back pressure type spiral spring damper is characterized in that a back pressure device is further arranged in a guide sleeve, wherein the back pressure device comprises three or more pre-compaction steel wire ropes, steel wire rope turning elements which are as many as the pre-compaction steel wire ropes, a steel wire rope self-locking tensioning anchorage device and a floating back pressure steel plate; the pre-compaction steel wire ropes are distributed in a central hole of a cylindrical spiral compression spring in a folding mode; one end of each pre-compaction steel wire rope is symmetrically fixedly arranged on the floating back pressure steel plate around the axis of the guide sleeve; the other end of each pre-compaction steel wire rope is turned back after passing through one opposite steel wire rope turning element and is paralleled to be a rope bundle, then, passes through the floating back pressure steel plate from a fixed point, which allows the axis of the guide sleeve to pass through, on the floating back pressure steel plate, and is fixedly arranged on a second end cover the steel wire rope self-locking tensioning anchorage device; and each pre-compaction steel wire rope is tensioned to tension needed for setting initial rigidity, so that the composite spring is clamped between a drive component and the floating back pressure steel plate all the time.

Description

technical field [0001] The invention relates to a building anti-vibration (or vibration) device, in particular to a damping device comprising a helical compression spring. Background technique [0002] A damper is a device that dissipates the energy of motion by providing resistance to motion. 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...

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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