Back pressure type helical compression spring damper

Abstract

The invention relates to a back pressure type helical compression spring damper. The back pressure type helical compression spring damper is characterized in that a back pressure device is further arranged in a guide sleeve, the back pressure device comprises more than three prepressing steel wire ropes, steel wire rope turning elements and a floating back pressure steel plate, wherein the number of the steel wire rope turning elements is equal to that of the prepressing steel wire ropes, the prepressing steel wire ropes are arranged in a center hole of a cylindrical helical compression spring in the state of broken lines, one end of each prepressing steel wire rope is symmetrically fixed to the floating back pressure steel plate around the axis of the guide sleeve, the other end of each prepressing steel wire rope bypasses one opposite steel wire rope turning element and then turns back, then all of the prepressing steel wire ropes are arranged in parallel so as to form a rope beam and pass through the floating back pressure steel plate so as to be fixed to a second end cover from a point, through which the axis of the guide sleeve passes, in the floating back pressure steel plate, and the prepressing steel wire ropes are tensioned to tension required by preset initial rigidity, so that the cylindrical helical compression spring is clamped between a driving member 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 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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