Self-resetting friction-changing damper

A technology of variable friction and damper, which is applied in the direction of friction shock absorber, building components, anti-shock, etc. It can solve the problems that the variable friction damper does not have self-resetting function and limits the scope of engineering application, so as to save time and economic cost, Strong engineering applicability and the effect of reducing residual deformation

Inactive Publication Date: 2015-04-01
HUAQIAO UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It should be pointed out that the above variable friction dampers can only achieve a single double triangle hysteresis curve, which limits their engineering application scope to a certain extent; on the other hand, these variable friction dampers do not have self-resetting function, that is, they cannot Provide restoring force to the main structure to reduce its residual deformation after earthquake (vibration)

Method used

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  • Self-resetting friction-changing damper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Please check Figure 1 to Figure 8 , a self-resetting variable friction damper, comprising:

[0040] A cylinder body 1 is a steel cylinder, including a cylindrical structure formed by two half-cylinders welded together, and the middle parts of the two half-cylinders are provided with grooves extending along the radial direction of the cylinder wall;

[0041] A baffle plate 5, in the shape of a ring, is fixed in the groove of the cylinder body 1 and has a through hole;

[0042] A sliding shaft 2 is a cylindrical solid steel rod that can relatively slide through the through hole of the baffle plate 5 and the first end of the sliding shaft 2 protrudes outside the cylinder 1; The central axis coincides;

[0043] Two fixed seats 9 are fixedly connected to the sliding shaft and located on both sides of the baffle plate 5;

[0044] A pair of damping mechanisms, connected to the sliding shaft 2 and located on both sides of the baffle 5, each damping mechanism includes an ela...

Embodiment 2

[0054] Please check Figure 9 , is another embodiment of the present invention, which is different from Embodiment 1 in that: the friction assemblies are two pairs, and the other pair of friction assemblies are respectively arranged between the elastic body 6 and the baffle plate 5; the elastic body 6 The two ends can bear against the friction components on both sides respectively. In this way, compared with Example 1, the number of friction components is increased, and the friction force provided by two pairs of friction components under the same loading conditions is theoretically double that of one pair of friction components. Therefore, Example 2 is comparable to Example 1. It has a stronger frictional energy dissipation capacity than

Embodiment 3

[0056] The difference between embodiment 3 and embodiment 1 is that the friction wedge 8 is made of powder metallurgy friction material, which has high friction coefficient, small wear, high strength, high temperature resistance, corrosion resistance and seizure resistance Good performance, less affected by oil and moisture. In short, among the existing friction materials, the stability and wear resistance of the friction coefficient of powder metallurgy friction materials are exceptionally outstanding, and the friction damper made of them as friction materials will have relatively more stable and reliable working performance.

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Abstract

The invention discloses a self-resetting friction-changing damper comprising a barrel, a baffle, a sliding shaft, an attachment joint, two fixed bases and a pair of damping mechanisms. The baffle is fixedly arranged in the barrel and provided with a through hole; the sliding shaft relatively slidingly penetrates through the through hole and a first end of the sliding shaft extends out of the barrel; the attachment joint is fixedly arranged at the first end of the sliding shaft; the two fixed bases are arranged on the bilateral sides of the baffle; each damping mechanism comprises an elastomer and a friction assembly, two ends of the elastomer are respectively abutted against the baffle and the friction assembly; the friction assembly comprises two extruding wedges and a plurality of friction wedges, the mutual opposite surfaces of the extruding wedges are circular cone guiding surfaces, and the friction wedges can be slidingly and circumferentially arranged between the circular cone guide surfaces of the two extruding wedges at intervals. By the self-resetting friction-changing damper, friction can be self adjusted according to the major structure displacement response, and a plurality of hysteretic curves can be displayed by adjusting parameters, and the self-resetting friction-changing damper has the function of self-resetting and strong engineering applicability.

Description

technical field [0001] The invention relates to a self-resetting variable friction damper. Background technique [0002] In order to reduce the dynamic response and damage accumulation of civil engineering structures under the action of earthquakes, strong winds and other disasters, vibration damping devices can be added to the structure to dissipate external input energy and protect the safety of the main structure. Friction dampers are a type of vibration damping device that uses friction between solid friction surfaces to dissipate vibration energy. At present, the common friction damper, because the positive pressure on the friction surface and the friction coefficient cannot be changed by itself, the hysteresis curve is mostly rectangular under repeated cyclic loading, that is, the sliding friction remains basically unchanged. For this kind of constant friction friction damper, the most critical issue in engineering application is how to determine the appropriate slidi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16F7/09E04B1/98
CPCF16F7/09E04B1/98
Inventor 梅真郭子雄黄群贤刘阳陈庆猛苏楠
Owner HUAQIAO UNIVERSITY
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