Slotted cylinder variable frication damper

Abstract

The invention relates to a slotted cylinder variable frication damper which can be applied to building structure vibration reduction control and engine vibration reduction. The damper comprises a cylinder barrel, a frictional ring and a sliding axle, wherein a vertical slot is arranged at the middle part of the cylinder barrel; the internal diameter of the cylinder barrel is equal everywhere; thefrictional ring is arranged in the vertical slot of the cylinder barrel and aligned with the center of the vertical slot; the size of the vertical slot along the length direction of the cylinder barrel is larger than the axial length size of the frictional ring; the external diameter of the frictional ring is slightly larger than the internal diameter of the cylinder barrel; the frictional ring has the compressibility; the cylinder barrel has the expansibility; the axes of the frictional ring and the sliding axle are superposed and connected into a whole; and one side of both end surfaces of the frictional ring facing towards the inner wall of the cylinder barrel is provided with a circular arc chamfer. The damper can simultaneously meet the vibration reduction requirement during the strong vibration and the weak vibration of building structure.

Description

technical field [0001] The invention relates to a slotted cylinder variable friction damper, which can be applied to vibration reduction control of building structures and vibration reduction of locomotives. It can also be used to make dampers in aerospace, electronics, chemical industry, energy, instrumentation, medical treatment, sanitation and other fields. Background technique [0002] The friction damper is a kind of control device that utilizes the friction energy dissipation of the friction surface to dissipate the vibration energy. The core part of a common friction damper is one or more pairs of friction surfaces with a certain preload. The external force needs to overcome the friction between the friction surfaces to drive the relative motion of the friction surfaces of the damper. The main drawbacks of conventional friction dampers include: [0003] 1). The friction surface of a general building friction damper is always in a state of high precompression stress....

AI Technical Summary

Problems solved by technology

[0003] 1). The friction surface of a general building friction damper is always in a state of high precompression stress. In this long-term high stress state, the friction coefficient of the friction surface may change, deviating from the expected design working state

[0004] 2). The preload and properties of the friction surface of a general friction damper cannot be changed automatically, so the friction resistance provided by it usually remains unchanged, and the hysteresis curve of the damper is close to a rectangle

Since the intensity of the earthquake action faced by the building structure cannot be accurately predicted, there is a problem that strong vibration and weak vibration cannot be taken into account when using this type of friction damper as a vibration-absorbing component in the building structure.

Images