A pressure-limiting external adjustable viscous damper

Abstract

The invention discloses a pressure-limiting external adjusting type viscous damper is composed of a damper outer cavity, an inner flow channel of pressure oil and an adjusting device, wherein the damper outer cavity comprises a piston, a piston rod, an outer end cover, an outer cylinder and the like, the inner flow channel of the pressure oil is composed of a piston rod wall small hole, a piston rod inner cavity, a throttling hole on a throttling seat and a valve core central hole, and the adjusting device is composed of a valve core, a throttling seat, a conical plug, a spring, adjusting nuts and an adjusting rod. Flowing of fluid is utilized to push the valve core to form a fluid channel with alternating variation, a design aim of externally arranging the adjusting nuts by adopting a left rotation nut, a right rotation nut and key connection, a pressure-limiting mechanism is formed by the spring and the conical plug, and the aim of adjusting the limited pressure is achieved by rotating the adjusting rod to change length of the adjusting rod.

Description

technical field [0001] The invention belongs to the technical field of dampers, in particular to a pressure-limiting externally adjustable viscous damper. Background technique [0002] Large structures such as high-rise buildings and long-span bridges will vibrate greatly under the action of earthquake or wind, and the large vibration of the structure will lead to the destruction of some of its components or the overall collapse. In order to reduce the impact of earthquake or wind on structures, oil dampers are widely used in building structures and bridge structures for energy dissipation and vibration reduction. The structure of the oil damper generally adopts the shear valve type. [0003] The vibration reduction effect of the damper depends on its energy dissipation capacity W. In a vibration cycle T of the structure: W=2Fx, where F is the damping force, and x is the stroke of the damper piston rod within a cycle of structural vibration. [0004] For the vibration cont...

AI Technical Summary

Problems solved by technology

However, the magnetorheological damper is made of magnetorheological fluid. The magnetorheological fluid is obtained by suspending iron powder in oil according to a certain process, and it will be obviously separated after standing for a long time (about six months to a year). Settlement, its settlement problem has not been solved

Magnetorheological dampers are expensive, and magnetorheological fluids are expensive

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