Speed ​​displacement double lock external adjustable viscous damper

Abstract

The invention discloses an external adjustable viscous damper with a function of speed and displacement locking. The external adjustable viscous damper comprises a cylinder block, a piston, a piston rod, vicious fluid, end covers, sealing seats, sealing rings, a piston rod shaft shoulder, a compression nut, a left limiting block, a right limiting block, a left limiting ring, a right limiting ring, a left outer pressure spring, a left tension spring, a right outer pressure spring, a right tension spring, a piston rod spool, a flow-limiting ring seat, a left adjusting nut, a right adjusting nut, a left inner pressure spring, a right inner pressure spring, an adjusting rod, a left inner sealing seat, a right inner sealing seat, a left inner sealing ring, a right inner sealing ring, a left inner end cover and a right inner end cover. The end covers, the sealing seats and the sealing rings are disposed at two ends of an outer barrel of the cylinder block. The left limiting block, the right limiting block, the left limiting ring, the right limiting ring, the piston rod, the left adjusting nut and the right adjusting nut are provided with throttle orifices. The external adjustable viscous damper has the functions of speed limiting, displacement limiting and pressure limiting, rigid contact between the piston and the cylinder block can be prevented, damping force is adjustable, and alpha value of the damping force F is reduced.

Description

technical field [0001] The invention belongs to the technical field of anti-vibration and vibration reduction of structures or bridges, and in particular relates to a velocity-displacement double-lock 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, such as figure 1 as shown, figure 1 Among them, 34 is a cylinder block, 35 is a piston, 36 is a piston rod, 37 is an orifice, and 38 is a viscous fluid. [0003] The vibration reduction effect of the damper de...

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Problems solved by technology

[0011] The purpose of the present invention is to solve the disadvantages that the damping force of the existing oil damper cannot be conveniently adjusted according to actual needs, and the damping force of the magneto-rheological damper can be adjusted, but the problem of settlement caking cannot be solved, and the cost is high. A new damper——speed displacement double lock external adjustable oil damper

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