Pressure intensity mechanical and automatic adjustment viscous damper

Abstract

The invention discloses a pressure intensity mechanical and automatic adjustment viscous damper and belongs to the technical field of structural vibration reduction. A damping medium is ejected through damping holes formed in a piston to flow to generate damping force, so that the vibration amplitude is rapidly reduced and the input vibration energy is consumed. A liquid through tube is a round tube; the lower portions of the two ends of the liquid through tube are welded to a left main cylinder and a right main cylinder correspondingly; a pressure block valve is disposed in the middle of theliquid through tube; a spring is connected with the pressure block valve, and a prepressure is set; the damping medium of the left main cylinder and the right main cylinder is blocked by the pressureblock valve; and when the force, generated in the liquid through tube, by the pressure intensity difference of the damping medium of the liquid through tube is larger than the prepressure of the spring, the liquid through tube is in a connected state. The pressure intensity mechanical and automatic adjustment viscous damper is simple in structure, the pressure intensity is adjusted through a mechanical device, all parts and accessories can be pre-fabricated and machined in a factory, the damper is economical and reasonable, the stability of hysteretic curve can be guaranteed, the vibration-reducing protection effect is better, the security coefficient is higher, the structural durability is high, and the damper can be used for a long time.

Description

technical field [0001] The invention relates to the technical field of structural damping, in particular to a mechanically self-adjusting pressure viscous damper. Background technique [0002] The viscous damper generates damping and dissipates vibration energy through the flow of the damping medium in the damping hole. It has the advantages of low maintenance cost, etc. It has a wide application prospect in the anti-seismic and wind control of civil engineering structures, and it is widely used in the anti-seismic reinforcement of existing buildings or post-earthquake repair projects and new projects, and has achieved good results. . The basic formula of the viscous damper is F=CV α , where F represents the damping force, C is the damping coefficient, V represents the speed of the piston movement, and α is the speed index. It can be seen from the formula that the viscous damper belongs to the velocity type damper, and its velocity index directly affects the energy dissip...

AI Technical Summary

Problems solved by technology

Therefore, when relative motion occurs at both ends of the viscous damper, its fluid mechanical properties will change greatly, so that the relevant parameters C and α of the viscous damper will change greatly. The calculation models of viscous dampers are very different. Even through refined analysis, the changes in mechanical parameters before and after the difference may lead to unpredictable redistribution of internal forces, and even cause structural unsafety.

Due to the use of controllers, sensors, and solenoid valves, the possibility of circuit failures is greatly increased, and troubleshooting and maintenance are very inconvenient

In addition, controlling the opening or closing of the damping hole through the solenoid valve cannot reduce the pressure value in the two master cylinders, nor can it protect the safety of the cylinder body and the sealing system.

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