Viscous dampers with pressure relief

Abstract

The invention discloses a viscous damper with a pressure relief device and relates to the field of dampers. The viscous damper comprises a first cylinder body, a first connecting ring, a piston and the pressure relief device; the first cylinder body comprises a closed cavity with damping fluid; the first connecting ring is located on one side of the first cylinder body; the piston is located in the closed cavity, can move in the closed cavity back and forth and comprises a through hole which penetrates through the piston and is formed in the moving direction of the piston; the pressure relief device is arranged in the piston and comprises two or more pressure relief valves with valve bodies, flow jet holes formed in one sides of the valve bodies and flow guide holes formed in the valve bodies and in the other sides of the valve bodies, the pressure relief valves exert pressure on the valve bodies, one or more valve bodies receive the damping fluid pressure opposite to the pressure exerted by the pressure relief valves when the piston moves in the closed cavity back and forth, and the valve bodies are opened or closed correspondingly when the damping fluid pressure is greater or smaller than the pressure exerted by the pressure relief valves. The viscous damper is low in cost, has the function of a locking device and the function of a common viscous damper and can be freely switched between the two functions.

Description

technical field [0001] The invention relates to the field of dampers, in particular to a viscous damper provided with a pressure relief device. Background technique [0002] Viscous damper, as a structural protection system, is the most widely used and most successful vibration damping device at present. This is particularly evident in the field of bridge engineering. The application of viscous damper shock absorption technology has greatly improved the safety reserve of the bridge, improved the overall dynamic performance of the current long-span bridge, and can play a good role in the event of an earthquake. energy consumption. [0003] In recent years, in order to control the impact of earthquake, vehicle vibration and wind-induced vibration on large structures, improved locking devices based on viscous damper technology have been widely used. When the relative movement speed of the structure at both ends of the damper is low, such as The structure is allowed to deform ...

AI Technical Summary

Problems solved by technology

[0006] Due to the frequent action of vehicle loads, earthquakes are sporadic. If only viscous dampers with large damping coefficients are installed to cope with the effects of vehicle loads and earthquake loads at the same time, the viscous dampers will not affect the vibration generated by vehicle loads. In addition to the poor effect, the damper will also be under the repeated action of the vehicle load, and the piston rod will move back and forth repeatedly, which will reduce the durability of the seal and greatly reduce the service life of the damper.

Images