The viscous fluid damper(VFD) is a damper device that uses a cylinder-type structure filled with a damping medium to drive the flow of the internal medium through the reciprocating motion of the piston to generate a damping effect, thereby converting kinetic energy into thermal energy.
When a viscous damper is used on a bridge, one end of the damper is mounted on the bridge and the other end is mounted on a pier or abutment, and displacement (speed) occurs at both ends of the damper under earthquake or wind loads.
The viscous fluid damper(VFD) is mainly composed of piston, cylinder block, end cover, seal part, damping medium and connector. The piston divides the cylinder into two chambers, during the reciprocating motion of the piston in the cylinder, the damping medium flows rapidly in the two chambers. The medium and the medium, the medium and the piston generate intense friction, the medium creates a large energy-saving damping as it passes through the piston holes, the resultant force of these effects becomes the damping force. The damping force generated in the flow, the ground vibration energy, is converted into heat by the reciprocating motion of the piston in the viscous liquid, so that the moving speed of the piston is gradually reduced to achieve the purpose of damping energy consumption.
Viscous fluid damper(VFD) are mainly used for bridges and high-rise buildings in earthquake, cross-sea bridges, footbridges and typhoon-prone areas.
Viscous Fluid Damper
1-end cover; 2-damping medium ; 3-cylinder block; 4-piston; 5-piston rod; 6-connector.
No leakage viscous damper
1-end cover; 2-cylinder block; 3-piston; 4-damping medium ; 5-oil feeding tank; 6-connector.
The Material And Standard Of Steel Elements
The damping medium of viscous fluid damper and no leakage viscous fluid damper is silicone oil, this fluid have the follow advantages:
BAOLI damper products should strictly meet the requirements of the design drawings, and the mechanical properties should conform to the EN15129 standard.
Product hysteretic loop
Energy dissipation testing
Install joints and piping for adjustment
Adjust until desire
Viscous fluid dampers(VFD) are typically designed to have a service life of more than thirty years and are maintenance-free. However, according to different occasions, emergencies, etc., the following maintenance management should be carried out:
Quotations are supplied on the basis of the types and numbers of the dampers required. We can also design if you proveded the follow information: