|Diameter||15 mm to 40 mm|
The crucial part of Viscous Hydraulic Damper
is a hydraulic device. It includes connective components, guides, pistons, damping vents, cylinders, sealers, and damping mediums, etc. Its basic mechanism is that structure under seismic or wind load, the adhered damper guide will be enforced to push piston moving. The viscous liquid at both sides of piston shall form pressure difference and drive damping medium (liquid) passing through damping vent. Thus a damping force is created. Some of the structure's vibration energy shall be consumed by the viscous liquid to realize suppressing vibration (seismic or wind vibrating) reactions.Characteristics and Application Status:
The research on controlling vibration on the structure by viscous hydro-damper arose in 1980's. US and Japan are leading in this filed. So far, there is numerous engineering project applying viscous hydro-damper, including high buildings, bridges, railways, gymnasiums, oil rigs as well as satellite launching towers.The viscous hydro-damper fitting on engineering projects profits from is the remarkable performance. Under the static condition, it has no initial stiffness and causes no affects for structure's calculation on vibration period, mode, etc, and no other unforeseeable side effects. It shall not cause annexed interior force due to temperature change, shrinkage or creeping create slow flexible deformation on structures. But to sharply deformation, it can absorb energy swiftly, and reduce acceleration and displacement on structures.The viscous hydro-damper also features small bulk and weight, easy for installation, slightly relating to inspiriting frequency and temperature, sound endurance, etc.Their viscous hydro-dampers have applied on Nanjing bridge, Guangxi.Installation:
First, to fix the bi-forks on structure components by using bolts. The bi-forks may be selected from the following table or designed as per actual requirements. The inserted bearing enables the installation to deviate angle with ±5. Thus, it simply needs to adjust piston to adequate position and firmly erect pins and forks.