Seismic steel ball bearing steel ball bearing seismic performance is set viscous dampers on both sides of the ordinary activities of laminated rubber bearing, while bearing normal use, the bridge beam deflection temperature, due to the slow speed of temperature change bits , viscous dampers almost no resistance to displacement, and in the earthquake, viscous dampers in the role of rapid earthquake seismic force ball bearing, almost displacement can not happen, will have a significant displacement of resistance, then the bridge The movable bearing as a fixed bearing, so that all the piers of the bridge to bear the full force of the earthquake, achieve the purpose of shock absorption. Viscous damper damping medium, usually using ultra-high viscosity silicone oil, to prevent leakage. Seismic steel ball bearings in general by the cylinder, piston and seismic damping materials unidirectional ball bearings, piston in the cylinder reciprocating do have the right amount of holes on the piston, cylinder built with viscous material. Structure under the action of earthquake seismic force and viscous dampers work together with the structure of import rod force, pushing the piston movement universal seismic ball bearings, pistons on both sides of the damping material produces a pressure difference, the damping medium through orifices , resulting in the damping force, to the purpose of energy dissipation. The internal structure of the damper varies, the speed index is generally between 0.1 to 1.0. Also damping force also with the piston area, the orifice size and length, cheer frequency, temperature, and other factors related to the damping material category. Viscous dampers and PTFE sliding bearing combination is also a common relief isolators. Low temperature test: seismic steel ball bearings which should be based on the ambient temperature region, respectively at -7, -15, -21, or performance test under -26 ℃ conditions. Abrasion and fatigue tests: seismic steel ball bearing wear and fatigue tests should be based reagents to determine the displacement and rotation should be considered 30-year fixed-seismic displacement and rotation ball bearings, according to the actual contact pressure, at 20 ℃ ± 8 ℃ temperature, relative displacement speed 63.5mm condition to make a test. The minimum distance between the damping unit test web at the center of the beam is set in the cradle for at 1.6KM, to set the damping unit at the bottom of the beam is 3.2KM. Seismic steel ball bearings in the design and analysis of the parameters, the need for seismic system type test, the test can be used to represent the actual structure of the performance parameters of the simulated sample. Analog-sized steel ball bearing seismic tests that must be met at the test requirements, these tests provide design features that can be used to extrapolate the actual size of the earthquake on steel ball bearings. Seismic steel ball bearing test should be tested at least two damping unit testing and full-scale simulation of the sample used in the design, the sample should include appropriate elastic limit system used in the design, if they stiffness and damping After the completion of all properties in the form of tests to meet the requirements, through the specimen after the type test can be used on the structure. Only when the power is limited by the test equipment can not be full-scale test, after approval by the engineer, was allowed to scale type testing. Fixed earthquake seismic ball bearings ball bearings _ _13482924139 provided by Hengshui Rubber Co. Guangrun. Hengshui Guangrun Engineering Rubber Co. (www.grgcxj.cn) (www.grgcxj.cn) strong, credible, Hebei Hengshui site construction materials industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Guangrun Rubber Company and you work into the brilliant, for a better future! You can also access (www.grgcxj.cn/supply_details_44690680.html), for more information about the company.