Seismic steel ball bearings are improvements made in steel ball bearings on the basis of a form bearing. Because steel bearings in use, often in the displacement roller tilt, can not be restored in situ, to the holder of the maintenance and repair of a great deal of difficulty. Such as roller bearing roller Nanjing Yangtze River Bridge handsome and can not be reset Guangrun ball joint bearing full-featured, but also occur even Xuan roller pin cut phenomenon. To overcome these shortcomings roller bearing, in recent years, the development of a slide hinge stand that retained the original roller bearing upper part (ie hinge part), while the original roller bearing roller Axis partial lifting of quality two-way ball joint bearing manufacturers offer a switch from flat Teflon and stainless steel slide between the slide, thus to meet the needs of bearing displacement. The seat is now used in some types of long-span steel bridge and concrete bridge use. Since seismic steel ball bearing, mainly through the hinge axis, the force acting on the carriage top plate, should be rigid angle (35 ℃ ~ 45 ℃) diffusion at the center of the hinge shaft is passed, and then down to a rigid corner (35 ℃ ~ 45 ℃) diffusion is passed to the top surface of the slide bearing, so that the force can be evenly PTFE plate, thus bearing the overall structure is still great height, bearing a large amount of steel. Indeed if the force transmission surface contact of ball bearings (or bearing cylinder) instead of the hinge axis, and can reliably meet the requirements of the rotation bearing, and can significantly reduce the height of the bearing structure, reduced branched The overall amount of steel seat. Seismic steel ball bearing steel bearing using ZG230-450II and ZG270-500II, with its mechanical properties and chemical composition should be consistent with "carbon steel castings classification and technical conditions" (GB979) requirements. Seismic steel ball bearings should be normalized, the removal of the gate and welding repair should be carried out before the heat treatment. The main parts of the force does not allow the casting cracks exist. Seismic steel ball bearings in the late 1980s from the development in the United States, and is mainly used for house building structure. The nature of seismic steel ball bearing friction damping also supports, but it relies on two friction bearing surfaces to achieve normal function. Lower bearing plate bearing is a large concave spherical surface, the center portion of the seat when the earthquake seismic steel ball bearing. Along the concave spherical bearing plate swinging displacement occurs, the use of a simple pendulum mechanism to extend the natural cycle of the lower part of the structure, to reduce the effect of seismic forces, while a sliding ball joint mount buy cheap at the time of the earthquake Which swing When the panel along the lower ball bearing swing, ball panel elevation changes, the superstructure is raised, acting through the potential to achieve the purpose of energy consumption of an earthquake. Ball bearing swing panel after the earthquake, will be automatically reset by the weight of the upper structure. Holder can be slid in any direction, whose maximum size is primarily controlled by the design displacement. Quality two-way ball joint bearing manufacturers offer | ball joint bearing | Guangrun provided by Hengshui Rubber Rubber Co. Guangrun. Hengshui Guangrun Engineering Rubber Co. (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!