Seismic steel ball bearing is an important component to connect the upper structure and the lower structure of the bridge, it will bridge superstructure min reaction force and deformation (displacement and rotation) is reliably transmitted to the lower part of the structure of the bridge, so that the structure of the forces consistent with the theoretical calculation of the drawings. Seismic steel ball bearings must meet the following functional requirements. First seismic steel ball bearings must have sufficient load-bearing capacity, in order to ensure safe and reliable transmission of support forces (vertical and horizontal forces). Second shaft seat on bridge deformation (displacements and rotations) constraints should be as small as possible, in order to meet the needs of the bridge body free expansion and rotation. Furthermore bridge bearings should be easy to install, maintenance and repair, and replace if necessary. Acting on the bearing reaction force, displacement and rotation in the Cartesian coordinate system can be respectively six and six displacement force open representation. Selection of bearing type must be determined according to the force applied to mount shrinkage and deformation of freedom. Because bearing displacements and rotations, it will generate an additional reaction force bearing bidirectional seismic steel ball bearing prices, bearing reaction force of the size and role of the corresponding change in the reverse happened. This requires the design is not a common type of bridge supports, for example, roller bearings, sliding bearings, plate and pot rubber bearings, spherical bearings and cylindrical bearings and other steel ball bearing manufacturers seismic grid to bridge bearings to minimize additional force displacement and rotation generated. 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, 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 section) unidirectional seismic steel ball bearing manufacturers, and Part of the original roller bearing roller cancellation, change into 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. Unidirectional seismic steel ball bearing manufacturers, steel ball bearings, 18831892621 Guangrun by Hengshui Rubber Co. project. 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!