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 part), while the original roller bearing roller spherical bearing hinge axis partial lifting free design, Teflon slide switch from flat stainless steel plate between the slide and the finished ball bearing hinge, 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 cylindrical bearing) in place of the hinge shaft sliding spherical hinge bearings, and can reliably meet the requirements of the rotation bearing, and can significantly reduce the carriage structural height, reducing the overall amount of steel bearing. 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. Currently seismic steel ball bearings in China's construction industry has begun to gradually applied, and proceeded to develop appropriate industry standards: Building isolator "(Draft) The standard for building vertical and horizontal isolation bearing mechanical properties. Durability (aging, creep, fatigue performance), fire resistance and have all the performance requirements and determination made specific provisions. durability, including aging, creep and fatigue properties. seismic steel ball bearing durability requirements are placed on the stand with a wood fire and diesel fuel, the combustion removed after one hour, cooled to room temperature, the stress test its limits, and the rate of the same batch of vertical ultimate bearing stress change is not greater than 30% of the seismic isolation bearing steel ball relative performance refers to the vertical stress, deformation, load levels of stiffness and equivalent viscous damping ratio frequency and temperature conditions in our country this year to extensive use of seismic steel ball bearings for seismic bearings, spherical steel bearings called seismic, seismic ratio can also reach 0.15. seismic steel ball bearings in the chemical composition of commonly used steel, polymer content of at least 40%, reinforcing agents using charcoal black and white carbon black, and its content in the ash content of 10% to 45% outside the reinforcing agent is 10% or less seismic spherical bearing hinge |. spherical hinge bearings | rubber-Run-Run Company is provided by Hengshui Rubber Co., Ltd. . 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. working attitude and corporate excellence continuous improvement of innovative ideas will lead Guangrun Rubber Company and you work into the brilliant, for a better future! can also be accessed (www.grgcxj.cn/supply_details_41100050.html), for more information about the company.