Since the 21st century, our seismic steel ball bearing technology, there has been developing very fast. Especially with the construction of passenger dedicated railway, bridge bearings from the bearing type, bearing both tonnage and improve processing quality bearings. Appeared in various forms of high-profile seat and seismic support. Yangtze river bridge on the railway bearing vertical bearing capacity of the largest steel ball has reached 180MN, Chaotianmen Bridge on the road with a vertical seismic bearing capacity of the ball bearing steel 145MN. Processing quality from the railway bearing materials, precision machining, surface protection were significantly improved in all aspects. Reappeared with a skateboard bearing high pressure, high speed abrasion resistant modified ultra high molecular weight polyethylene material. So far, the basin-type rubber bearing Maximum tonnage reached 6500KN (Nanjing Bridge) seismic steel ball bearing technology parameters, seismic steel ball bearings have been used to mount the largest tonnage bridge 13000kN (Shenyang muddy enriching River Bridge). Seismic steel ball bearing is by rolling, shaking and sliding steel parts needed to complete the displacement and rotation of the bearing, which is characterized by strong bearing capacity, and the need to adapt to the displacement of rotating bridge. Before the 1960s, seismic steel ball bearings are commonly used on our roads and railway bridges. Seismic steel ball bearings using carbon steel or high quality steel through molding, foundry, casting, heat treatment, machining and surface treatment is made. Common with flat seat, curved seat, rocker shaft bearings and roller bearings and other types. Seismic steel ball bearing large carrying capacity, but its structure size is too large, the amount of steel consumption and more power transmission line bearing not fluent, forceful necking, and seismic steel ball bearings easily corroded, high maintenance costs, repair more difficult. Seismic steel ball bearing steel ball bearing seismic performance is set viscous dampers on both sides of the ordinary activities of laminated rubber bearing, bearing normal use when the temperature displacement of Bridge Beams Guangrun brand quality steel ball bearings due to temperature change bit slow, viscous dampers almost no resistance to displacement, and in the steel ball bearings Earthquake professional this offer, viscous dampers in the role of rapid earthquake forces, hardly displacement occurs, have a great resistance to displacement, this time into a bridge abutment fixed bearing activities, 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 generally consists of a cylinder, a piston and a damping material steel 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 of the piston on both sides of the damping material produces a pressure difference, the damping medium through the orifice, resulting damping force, to energy dissipation purposes. 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. Steel ball bearings, steel ball bearings positioned seismic activity, Guangrun Rubber Company (certified merchants) provided by Hengshui Rubber Co. Guangrun. Hengshui Guangrun Engineering Rubber Co. (www.grgcxj.cn) is specialized in the "seismic steel ball bearings, spherical steel unidirectional bidirectional slide bearing, fixed-elastic damping ball bearing hinge" of the enterprise, the company is adhering to the "integrity management , hard service "concept, to provide you with the highest quality products and services. Welcome to inquire! Contact: Mr. Wang.