Our country is a country of many earthquakes occur in the event of an earthquake jingchan bearing lateral baffle and anchor cut phenomenon. After the 2008 Wenchuan earthquake, a lot of bridge bearings occurred anchor cut, to restore the bridge after the earthquake brought difficulties Baocheng Railway. How to ensure that in the event of an earthquake bridge support work performance, so do not destroy the bridge bearings or minimize damage, and after the earthquake bearing function can be restored as soon as possible, this is a topic of current research needs. Seismic steel ball bearings to withstand earthquake forces, there are usually two alternative ways, one way is to increase seat anchors, it is sufficient to withstand seismic shear slip bi-national standard ball bearing caused by an earthquake, this When will all pass by seismic forces to the pier-way scroll bearing seismic quality ball bearing GB, it may cause damage to the pier, so that a small amount of displacement of the bearing can occur, but does not occur off the beam, and the bearing bolt does not occur cut, so you can reduce the effect of seismic force appropriate to the pier. For this purpose it is necessary to study one kind of seismic steel ball bearings. Qiantang River Bridge is 45m + 65m + 14 × 80m + 65m + 18 holes 45m prestressed concrete box beam bridge ties, length of 1340m, located only two fixed piers in the middle of a full-bridge, full bridge longitudinal horizontal seismic force of will be undertaken in the manufacture of friction by setting the two fixed bearing and fixed on each pier to pier on the resistance activities, for in addition to setting up the necessary bridge design seismic stoppers, the use of seismic steel ball bearings. Increase in bearing steel ball bearings with a choice of materials earthquake raised steel ball bearings with seismic bearings should have the following characteristics, steel bearing liquid way through the bottom of the hydraulic pump implanted seismic steel ball bearing, bearing jacking pressure plate, is bearing elevated pressure injection of steel should be automatically fixed, the pressure part of the carrier; should have a certain pressure injection compressive strength and elongation of the cured rubber; seismic steel ball bearings should have good process performance; the pressure injection process rubber has good mobility, pressure injection after the completion of natural rubber should be cured within 1 to 2 hours; reasonable pressure injection rubber prices increase to reduce costs. At present, foreign pressure injection of silicone rubber as the material. Silicone rubber is a polymer organic elastic condensation from various silicone. Silicone rubber due to the special structure of the molecule structure, which has a series of very excellent performance, is a hardy both high temperature synthetic rubber, operating temperature up to -100 ℃ -300 ℃, and has very good resistance to ozone aging, heat aging and weather-resistant properties. But the tensile strength of the silicone rubber only 2 ~ 10Mpa, elongation at break of only 150 to 200%, and the silicone rubber extremely expensive, about 10 to 27 times the natural rubber and synthetic rubber, polyurethane rubber 4.5 times, it is necessary to choose a filling meet the requirements of high strength, relatively cheap alternative to rubber, the comparison may consider polyurethane rubber. Seismic steel ball bearing according to the different monomers, urethane rubber can be divided into two kinds of polyester and polyether, can be divided according to the processing method of casting, mixing type and a thermoplastic categories. Polyurethane has high mechanical strength Order bidirectional ball bearing seismic activity, the tensile strength of up to 70Mpa, elongation at break of up to 500% to 1000% excellent aging resistance, excellent ozone resistance, wear excellent performance, and the price is only 1/4 to 1/5 of silicone rubber. bidirectional slide ball bearing manufacturers offer earthquake _ _ ball bearing factory direct quotes 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_49043875.html), for more information about the company.