Ball bearing large tonnage entity bearing rotation test. From 1990 to 1991 the first ball bearings in Shanghai and Beijing to promote the application of some key projects damping steel ball bearings, they are: Shanghai Nanpu Bridge, the main bridge 10MN fixed bearing 4; Beijing West Wing project Guanganmen, day 3,6,7,8,10 and 12.5MN using multi-directional movable bearing 29 and so on Ning Temple and CaiHuYing three overpass. To ensure the quality of national key construction projects, in addition to the product sampling, the decision on the first use of the ball bearing rotates test bearing entities, for which has in November 1990 and January 1991, the Chinese test Technology Research Institute on Dayi test site 50MN standard dynamometer, 10MN fixed bearing on the Nanpu Bridge and overpass 8MN Guang'anmen conduct more tests to rotation bearing activities. Shanghai Nanpu Bridge, the main bridge design ball bearing reaction force 10MN, design corner 0.035rad, consider a corner after increasing 1.2-fold factor to allow for maximum bearing corner 0.042rad, bearing design corner friction coefficient is 0.03. The seat Also China Testing Technology Research Institute conducted a test base Dayi entity bearing rotation test. Because the fuel tank leak test machine, a positive pressure is applied only to 6.110MN. Found carriage initial rotational torque 251.50kN.m, corresponding to the initial rotational friction coefficient μ = 0.0135, less than 0.03. Rotating torque is stabilized as 63.71kN.m, the corresponding rotation of the friction coefficient of μ = 0.0034. Ball bearing and rubber bearing basin are axially symmetric body, and can be used to understand the bearing steel body and its supporting concrete stress distribution symmetric finite element stress analysis through the shaft. In order to understand the distribution of different ball bearing stress and its impact on the radius of curvature of the supporting concrete stress distribution, the radius of curvature of the sphere were three stress analysis. The actual bridge bearings supported on piers on the desk top to take concrete, concrete will happen after bearing pressure elastic compression, bearings will deform together with concrete, bearing in elastic support state. Take joint action to double the height of the concrete abutment diameter D, the width of the scope to take account of local pressure 1.5D. Design stress ball bearing PTFE plate is usually high, so acting on the support of the local concrete bearing stress is high. For this reason the general requirements in concrete grade C40 above. Center of the visible portion of the horizontal cross section of the concrete under pressure bearing best damping steel ball bearing manufacturers, steel parts of the concrete basin edge tension, pull the bearing pressure with spherical radius R increases. In the center of the vertical cross-section seat height range within about 0.125D, concrete compression zone for the following parts of the concrete in tension damping buy steel ball bearing manufacturers preferred customers, under the maximum tensile stress displacement bearing 0.3D ~ 0.375D place. The principal tensile stress cracking, you must double the diameter of the height range grid damping steel ball bearings supporting concrete finished in the top surface of the seat and arranged appropriate mesh reinforcement. Based on the above finite element stress analysis, show the main bearing steel body with pressure, the design can be constructed size. The best damping steel ball bearing steel ball bearing manufacturers _ _ damping damping bearing finished by Hengshui 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!