Ball bearing has the following advantages: (1) by a spherical ball bearing force transmission, and thus more evenly applied to the supporting concrete reaction force. (2) rotational torque of small ball bearings. Rotational torque and bearing only the spherical radius and sliding friction PTFE plate system, but not with the size of the bearing angle is independent of Datong universal grid finished hot seat, it is particularly suitable for the corner bearing, designed to play corner 0.05rad more. (3) ball bearing to rotate each consistent performance for a wide curve of the bridge and the bridge. (4) ball bearings are no longer used in the rubber bearing, rubber hardening or aging affects more bearing rotation performance does not exist, especially for low-temperature region. Ball bearing plane sliding friction mechanism with rubber bearing basin exactly the same. In the study of rubber bearing basin of PTFE plate and stainless steel plate (1Cr18Ni9Ti) friction has done a lot of testing, in order to enter [further reduce bearing friction and wear, PTFE ball bearing type board surface embossed with storage pit and grease painted 5201. Diameter test bearing PTFE sheet is 300mm. In the grease lubrication of the friction characteristics of PTFE sheet remained were similar with and without grease lubrication, the friction coefficient of the PTFE sheet with improved positive pressure decreases, after the first friction, the friction coefficient decreased to a stable value network universal rack mount, but the difference was the beginning of the initial value of the ratio and stability without grease dry friction is small. [Grid] bearing grid (net shell) bearing node structure should be able to ensure safe and reliable transmission of bearing reaction force, and therefore must have sufficient strength and rigidity. In the vertical loads, support node in general are under pressure, but in some kind of diagonal grid, the local node can withstand tensile force bearings, and sometimes may have to bear the effect of the level of force should be designed so that branch Block node structure to adapt to their mechanical characteristics. While bearing structure nodes should also try to meet the universal grid computing products bearing quotations assume fully reflect the design intent. [Grid] Since the grid holder (net shell) structure is statically indeterminate higher lever system, constraint node bearing a greater impact on the grid node displacements and member forces; constraints in the construction and design differences between the direct result of the member forces and support forces of change Shanghai grid universal holder of acceptable quality, sometimes resulting member forces change numbers. So the grid (net shell) design structure bearing the node should be given adequate attention. 3. Treatment of boundary conditions [grid] bearing a fixed boundary conditions, elastic restraint, oblique border and forced displacement. In the grid (shells) finite element calculations, the boundary conditions of internal forces and deformation of the grid structure will have a greater impact. Boundary conditions at both the supporting grid nodes and bearing structure, but also on the stiffness of the support structure and related support may be no sway, unidirectional and bidirectional lateral lateral hinge bearing support structure (column , beams, etc.) may be rigid or flexible. Universal grid bearing | Universal Products grid bearing Quote | manufacturers large supply of (certified merchants) provided by Hengshui Rubber Co. Guangrun. Hengshui Guangrun Engineering Rubber Co. (www.grgcxj.cn) (www.grgcxj.cn) is specialized in the "seismic steel ball bearings, spherical steel unidirectional bidirectional slide bearings, ball joints fixed elastic damping bearings," the enterprises, companies adhering to the "honesty, hard service" concept, to provide you with the highest quality products and services. Welcome to inquire! Contact: Mr. Wang.