Plane friction coefficient at the design load (2MN) bearing is 0.0116. According to experimental data at home and abroad, in the lubricating grease at low temperature -40 ℃ when the friction coefficient of PTFE plate, about three times the normal temperature. Consider certain safety factor in the design, construction design ball bearing friction coefficient values ??as follows: room temperature (-25 ℃ above); μ = 0.03; low temperature (-25 ℃ ~ -40 ℃); μ = 0.05; when enough to overcome the friction torque is increased when the PTFE plate, bearing rotates happen. This torque is called the initial value of the rotational torque. After measuring ring bearing the rotated seismic unloading steel ball bearing, and stability to a smaller value, called the residual value of the rotational torque. The second load bearing so that rotation occurs, turn the torque was significantly lower than the initial value, and offloaded to the remaining value of the rotational torque. After several loads, bearing occurs stable rotating torque required to rotate to a certain value, this value is called a stable rotating torque value. The above phenomenon with PTFE plate and stainless steel inspection of the plane sliding friction consistent ball rotational resistance seen by the friction ball bearing crown between the liner and PTFE plate caused. After the ball bearing is rotated, measuring ring unloading, but not unloaded to zero, but unloaded to the remaining value of the rotational torque, the value is independent of the size of the rotation bearing, and during the test, as far as possible bearing angle continuously increasing large, but allows rotation of the bearing torque again, are more than the initial value of the rotational torque. Phenomenon described above ball bearings and bearing rotational torque to rotate independent of the size. Performance tests and finite element stress analysis by ball bearings, spherical bearing surface force transmission reliable, flexible rotation. It has a large pot rubber bearing load capacity, allow bearing large displacement, etc., but also better able to adapt to the needs of large rotation bearing. Bearing rotating torque M = N.μ.R BLKGZ seismic grid steel ball bearing, wherein R is a spherical tetrafluoroethylene friction coefficient, R is the radius of the spherical bearing. Bearing steel body with pressure-based seismic grid WJKGZ steel ball bearings, structural sizing can be safe. Bearing down concrete strength of not less than C40. Set a mesh reinforcement in local bearing area, and about the distribution of steel set a certain number of times within a height range in diameter bearing pad stone top surface to withstand concrete splitting tensile stresses. Due to the rotation of each ball bearing is extremely flexible (especially in small loads below), it is necessary to set up a temporary steel bolts GKGZ seismic steel ball bearings, the plant will be the upper and lower bearing plate together into a whole, and leveling in order to ensure the safety seat installation. Based on the above design principles, the country has designed a 1 ~ 20MN reaction force QZ series ball bearings, production design reaction force is divided into 16: 1,1.5,2,2.5,3,4,5,6,7,8 , 9,10,12.5,15,17.5 and 20MN. Bearing design displacement divided ± 50, ± 100 and ± 150mm several. Bearing design and 0.02rad 0.01,0.015 corner into three. Bearings to withstand horizontal forces: fixed bearing and bearing activities transverse vertical to the horizontal force bearing 10 percent. Curved sliding surface eccentricity vector by the following section and to determine: 1: eccentric moment caused by friction surface sliding coefficient of friction for the slide, r is the radius of rotation of the surface. 2: eccentric distance of the guide groove and the stop ring's sliding friction caused by the eccentric moment acts only on a seat adjacent to the structure, does not act on the carriage slide plate. Seismic steel ball bearings | KLQZ seismic tension and compression steel ball bearings | shock mount finished 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.