Ball bearing seismic damping bearing Product Overview: WQGZ-II series is based on the seismic damping bearing People's Republic of China Communications Industry Standard "highway bridge rubber bearing basin" (JT391-1999) and Highway Engineering Seismic Design Code (JT004-89), in WQGZ basis (I type) on a series of seismic damping bearing, after detailed statics, dynamics analysis developed from a new type of seismic damping steel bearing. WQGZ-II series of seismic damping bearing relatively WQGZ (I type) seismic damping bearing structure is more reasonable, more reliable performance and longer service life. Ball bearing WQGZ-II series seismic damping mount includes a fixed bearing, vertical bearing activities, three types of multi-directional movable bearing, bearing specifications are divided into 22 grades, vertical design bearing capacity, design angle, friction coefficient according to the relevant design standards. Their level of capacity, the overall strength of the vertical pulling force than ordinary bearings and bearing a substantial increase. The series bearing elastic damping element, with a clear mechanism of clear, stable structure parameters, excellent damping performance characteristics. The principle is horizontal damping force to a certain extent, the damping spring is elastically deformed to achieve start buffer. When the structure of the corner, the ball rotates core produce and release the torque generated by the upper structure. When the earthquake, rigid and flexible measures seismic damping measures at the same time play a role, in order to resist the huge earthquake input energy. In a large earthquake fluctuations, both to ensure the bridge, under construction between reasonable relative displacement amplification factor decreases seismic forces, but also to keep the structure unity. The bearings can withstand earthquakes 8-11 degrees, especially for highly seismic zone earthquake epicentral area of ??engineering structures have good shock damping effect. The family seat is suitable for large-span spatial structure and large-span bridges, especially for wide bridge, curved bridge, the bridge of engineering structures especially for high-intensity earthquake zone. The series has been staged in the Ministry of Construction Research Institute of Metallurgical Engineering Structures Laboratory, Shijiazhuang Railway Institute of Engineering Structures Testing Center, Shanghai Tongji Construction Engineering Quality Inspection Station, Guangzhou University Earthquake Engineering Research Center of qualified testing. Ball bearing seismic damping bearing design and manufacturing principles: Build evenly structured, both in plane or facade structure layout, have sought to make the geometry, stiffness, ductility uniformly structured, improve the strength and ductility of the structure and components. Multi-channel vibration defense. Prevent brittle and unstable failure. Prevent material aging. High-quality manufacturing and installation. Ball bearing bearing bearing seismic damping material: stainless steel, Teflon slide, rubber seals, etc. according to JT391-1999 standard regulations, which damping spring automotive leaf spring technology by QCn29035-91 conditional execution. Cast by GB / T11352-1989, GB / T14408-1993 standards. Advantages ball bearing bearing bearing seismic damping: the use of spherical contact bearings, large contact area, low pressure, mass force uniform, small, small amount of steel. Be universal bearing can withstand the pressure, shear forces and pull in any direction. Can be universal rotation, to release the bending moment in any direction. Supports use of damping spring, damping required to meet the high intensity area of ??engineering structures. Force components are made of bearing steel, in 200 years, there is no problem of aging. PTEF products bearing used, the friction coefficient is small, aging resistance, low temperature up to -150 ℃, to ensure that the universal bearing rotation flexibility and application in cold northern regions. Supporting Force focused, clear and not change with the angle. The role of the lower bearing structure (column, pier) by force. Supports dynamic and static rigidity, ensuring the smooth operation of the vehicle. Seat height is low, favorable structural design of the bridge. Ball bearing seismic damping bearing performance parameters indicators: Vertical Bearing Capacity: 500-80000KN vertical pullout: 500-80000KN horizontal shear: 500-80000KN above three types of force can be used to select the appropriate combination, but the situation to be subject to a special review of the design time. Design corner: 0.01-0.06rad (equivalent to 0.57 ° -3.44 °) Friction coefficient: μ = 0.03 (room temperature -25 ° ~ 40 °) μ = 0.05 (low temperature -60 ° ~ 25 °) elastic coefficient calculation basis having the overall project chosen to achieve the internal forces in a static state of uniform, reducing the peak stress under dynamic action role. 

keywords: Ball bearings, ball bearing damping, unidirectional damping ball bearing,