Seismic steel ball bearings _ quality product manufacturers _LKQZ-II type seismic steel ball bearings provided by Hao-engineering rubber. Seismic steel ball bearings _ quality product manufacturers _LKQZ-II-type earthquake ball bearings are bearing the mechanical properties of steel highway bridges ball HaoTong our Hengshui Rubber Co. (www.htgcxj.com) 2014 年 launched a new upgrade Experimental studies, mainly in order to develop and revise highway bridge design specifications and provide a reliable basis for the transportation industry standard two conducted several trials research work in the country has undergone experimental study follows three main phases. Pilot phase ball bearings and started to explore the early 1980s, ball bearings appear nearly ten years and applied in our country, and in the roads and bridges have been widely applied LKQZ-II seismic steel ball bearings However, rough design calculations in bridge design specifications related to the content of the provisions of ball bearings, but also our own rubber bearing no product standards, therefore, to amend the 1975 bridges and culverts norms, from November 1980 to 1982 In March Shanghai Municipal Engineering Design Institute under the China Highway Planning and Design Institute (formerly the Ministry of Transportation Planning and Design Institute) commissioned chaired the four categories, 51 kinds of different specifications of the 155 KLQZ type of seismic steel ball bearings, the smallest form factor for a .75 WJKGZ steel seismic steel ball bearings and a maximum of 15.87, a flat area of ??100mm × 140mm, the largest experimental study of small-scale 150mm × 200mm rectangular ball bearing. By testing the mechanical properties of ball bearing have a better understanding for the selected design parameters amendments provide tangible basis. Use ball bearing Attention, design, design units currently found in some of laminated rubber bearings and bridge and culvert design specifications, industry standard design requirements do not match. Such as flat-size design is very large, but the thickness of thin bearing, ball bearing checking the projects carried out in accordance with the relevant provisions of the bridge specifications and industry standards, and its compression deformation, rotation performance can not meet the requirements, the more shear deformation small seismic steel ball bearings, even as the use of fixed bearing, ball bearing must also meet the requirements before end of the beam angle. Such a ball bearing, in the course of Void and prone to accelerated aging, causing the ball bearing damage early, so, JT / T 4-2004 stipulated in the measured bearing angle value, rubber bearing reinforced concrete greater than or equal 1/300 bridge, steel bridge greater than or equal to 500x, and production at the factory and production licenses issued, as the content of the test must be carried out. In addition, designers in the selection of laminated rubber bearings, the ball bearing bearing capacity and the actual bridge support reaction force should be consistent with the general range of about 10 percent of excellence, you can meet your request, not a choice seat bearer The larger carrying capacity than the actual force needed more security, ball bearings, especially when selecting ball bearings, the bridge should be as close as possible the actual capacity, because PTFE sheet and endless dry plate friction when positive pressure decreases with increasing big.