Aligning thrust roller FAG Bearings From a structural point of view, the tight ring of the bearing roller cage locked by the bushing into the separation of whole, but the live ring and the overall is separable. The lower bearing installed in the vertical by means of bearings, shaft and shaft the weight of other parts, so tight, not separated between the living circle. Both ends of the bearing of the upper and horizontal installation vertical installation, usually, the bolts will compress the end cap pressed back a certain distance (0.2-1mm), in order to avoid too small due to the clearance in The operation temperature difference caused by the phenomenon of bearing stuck. The gap appeared, such as the gap is too large, it will form a state of separation between the components and the living circle of the tight circle, so reasonable pretension to prevent the rolling elements spin and revolution skidding, you can keep rolling element raceway the correct position.
In order to ensure the normal work of NSK Bearings, necessary to impose a certain amount of axial load, the required minimum axial load:
Fa mim = Coz/1000
The fa mim ------- minimum axial load (KN)
The Coa ------------- Basic static load rating (KN)
2004, Benxi Iron and Steel Company mill hot strip mill 1700 supporting the production of thrust-aligning roller SKF bearing 292/500 bearing, the bearing face to face two sets installed in the mill backup roll to withstand the axial force. It face to face horizontally mounted bearing, in order to prevent the bearing from work, stuck with end cover bolts pressed after the release of more than 0.2mm distance. 2mm的配合间隙，在间断受力下，更易出现卡死，乃至使轴承另件" c="At the same time to avoid the work roll bending, thrust bearings to withstand the radial force, taken between the axle box hole and live ring outer diameter> 2mm with the gap, intermittent force, more likely to have stuck, and even bearing another " b="同时为避免工作辊弯辊后使止推轴承承受径向力，轴箱孔与活圈外径之间取>2mm的配合间隙，在间断受力下，更易出现卡死，乃至使轴承另件">At the same time to avoid the work roll bending, thrust bearings to withstand the radial force, taken between the axle box hole and live ring outer diameter> 2mm with the gap, intermittent force, more likely to have stuck, and even bearing another withstand local impact and damage.
After analysis, we believe that this compression method is unreasonable to think of ways, but only in the design of INA bearings side surface of the bearing ring studies, we designed eight uniform spring holes, installation of 8 diameter mm springs, each spring maximum spring force of 800 Newton, such bearings installed in the bearing and compression cover, due to the spring force first direct role in the bearing and the cover-side surface, so that when the journal in displacement to the left and right float, it can guarantee the correct position of the rolling element raceway. Roller and the raceway start to finish in good contact state. Preloaded purpose is basically to achieve under a rocky ledge axial force, the spring hole in the cylindrical Shaw in the role of the spring force, the first contact with the bearing and cover plate, the axial force had the buffer, so that the original KOYO bearings the damage been resolved, bearing life is greatly extended to meet the user requirements, users praise.
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