How much do you know about the commen sence of the bearings sealing devic?What types and role? Today we learn about it!
Generally said that the seal is to maintain good lubrication condition of the imported bearings inside, and prevent the cooling water, iron oxide skin, impurities immersed in the work surface to extend bearing life.
Because the mill bearing a seal bearing the most damage is near the site of the roller side of the trunk, bearing often is because the grease pollution, loss of parts of the surface wear, flake or even fragmentation, especially the infiltration of cold strip rolling mill emulsiongrease failure faster.
 Bearing the seal comes with two kinds of seal and outer seal. The external seal using a combination of labyrinth and contact design. Maze level more (not less than two poles), the better the smaller the gap sealed. The maze gap depending on the size of the bearing size to take radial unilateral 0.6 ~ 1.5mm; axial 4 ~ 6mm.
Contact skeleton oil seal in the mill used widely in order to increase the effect of two or three tied. But should be noted that the directional oil seal can not hold against. The hot rolling mill is generally installed two oil seals, two oil seal lip should be outside of the bearing to prevent outside dirt from immersion. Cold strip mill, however, generally installed within the three oil seal near an oil seal lip to the bearing to prevent grease spillover effects of roll quality. Be careful when using the oil seal, to avoid loaded roller crashed lip affect the sealing effect.
RBR type seal ring is a rolling mill bearing a special rubber lip seal ring in recent years has been widely used. RBR sealing ring axial seal lip attached to the surface of the base of the gland, without the bearings inside the old grease can roll beat overflow, external cooling water, iron oxide skin, impurities lip prevented from entering , a good sealing effect. Easy to use, roll roll changing load bearing are not affected.
 



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