The seal is to maintain good internal lubrication, and to prevent the cooling water, scale, immerse the impurities of working surface of bearing service life. Due to high temperature sealing roller bearings, bearing damage is the most close to the barrel side parts, bearing is frequently because of the lubricant pollution, erosion, make parts work surface wear, spalling and fragmentation, the failure of grease faster.
Seal is divided into self seal and outer seal two kinds of inch bearing. External seal mainly uses the design of labyrinth and contact combination. Maze level more (not less than two) gap smaller seal effect to be better. Labyrinth clearance according to the bearing size and radial unilateral 0.6 ~ 1.5mm, 4 ~ 6mm; axial.
Contact skeleton oil seal: it is widely used in the mill, in order to increase the effect can be two or three parallel use. The oil seal has the directivity, not anti loaded. The hot rolling mill general attire two oil, two oil seal lip mouth must to the bearing seat outside, prevent the outside dirt into the. An oil seal lip usually installed three seals bearing cold strip mill near the mouth to inward, to prevent the effect of rolling material quality lubricant overflow. Be careful to use the oil seal, avoid installed roller damaged lip, sealing effects.
RBR type sealing ring: This is one kind of tapered bearing special-purpose rubber lip type seal ring, and is widely used in recent years. The RBR sealing ring adopts an axial sealing way, the mouth is affixed to a surface, not affected by roll beating, old fat inside the bearing can overflow, cooling water, scale, impurities are prevented from entering the outer lip, with better sealing effect. And easy to use, change when you roll into roller bearing without any influence
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