Lubrication and sealing of rolling mill bearings（part 1）

     The bearings used in For lubricant, in the bearing industry known as the "fifth component" of bearing, so to reduce rolling mill bearing consumption, it is necessary to choose suitable lubrication method and appropriate lubrication medium.

Rolling mill bearings are usually lubricated by grease lubrication, circulating oil lubrication, oil and gas (oil mist) lubrication and so on.In the early stage, due to the low requirements on the design and manufacturing of rolling mill equipment and operating conditions, grease lubrication was widely adopted because of the simple lubrication mode and process, convenient replacement of rolling mill bearing, low rolling speed, little influence of heating factors and low lubrication cost.For lubricant, in the bearing industry known as the "fifth component" of bearing, so to reduce rolling mill bearing consumption, it is necessary to choose suitable lubrication method and appropriate lubrication medium.

Rolling mill bearings are usually lubricated by grease lubrication, circulating oil lubrication, oil and gas (oil mist) lubrication and so on.In the early stage, due to the low requirements on the design and manufacturing of rolling mill equipment and operating conditions, grease lubrication was widely adopted because of the simple lubrication mode and process, convenient replacement of rolling mill bearing, low rolling speed, little influence of heating factors and low lubrication cost.pressure processing equipment are a kind of common standard parts in metallurgical equipment.The double and four row taper, cylindrical roller bearings and angular contact ball bearings which are used to support and position the two ends of the roll neck of the mill are replaced most frequently.Mill diameter bearing has the characteristics of large bearing capacity, impact and high speed, so its service life is much lower than that of general mechanical equipment.The rolling bearing life of rolling mill not only affects the consumption of equipment components and increases the cost, but also directly affects the normal operation of equipment, that is, affects the production efficiency of rolling mill.Therefore, to improve the bearing life of rolling mill is a problem that many metallurgical enterprises are concerned about and urgently need to solve.

    Based on years of experience in metallurgical enterprises, we have visited and consulted many related professionals in metallurgical enterprises, and inquired a large number of technical data at home and abroad. It is believed that most of the factors affecting rolling mill bearing life under normal working conditions are caused by rolling mill bearing lubrication (see FIG. 1).According to the statistics, the mill bearing damage caused by poor lubrication and sealing accounts for about 37% of the total bearing failure, which is the first of many reasons.