A lubrication method
Lubrication of roller bearings and other lubrication of rolling bearings in principle basically the same, just poor working conditions of roll bearings, its performance can be effectively is to a large extent depends on the lubrication of the bearings.
Roller bearings lubrication method is primarily used with grease lubrication and oil lubrication.
And grease lubrication grease seal, seal and lubrication facility is simple, easy relubrication, if conditions allow, roller bearings are grease lubricated.
Oil lubrication cooling effect is strong, and took dirt and moisture from within the bearing. Lubrication of roller bearings with oil lubrication method for oil pressure lubrication, oil-spray lubrication and oil mist lubrication and oil lubrication.
Pressure for oil lubrication is the most effective conventional speed of roller bearing lubrication.
Oil-Jet lubrication lubricants to its pressure through the side of the nozzle mounted on the bearing into bearing lubrication, general application in high speed rolling bearings, or pressure lubricating oil supply can not meet the cooling requirements of the occasion.
Spray lubrication is dry compressed air containing oil mist spray to the internal lubrication of the bearings, using less oil, because of the role of the air, the cooling effect is very strong, mainly for rolling large roll of high speed and high precision rolling bearings, or for not regular removal of the roller bearings in the bearing box.
Pressure for oil lubrication and oil-spray lubrication requires installation of inlet and outlet tubing, pump and reservoir and sometimes need lubricating oil cooler, therefore, higher costs, roller bearings generally less.
B formula
(1), the spherical roller bearing
Early formula of rolling mill bearing in rolling mill and now is different, mainly uses two spherical roller bearings are mounted side by side on the same roll neck. This formula basically meet the prevailing production conditions, rolling speed of up to 600rpm. But as the speed increases, its shortcomings became increasingly prominent: short bearing life, consumption, low accuracy of finished products, roll neck wear serious, rollers axial motion.
(2) , four-row cylindrical roller bearings thrust bearings
Cylindrical roller bearings and neck inside diameter with tight fit, withstanding radial force, large load capacity, high limiting speed, higher accuracy, inner and outer rings can separate and interchangeable, easy processing, low production costs, convenient installation and removal advantages; thrust bearings are subjected to axial force, specific structural types can be selected according to the characteristics of rolling mill.
Heavy duty low speed, with a thrust roller bearings, with small axial internal clearance to accommodate thrust loads. When the rolling speed is high, supported by angular contact ball bearing not only high speed limit and strictly controlled axial internal clearance as you work. The axial guidance of the rolls to be close and could withstand axial load in General.
This formula not only has the bearing bearings long life, reliability, and mill products with high precision and easy to control, and many other advantages, it is currently the most widely used are used for wire rolling mills, plate Mills, foil, double bearing roller mill backup roll for cold rolling mill and hot.
(3), four-row tapered roller bearings
Tapered roller bearings can accommodate radial and axial force, do not need to configure a thrust bearing, so host looks more compact. Tapered roller and roll neck bearing diameter with a loose fit, mounting and dismounting is very convenient, but sometimes slide creep due to loose fit, therefore bore machining spiral oil Groove.
This formula is being applied is still broad, four-high hot-rolling mill and cold rolling mill work roller, roller for roughing mill, steel mills and other occasions.