NSK bearing lubrication method - bearing mill knowledge

The NSK bearings, lubrication methods roll NSK bearing lubrication in principle with the other rolling lubrication, just roll, NSK bearings working conditions is poor, its performance could get effective play depends largely on the NSK bearing lubrication. NSK bearings roll lubrication methods mainly include grease lubrication and oil lubrication. Grease lubrication grease and seal, seal structure and lubrication equipment simple, add grease is convenient, so as long as the work conditions allow, grease roll NSK bearings are generally used. Oil lubrication cooling effect is strong, and can be taken from NSK bearing inner dirt and moisture. NSK bearings roll lubrication oil lubrication methods have pressure oil lubrication and oil lubrication, oil mist lubrication and oil lubrication. NSK bearings pressure roll under oil lubrication is normal speed is the most effective way of lubrication. Oil lubrication is the lubricating oil at a certain pressure through the NSK bearings in one side of the spray nozzle into the internal lubrication for NSK bearings, NSK bearings normally used in high speed roll, or pressure oil supply lubrication can't satisfy the cooling requirements of the occasion. Spray lubrication is to contain oil mist dry compressed air into the NSK bearing lubrication for inside, use less oil, due to the effect of air, cooling effect is extremely strong, it is mainly used for high speed and high precision of rolling large NSK bearings roll, or for not often in the NSK bearing box sealed, NSK bearings roll. Pressure oil lubrication and oil lubrication needs to be installed into and out of the tubing, lubrication pump, oil reservoir, sometimes need to lube oil cooler, therefore, the cost is higher, NSK bearings roll less commonly use. Second, the configuration model ( 1) Early, spherical roller bearing NSK bearing in rolling mill rolling mill configuration pattern is different from now on, then mainly adopts NSK bearing with two sets of spherical roller installed on the same roll neck. This configuration type basic can meet the production condition at that time, speed up to 600 RPM. But with the improvement of speed, its shortcomings increasingly prominent: NSK bearing life is short, the consumption of large, low finished product precision and roll neck wear serious, rolling roller to leap into big, etc. ( 2) , four row cylindrical roller bearing NSK bearings + thrust cylindrical roller bearing inside diameter and the roll neck with tight fit, bear radial force, has a large load capacity, high limit speed, high precision, inside and outside the circle of separable and interchangeable, easy processing, low production cost, easy installation and disassembly, etc; NSK bearings carry axial thrust force, concrete structure could be selected according to the characteristics of the rolling mill to go. Overloading when low speed, thrust roller bearings, with small axial clearance to withstand the thrust load. When high speed, with NSK bearings, angular contact ball not only limit rotational speed is high, and axial clearance can be strictly controlled while working. Make close axial lead of the roll, and can withstand axial load force in general. The NSK bearings equipped with type NSK bearings not only has a long service life, high reliability, and rolling finished products of high precision, easy to control, and many other advantages, so the most widely used at present, more than used for wire mill, plate mill, cold rolling mill and foil mill, double support mill support roller hot rolling mill, etc. ( 3) NSK bearings, four row circular cone roller bearings taper roller can bear radial force, and can withstand axial force, no configuration NSK bearings, thrust so host appears to be more compact. NSK bearings taper roller diameter and the roll neck using loose fit, install and disassemble very convenient, but sometimes caused by loose fit slide creep, inner diameter often have spiral groove processing. This configuration type at present is still more widely used, such as four roller hot rolling mill and cold rolling mill work roll, roughing mill, steel rolling mill roll, etc.