subject: The Introduction Of Spherical Roller Bearings [print this page] The introduction of spherical roller bearings
The mill configuration type of the early mill bearing is different from now; it was mainly use two self-aligning roller bearings and mount on the same roll neck side by side. This configuration type basically meets the conditions of production then and rolling speed is up to 600rpm. But as speeds increasing, the drawback is the more prominent: the bearing life is short, consumption is large, precision of the finished product is low, roll neck wearing is bad, axial movement of the roller is large, etc. This bearing is most common on the track machine.
The combination of four cylindrical roller bearings and thrust bearings, cylindrical roller bearings inside diameter tight fit with the roll neck have advantages of large load capacity, high limiting speed, high precision, inside and outside the ring is detachable and can be interchanged easily processed thrust bearing to withstand the axial force, the production is of low-cost, easy installation and removal.
When the heavy load is in low-speed, we set with thrust roller bearings to thrust load with smaller axial clearance. When in high rolling speed, together with the angular contact ball bearings, not only high speed is limited and the axial clearance can be strictly controlled, which makes roll get close axial guidance, and withstand axial load.
This bearing configuration type not only has a long life, high reliability, and has rolled products of high precision, easy to control, and many other advantages, so it currently most widely used for the wire rod mill, plate mill, ball mill, double support roller support roller mill cold rolling mill and hot strip mill.
Four-row tapered roller bearings can not only withstand radial forces, but also withstand the axial force, do not need to configure the thrust bearing, so the host is more compact.
