Equipment type of common rolling mill bearings

Source: China Bearing Network Time: 2013-05-17

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(1). Spherical roller bearings; the equipment type of the early rolling mill bearings on the rolling mill is different from the current one; at the same time, two sets of spherical roller bearings are used side by side on the same roll neck. This type of equipment is completely satisfied with the production at the time. Conditions; rolling speed up to 600 rpm. But with the advancement of speed; its defects are more and more outstanding: short bearing life, large cost, low precision of the product, severe wear of the roll neck, large axial roll of the roll, etc.
(2). Four-row cylindrical roller bearing + thrust bearing; cylindrical roller bearing inner diameter and roller neck selection tight cooperation; receiving radial force; with large load capacity, high limit speed, high precision, inner and outer rings can be separated and can be exchanged, simple processing The production cost is low, the device is easy to disassemble, and the thrust bearing receives the axial force; the detailed layout type can be selected according to the characteristics of the rolling mill. When the heavy load is low speed; with the thrust roller bearing; with the smaller axial direction Clearance to accept thrust load. When the rolling speed is high; with angular touch ball bearings; not only the high speed limit; and the axial clearance during operation can be strictly controlled. The roller is tightly guided axially; The axial load force. This type of bearing equipment not only has long bearing life; high reliability; and has many advantages such as high precision and easy handling of rolled products; so it is the most widely used; it is mostly used in wire rod mills, sheet mills, foils. Support rolls for rolling mills, double-supported rolling mills, cold rolling mills and hot rolling mills.
(3). Four-row tapered roller bearings; tapered roller bearings can accept both radial forces and axial forces; no need to equip thrust bearings; therefore, the main engine appears to be more compact. The inner diameter of the tapered roller bearing and the roll neck are loosely matched; And easy to disassemble; but sometimes it will cause sliding creep due to loose cooperation; therefore, the inner diameter is often processed with a spiral oil groove. This type of equipment is still widely used; such as the operation of four-high hot rolling mill and cold rolling mill Rolls for rolls, blanking machines, steel beam mills, etc.

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