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Commonly used orbital bearing equipment
Source: Bearing network time: 2013-12-10
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The equipment type of the early rolling mill bearing 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 basically satisfactory for the production conditions at that time; the rolling speed can be 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 roll neck wear, large roll axial turbulence, etc. This kind of bearing is most common on rail machines.
Four rows of cylindrical roller bearings + thrust bearings; cylindrical roller bearing inner diameter and roller neck selection tight cooperation; accept 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.
Heavy-duty at low speed; with thrust roller bearing; with small axial clearance to accept thrust load. When rolling speed is high; with angular touch ball bearing; not only high speed limit; The gap can be strictly controlled to make the roll get tight axial guidance; and can accept the usual axial load force.
This type of bearing equipment not only has long bearing life; high reliability; it has many advantages such as high precision and easy handling of rolled products; so it is currently the most widely used; it is mostly used in wire rod mills, sheet mills, foil mills, double support rolls. Support rolls for rolling mill cold rolling mills and hot rolling mills.
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 it is very convenient 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.
The current use of this type of equipment is still relatively extensive; such as four-roll hot rolling mill and cold rolling mill work rolls, blanking machines, steel beam rolling mills and other occasions.
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