Special external guidance double row cylindrical roller bearing for vertical mill

Abstract

The invention belongs to the technical field of rolling bearings, and particularly relates to a special external guidance double row cylindrical roller bearing for a vertical mill. The bearing comprises an outer ring, an inner ring, a rolling body and a holder, wherein a boss is arranged on the surface of the external diameter of the holder in the peripheral direction, circular arc grooves are machined in the external diameter of the boss, the end face of a flange of the holder is machined by an angle of 17 degrees, and guidance gaps are reserved at the external diameter and internal diameterpositions of the outer ring and the external diameter position of the holder. According to the bearing, it is guaranteed that after the outer ring rotates, the holder is driven to rotate and pushes the rolling body to rotate, and the rotation flexibility is good; the circular arc grooves are machined in the external diameter of the boss, so that lubrication can be increased; and the 17-degree angle machined at the end face of the flange can ensure lubrication of the end faces of the flange and the rolling body and unblocking of an oil channel.

Description

technical field [0001] The invention belongs to the technical field of rolling bearings, in particular to a special external guide double-row cylindrical roller bearing for vertical mills. Background technique [0002] With the substantial improvement of the research and development technology of milling machinery, the vertical mill technology of foreign mill manufacturers has become more mature, and the technical advantages of vertical mill products have become increasingly prominent. In this situation, domestic mill manufacturers have learned from foreign successful experience and carried out major technological reforms. The actual principle of the vertical mill is that the motor drives the millstone to rotate, and the material falls from the discharge port to the center of the millstone. It moves down to the edge of the grinding table and is crushed by the grinding roller. The grinding roller starts to rotate under the action of the grinding pressure. The bearing is the k...

AI Technical Summary

Problems solved by technology

In this situation, domestic mill manufacturers have learned from foreign successful experience and carried out major technological reforms. The actual principle of the vertical mill is that the motor drives the millstone to rotate, and the material falls from the discharge port to the center of the millstone. It moves down to the edge of the grinding table and is crushed by the grinding roller. The grinding roller starts to rotate under the action of the grinding pressure. The bearing is the key part of the vertical grinding roller, and the roller surface cooperates with the outer ring of the bearing, so the grinding roller bearing is actually The outer ring rotates, and the traditional vertical mill roller bearing is guided by rolling elements. At the same time, the weight of the cage of the general vertical mill is relatively large. The rolling elements push the cage to rotate, and the rotation flexibility is poor. Therefore, the existing bearing structure needs to be improved.

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