Special bearing for speed reducer of vertical cement mill

Abstract

A special bearing for a speed reducer of a vertical cement mill is formed by assembling an outer ring, an inner ring, a first retainer, a second retainer, a first row of rolling bodies and a second row of rolling bodies and is a back-to-back double-row tapered roller bearing. The bearing is characterized in that (1) the inner ring is composed of a first half inner ring and a second half inner ring; an inner spacer ring is arranged between the first half inner ring and the second half inner ring; each rolling body is a tapered roller; (2) the guide clearance between the large flange and the small flange of the first half inner ring is consistent with the inner diameter guide clearance of the first retainer; the large flange and the small flange of the first half inner ring are used for guiding the first retainer; the guide clearance between the large flange and the small flange of the second half inner ring is consistent with the inside diameter guide clearance of the second retainer; the large flange and the small flange of the second half inner ring are used for guiding the second retainer; a plurality of first lubrication grooves are equidistantly formed in the large end of the first retainer; a plurality of second lubrication grooves are equidistantly formed in the small end of the first retainer. The bearing has the advantages that the stationarity at high rotating speed is high, the lubricity is high, and the service life is long.

Description

technical field [0001] The invention relates to a bearing on the primary shaft of the high-speed input end of a super-large cement vertical mill reducer. The imported products of a world-renowned bearing manufacturing company are all used, and the special bearings such as HM265049 / HM265010CD / P59 developed by the company replace the imported ones. It fills the gap in the bearing industry. Background technique [0002] This bearing is used on the primary shaft of the high-speed input end of a 6.4-meter extra-large cement vertical mill reducer. It was originally imported from a world-renowned bearing manufacturing company (only produced by this company). The bearing size of HM265049 / HM265010CD / P59 is φ368.249X, φ523.875X214.312. It belongs to the British back-to-back double row tapered roller bearing. The rated dynamic load is Cr=2530KN, the rated static load is Cor=5430KN, and the weight is 128Kg. [0003] Since a set of HM265049 / HM265010CD / P59 bearings and H859049 / H859010 / P5...

AI Technical Summary

Problems solved by technology

[0006] ②The vibration of the reducer is large when it is working

[0008] ④ The clearance of the two sets of bearings should be consistent. If the clearance and inner diameter of the two sets of bearings differ greatly from each other, it is easy to cause the clearance difference between the bearings after installation to be too large and the force to be uneven, so that one of the products will fail prematurely.

[0009] ⑤ After installation, the bearing clearance should be as small as possible, otherwise it will easily lead to excessive vibration of the bearing at high speed, and the reduction of speed capability

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