Special deep groove ball bearing and grouping method thereof

Abstract

The invention discloses a special deep groove ball bearing and a grouping method thereof. The special deep groove ball bearing comprises an outer ring, an inner ring, a steel ball and a holder. The steel ball is connected between a groove of the outer ring and a groove of the inner ring in a clamped manner. The holder comprises a first holder body and a second holder body. The first holder body and the second holder body are arranged on the steel ball in a sleeving manner and connected through a rivet. The special deep groove ball bearing is characterized in that the clearance of the outer diameter of the holder and the inner diameter of the outer ring is smaller than that of the inner diameter of the holder and the outer diameter of the inner ring. The grouping method comprises the following steps that the outer diameter dimension D and the inner diameter dimension d of the special deep groove ball bearing are measured; the standard tolerances of the outer diameter dimension D are evenly divided into n groups; the standard tolerances of the inner diameter dimension d are evenly divided into m groups; and the n groups of the outer diameter dimension D and the m groups of the inner diameter dimension d are subjected to permutation and combination, the total grouping number N of the special deep groove ball bearing is obtained, and N=n*m. According to the special deep groove ball bearing and the grouping method, the mounting steps of the bearing can be simplified, and the service life of the bearing can be prolonged.

Description

technical field [0001] The invention relates to the technical field of bearings, in particular to a special deep groove ball bearing and a grouping method thereof. Background technique [0002] Bearings are widely used in the field of mechanical equipment, and general rotating shafts need to be equipped with bearings to provide rotational freedom. In order to improve the versatility and quality of bearings, my country has stipulated recommended standards for bearings. [0003] Nuclear equipment uses deep groove ball bearings, usually using standard bearings whose tolerances meet those specified in GB / T307.1, but nuclear equipment requires high installation accuracy for bearings, shafts and boxes. Since the bearings adopt standard tolerance grades and radial clearances, the tolerances and radial clearances of the matching dimensions of the product (especially the inner and outer diameters of the bearings) are relatively large, and the bearings, shafts and boxes usually use i...

AI Technical Summary

Problems solved by technology

[0003] Nuclear equipment uses deep groove ball bearings, usually using standard bearings with tolerances in line with GB / T307.1, but nuclear equipment requires high installation accuracy for bearings, shafts and boxes

Since the bearings adopt standard tolerance grades and radial clearances, the tolerances and radial clearances of the matching dimensions of the product (especially the inner and outer diameters of the bearings) are relatively large, and the bearings, shafts and boxes usually use interference fits , resulting in bearings with too much interference, laborious installation, or too small interference, bearings are easy to dislocate and loosen

And after the shaft is installed, it is necessary to install the shaft and the bearing on the box together. If the interference between the bearing and the box does not meet the regulations, the bearing needs to be replaced, which not only brings more trouble to the assembly of the host unit. It is a big trouble, and it is easy to cause a large relative displacement between the shaft and the box of the nuclear equipment, so that the shaft of the nuclear equipment is prone to large vibrations during operation, resulting in shortened bearing life. The maintenance cycle will also be shortened

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