A Method for Adjusting Clearance of Double Row Tapered Roller Bearing in Universal Rolling Mill

Abstract

The invention provides a universal mill double-row tapered roller bearing play adjusting method. A heated vertical roller is lifted onto an outer ring of a lower-row bearing; then, an outer ring of an upper-row bearing is mounted on the vertical roller; after the temperature of the vertical roller is lowered, an oil seal is mounted in the vertical roller, an inner ring of the lower-row bearing and an inner ring of the upper-row bearing are mounted on the vertical roller in sequence, and the vertical roller uniformly rotates; an original radial gap value x of the bearings and an original gap value y between the inner ring of the lower-row bearing and the inner ring of the upper-row bearing are respectively measured by a feeler gauge, a thickness h of adjusting washers of the outer ring of the lower-row bearing and the outer ring of the upper-row bearing is calculated according to a formula, the inner ring of the lower-row bearing and the inner ring of the upper-row bearing are lifted out from the vertical roller, and after the machined washers are mounted, the inner ring of the upper-row bearing is mounted in the vertical roller again. The method can effectively prolong the service life of the bearings, reduces the machine stop accidents, decreases the spare part consumption and the production cost, relieves the labor intensity of workers, and greatly improves the mill operability while improving the labor productivity.

Description

technical field [0001] The invention belongs to the field of mechanical equipment, and in particular relates to a method for adjusting the clearance of a double-row tapered roller bearing of a universal rolling mill. Background technique [0002] The vertical roll bearing of the universal rolling mill adopts double-row tapered roller bearings, double outer ring and double inner ring structure, and the assembly method is back-to-back combination. At present, the assembly of double-row tapered roller bearings adopts the clearance assembled by the manufacturer, that is, a gasket with a thickness of 0.2mm is placed between the inner rings of the two sets of bearings, and no secondary clearance is set before assembly. Certainly. However, in actual work, it is found that since the outer diameter of each bearing is not exactly the same as the inner diameter of the roller ring of the vertical roller, they have different effects on the working clearance of the bearing after thermal ...

AI Technical Summary

Problems solved by technology

However, in actual work, it is found that since the outer diameter of each bearing is not exactly the same as the inner diameter of the roller ring of the vertical roller, they have different effects on the working clearance of the bearing after thermal assembly, and the error in assembly, In the end, the working clearance of each vertical roller is different, so that it is impossible to know the actual working clearance of each bearing after assembly. Not only can the correct judgment of the cause of failure be unable to be made after the bearing fails, it will lead to downtime accidents and increase the number of spare parts Consumption and maintenance workload; and cause uneven bearing wear, which seriously affects the service life of double row tapered roller bearings

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