Space-ring-free four row tapered roller bearing

Abstract

The invention discloses a space-ring-free four row tapered roller bearing. The space-ring-free four row tapered roller bearing mainly comprises an outer ring, a second outer ring, an inner ring, a retainer, and tapered rollers. Two sides outside the bearing are provided with two single-roller-path outer rings, and a second double-roller-path outer ring which is positioned between the two single-roller-path outer rings; two double-roller-path inner rings are arranged on two sides in the bearing; tapered rollers are arranged between the inner ring, and the outer ring, and between the inner ring and the second outer ring; and each tapered roller is fixed by the retainer. The inner hole surface of the inner ring has a spiral line shape; and the length of the roller is 2.5 mm longer than that of the conventional design, and is increased by 5.1 percent in a proportion.

Description

technical field [0001] The invention relates to the technical field of bearings, in particular to a four-row tapered roller bearing without a spacer for a rolling mill. Background technique [0002] Four-row tapered roller bearings can bear axial loads in two directions at the same time when bearing large radial loads. Generally speaking, no additional thrust bearings are needed in the bearing configuration, and have been successfully used in rolling steel at low speeds. To the work rolls of medium-speed rolling mills and the rolls of billet mills. Due to the design of the four-row tapered roller bearing, this bearing must be mounted on the roll chock as a complete bearing, and in order to enable quick roll changes, this bearing must have a loose fit on the roll journal. The disadvantage of loose fit is that the inner ring creeps on its seat under the main load conditions, which usually causes wear of the seat with a lower hardness than the bearing ring, and when the roll n...

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