Sealed self-aligning roller bearing for high-speed rail and repair method thereof

Abstract

The invention relates to a sealed self-aligning roller bearing for a high-speed rail and a repair method thereof. The bearing comprises an inner ring, an outer ring, a roller, a holder and a sealed housing, wherein the holder is formed by integral injection moulding of a glass fiber enhanced nylon 66 material and is located on a middle line between the inner and outer rings; the holder is integrally cone-shaped, and the axial section of the single side wall of the holder is / -shaped; roller installation parts are uniformly distributed in the periphery of the holder, and the side face of each roller installation part is a spherical face; the included angle beta between the connecting line of the widest part of each roller installation part and the center of the bearing and the radial section of the bearing is equal to a nominal contact angle. The invention further discloses the repair method of the bearing. According to the structural design, the repaired bearing can be continuously used, so that the maintenance cost of the high-speed rail is effectively lowered, and the service life of the bearing is remarkably prolonged.

Description

technical field [0001] The invention relates to the technical field of bearings, and mainly relates to a structure type of a sealed spherical roller bearing for high-speed rail, and also relates to a method for repairing this type of bearing. Background technique [0002] At present, the self-aligning roller bearings used on high-speed rail are SRB130×220 used in single sets or in pairs, and its internal structure is as follows: Figure 1 to Figure 4 Shown: It is composed of outer ring 1, inner ring 2, roller 3, stamping cage 4, and intermediate retaining ring 5. The size of this type of bearing is specially designed for high-speed rail. Due to structural design reasons, the spherical roller bearing of this design has disadvantages such as easy contamination of grease, high noise during operation, high energy consumption, low load-carrying capacity, and poor safety performance. Due to the particularity of high-speed rail bearing application occasions, for safety consideratio...

AI Technical Summary

Problems solved by technology

The size of this type of bearing is specially designed for high-speed rail. Due to structural design reasons, the self-aligning roller bearing of this design has disadvantages such as easy pollution of grease, high noise during operation, high energy consumption, low load-carrying capacity, and poor safety performance.

Due to the particularity of high-speed rail bearing applications, for safety considerations, new bearings must be replaced when there is some minor wear and tear during high-speed rail maintenance. The actual service life of the replaced bearings is far from reaching its design life, resulting in high maintenance costs.

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