Three-row self-aligning roller bearing

Abstract

The utility model belongs to the technical field of bearings, and discloses a three-row self-aligning roller bearing which comprises an outer ring and an inner ring, the inner ring is arranged on the inner side of the outer ring, three rows of rollers are arranged between the outer ring and the inner ring at intervals in the circumferential direction, each roller is of a hollow structure, check rings are arranged on the two sides of each row of rollers, and the check rings are arranged on the inner side of the outer ring. A supporting column is arranged at the hollow position of each roller in a penetrating and inserting mode. According to the self-aligning roller bearing, two rows of rollers are changed into three rows of rollers, the rollers are changed into hollow structures from solid structures, each row of rollers are connected into a whole through the check rings and the supporting columns, and the bearing capacity, rigidity and stability of the roller bearing can be improved. The middle column vertically bears the maximum radial load, the overall structure is more stable, and higher load can be borne; the two rows of rollers on the two sides can bear certain bidirectional axial load besides bearing very high radial load, the axial force is shared, the load and abrasion of the bearing are reduced, the service life of the bearing is prolonged, and the reliability of the bearing is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, and more specifically to a three-row spherical roller bearing. Background Art

[0002] Spherical roller bearings are bearings with drum-shaped rollers assembled between an inner ring with two raceways and an outer ring with a spherical raceway. They are specially designed to withstand large radial and axial loads.

[0003] The current spherical roller bearings are mostly arranged in two rows of rollers and two rows of pockets in a staggered manner, and the cage is guided by the outer diameter of the inner ring. Since the guide surface gap is very small, it is difficult to lubricate the guide surface during grease lubrication, resulting in increased dry friction between the guide surface, the inner ring and the cage, and increased bearing temperature, causing the bearing to fatigue and fail prematurely;

[0004] The cage pockets are arranged in a staggered manner. After the rollers are installed, the rollers on both sides do not run synchronously, interfering with each other, making loud noises, and the cage beams often break, causing the bearings to be scrapped. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a three-row spherical roller bearing.

[0006] In order to solve the above problems, the utility model adopts the following technical solutions:

[0007] A three-row spherical roller bearing comprises an outer ring and an inner ring, wherein the inner ring is arranged on the inner side of the outer ring, and three rows of rollers are arranged circumferentially at intervals between the outer ring and the inner ring, each of the rollers is a hollow structure, and retaining rings are arranged on both sides of each row of rollers, and the retaining rings are sleeved on the inner ring, and pillars are interspersed in the hollow part of each roller, and the two ends of the pillars are respectively fixedly connected to two retaining rings.

[0008] As a further description of the above technical solution: a guide ring is arranged between two adjacent rows of rollers, and the guide ring is sleeved on the inner ring.

[0009] As a further description of the above technical solution: the support column is adapted to the hollow part of the roller.

[0010] Compared with the prior art, the advantages of the present invention are:

[0011] 1. The spherical roller bearing of this scheme is changed from two rows of rollers to three rows of rollers, and the rollers are changed from solid to hollow. Each row of rollers is connected as a whole by retaining rings and pillars, which can improve the bearing capacity, rigidity and stability of the roller bearing. The middle row vertically bears the largest radial load, and the overall structure is more stable and can withstand higher loads; in addition to bearing very high radial loads, the two rows of rollers on both sides can also withstand certain bidirectional axial loads, share the axial force, reduce the load and wear of the bearing, and improve the life and reliability of the bearing.

[0012] Second, this solution uses window-through pillars instead of cages, which can avoid the problem of premature bearing damage caused by frictional heat generated by the small gap between the outer diameter of the inner ring and the inner diameter of the cage, and more effectively utilize the internal space of the bearing, increase the load-bearing capacity, make the load-bearing capacity more uniform, and save the cost of producing brass cages.

[0013] 2. When grease lubrication is used in this solution, the lubrication effect will be improved, thereby significantly reducing the bearing temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is an enlarged view of the connection between the support and the roller of the utility model.

[0016] Description of the numbers in the figure:

[0017] 1. Outer ring; 2. Inner ring; 3. Roller; 4. Retaining ring; 5. Pillar; 6. Guide ring. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-2 A three-row spherical roller bearing includes an outer ring 1 and an inner ring 2. The inner ring 2 is arranged on the inner side of the outer ring 1. Three rows of rollers 3 are arranged circumferentially at intervals between the outer ring 1 and the inner ring 2. Each roller 3 is a hollow structure. Retaining rings 4 are arranged on both sides of each row of rollers 3. The retaining rings 4 are sleeved on the inner ring 2. The hollow part of each roller 3 is interspersed with a supporting column 5 adapted thereto. The two ends of the supporting column 5 are fixedly connected to the two retaining rings 4 respectively. A guide ring 6 is arranged between two adjacent rows of rollers 3. The guide ring 6 is sleeved on the inner ring 2.

[0020] In this solution, the spherical roller bearing is designed to have three rows of rollers 3, the rollers 3 are changed from solid to hollow, and the retaining frame is replaced by a structure composed of a retaining ring 4 and a support 5. Each row of rollers 3 is connected as a whole through the retaining ring 4 and the support 5. On the one hand, the bearing capacity, rigidity and stability of the roller bearing are improved, and on the other hand, the premature damage of the bearing caused by frictional heat due to the small gap between the outer diameter of the inner ring 2 and the inner diameter of the retaining frame can be avoided, and the cost of producing brass retaining frames can be saved.

[0021] The three rows of rollers 3 run synchronously, with the middle row vertically bearing the largest radial load. The two rows of rollers 3 on both sides can withstand a certain bidirectional axial load in addition to a very high radial load, share the axial force, reduce the load and wear of the bearing, and improve the life and reliability of the bearing.

[0022] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A three-row spherical roller bearing, comprising an outer ring (1) and an inner ring (2), wherein the inner ring (2) is arranged on the inner side of the outer ring (1), characterized in that: Three rows of rollers (3) are arranged at intervals along the circumferential direction between the outer ring (1) and the inner ring (2); each of the rollers (3) is a hollow structure; retaining rings (4) are arranged on both sides of each row of rollers (3); and the retaining rings (4) are sleeved on the inner ring (2); A support column (5) is inserted into the hollow part of each roller (3), and two ends of the support column (5) are respectively fixedly connected to two retaining rings (4).

2. A three-row spherical roller bearing according to claim 1, characterized in that: A guide ring (6) is provided between two adjacent rows of rollers (3), and the guide ring (6) is sleeved on the inner ring (2).

3. A three-row spherical roller bearing according to claim 1, characterized in that: The support column (5) is adapted to the hollow portion of the roller (3).

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