Four-row cylindrical roller bearing

Abstract

The utility model relates to a four-row cylindrical roller bearing, comprising: two double raceway outer rings, one straight raceway inner ring without the flange, two sets of combined side sealing mechanisms, four sets of retainer assemblies and four rows of cylindrical rollers evenly arranged in the four sets of retainer assemblies, the two sets of combined side sealing mechanisms are arranged at the inner ring outer diameter to the outer ring end surface position of the both ends of the bearing; a partition ring is arranged between the two double raceway outer rings, forming the flange of the two rows of cylindrical rollers in the middle of the bearing; the four rows of cylindrical rollers are arranged between the straight raceway of the inner ring and the single raceway of the two double raceway outer rings; the combined side sealing mechanism is arranged at the both ends of the whole four-row cylindrical roller bearing respectively, the combined side sealing mechanism forms the double sealing of the outer layer and the inner layer, the outer layer adopts the narrow-width retainer ring rubber hanging structure, the structure is simple, the occupied volume is small, and the sealing effect is achieved without affecting the original bearing structure and load.

Description

Technical Field

[0001] This utility model relates to the field of bearing technology, specifically to a four-row cylindrical roller bearing used in metallurgical hot rolling mills. Background Technology

[0002] The four-row cylindrical roller bearings used in metallurgical hot rolling mills operate in harsh environments. During the rolling process of square billets and slabs, a large amount of oxide scale and other impurities are generated under the strong scouring of water flow. Four-row cylindrical roller bearings are mostly used in the radial support position of the support rollers. Generally, the equipment is equipped with a sealing device to ensure the normal operation of the bearing. However, this sealing device has a complex structure and is difficult to maintain. Furthermore, damage to the sealing structure can directly lead to the entry of oxide scale and other impurities into the bearing, causing bearing damage. Utility Model Content

[0003] In view of the technical problems existing in the sealing of the four-row cylindrical roller bearings used in metallurgical hot rolling mills, the purpose of this utility model is to provide a four-row cylindrical roller bearing with an added sealing structure on the side. Based on the original sealing structure, the bearing is given double protection, which facilitates maintenance, prevents impurities from entering the bearing and affecting lubrication, and extends the service life of the bearing.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a four-row cylindrical roller bearing, comprising: two double-raceway outer rings, a straight raceway inner ring without flanges, two sets of combined side sealing mechanisms, four sets of cage assemblies, and four rows of cylindrical rollers evenly arranged in the four sets of cage assemblies. The two sets of combined side sealing mechanisms are located at the positions from the outer diameter of the inner ring to the end face of the outer ring at both ends of the bearing. Flanges are formed at the center of each of the two double-raceway outer rings for adjacent rows of cylindrical rollers. A spacer ring is provided in the middle between the two double-raceway outer rings to form flanges for the two rows of cylindrical rollers in the middle of the bearing. The four rows of cylindrical rollers are rolled between the straight raceway of the inner ring and the single raceways of each of the two double-raceway outer rings. Furthermore, each set of combined side sealing mechanisms includes: an outer seal and an inner metal retaining ring. The outer seal is composed of a narrow-width retaining ring and a sealing lip. An axial boss is formed at one end of the outer diameter of the narrow-width retaining ring, and the inner diameter of the narrow-width retaining ring is wrapped around the sealing lip. The metal retaining ring is located between the narrow-width retaining ring and the outer end face of the outer ring. Based on the above solution, the narrow-width retaining ring and the sealing lip constitute the adhesive retaining ring, and the two are bonded together; the narrow-width retaining ring is made of the same material as the inner metal retaining ring; Furthermore, the sealing lip has a double-lobed irregular shape, including a first long lip and a second short lip; the first long lip of the sealing lip makes a small interference contact with the inner ring of the bearing, which can effectively prevent external impurities from entering the bearing.

[0005] Furthermore, the small interference is designed with an interference amount of 0.8mm.

[0006] Furthermore, the inner metal retaining ring is designed with a stop that mates with the axial boss of the narrow-width retaining ring, and the narrow-width retaining ring and the metal retaining ring are mated together by the axial boss and the stop. Furthermore, the outer seal and inner metal retaining ring at each end of the bearing are both located on the outer diameter of the inner ring, and the outer side of the outer seal does not extend beyond the end face of the inner ring. Furthermore, the outer diameter of the narrow-width outer sealing ring is flush with the outer diameter of the inner metal sealing ring, and together they are flush with the outer diameter of the outer ring.

[0007] Furthermore, the inner side of the inner metal retaining ring contacts the end face of the outer ring and the end face of the cylindrical roller portion.

[0008] Furthermore, each cage assembly has the same structure and adopts a split design; each cage assembly includes two parts: a cage base and a cage cover, which are connected by thermal riveting through a column and a cylindrical roller.

[0009] The beneficial effects of this utility model are: The bearing is equipped with a combined side sealing mechanism at both ends of the entire four-row cylindrical roller bearing. The combined side sealing mechanism forms a double seal with an outer layer and an inner layer. The outer layer adopts a narrow-width retaining ring with rubber coating structure, which is simple in structure, occupies a small volume, and achieves a sealing effect without affecting the original bearing structure and load. Attached Figure Description

[0010] Figure 1 This is a structural diagram of the present invention.

[0011] Figure 2 This is an enlarged view of the side sealing mechanism of the bearing of this utility model.

[0012] In the figure, 1. Double raceway outer ring, 2. Straight raceway inner ring, 3. Cylindrical roller, 4. Spacer ring, 5. Narrow width retaining ring, 6. Sealing lip, 5.1. Axial boss, 7. Metal retaining ring, 6.1. First long lip, 6.2. Second short lip, 7.1. Stop, 2.1. Inner ring end face, 5.2. Narrow width retaining ring outer diameter, 7.2. Metal retaining ring outer diameter, 1.1. Outer ring outer diameter, 8. Cage seat, 9. Cage cover, 10. Support. Detailed Implementation

[0013] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0014] like Figure 1 , 2 The illustrated four-row cylindrical roller bearing includes: two double-raceway outer rings 1, one straight-raceway inner ring 2 without flanges, two sets of combined side seal mechanisms, four sets of cage assemblies, and four rows of cylindrical rollers 3 evenly arranged in the four sets of cage assemblies. The two sets of combined side seal mechanisms are located at the ends of the bearing from the outer diameter of the inner ring 2 to the end face of the outer ring 1. Flanges are formed at the center of each of the two double-raceway outer rings 1 for adjacent rows of cylindrical rollers 3. A spacer ring 4 is provided between the two double-raceway outer rings 1 to form flanges for the two rows of cylindrical rollers 3 in the middle of the bearing. The four rows of cylindrical rollers 3 are rolled between the straight raceway of the inner ring 2 and the single raceway of each of the two double-raceway outer rings 1. Furthermore, each set of combined side sealing mechanisms includes: an outer seal and an inner metal retaining ring 7. The outer seal is composed of a narrow-width retaining ring 5 and a sealing lip 6. An axial boss 5.1 is formed at one end of the outer diameter of the narrow-width retaining ring 5, and the inner diameter of the narrow-width retaining ring 5 is wrapped around the sealing lip 6. The metal retaining ring 7 is located between the narrow-width retaining ring 5 and the outer end face of the outer ring 1. Based on the above scheme, the narrow-width retaining ring 5 and the sealing lip 6 constitute an adhesive retaining ring, and the two are bonded together. Furthermore, the sealing lip 6 has a double-lobed irregular shape, including a first long lip 6.1 and a second short lip 6.1; the sealing lip 6 makes a small interference contact with the bearing inner ring 2 with its first long lip 6.1 with a small interference of 0.8mm, which can effectively prevent external impurities from entering the bearing.

[0015] Furthermore, the inner metal retaining ring 7 is designed with a stop 7.1 that mates with the axial boss 5.1 of the narrow-width retaining ring 5. The narrow-width retaining ring 5 and the metal retaining ring 7 are engaged together by the axial boss 5.1 and the stop 7.1. Furthermore, the outer seal and inner metal retaining ring at each end of the bearing are both located on the outer diameter of the inner ring 2, and the outer side of the outer seal does not exceed the inner ring end face 2.1. In the above scheme, the design principle of outer seal + inner seal is to design the width of the inner metal retaining ring accordingly without affecting the dimensions of the main load-bearing parts such as the length and diameter of the roller, the thickness of the inner and outer rings, and ensuring that it does not protrude from the bearing end face and does not interfere with the cage, and to limit the width of the narrow retaining ring of the outer seal.

[0016] Specifically, the width of the narrow-width retaining ring 5 is set to 0.01mm * the total width of the four rows of cylindrical bearings; the width of the metal retaining ring 7 is set to 0.02mm * the total width of the four rows of cylindrical bearings.

[0017] Furthermore, the outer diameter of the narrow-width outer sealing ring (5.2mm) is flush with the outer diameter of the inner metal sealing ring (7.2mm) and together they are flush with the outer diameter of the outer ring (1.1mm).

[0018] Furthermore, the inner metal retaining ring 7 contacts the end face of the outer ring 1 and part of the end face of the cylindrical roller 3, thereby forming a retaining edge of the cylindrical roller 3.

[0019] The seal structure of this application has an outer sealing ring 5 that acts as the skeleton of a conventional seal, making it difficult to fall off. A metal retaining ring is installed on its inner side to ensure that the seal does not protrude from the end face, thus achieving the sealing effect.

[0020] Each cage assembly has the same structure and adopts a split design. Each cage assembly includes two parts: a cage seat 8 and a cage cover 9. The cage seat 8 and the cage cover 9 are connected by thermal riveting through the cylindrical roller 3 via the support column 10.

[0021] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0025] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

Claims

1. A four-row cylindrical roller bearing, characterized in that, include: The bearing consists of two double-raceway outer rings, one straight-raceway inner ring without flanges, two sets of combined side seal mechanisms, four sets of cage assemblies, and four rows of cylindrical rollers evenly distributed within the four sets of cage assemblies. The two sets of combined side seal mechanisms are located at the ends of the bearing from the outer diameter of the inner ring to the end face of the outer ring. At the center of each of the two double-raceway outer rings, flanges are formed for two adjacent rows of cylindrical rollers. A spacer ring is provided between the two double-raceway outer rings to form flanges for two rows of cylindrical rollers in the middle of the bearing. The four rows of cylindrical rollers roll between the straight raceway of the inner ring and the single raceways of each of the two double-raceway outer rings.

2. A four-row cylindrical roller bearing according to claim 1, characterized in that: Each set of combined side sealing mechanisms includes: an outer seal and an inner metal retaining ring. The outer seal is composed of a narrow-width retaining ring and a sealing lip. An axial boss is formed at one end of the outer diameter of the narrow-width retaining ring, and the inner diameter of the narrow-width retaining ring is wrapped around the sealing lip. The metal retaining ring is located between the narrow-width retaining ring and the outer end face of the outer ring.

3. A four-row cylindrical roller bearing according to claim 2, characterized in that: The narrow-width retaining ring and the sealing lip together form an adhesive retaining ring, which is bonded together.

4. A four-row cylindrical roller bearing according to claim 2 or 3, characterized in that: The sealing lip has a double-lobed irregular shape, including a first long lip and a second short lip; the first long lip of the sealing lip makes a small interference contact with the inner ring of the bearing.

5. A four-row cylindrical roller bearing according to claim 4, characterized in that: The small interference fit is designed with an interference fit of 0.8mm.

6. A four-row cylindrical roller bearing according to claim 2, characterized in that: The inner metal retaining ring is designed with a stop that mates with the axial boss of the narrow-width retaining ring. The narrow-width retaining ring and the metal retaining ring are engaged together by the axial boss and the stop.

7. A four-row cylindrical roller bearing according to claim 2, characterized in that: The outer seal and inner metal retaining ring at each end of the bearing are both located on the outer diameter of the inner ring, and the outer side of the outer seal does not extend beyond the end face of the inner ring.

8. A four-row cylindrical roller bearing according to claim 2, characterized in that: The outer sealing narrow-width retaining ring has its outer diameter flush with the outer diameter of the inner metal retaining ring, and together they are flush with the outer diameter of the outer ring.

9. A four-row cylindrical roller bearing according to claim 1, characterized in that: Each cage assembly has the same structure and adopts a split design; each cage assembly consists of two parts: a cage base and a cage cover. The cage base and cage cover are connected by thermal riveting through a column and a cylindrical roller.

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