A six-row tapered roller bearing for rolling mill work rolls

Abstract

This utility model relates to the technical field of bearings for rolling mill rolls, specifically a six-row tapered roller bearing for rolling mill work rolls, comprising a first single-row outer ring, a second single-row outer ring, a double-row outer ring, a first double-row inner ring assembly, a second double-row inner ring assembly, a third double-row inner ring assembly, a first sealing assembly, and a second sealing assembly; there are two double-row outer rings arranged side by side; one end of one double-row outer ring contacts the first single-row outer ring, and one end of the other double-row outer ring contacts the second single-row outer ring. The rolling mill work roll has a length of 233mm and an outer diameter of 201mm. The contact angle of this six-row tapered roller bearing satisfies both radial and axial force requirements.

Description

Technical Field

[0001] This utility model relates to the technical field of bearings for rolling mill rolls, specifically a six-row tapered roller bearing for rolling mill work rolls. Background Technology

[0002] A rolling mill is a piece of equipment used in the metal rolling process. It mainly includes a drive system, a roll pressing system, and an operating system. Rolling mill bearings support the rolls and maintain their fixed position within the mill stand, making them crucial components for controlling the quality of rolled sheet metal. Rolling mill bearings operate under heavy loads, harsh environments, and significant stress variations. These factors affect the bearing's service life, which in turn directly impacts the rolling mill's efficiency.

[0003] The existing rolling mill work rolls use bearings consisting of four rows of tapered roller bearings plus two rows of tapered roller bearings, or four rows of cylindrical roller bearings plus two rows of ball bearings. However, this results in uneven load distribution and an inability to withstand heavy impacts. This technical problem cannot be solved without changing the main structure of the existing work rolls.

[0004] Tapered roller bearings used in rolling mill work rolls require precise axial preload (clearance) to ensure proper roller guidance, uniform load distribution, and optimal stiffness. Excessive preload leads to a surge in heat generation; insufficient preload results in roller skew, edge stress concentration, impact damage, and increased noise. Precisely measuring and adjusting bearing housings, spacers, and locknuts within the confined space of a rolling mill to achieve the ideal preload is technically demanding and time-consuming. As mentioned earlier, thermal expansion during operation alters the initial preload / clearance settings, increasing control complexity. Improper installation or adjustment is a common cause of premature bearing failure (such as flange damage, roller end breakage, and cage fracture). Utility Model Content

[0005] In view of the deficiencies of the prior art, this utility model provides a six-row tapered roller bearing for rolling mill work rolls, wherein the rolling mill work rolls are 233mm in length and 201mm in outer diameter. The contact angle of the six-row tapered roller bearing of this application can meet both radial force requirements and axial force requirements.

[0006] To achieve the above objectives, the present invention provides a six-row tapered roller bearing for rolling mill work rolls, comprising a first single-row outer ring, a second single-row outer ring, a double-row outer ring, a first double-row inner ring assembly, a second double-row inner ring assembly, a third double-row inner ring assembly, a first sealing assembly, and a second sealing assembly; the double-row outer rings are two in number; the two double-row outer rings are arranged side by side; one end of one double-row outer ring contacts the first single-row outer ring, and one end of the other double-row outer ring contacts the second single-row outer ring; one side of the first double-row inner ring assembly contacts the first single-row outer ring, and the other side contacts one side of one of the double-row outer rings; one side of the second double-row inner ring assembly contacts one of the double-row outer rings. The other side of the outer ring contacts the other side, and the other side contacts one side of another double-row outer ring; one side of the third double-row inner ring assembly contacts the other side of another double-row outer ring, and the other side contacts the second single-row outer ring; the first double-row inner ring assembly and the third double-row inner ring assembly have a symmetrical structure; the mill work roll operates by passing through the second double-row inner ring assembly, the first double-row inner ring assembly and the third double-row inner ring assembly; the first sealing assembly is disposed between the first double-row inner ring assembly and the first single-row outer ring; the second sealing assembly is disposed between the third double-row inner ring assembly and the second single-row outer ring, and the first sealing assembly and the second sealing assembly have a symmetrical structure.

[0007] Furthermore, the second double-row inner ring assembly, the first double-row inner ring assembly, and the third double-row inner ring assembly are all provided with cage assemblies.

[0008] Furthermore, the second double-row inner ring assembly is provided with a second double-race inner ring, and the cage assembly is provided in the raceway of the second double-race inner ring.

[0009] Furthermore, the first double-row inner ring assembly is provided with a first double-race inner ring, and a first flat platform is provided at the end of the first double-race inner ring near the mill work roll. The cage assembly is provided in the raceway of the first double-race inner ring. The third double-row inner ring assembly is provided with a third double-race inner ring, and a second flat platform is provided at the end of the third double-race inner ring near the mill work roll. The cage assembly is provided in the raceway of the third double-race inner ring.

[0010] Furthermore, the cage assembly is provided with tapered rollers, which are fixed by the cage.

[0011] Furthermore, the double-row outer ring is provided with oil holes, and the double-row outer ring forms a symmetrical structure with the axis of the oil holes as the axis of symmetry; the first single-row outer ring is provided with a first sealing groove; and the second single-row outer ring is provided with a second sealing groove.

[0012] Furthermore, the first sealing component is provided with a first sealing ring, one end of which is disposed in the first sealing groove and the other end of which is disposed in the first flat platform; the second sealing component is provided with a second sealing ring, one end of which is disposed in the second sealing groove and the other end of which is disposed in the second flat platform; both the first sealing component and the second sealing component are provided with spring rings, which are used to lock the first sealing ring and the second sealing ring.

[0013] Furthermore, an inner spacer is provided between one end of the second double-row inner ring assembly and the first double-row inner ring assembly; and an inner spacer is provided between the other end of the second double-row inner ring assembly and the third double-row inner ring assembly.

[0014] Furthermore, an outer spacer is provided between the first single-row outer ring and one of the double-row outer rings; an outer spacer is provided between one of the double-row outer rings and another double-row outer ring; and an outer spacer is provided between the second single-row outer ring and another double-row outer ring.

[0015] Furthermore, the mill work roll has a length of 233mm, an outer diameter of 201mm, and a single-sided wall thickness of 35mm.

[0016] The beneficial effects of this utility model are: (1) Load distribution: The huge radial load and axial load (especially the axial force generated by the rolling force) are evenly distributed on the six rows of rollers.

[0017] (2) Reduced single-row load: The actual load borne by each row of rollers is much lower than the load when using single-row or double-row bearings, which significantly reduces the stress on the contact surface between the rollers and the raceway.

[0018] (3) Coping with heavy load impact: It is particularly suitable for the ultra-high rolling force and steel biting impact faced by modern high-speed and high-output rolling mills (such as hot strip mills and medium and heavy plate mills). Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ; Figure 3 for Figure 2 Enlarged view of a portion at point A; Figure 4 for Figure 2 A magnified view of section B; Figure 5 This is a schematic diagram of the structure of the rolling mill work roll of this utility model; In the diagram: 100, first single-row outer ring; 110, first sealing groove. 200, Second single-row outer ring; 210, Second sealing groove; 300, double row outer ring; 310, oil hole. 400, First double-row inner ring assembly; 410, First double-race inner ring; 411, First flat platform. 500, Third double-row inner ring assembly; 510, Third double-race inner ring; 511, Second flat platform. 600, Second double-row inner ring assembly; 610, Second double-raceway inner ring; 700, cage assembly; 710, tapered rollers; 800. First sealing assembly; 810. First sealing ring; 900. Second sealing assembly; 910. Second sealing ring; 1000, spring coil, 1100, Inner partition ring, 1200, outer spacer ring, 1300. Rolling mill work rolls L is the length of the mill work roll, and φ is the outer diameter of the mill work roll. Detailed Implementation

[0020] 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.

[0021] like Figure 1As shown, one embodiment of this utility model discloses a six-row tapered roller bearing for rolling mill work rolls, comprising a first single-row outer ring 100, a second single-row outer ring 200, a double-row outer ring 300, a first double-row inner ring assembly 400, a second double-row inner ring assembly, a third double-row inner ring assembly 500, a first sealing assembly 800, and a second sealing assembly 900; there are two double-row outer rings 300 arranged side by side; one end of one double-row outer ring 300 contacts the first single-row outer ring 100, and one end of the other double-row outer ring 300 contacts the second single-row outer ring 200; one side of the first double-row inner ring assembly 400 contacts the first single-row outer ring 100, and the other side contacts one side of one double-row outer ring 300; one side of the second double-row inner ring assembly contacts one double-row outer ring 300. One side of the third double-row inner ring assembly 500 is in contact with the other side of the second double-row outer ring 300, and the other side is in contact with the second single-row outer ring 200. The first double-row inner ring assembly 400 and the third double-row inner ring assembly 500 have a symmetrical structure. The mill work roll 1300 passes through the second double-row inner ring assembly, the first double-row inner ring assembly 400 and the third double-row inner ring assembly 500 to operate. The first sealing assembly 800 is disposed between the first double-row inner ring assembly 400 and the first single-row outer ring 100. The second sealing assembly 900 is disposed between the third double-row inner ring assembly 500 and the second single-row outer ring 200. The first sealing assembly 800 and the second sealing assembly 900 have a symmetrical structure.

[0022] It should be noted that within the limited space of the roll journal, the six-row design achieves an extremely high degree of load-bearing capacity integration, resolving the contradiction between large rolling force and small installation space; compared to using multiple single-row bearing combinations to achieve the same load-bearing capacity, the six-row unit typically has a more compact axial dimension.

[0023] In one embodiment, the second double-row inner ring assembly 600, the first double-row inner ring assembly 400, and the third double-row inner ring assembly 500 are all provided with cage assemblies.

[0024] In one embodiment, the second double-row inner ring assembly 600 is provided with a second double-raceway inner ring 610, and a cage assembly 700 is provided in the raceway of the second double-raceway inner ring 610.

[0025] In one embodiment, the first double-row inner ring assembly 400 is provided with a first double-race inner ring 410, and a first flat platform 411 is provided at one end of the first double-race inner ring 410 near the mill work roll 1300. A cage assembly 700 is provided in the raceway of the first double-race inner ring 410. The third double-row inner ring assembly 500 is provided with a third double-race inner ring 510, and a second flat platform 511 is provided at one end of the third double-race inner ring 510 near the mill work roll 1300. A cage assembly 700 is provided in the raceway of the third double-race inner ring 510.

[0026] Furthermore, the cage assembly 700 is provided with tapered rollers 710, which are fixed by the cage.

[0027] In one embodiment, the double-row outer ring 300 is provided with an oil hole 310, and the double-row outer ring 300 forms a symmetrical structure with the axis of the oil hole 310 as the axis of symmetry; the first single-row outer ring 100 is provided with a first sealing groove 110; and the second single-row outer ring 200 is provided with a second sealing groove 210.

[0028] See appendix Figure 3-4 In one embodiment, the first sealing component 800 is provided with a first sealing ring 810, one end of which is disposed in the first sealing groove 110 and the other end of which is disposed in the first flat platform 411; the second sealing component 900 is provided with a second sealing ring 910, one end of which is disposed in the second sealing groove 210 and the other end of which is disposed in the second flat platform 511; both the first sealing component 800 and the second sealing component 900 are provided with a spring ring 1000, which is used to lock the first sealing ring 810 and the second sealing ring 910.

[0029] In one embodiment, a bushing (the bushing is a prior art, and the bushing and the work roll are integrated) is provided on the outer diameter of the mill work roll 1300. The bushing can be assembled by heat fitting, so that the mill work roll 1300 forms a smooth shaft, which facilitates the assembly of the six rows of tapered roller 710 bearings.

[0030] In the aforementioned six-row tapered roller 710 bearings for the rolling mill work rolls, see Appendix Figure 2 Preferably, an inner spacer 1100 is provided between one end of the second double-row inner ring assembly 600 and the first double-row inner ring assembly 400; and an inner spacer 1100 is provided between the other end of the second double-row inner ring assembly 600 and the third double-row inner ring assembly 500.

[0031] Furthermore, an outer partition ring 1200 is provided between the first single-row outer ring 100 and a double-row outer ring 300; an outer partition ring 1200 is provided between one double-row outer ring 300 and another double-row outer ring 300; and an outer partition ring 1200 is provided between the second single-row outer ring 200 and another double-row outer ring 300.

[0032] In one embodiment, the mill work roll 1300 has a length of 233 mm, an outer diameter of 201 mm, and a single-sided wall thickness of 35 mm.

[0033] It should be noted that, although the overall precision requirements for the aforementioned six-row tapered roller bearing for rolling mill work rolls are still very high, the six-row bearing units are typically pre-loaded and matched precisely at the factory (e.g., through precision grinding of the spacers). This greatly simplifies the complexity of on-site installation and adjustment, reduces the risk of human error, and is designed as a compact unit with an integral bearing housing (or sleeve), facilitating overall hoisting, replacement, and maintenance, and shortening downtime.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] In this invention, 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 through an intermediate medium. Furthermore, "above," "over," and "on top" of 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. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or there may be an intermediate element present. 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 intermediate element present. The terms "vertical," "horizontal," "above," "below," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

Claims

1. A six-row tapered roller bearing for rolling mill work rolls, characterized in that: include First single-column outer ring; Second single-row outer ring; There are two double-row outer rings; the two double-row outer rings are arranged side by side; one end of one double-row outer ring is in contact with the first single-row outer ring, and one end of the other double-row outer ring is in contact with the second single-row outer ring; The first double-row inner ring assembly has one side in contact with the first single-row outer ring and the other side in contact with one side of the double-row outer ring; The second double-row inner ring assembly has one side in contact with the other side of one of the double-row outer rings, and the other side in contact with one side of the other double-row outer ring; The third double-row inner ring assembly has one side in contact with the other side of the other double-row outer ring, and the other side in contact with the second single-row outer ring; The first double-row inner ring assembly and the third double-row inner ring assembly have a symmetrical structure; the mill work rolls operate by passing through the second double-row inner ring assembly, the first double-row inner ring assembly, and the third double-row inner ring assembly; A first sealing assembly is disposed between the first double-row inner ring assembly and the first single-row outer ring; The second sealing assembly is disposed between the third double-row inner ring assembly and the second single-row outer ring assembly, and the first sealing assembly and the second sealing assembly have a symmetrical structure.

2. A six-row tapered roller bearing for rolling mill work rolls according to claim 1, characterized in that: The second double-row inner ring assembly, the first double-row inner ring assembly, and the third double-row inner ring assembly are all provided with a cage assembly.

3. A six-row tapered roller bearing for rolling mill work rolls according to claim 2, characterized in that: The second double-row inner ring assembly is provided with a second double-race inner ring, and the cage assembly is provided in the raceway of the second double-race inner ring.

4. A six-row tapered roller bearing for rolling mill work rolls according to claim 2, characterized in that: The first double-row inner ring assembly is provided with a first double-race inner ring, and a first flat platform is provided at the end of the first double-race inner ring near the mill work roll. The cage assembly is provided in the raceway of the first double-race inner ring. The third double-row inner ring assembly is provided with a third double-race inner ring, and a second flat platform is provided at the end of the third double-race inner ring near the mill work roll. The cage assembly is provided in the raceway of the third double-race inner ring.

5. A six-row tapered roller bearing for rolling mill work rolls according to claim 2, characterized in that: The cage assembly is provided with tapered rollers, which are fixed by the cage.

6. A six-row tapered roller bearing for rolling mill work rolls according to claim 4, characterized in that: The double-row outer ring is provided with oil holes, and the double-row outer ring forms a symmetrical structure with the axis of the oil holes as the axis of symmetry; the first single-row outer ring is provided with a first sealing groove; the second single-row outer ring is provided with a second sealing groove.

7. A six-row tapered roller bearing for rolling mill work rolls according to claim 6, characterized in that: The first sealing component is provided with a first sealing ring, one end of which is disposed in the first sealing groove and the other end of which is disposed in the first flat platform; the second sealing component is provided with a second sealing ring, one end of which is disposed in the second sealing groove and the other end of which is disposed in the second flat platform; both the first sealing component and the second sealing component are provided with spring rings, which are used to lock the first sealing ring and the second sealing ring.

8. A six-row tapered roller bearing for rolling mill work rolls according to claim 1, characterized in that: An inner spacer is provided between one end of the second double-row inner ring assembly and the first double-row inner ring assembly; and an inner spacer is provided between the other end of the second double-row inner ring assembly and the third double-row inner ring assembly.

9. A six-row tapered roller bearing for rolling mill work rolls according to claim 1 or 8, characterized in that: An outer spacer is provided between the first single-row outer ring and one of the double-row outer rings; an outer spacer is provided between one of the double-row outer rings and another double-row outer ring; and an outer spacer is provided between the second single-row outer ring and another double-row outer ring.

10. A six-row tapered roller bearing for rolling mill work rolls according to claim 1, characterized in that: The mill work roll has a length of 233mm, an outer diameter of 201mm, and a single-sided wall thickness of 35mm.

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