Six-row tapered roller bearing for working roll of rolling mill

Abstract

The invention relates to the technical field of bearings for rolling mill rollers, in particular to a six-row tapered roller bearing for rolling mill working rollers, which comprises 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 number of the double-row outer rings is two; the two double-row outer rings are arranged in parallel; 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 length of a working roll of a rolling mill is 233 mm, the outer diameter of the working roll is 201 mm, and the contact angle of the six-row tapered roller bearing can meet the radial force requirement and the axial force requirement.

Description

Technical Field

[0001] The present invention relates to the technical field of bearings for rolling mill rolls, and particularly to a six-row tapered roller bearing for a working roll of a rolling mill. Background Art

[0002] A rolling mill is a device for realizing the metal rolling process, mainly including a drive system, a roll pressing system, an operating system, etc. Rolling mill bearings are used to support the rolls and maintain the fixed position of the rolls in the rolling mill frame, and are important components for controlling the quality of rolled sheets. Rolling mill bearings have heavy working loads, harsh working environments, and large force variations, which affect the service life of the bearings, and the service life of the bearings directly affects the working efficiency of the rolling mill.

[0003] The original bearings for rolling mill working rolls required four-row tapered roller bearings plus two-row tapered roller bearings, or four-row cylindrical roller bearings plus two-row ball bearings in combination, but this would result in uneven load distribution and inability to cope with heavy load impacts. It was impossible to solve this technical problem without changing the main structure of the original working roll.

[0004] The tapered roller bearings for rolling mill working rolls require precise axial preload (clearance) to ensure correct roller guidance, uniform load distribution, and optimal stiffness. Excessive preload leads to a sharp increase in heat; too little preload results in roller skewing, edge stress concentration, impact damage, and increased noise. Precise measurement and adjustment of the bearing housing, spacer, lock nut, etc. in the narrow space of the rolling mill to achieve an ideal preload state have high technical requirements and are time-consuming and laborious. As mentioned above, thermal expansion during operation changes the initially set preload / clearance, increasing the complexity of control. Improper installation or adjustment is a common cause of early bearing failure (such as rib damage, roller end fragmentation, cage fracture). Summary of the Invention

[0005] In view of the defects of the prior art, the present invention provides a six-row tapered roller bearing for a rolling mill working roll. The working roll of the rolling mill has a length of 233 mm and an outer diameter of 201 mm. The contact angle of the six-row tapered roller bearing of the present application can meet both the radial force requirements and the axial force requirements.

[0006] To achieve the above object, the technical solution provided by the present invention is a six-row tapered roller bearing for a rolling mill work roll, which includes 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; 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; one side of the first double-row inner ring assembly is in contact with the first single-row outer ring, and the other side is in contact with one side of one double-row outer ring; one side of the second double-row inner ring assembly is in contact with the other side of one double-row outer ring, and the other side is in contact with one side of the other double-row outer ring; one side of the third double-row inner ring assembly is in contact with the other side of the other double-row outer ring, and the other side is in contact with the second single-row outer ring; the first double-row inner ring assembly and the third double-row inner ring assembly are of a symmetric structure; the rolling mill work roll passes through the second double-row inner ring assembly, the first double-row inner ring assembly and the third double-row inner ring assembly for operation; the first sealing assembly is arranged between the first double-row inner ring assembly and the first single-row outer ring; the second sealing assembly is arranged 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 are of a symmetric structure.

[0007] Further, 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 groups.

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

[0009] Further, the first double-row inner ring assembly is provided with a first double-raceway inner ring, a first flat platform is arranged at one end of the first double-raceway inner ring close to the rolling mill work roll, and the cage group is arranged in the raceway of the first double-raceway inner ring; the third double-row inner ring assembly is provided with a third double-raceway inner ring, a second flat platform is arranged at one end of the third double-raceway inner ring close to the rolling mill work roll, and the cage group is arranged in the raceway of the third double-raceway inner ring.

[0010] Further, the cage group is provided with tapered rollers, and the tapered rollers are fixed by a cage.

[0011] Further, the double-row outer ring is provided with an oil hole, and the double-row outer ring forms a symmetric structure with the axis of the oil hole 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.

[0012] Further, the first sealing assembly is provided with a first sealing ring, one end of the first sealing ring is arranged in the first sealing groove, and the other end is arranged on the first flat table; the second sealing assembly is provided with a second sealing ring, one end of the second sealing ring is arranged in the second sealing groove, and the other end is arranged on the second flat table; both the first sealing assembly and the second sealing assembly are provided with spring rings, and the spring rings are used to lock the first sealing ring and the second sealing ring.

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

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

[0015] Further, the working roll of the rolling mill has a length of 233 mm, an outer diameter of 201 mm, and a unilateral wall thickness of 35 mm.

[0016] Advantages of the present invention: (1) Load sharing: The huge radial load and axial load (especially the axial force generated by the rolling force) are evenly distributed to six rows of rollers.

[0017] (2) Reducing 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, significantly reducing the stress on the contact surface between the rollers and the raceways.

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

[0019] Figure 1 is the structural schematic diagram of the present invention Figure 1 ; Figure 2 is the structural schematic diagram of the present invention Figure 2 ; Figure 3 is Figure 2 the partial enlarged view of A in Figure 4 is Figure 2 the partial enlarged view of B in Figure 5 is the structural schematic diagram of the working roll of the rolling mill of the present invention; In the figure: 100, the first single-row outer ring, 110, the 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-raceway inner ring, 411, First flat platform, 500, Third double-row inner ring assembly, 510, Third double-raceway inner ring, 511, Second flat platform, 600, Second double-row inner ring assembly, 610, Second double-raceway inner ring, 700, Cage group, 710, Tapered roller, 800, First sealing assembly, 810, First sealing ring, 900, Second sealing assembly, 910, Second sealing ring, 1000, Spring ring, 1100, Inner spacer ring, 1200, Outer spacer ring, 1300, Rolling mill work roll, L, Length of rolling mill work roll, φ, Outer diameter of rolling mill work roll. Detailed implementation manners

[0020] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation manners of the present invention is provided in conjunction with the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0021] Such as Figure 1As shown in the figure, a six-row tapered roller bearing for a working roll of a rolling mill in an embodiment of the present invention includes 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; the two double-row outer rings 300 are arranged side by side; one end of one double-row outer ring 300 is in contact with the first single-row outer ring 100, and one end of the other double-row outer ring 300 is in contact with the second single-row outer ring 200; one side of the first double-row inner ring assembly 400 is in contact with the first single-row outer ring 100, and the other side is in contact with one side of one double-row outer ring 300; one side of the second double-row inner ring assembly is in contact with the other side of one double-row outer ring 300, and the other side is in contact with one side of the other 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 other 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 are of a symmetric structure; the working roll 1300 of the rolling mill operates 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; the first sealing assembly 800 is arranged between the first double-row inner ring assembly 400 and the first single-row outer ring 100; the second sealing assembly 900 is arranged between the third double-row inner ring assembly 500 and the second single-row outer ring 200, and the first sealing assembly 800 and the second sealing assembly 900 are of a symmetric structure.

[0022] It should be noted that within the limited space of the roll journal, the six-row design achieves a very high integration of load-bearing capacity, solving the contradiction between large rolling force and small installation space; compared with using multiple single-row bearings in combination to achieve the same load-bearing capacity, the six-row unit usually 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 groups.

[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 group 700 is arranged 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-raceway inner ring 410. A first flat platform 411 is arranged at one end of the first double-raceway inner ring 410 close to the working roll 1300, and a cage group 700 is arranged in the raceway of the first double-raceway inner ring 410; the third double-row inner ring assembly 500 is provided with a third double-raceway inner ring 510. A second flat platform 511 is arranged at one end of the third double-raceway inner ring 510 close to the working roll 1300, and a cage group 700 is arranged in the raceway of the third double-raceway inner ring 510.

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

[0027] In one embodiment, the double-row outer ring 300 is provided with an oil hole 310. The double-row outer ring 300 forms a symmetric 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; the second single-row outer ring 200 is provided with a second sealing groove 210.

[0028] See attached Figures 3-4 , in one embodiment, the first sealing assembly 800 is provided with a first sealing ring 810. One end of the first sealing ring 810 is disposed in the first sealing groove 110, and the other end is disposed on the first flat platform 411; the second sealing assembly 900 is provided with a second sealing ring 910. One end of the second sealing ring 910 is disposed in the second sealing groove 210, and the other end is disposed on the second flat platform 511; both the first sealing assembly 800 and the second sealing assembly 900 are provided with spring rings 1000, and the spring rings 1000 are 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 is integrated with the working roll) is disposed on the outer diameter of the rolling mill working roll 1300. The bushing can be assembled by hot fitting to make the rolling mill working roll 1300 form a smooth shaft, which is convenient for the assembly of the six-row tapered roller 710 bearing.

[0030] In the above six-row tapered roller 710 bearing of the rolling mill working roll, see attached Figure 2 , preferably, an inner spacer 1100 is disposed between one end of the second double-row inner ring assembly 600 and the first double-row inner ring assembly 400; an inner spacer 1100 is disposed between the other end and the third double-row inner ring assembly 500.

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

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

[0033] It should be noted that in the above-mentioned six-row tapered roller 710 bearings for the work rolls of the rolling mill, although the overall precision requirements are still very high, the six-row bearing units are usually precisely preloaded and paired at the factory (such as through precision grinding of spacer rings). This greatly simplifies the complexity of on-site installation and adjustment and reduces the risk of human error; it is designed in the form of a compact unit with an integral bearing housing (or sleeve), which is convenient for overall hoisting, replacement, and maintenance, and shortens the downtime.

[0034] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by 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. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0035] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0036] In the present invention, unless otherwise clearly specified and defined, the terms "install", "connect", "join", "fix", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature. It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate 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 intermediate element at the same time. The terms "vertical", "horizontal", "above", "below", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

Claims

1. Six-row tapered roller bearings for work rolls of rolling mills, characterized in that: including a first single-row outer ring; a second single-row outer ring; double-row outer rings, two in number; 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; a first double-row inner ring assembly, one side of which is in contact with the first single-row outer ring and the other side of which is in contact with one side of one double-row outer ring; a second double-row inner ring assembly, one side of which is in contact with the other side of one double-row outer ring and the other side of which is in contact with one side of the other double-row outer ring; a third double-row inner ring assembly, one side of which is in contact with the other side of the other double-row outer ring and the other side of which is in contact with the second single-row outer ring; the first double-row inner ring assembly and the third double-row inner ring assembly are of a symmetric structure; the working roll of the rolling mill passes through the second double-row inner ring assembly, the first double-row inner ring assembly and the third double-row inner ring assembly for operation; a first sealing assembly, arranged between the first double-row inner ring assembly and the first single-row outer ring; a second sealing assembly, arranged 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 are of a symmetric structure.

2. The six-row tapered roller bearing for the working roll of a rolling mill 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 cage groups.

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

4. The six-row tapered roller bearing for the work roll of a rolling mill according to claim 2, wherein: The first double-row inner ring assembly is provided with a first double-raceway inner ring, a first flat platform is arranged at one end of the first double-raceway inner ring close to the working roll of the rolling mill, and the cage group is arranged in the raceway of the first double-raceway inner ring; the third double-row inner ring assembly is provided with a third double-raceway inner ring, a second flat platform is arranged at one end of the third double-raceway inner ring close to the working roll of the rolling mill, and the cage group is arranged in the raceway of the third double-raceway inner ring.

5. The six-row tapered roller bearing for the working roll of a rolling mill according to claim 2, wherein: The cage group is provided with tapered rollers, and the tapered rollers are fixed by a cage.

6. The six-row tapered roller bearing for the working roll of a rolling mill according to claim 4, characterized in that: The double-row outer ring is provided with an oil hole, and the double-row outer ring forms a symmetric structure with the axis of the oil hole 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. The six-row tapered roller bearing for the work roll of a rolling mill according to claim 6, characterized in that: The first sealing assembly is provided with a first sealing ring, one end of the first sealing ring is arranged in the first sealing groove, and the other end is arranged on the first flat platform; the second sealing assembly is provided with a second sealing ring, one end of the second sealing ring is arranged in the second sealing groove, and the other end is arranged on the second flat platform; both the first sealing assembly and the second sealing assembly are provided with spring rings, and the spring rings are used to lock the first sealing ring and the second sealing ring.

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

9. The six-row tapered roller bearing for the working roll of a rolling mill 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 double-row outer ring and the other double-row outer ring; an outer spacer is provided between the second single-row outer ring and the other double-row outer ring.

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

Images