A three-section roller for the bending section of a continuous casting machine
By designing a three-part roller structure of the continuous casting machine curved section including a mandrel, a roller sleeve and a spherical bearing, the problem of shortening the bearing life and difficulty in achieving axial twitching adaptation in the prior art is solved, efficient axial displacement and centering function are achieved, and service life and load bearing capacity are improved.
Patent Information
- Application Number
- CN202411906722.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-04-08
AI Technical Summary
The bearing life of the three-part rollers in the bending section of the existing continuous casting machine is shortened under high temperature and heavy loads, making it difficult to achieve the adaptation and centering function of axial twitching, and the complex structure leads to insufficient load-bearing capacity.
A three-part roller structure including a mandrel, a roller sleeve and a spherical bearing is designed. Multiple roller sleeves and bearing seats are installed on the mandrel. The roller sleeve and the mandrel are rotatably connected by a spherical bearing. The spherical bearing has strong load-bearing capacity, center-aligning function and axial displacement capability.
The service life of the three-part roller is improved, and the adaptation of axial displacement and center-aligning functions is achieved. It has simple structure, easy manufacturing and repair, and stable performance. It can directly replace the existing structural type of continuous casting machine bent section three-part roller.
Smart Images
Figure CN119778378A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the field of continuous casting machine manufacturing, and in particular relates to a three-section roller of a bending section of a continuous casting machine. Background Art
[0002] At present, in the prior art, the three-section rollers of the bending section of the continuous casting machine mostly adopt a segmented roller structure, which installs multiple bearing positions on each segmented roller to cope with the expansion and contraction caused by bending and temperature changes. However, the segmented roller structure has some technical problems: first, the middle bearing position is subjected to high temperature and heavy load due to the harsh working environment, which shortens the bearing life and affects the stability of the continuous casting machine. Secondly, it is difficult for this structure to adapt to axial movement and align the heart. Traditional spherical roller bearings are difficult to provide axial floating adaptive capabilities, while cylindrical roller bearings cannot achieve effective aligning.
[0003] In order to take into account the axial displacement and self-aligning functions, the design of the rolling element and inner and outer rings of traditional bearings is very complicated, resulting in the contact area between the rolling element and the inner and outer rings being only about 70%, which cannot achieve full contact and reduces the load capacity. In addition, under eccentric working conditions, the bearing is unevenly stressed, which can easily lead to local overload failure.
[0004] Therefore, in view of the shortcomings of the above-mentioned solution in actual production and implementation, a three-section roller of the bending section of a continuous casting machine is specially provided to solve the above-mentioned technical problems. Summary of the invention
[0005] The invention provides a three-section roller of a bending section of a continuous casting machine, which solves the problems in the prior art.
[0006] The technical solution of the present invention is implemented as follows: a three-section roller of a bending section of a continuous casting machine includes a core shaft, a plurality of roller sleeves are installed on the core shaft, and a plurality of bearing seats are installed on the core shaft, wherein two bearing seats are located at both ends of the core shaft, and each of the remaining bearing seats is located between two adjacent roller sleeves, and the roller sleeves are rotatably connected to the core shaft through a bearing assembly.
[0007] As a preferred embodiment, one end of the core shaft is a fixed end, and the other end is a movable end. The two bearing seats located at both ends of the core shaft correspond to the fixed end and the movable end respectively. The two bearing seats are locked and fixed to the core shaft by a first fixing member and a second fixing member respectively.
[0008] As a preferred embodiment, the first fixing member is a positioning bolt, and the bearing seat corresponding to the fixed end position is locked and fixed to the core shaft through the positioning bolt; the second fixing member is a positioning nut, and the second positioning nut is threadedly installed on the movable end of the core shaft, and the bearing seat corresponding to the movable end position is locked and fixed to the core shaft through the positioning nut.
[0009] As a preferred embodiment, the bearing assembly includes two bearings installed between each roller sleeve and the core shaft, a first distance sleeve is arranged between the two bearings, and the first distance sleeve is fixedly connected to the core shaft.
[0010] As a preferred embodiment, a space is left between the core shaft and the roller sleeve, and a boss is provided on the inner wall of the roller sleeve. The boss divides the space between the core shaft and the roller sleeve into two placement cavities. The two bearings in the bearing assembly are respectively installed in the two placement cavities. Second distance sleeves are respectively installed at the ports of the two placement cavities, and each bearing is located between the boss and the second distance sleeve.
[0011] As a preferred implementation, isolation rings are respectively installed on both sides of the bearing.
[0012] As a preferred implementation, a sealing ring is installed between the side wall of the second distance sleeve and the roller sleeve.
[0013] As a preferred implementation, the bearing is a spherical bearing.
[0014] As a preferred embodiment, the core shaft is provided with an oil chamber, one end port of the oil chamber is located at the end of the core shaft, and the other end port of the oil chamber corresponds to the position of the bearing assembly.
[0015] As a preferred embodiment, three roller sleeves are installed on the core shaft.
[0016] After adopting the above technical scheme, the beneficial effects of the present invention are as follows: the present invention discloses a three-section roller of the bending section of a continuous casting machine. The three-section roller of this structural type has the same installation dimensions and external dimensions as the existing three-section roller, and can directly replace the three-section roller of the bending section of the existing continuous casting machine. The three-section roller of this structural type has the advantages of simple structure, easy manufacturing and repair, convenient assembly, stable performance, and long service life. Both ends of the roller sleeve are mounted on the core shaft through spherical bearings. The spherical bearings not only have a strong load-bearing capacity, but also have a self-aligning function and the ability to allow axial displacement within a certain range. Due to the above advantages of spherical bearings, the use of spherical bearings on the three-section roller can greatly increase the service life. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;
[0019] Figure 2 It is a schematic diagram of the overall side view structure of the present invention;
[0020] Figure 3 for Figure 2 AA structure cross-sectional view;
[0021] Figure 4 It is a schematic cross-sectional view of a local structure of the present invention;
[0022] Figure 5 It is a schematic diagram of the cross-sectional structure of the mandrel of the present invention.
[0023] In the figure, 1, first bearing seat; 2, core shaft; 3, second distance sleeve; 4, spherical bearing; 5, roller sleeve; 6, first distance sleeve; 7, sealing ring; 8, second bearing seat; 9, retaining ring; 10, positioning nut; 11, positioning hole; 12, second isolating ring; 13, first isolating ring; 14, positioning bolt; 15, third bearing seat; 16, boss; 17, oil chamber. DETAILED DESCRIPTION
[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0025] like Figure 1 , Figure 2 As shown, a three-section roller of a bending section of a continuous casting machine includes a core shaft 2, three roller sleeves 5 are installed on the core shaft 2, and more than five bearing seats are installed on the core shaft 2, wherein two bearing seats are located at both ends of the core shaft 2, and the remaining three bearing seats (i.e., the second bearing seat 8) are located between two adjacent roller sleeves 5, and the roller sleeve 5 is rotatably connected to the core shaft 2 through a bearing assembly.
[0026] In this embodiment, one end of the core shaft 2 is a fixed end and the other end is a movable end. The two bearing seats located at both ends of the core shaft 2 correspond to the fixed end and the movable end respectively. The two bearing seats are locked and fixed to the core shaft 2 by the first fixing member and the second fixing member respectively.
[0027] The first fixing member is a positioning bolt 14 , and the bearing seat corresponding to the fixed end position (ie, the first bearing seat 1 ) is locked and fixed to the core shaft 2 through the positioning bolt 14 .
[0028] Specifically, the first bearing seat 1 is provided with a threaded hole, the core shaft 2 is correspondingly provided with a positioning hole 11 , and the end of the positioning bolt 14 passes through the threaded hole and enters into the positioning hole 11 .
[0029] The second fixing member is a positioning nut 10 , which is threadedly mounted on the movable end of the core shaft 2 , and a bearing seat (i.e., the third bearing seat 15 ) corresponding to the position of the movable end is locked and fixed to the core shaft 2 through the positioning nut 10 .
[0030] Specifically, the movable end of the core shaft 2 is provided with a thread, and the positioning nut 10 is threadedly mounted on the movable end.
[0031] Specifically, a retaining ring 9 is installed between the bearing seat corresponding to the movable end of the core shaft 2 and the core shaft 2 .
[0032] The bearing assembly includes two bearings installed between each roller sleeve 5 and the core shaft 2 , a first distance sleeve 6 is arranged between the two bearings, and the first distance sleeve 6 is fixedly connected to the core shaft 2 .
[0033] Specifically, the inner wall of the inner ring of the bearing contacts the side wall of the core shaft 2 , and the outer wall of the outer ring of the bearing contacts the inner wall of the roller sleeve 5 .
[0034] A space is left between the core shaft 2 and the roller sleeve 5, and a boss 16 is provided on the inner wall of the roller sleeve 5. The boss 16 divides the space between the core shaft 2 and the roller sleeve 5 into two placement cavities. The two bearings in the bearing assembly are respectively installed in the two placement cavities. Second distance sleeves 3 are respectively installed at the ports of the two placement cavities, and each bearing is located between the boss 16 and the second distance sleeve 3.
[0035] Specifically, the second distance sleeve 3 is fixedly connected to the core shaft 2 .
[0036] A first isolating ring 13 and a second isolating ring 12 are respectively installed on both sides of the bearing.
[0037] Specifically, Figure 4 As shown, one side of the isolating ring contacts the side wall of the boss 16, and the other side contacts the outer ring of the bearing.
[0038] A sealing ring 7 is installed between the side wall of the second distance sleeve 3 and the roller sleeve 5. Through this arrangement, dust, water, water vapor, etc. can be prevented from entering the interior of the bearing.
[0039] In this embodiment, the bearing is a spherical bearing 4. The spherical bearing 4 not only has a strong load-bearing capacity, but also has a self-aligning function and the ability to allow axial displacement within a certain range.
[0040] like Figure 5 As shown, the core shaft 2 is provided with an oil chamber 17, one end of the oil chamber 17 is located at the end of the core shaft 2, and the other end of the oil chamber 17 corresponds to the position of the bearing assembly.
[0041] In this embodiment, three roller sleeves 5 are installed on the core shaft 2 .
[0042] In this embodiment, a stainless steel wear-resistant layer is welded on the outer surface of the roller sleeve 5 to improve the wear resistance of the three-section roller.
[0043] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A three-section roller of a bending section of a continuous casting machine, comprising a mandrel (2), on which a plurality of roller sleeves (5) are mounted, characterized in that: A plurality of bearing seats are mounted on the core shaft (2), wherein two bearing seats are located at both ends of the core shaft (2), and each of the remaining bearing seats is located between two adjacent roller sleeves (5), and the roller sleeves (5) are rotatably connected to the core shaft (2) via a bearing assembly.
2. The three-section roller of the bending section of a continuous casting machine according to claim 1, characterized in that: One end of the core shaft (2) is a fixed end, and the other end is a movable end. The two bearing seats located at the two ends of the core shaft (2) correspond to the fixed end and the movable end respectively. The two bearing seats are locked and fixed to the core shaft (2) by a first fixing member and a second fixing member respectively.
3. The three-section roller of the bending section of a continuous casting machine according to claim 2, characterized in that: The first fixing member is a positioning bolt (14), and the bearing seat corresponding to the fixed end position is locked and fixed to the core shaft (2) through the positioning bolt (14); the second fixing member is a positioning nut (10), and the second positioning nut (10) is threadedly installed on the movable end of the core shaft (2), and the bearing seat corresponding to the movable end position is locked and fixed to the core shaft (2) through the positioning nut (10).
4. The three-section roller of the bending section of a continuous casting machine according to claim 1, characterized in that: The bearing assembly comprises two bearings installed between each roller sleeve (5) and the core shaft (2), a first distance sleeve (6) is arranged between the two bearings, and the first distance sleeve (6) is fixedly connected to the core shaft (2).
5. The three-section roller of the bending section of a continuous casting machine according to claim 4, characterized in that: A space is left between the core shaft (2) and the roller sleeve (5), and a boss is provided on the inner wall of the roller sleeve (5). The boss divides the space between the core shaft (2) and the roller sleeve (5) into two placement cavities. Two bearings in the bearing assembly are respectively installed in the two placement cavities. Second distance sleeves (3) are respectively installed at the ports of the two placement cavities. Each bearing is located between the boss and the second distance sleeve (3).
6. A three-section roller in a bending section of a continuous casting machine according to claim 5, characterized in that: Isolation rings are respectively installed on both sides of the bearing.
7. The three-section roller of the bending section of a continuous casting machine according to claim 5, characterized in that: A sealing ring (7) is installed between the side wall of the second distance sleeve (3) and the roller sleeve (5).
8. The three-section roller of the bending section of a continuous casting machine according to claim 4, characterized in that: The bearing is a spherical bearing (4).
9. The three-section roller of the bending section of a continuous casting machine according to claim 1, characterized in that: The core shaft (2) is provided with an oil chamber (17), one end port of the oil chamber (17) is located at the end of the core shaft (2), and the other end port of the oil chamber (17) corresponds to the position of the bearing assembly.
10. The three-section roller of the bending section of a continuous casting machine according to claim 1, characterized in that: Three roller sleeves (5) are installed on the core shaft (2).