A shaft sleeve assembly unit and three-section roller for a continuous casting machine sector
By designing a sleeve combination unit for the continuous casting machine sector section, including a roller sleeve and a short shaft for interference fit, the problem of short service life of the three-part roller under high temperature and heavy load conditions is solved, and higher rigidity, cooling effect and stability are achieved.
Patent Information
- Application Number
- CN202411906721.9
- 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 three-part section rollers in the continuous casting machine have a short service life under high temperature and heavy load conditions. Traditional bearings lack the ability to adjust the center when bending, resulting in uneven stress and aggravated local overload wear. The segmented roller structure has shortcomings in axial squirming and center-aligning functions.
A shaft sleeve combination unit for the sector section of a continuous casting machine is designed, including a roller sleeve and a short shaft of interference fit. The short shaft is inserted into the inside of the roller sleeve to form a coaxial connection, improve overall rigidity and coaxiality, and cool through the central hole to enhance sealing.
This structure improves the overall rigidity and cooling effect of the three-part roller, extends the service life, and solves the problem of insufficient centering ability of traditional bearings when bending, achieving better sealing and stability.
Smart Images
Figure CN119772127A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of continuous casting machines, and in particular to a shaft sleeve combination unit and a three-section roller for a sector segment of a continuous casting machine. Background Art
[0002] In the steel production process, the three-section rollers of the continuous casting machine are used to support and guide the arc-shaped ingots. However, there are several problems in the operation of this equipment. First, due to the harsh continuous casting production environment, the three-section rollers are under high temperature and heavy load working conditions for a long time, which greatly affects the working life of the bearings. Traditional three-section rollers generally use needle roller bearings, but needle roller bearings lack the ability to align the shaft when it bends and cannot adapt to bending changes. This will lead to uneven force, aggravated local overload wear, and ultimately affect the life of the bearings, thereby reducing the life of the entire roller.
[0003] Secondly, in the production conditions of the continuous casting machine, the three-section roller usually adopts a segmented roller structure, and multiple bearing positions are installed on one roller to cope with the expansion and contraction of the three-section roller during bending and temperature changes. However, due to the uneven bearing position and load, especially the greater heat and force on the middle bearing position, the middle bearing is prone to failure and has a short service life. In addition, the segmented roller structure has obvious deficiencies in achieving axial movement and self-aligning functions. Although the spherical roller bearing has the self-aligning function, it cannot provide sufficient axial floating adaptive capability; and although the cylindrical roller bearing allows axial displacement, it lacks self-aligning performance and is difficult to meet the changing dynamic working conditions in the arc section of the continuous casting machine.
[0004] Thirdly, the contact area between the rolling element and the inner and outer rings of existing needle roller bearings, spherical roller bearings or cylindrical roller bearings is limited, usually only about 70% of the rolling element length, and cannot achieve full contact, and the load-bearing capacity is weak. In the eccentric state, the force is uneven, and the parts with large loads are prone to failure due to overload, resulting in increased bearing wear and affecting the running stability of the three-section roller.
[0005] In addition, the split bearing seat design of the segmented roller also has some defects during installation and use, including difficult cooling, low strength, poor sealing, easy overheating, deformation, wear, etc. Summary of the invention
[0006] The present invention provides a shaft sleeve assembly unit and a three-section roller for a continuous casting machine sector, the purpose of which is to overcome the above disadvantages.
[0007] To achieve the above object, the technical solution of one aspect of the present invention is:
[0008] A shaft sleeve assembly unit for a continuous casting machine segment, comprising:
[0009] Roller sleeve; two short shafts installed at both ends of the roller sleeve with interference fit, the roller sleeve and the short shafts are both provided with concentric through holes with the same diameter, one end of the two short shafts extends from both ends of the roller sleeve, and the other end is partially inserted into the roller sleeve, and the sum of the lengths of the two short shafts inserted into the roller sleeve is less than the total length of the roller sleeve.
[0010] As a preferred implementation, a stainless steel wear-resistant layer is provided on the outer side of the roller sleeve.
[0011] The technical solution of another aspect of the present invention is:
[0012] A three-section roller for a continuous casting machine fan-shaped segment comprises three shaft sleeve assembly units as described above which are arranged in sequence, wherein the central shaft sleeve assembly unit shares one short shaft with two end shaft sleeve assembly units respectively, the short shafts on both sides of the middle shaft sleeve assembly unit are sleeved with the central bearing assembly, and the short shafts on the side of the end shaft sleeve assembly unit away from the middle shaft sleeve assembly unit are sleeved with the end bearing assembly.
[0013] As a preferred embodiment, the center bearing assembly is an integral structure, including a center bearing and a center bearing seat arranged outside the center axis, and the center bearing is a spherical bearing.
[0014] As a preferred embodiment, the short shafts on both sides of the middle shaft sleeve assembly unit are respectively sleeved on the center bearing, and a first distance ring is provided on both sides of the center bearing. The outer side of the first distance ring abuts against the center shaft sleeve, and a laminated sealing ring and a lip sealing ring are provided on the top of the first distance ring in sequence from the center to the outside.
[0015] As a preferred embodiment, the end bearing assembly is a split structure, including an end bearing seat and an end bearing mounted on the end bearing seat, and the end bearing is a spherical roller bearing.
[0016] As a preferred embodiment, an end cover is installed on the outer side of the end bearing seat, and a rotary joint is installed on the end cover, and the rotary joint is adapted to the short shaft of the end shaft sleeve assembly unit away from the middle shaft sleeve assembly unit.
[0017] As a preferred embodiment, a second distance ring is provided on the inner side of the end bearing and a locking retaining ring is provided on the outer side, the other side of the second distance ring abuts against the short shaft of the end shaft sleeve assembly unit, and the other side of the second distance ring abuts against the end cover, and the second distance ring and the locking retaining ring are respectively provided with a laminated sealing ring and a lip sealing ring in sequence from the center to the outside, and a locking retaining ring is provided between the outer side of the laminated sealing ring and the end cover.
[0018] As a preferred embodiment, one of the end bearings and the locking retaining ring is further provided with a retaining ring.
[0019] As a preferred embodiment, the central bearing assembly and / or the end bearing assembly is provided with a through hole communicating with the shaft sleeve assembly unit.
[0020] The beneficial effects achieved by the present invention are:
[0021] This structure is easy to improve the overall rigidity of the three-section roller; it can better ensure the coaxiality of the roller sleeve and the short shaft; there is no gap at the connection between the roller sleeve and the short shaft, and no sealing ring is set, so there will be no aging of the sealing ring and water leakage, and the sealing performance is good; the cooling water directly cools the roller sleeve and the connecting shaft through the central hole, which improves the overall cooling effect of the three-section roller and can greatly increase the life of the three-section roller; the three-section roller of this structural type is compatible with the existing type of three-section roller in terms of installation dimensions and external dimensions, and can directly replace the existing type of continuous casting machine three-section roller. The three-section roller can be used for the arc section, straightening section, and horizontal section of the continuous casting machine, and has the advantages of simple structure, easy manufacturing and repair, convenient assembly, stable performance, and long life. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a schematic diagram of the overall structure of the three-section roller of the present invention;
[0023] Figure 2 For Figure 1 Schematic diagram of the overall cross-section of the three-section roller;
[0024] Figure 3 for Figure 2 A magnified image of point A;
[0025] Figure 4 It is a partial cross-sectional schematic diagram of a three-section roller;
[0026] In the figure, 1, roller sleeve; 2, short shaft; 3, through hole; 5, center bearing; 6, center bearing seat; 7, first distance ring; 8, laminated seal ring; 9, lip seal ring; 10, end bearing seat; 11, end bearing; 12, end cover; 13, rotary joint; 14, second distance ring; 15, locking retaining ring; 16, retaining ring; 17, center bearing assembly; 18, end bearing assembly. DETAILED DESCRIPTION
[0027] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0028] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0029] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0030] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.
[0031] like Figure 1 , Figure 2 As shown, a sleeve assembly unit for a continuous casting machine segment comprises:
[0032] Roller sleeve 1; two short shafts 2 are installed at both ends of the roller sleeve 1 by interference fit, and the roller sleeve 1 and the short shaft 2 are both provided with concentric through holes 3 with the same diameter, one end of the two short shafts 2 extends from both ends of the roller sleeve 1, and the other end is partially inserted into the roller sleeve 1, and the sum of the lengths of the two short shafts 2 inserted into the roller sleeve 1 is less than the total length of the roller sleeve 1. A through hole is provided in the center. A through hole is provided in the center of the short shaft 2. The roller sleeve 1 and the short shaft 2 are connected by interference fit. This structure is easy to improve the overall rigidity of the three-section roller; it can better ensure the coaxiality of the roller sleeve 1 and the short shaft 2; there is no gap at the connection between the roller sleeve 1 and the short shaft 2, and no sealing ring is provided, so the sealing ring aging problem will not occur and cause water leakage, and the sealing performance is good; the cooling water directly cools the roller sleeve 1 and the connecting shaft through the central hole, which improves the overall cooling effect of the three-section roller and can greatly improve the life of the three-section roller.
[0033] Preferably, a stainless steel wear-resistant layer is provided on the outer side of the roller sleeve 1 to improve the wear resistance of the three-section roller.
[0034] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 A three-section roller for a continuous casting machine fan-shaped segment comprises three sleeve assembly units as described above arranged in sequence, the sleeve assembly unit at the center shares one short shaft 2 with the two end sleeve assembly units respectively, the short shafts 2 on both sides of the middle sleeve assembly unit are sleeved with the center bearing assembly 17, and the short shafts 2 on the side of the end sleeve assembly unit away from the middle sleeve assembly unit are sleeved with the end bearing assembly 18. The three-section roller of this structural type is compatible with the existing three-section roller in terms of installation dimensions and external dimensions, and can directly replace the existing three-section roller of the continuous casting machine. The three-section roller can be used for the arc segment, straightening segment, and horizontal segment of the continuous casting machine, and has the advantages of simple structure, easy manufacturing and repair, convenient assembly, stable performance, and long service life.
[0035] In this embodiment, the central bearing assembly 17 is an integral structure, including a central bearing 5 and a central bearing seat 6 arranged outside the central axis, and the central bearing 5 is a spherical bearing.
[0036] The two center bearing assemblies 17 are integral, that is, the bearing seat and the spherical bearing are an integral whole, and the bearing seat not only provides support for the spherical bearing, but also serves as the outer ring of the spherical bearing. The spherical bearing not only has the function of self-aligning, but also has the function of allowing axial displacement within a certain range. Due to the integrated structure, the introduction of cooling water on the center bearing seat 6 can better cool the bearing, improve the working condition of the bearing, and increase the service life of the three-section roller.
[0037] Specifically, the short shafts 2 on both sides of the middle shaft sleeve assembly unit are respectively sleeved on the central bearing 5, and a first distance ring 7 is provided on both sides of the central bearing 5. The outer side of the first distance ring 7 abuts against the central shaft sleeve, and a laminated sealing ring 8 and a lip sealing ring 9 are provided on the top of the first distance ring 7 in sequence from the center to the outside.
[0038] Preferably, the end bearing assembly 18 is a split structure, including an end bearing seat 10 and an end bearing 11 installed on the end bearing seat 10, and the end bearing 11 is a spherical roller bearing.
[0039] Specifically, an end cover 12 is installed on the outer side of the end bearing seat 10, and a rotary joint 13 is installed on the end cover 12. The rotary joint 13 is adapted to the short shaft 2 on the side of the end shaft sleeve assembly unit away from the middle shaft sleeve assembly unit.
[0040] Preferably, a second distance ring 14 is provided on the inner side of the end bearing 11, and a locking retaining ring 15 is provided on the outer side, the other side of the second distance ring 14 abuts against the short shaft 2 of the end shaft sleeve assembly unit, and the other side of the second distance ring 14 abuts against the end cover 12, and the second distance ring 14 and the locking retaining ring 15 are respectively provided with a laminated sealing ring 8 and a lip sealing ring 9 from the center to the outside, and a locking retaining ring 15 is provided between the outer side of the laminated sealing ring 8 and the end cover 12.
[0041] Preferably, one of the end bearings 11 and the locking retaining ring 15 is further provided with a retaining ring 16 .
[0042] As a preferred embodiment, the central bearing assembly 17 and / or the end bearing assembly 18 is provided with a through hole communicating with the shaft sleeve assembly unit.
[0043] The end bearing assembly 18 is a split type, the end bearing seat 10 and the end bearing 11 are independent of each other, and the spherical roller bearing is installed in the bearing seat to provide support for the three-section roller. An end cover 12 is installed on the outside of the bearing seat, and a rotating joint 13 is installed on both end covers 12.
[0044] The roller sleeve 1, the short shaft 2, and the rotary joint 13 can form a cooling water circuit to cool the roller sleeve 1. The bearing seat can be provided with a cooling water tank and a water hole at the bottom to form a cooling water circuit to cool the bearing. The cooling water channel of this structure can realize the cooling water directly cooling the roller sleeve 1 and the short shaft 2, which can provide better cooling for the three-section roller and improve the service life of the three-section roller.
[0045] The bearing seat is provided with a through hole, through which the lubricating oil can enter the interior of the bearing to lubricate the bearing; it can also lubricate the lip seal ring 9 and the laminated seal ring 8.
[0046] The bearing seat is provided with an end cover 12, and the end cover 12 is provided with a lip seal ring 9 and a laminated seal ring 8 to prevent dust, water, water vapor, etc. from entering the interior of the bearing.
[0047] The above is a detailed description of the present invention, the purpose of which is to enable people familiar with the technology in this field to understand the content of the present invention and implement it, and it is not intended to limit the scope of protection of the present invention. The present invention is not limited to the above-mentioned embodiments. Any equivalent changes or modifications made according to the spirit of the present invention should be covered within the scope of protection of the present invention.
Claims
1. A sleeve assembly unit for a continuous casting machine segment, characterized in that: include: Roller sleeve; two short shafts installed at both ends of the roller sleeve with interference fit, the roller sleeve and the short shafts are both provided with concentric through holes with the same diameter, one end of the two short shafts extends from both ends of the roller sleeve, and the other end is partially inserted into the roller sleeve, and the sum of the lengths of the two short shafts inserted into the roller sleeve is less than the total length of the roller sleeve.
2. A shaft sleeve assembly unit for a continuous casting machine segment according to claim 1, characterized in that: A stainless steel wear-resistant layer is arranged on the outer side of the roller sleeve.
3. A three-section roller for a continuous casting machine segment, characterized in that: It comprises three shaft sleeve assembly units as claimed in claim 1 or 2 which are arranged in sequence, wherein the central shaft sleeve assembly unit shares one short shaft with the two end shaft sleeve assembly units respectively, the short shafts on both sides of the middle shaft sleeve assembly unit are sleeved with the central bearing assembly, and the short shafts on the side of the end shaft sleeve assembly unit away from the middle shaft sleeve assembly unit are sleeved with the end bearing assembly.
4. A three-section roller for a continuous casting machine segment according to claim 3, characterized in that: The central bearing assembly is an integral structure, comprising a central bearing and a central bearing seat arranged outside the central axis, and the central bearing is a spherical bearing.
5. A three-section roller for a continuous casting machine segment according to claim 3, characterized in that: The short shafts on both sides of the middle shaft sleeve assembly unit are respectively sleeved on the central bearing, and a first distance ring is provided on both sides of the central bearing. The outer side of the first distance ring abuts against the central shaft sleeve, and a laminated sealing ring and a lip sealing ring are sequentially provided on the first distance ring from the center to the outside.
6. A three-section roller for a continuous casting machine segment according to claim 3, characterized in that: The end bearing assembly is a split structure, comprising an end bearing seat and an end bearing mounted on the end bearing seat, and the end bearing is a spherical roller bearing.
7. A three-section roller for a continuous casting machine segment according to claim 6, characterized in that: An end cover is arranged outside the end bearing seat, and a rotary joint is installed on the end cover. The rotary joint is adapted to the short shaft of the end shaft sleeve assembly unit away from the middle shaft sleeve assembly unit.
8. A three-section roller for a continuous casting machine segment according to claim 7, characterized in that: A second distance ring is provided on the inner side of the end bearing and a locking retaining ring is provided on the outer side. The other side of the second distance ring abuts against the short shaft of the end shaft sleeve assembly unit, and the other side of the second distance ring abuts against the end cover. The second distance ring and the locking retaining ring are respectively provided with a laminated sealing ring and a lip sealing ring in sequence from the center to the outside, and a locking retaining ring is provided between the outer side of the laminated sealing ring and the end cover.
9. The three-section roller for a continuous casting machine segment according to claim 8, characterized in that: One of the end bearings and the locking retaining ring is also provided with a retaining ring.
10. A three-section roller for a continuous casting machine segment according to claim 3, characterized in that: The central bearing assembly and / or the end bearing assembly is provided with a through hole communicating with the shaft sleeve assembly unit.