Roller-type electromagnetic stirring traveling wave generating device

Abstract

The present application relates to slab continuous casting electromagnetic stirring technical field, especially to a kind of roller electromagnetic stirring travelling wave generating device, comprising: free end end cover, key 1, travelling wave generator, protective cover, key 2 and fixed end end cover group;Electromagnetic stirring roller travelling wave magnetic field generating device is provided with fixed end and free end;Fixed end includes fixed end bearing device, fixed end sealing device, fixed end end cover group is connected with the fixed part of fixed end bearing device, and fixed end end cover group includes: fixed end end cover and outer ball sleeve, the outer spherical surface of outer ball sleeve is engaged with the inner spherical surface of fixed end end cover, so that outer ball sleeve is embedded in fixed end end cover to form ball joint and prevent travelling wave generator axial movement;Free end includes free end bearing device, free end sealing device, free end end cover is connected with the fixed part of free end bearing device, and free end releases the expansion and contraction amount caused by temperature change.In the both sides end of roller electromagnetic stirring travelling wave generating device, cooling water chamber and terminal box are arranged.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic stirring technology for slab continuous casting, and particularly to a roller-type electromagnetic stirring traveling wave generator. Background Technology

[0002] In recent years, with the increasing demand for high-quality thick steel plates in China, roller electromagnetic stirring devices have been widely used as equipment in slab continuous casting processes. This is due to their good metallurgical effect of improving core segregation and enhancing equiaxed crystals in slabs, as well as their minimal modification to the continuous casting line and ease of installation.

[0003] The insufficient rigidity of roller-type electromagnetic stirring devices makes them unsuitable for use on thick slab continuous casting lines. Existing technologies offer two solutions to address this rigidity issue: one is to add supporting rollers in the middle, but the limited contact area (wrap angle) sometimes fails to adequately improve rigidity; the other is to use a segmented electromagnetic stirring roller, mimicking a free roller installation method. However, the large size of the middle segments in existing technologies creates a wide weak magnetic field region, affecting metallurgical performance. This invention provides a roller-type electromagnetic stirring traveling wave generator that effectively solves these application problems, making it a highly suitable solution. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems by proposing a roller-type electromagnetic stirring traveling wave generator. This invention expands the axial space of the coil windings of the traveling wave magnetic field generator through a novel and compact fixed-end structure, while simultaneously reducing the weak magnetic field region at the fixed end. Two roller-type electromagnetic stirring traveling wave generators of this invention (of varying lengths) are fixedly connected back-to-back, ensuring coaxiality to form a novel segmented roller-type electromagnetic stirring traveling wave generator. The two fixed ends, fixed back-to-back, form the intermediate support of the segmented roller-type electromagnetic stirring traveling wave generator. The unique fixed-end structure shortens the axial structure of the intermediate segment, effectively reducing the weak magnetic field region and improving the metallurgical effect. Raised magnetic poles are provided on the working surface of the iron core at the gap between adjacent coil windings of the traveling wave generator. During operation, these poles attract and converge the magnetic field generated by the adjacent coil windings, guiding it towards the molten steel billet core. (When the traveling wave generators are arranged in pairs with mirror images, the magnetic field generated by the adjacent coil windings with opposite magnetic pole polarities converges, penetrating the molten steel billet core from one magnetic pole and guiding it to the other magnetic pole.) This significantly enhances the metallurgical effect.

[0005] To achieve the above objectives, the present invention adopts the following specific technical solution:

[0006] This invention provides a roller-type electromagnetic stirring traveling wave generator, comprising: a free end cap, a key 1, a traveling wave generator, a protective sleeve, a key 2, and a fixed end cap assembly; the traveling wave magnetic field generator of the electromagnetic stirring roller is provided with a fixed end and a free end; the fixed end includes a fixed end bearing device and a fixed end sealing device, and the fixed end cap assembly is connected to the fixed part of the fixed end bearing device; the fixed end cap assembly includes: a fixed end cap and an outer ball sleeve, the fixed end cap having an inner spherical surface, the outer ball sleeve having an outer spherical surface, the outer spherical surface engaging with the inner spherical surface to form a ball joint within the fixed end cap and prevent axial movement of the traveling wave generator; the free end includes a free end bearing device and a free end sealing device, the free end cap being connected to the fixed part of the free end bearing device, and the free end releasing the expansion and contraction of the traveling wave generator and the protective sleeve caused by temperature changes.

[0007] The fixed end cap assembly includes: a fixed end cap and an outer ball sleeve; the fixed end cap has an inner spherical surface, an inner hole and a keyway 1 at its central through hole, and the outer ball sleeve has an outer spherical surface, a keyway 2, a cylindrical surface and a countersunk hole; the cylindrical surface is installed in the inner hole, and the outer spherical surface and the inner spherical surface engage to make the outer ball sleeve embedded in the fixed end cap to form a ball joint; the ball joint is tightly disposed at the central through hole of the fixed end cap.

[0008] The traveling wave generator includes: an iron core, windings, and lead wire assembly; the iron core includes: magnetic poles, a free-end shaft head, a free-end keyway, a fixed-end shaft head, and a fixed-end keyway. The fixed-end shaft head is inserted into the countersunk hole of the outer ball sleeve, and the key 2 is embedded in the fixed-end keyway, keyway 1, and keyway 2 to prevent the traveling wave generator from rotating around its axis and moving axially. The free-end end cap includes: a guide inner hole and a guide keyway; the free-end shaft head is fitted into the guide inner hole and guide keyway of the free-end end cap through the key 1, and the free-end shaft head can move axially in the guide inner hole to release the expansion and contraction of the traveling wave generator caused by temperature changes; the lead wire assembly provides the windings with an alternating power supply of the corresponding number of phases, and the traveling wave generator induces and generates a traveling wave magnetic field.

[0009] The protective sleeve includes a protective sleeve, a roller end shaft, a cavity, a bearing seat 1, and a bearing seat 2. The cavity is adapted to contain the traveling wave generator. The fixed end bearing device includes a fixed end bearing housing, a bearing 1, and an end sleeve 1. The bearing seat 1 of the protective sleeve is inserted into the inner hole of the bearing 1. The end sleeve 1 is fixed to the end of the protective sleeve and defines the axial position of the inner ring of the bearing 1 with the bearing seat 1. The outer ring of the bearing 1 is inserted into the fixed end bearing device. The fixed end cap is fixed to the end of the fixed end bearing housing and defines the axial position of the outer ring of the bearing 1 with the fixed end bearing housing.

[0010] The free-end bearing device includes: a free-end bearing housing, a bearing 2, and an end sleeve 2; the bearing seat 2 of the protective sleeve is inserted into the inner hole of the bearing 2, the end sleeve 2 is fixed to the end of the roller end shaft and defines the axial position of the inner ring of the bearing 2 with the bearing seat 2, the outer ring of the bearing 2 is inserted into the free-end bearing device, the free-end end cap is fixed to the end of the free-end bearing housing, and the end of the free-end end cap and the end of the outer ring of the bearing 2 have sufficient clearance to allow the bearing 2 to slide freely in the free-end bearing housing to release the expansion and contraction of the protective sleeve during thermal expansion and contraction.

[0011] The traveling wave generator is coaxially and airtightly installed in the cavity of the protective sleeve and connected to the free end cap, free end bearing device, fixed end bearing device and fixed end cap assembly, so that the traveling wave generator is circumferentially fixed and the protective sleeve can rotate freely around the traveling wave generator under the action of external force; the fixed end sealing device and the free end sealing device keep the inside of the protective sleeve in a sealed state.

[0012] The iron core is divided into sections with a axial gap and consists of multiple multi-phase coils. A raised magnetic pole is provided on the working surface of the iron core at the gap between adjacent coils. The top of the magnetic pole is higher than the outer surface of the coil. When working, the magnetic pole attracts and converges the magnetic field generated by the adjacent coils to guide the liquid core of the steel billet.

[0013] When the magnetic poles are in operation, they attract and converge the magnetic fields generated by adjacent coils, guiding them to the molten steel core and simultaneously driving the molten steel to circumferentially convect.

[0014] Cooling water chambers and junction boxes are installed at both ends of the roller electromagnetic stirring traveling wave generator, thus forming a slab continuous casting roller electromagnetic stirring device.

[0015] The compact fixed-end structure expands the axial space of the coil windings of the traveling wave magnetic field generator while reducing the weak magnetic region at the fixed end.

[0016] The fixed ends of two roller-type electromagnetic stirring traveling wave generators (of different lengths) of the present invention are fixedly connected back to back, and the two roller-type electromagnetic stirring traveling wave generators are made coaxial to form a novel segmented roller-type electromagnetic stirring traveling wave generator. Cooling water chambers and junction boxes are provided at both ends of the segmented roller-type electromagnetic stirring traveling wave generator, thus forming a novel segmented roller-type electromagnetic stirring device for slab continuous casting.

[0017] Compared with the prior art, the advantages of the present invention are: the present invention effectively reduces the range of the weak magnetic zone of the electromagnetic stirring roller, improves battery efficiency, improves metallurgical effect, greatly improves the rigidity of the electromagnetic stirring roller, and effectively solves the problems existing in the prior art.

[0018] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings.

[0019] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0021] Figure 1 This is a schematic diagram of the structure of a roller-type electromagnetic stirring traveling wave generator according to the present invention;

[0022] Figure 2 This is a schematic diagram of a traveling wave generator according to an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the fixed-end bearing device according to an embodiment of the present invention;

[0024] Figure 4 This is a cross-sectional view of a fixed end cap assembly according to an embodiment of the present invention;

[0025] Figure 5 This is a cross-sectional view of a fixed end cap according to an embodiment of the present invention;

[0026] Figure 6 This is a left view of the fixed end cap according to an embodiment of the present invention;

[0027] Figure 7 This is a cross-sectional view of the outer spherical sleeve according to an embodiment of the present invention;

[0028] Figure 8 for Figure 7 The right view;

[0029] Figure 9 This is a schematic diagram of the structure of a protective sleeve according to an embodiment of the present invention;

[0030] Figure 10 This is a schematic diagram of the free end structure according to an embodiment of the present invention;

[0031] Figure 11 This is a cross-sectional view of the free end cap according to an embodiment of the present invention;

[0032] Figure 12 This is a schematic diagram of the slab continuous casting roller electromagnetic stirring device formed by the present invention.

[0033] Figure 13 for Figure 12 Top view;

[0034] Figure 14 This invention relates to a novel segmented roller electromagnetic stirring device for slab continuous casting.

[0035] In the diagram: 1-Free end cap, 101-Guide inner hole, 102-Guide keyway, 2-Key 1, 3-Traveling wave generator, 301-Iron core, 30101-Magnetic pole, 30102-Free end shaft head, 30103-Free end keyway, 30104-Fixed end shaft head, 30105-Fixed end keyway, 302-Winding, 303-Leader assembly, 8-Protective kit, 4-Key 2, 5-Fixed end cap assembly, 501-Fixed end cap, 50101-Inner spherical surface, 50102-Inner hole, 50103-Keyway 1, 502 - Outer ball sleeve, 50201- Outer spherical surface, 50202- Keyway 2, 50203- Cylindrical surface, 50204- Countersunk hole, 6- Fixed end bearing device, 601- Fixed end bearing seat, 602- Bearing 1, 603- End sleeve 1, 7- Fixed end sealing device, 8- Protective sleeve, 801- Protective sleeve, 802- Roller end shaft, 803- Cavity, 804- Bearing position 1, 805- Bearing position 2, 9- Free end bearing device, 901- Free end bearing seat, 902- Bearing 2, 903- End sleeve 2, 10- Free end sealing device. Detailed Implementation

[0036] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings to further illustrate the technical solutions of the present invention. However, the present invention is not limited to these embodiments.

[0037] This invention appendix Figure 1 To be continued Figure 14 It can be seen from this:

[0038] The roller-type electromagnetic stirring traveling wave generator of the present invention includes: a free end cap (1), a key 1 (2), a traveling wave generator (3), a protective sleeve (8), a key 2 (4), and a fixed end cap assembly (5); the traveling wave magnetic field generator of the electromagnetic stirring roller is provided with a fixed end and a free end; the fixed end includes a fixed end bearing device (6) and a fixed end sealing device (7), and the fixed end cap assembly (5) is connected to the fixed part of the fixed end bearing device (6); the fixed end cap assembly (5) includes: a fixed end cap (501) and an outer ball sleeve (502), the fixed end cap (501) is provided with The outer ball sleeve (502) is provided with an inner spherical surface (50101) and an outer spherical surface (50201). The outer spherical surface (50201) and the inner spherical surface (50101) are engaged so that the outer ball sleeve (502) is embedded in the fixed end cap (501) to form a ball joint and prevent the traveling wave generator from moving axially. The free end includes a free end bearing device (9) and a free end sealing device (10). The free end cap (1) is connected to the fixed part of the free end bearing device (9). The free end releases the amount of expansion and contraction of the traveling wave generator (3) and the protective sleeve (8) caused by temperature changes.

[0039] The fixed end cap assembly (5) of the roller-type electromagnetic stirring traveling wave generator of the present invention includes: a fixed end cap (501) and an outer ball sleeve (502); the fixed end cap (501) is provided with an inner spherical surface (50101), an inner hole (50102) and a keyway 1 (50103) at the central through hole, and the outer ball sleeve (502) is provided with an outer spherical surface (50201), a keyway 2 (50202), a cylindrical surface (50203) and a countersunk hole (50204); the cylindrical surface (50203) is installed in the inner hole (50102), and the outer spherical surface (50201) and the inner spherical surface (50101) engage with each other so that the outer ball sleeve (502) is embedded in the fixed end cap (501) to form a ball joint; the ball joint is tightly set at the central through hole of the fixed end cap (501).

[0040] The traveling wave generator (3) of the roller-type electromagnetic stirring traveling wave generator of the present invention includes: an iron core (301), a winding (302), and a lead wire group (303); the iron core (301) includes: a magnetic pole (30101), a free end shaft head (30102), a free end keyway (30103), a fixed end shaft head (30104), and a fixed end keyway (30105). The fixed end shaft head (30104) is inserted into the countersunk hole (50204) of the outer ball sleeve (502), and the key 2 (4) is embedded in the fixed end keyway (30105), keyway 1 (50103), and keyway 2 (50202) to prevent the traveling wave generator (3) from rotating around its axis and moving axially. The free end cap (1) includes: a guide inner hole (101) and a guide keyway (102); the free end shaft head (30102) is fitted into the guide inner hole (101) and the guide keyway (102) of the free end cap (1) through a key 1 (2), and the free end shaft head (30102) can move axially in the guide inner hole (101) to release the amount of expansion and contraction of the traveling wave generator (3) caused by temperature changes; the winding (302) is provided with an alternating power supply of the corresponding number of phases through the lead wire group (303), and the traveling wave generator (3) induces and generates a traveling wave magnetic field.

[0041] Furthermore, the protective sleeve (8) of the roller electromagnetic stirring traveling wave generator of the present invention includes a protective sleeve (801), a roller end shaft (802), a cavity (803), a bearing seat 1 (804) and a bearing seat 2 (805), the cavity (803) being suitable for containing the traveling wave generator (3); the fixed end bearing device (6) includes: a fixed end bearing seat (601), a bearing 1 (602) and an end sleeve 1 (603); the bearing seat 1 (804) of the protective sleeve (805) is... 4) Inserted into the inner hole of the bearing 1 (602), the end sleeve 1 (603) is fixed to the end of the protective sleeve (801) and defines the axial position of the inner ring of the bearing 1 (602) with the bearing seat 1 (804), the outer ring of the bearing 1 (602) is inserted into the fixed end bearing device (6), and the fixed end cap (501) is fixed to the end of the fixed end bearing seat (601) and defines the axial position of the outer ring of the bearing 1 (602) with the fixed end bearing seat (601).

[0042] Furthermore, the free end bearing device (9) of the roller electromagnetic stirring traveling wave generator of the present invention includes: a free end bearing seat (901), a bearing 2 (902) and an end sleeve 2 (903); the bearing position 2 (805) of the protective sleeve (8) is inserted into the inner hole of the bearing 2 (902), the end sleeve 2 (903) is fixed to the end of the roller end shaft (802) and defines the axial position of the inner ring of the bearing 2 (902) with the bearing position 2 (805), the outer ring of the bearing 2 (902) is inserted into the free end bearing device (9), the free end cap (1) is fixed to the end of the free end bearing seat (901), and the end of the free end cap (1) and the end of the outer ring of the bearing 2 (902) are provided with sufficient gap to allow the bearing 2 (902) to slide freely in the free end bearing seat (901) to release the expansion and contraction of the protective sleeve (8) when the protective sleeve (8) expands and contracts.

[0043] Furthermore, the traveling wave generator (3) of the roller electromagnetic stirring traveling wave generator of the present invention is coaxially and air-separatedly installed in the cavity (803) of the protective sleeve (8) and connected to the free end cap (1), the free end bearing device (9), the fixed end bearing device (6) and the fixed end cap group (5) so that the traveling wave generator (3) is circumferentially fixed and the protective sleeve (8) can rotate freely around the traveling wave generator (3) under the action of external force; the fixed end sealing device (7) and the free end sealing device (10) keep the protective sleeve (8) in a sealed state.

[0044] Furthermore, the core (301) of the roller electromagnetic stirring traveling wave generator of the present invention is segmented with a winding (302) composed of multiple multiphase coils in the outer axial gap. A raised magnetic pole (30101) is provided on the working surface of the core (301) at the gap between adjacent coils. The top of the magnetic pole (30101) is higher than the outer surface of the coil. When the magnetic pole (30101) is working, it attracts and converges the magnetic field generated by the adjacent coils to guide the steel billet liquid core.

[0045] Furthermore, when the magnetic pole (30101) of the roller electromagnetic stirring traveling wave generator of the present invention is working, it attracts and converges the magnetic field generated by the adjacent coil and guides it to the steel billet liquid core to synchronously promote the circumferential convection of the steel liquid.

[0046] Furthermore, such as Figure 12 and Figure 13 Cooling water chambers and junction boxes are respectively provided at both ends of the roller electromagnetic stirring traveling wave generator of the present invention, thus forming a slab continuous casting roller electromagnetic stirring device.

[0047] Furthermore, such as Figure 14By fixing the fixed ends of two roller-type electromagnetic stirring traveling wave generators (of varying lengths) of the present invention back-to-back and ensuring their coaxiality, a novel segmented roller-type electromagnetic stirring traveling wave generator can be formed. Cooling water chambers and junction boxes are respectively installed at both ends of the newly formed segmented roller-type electromagnetic stirring traveling wave generator, thus forming a novel slab continuous casting segmented roller-type electromagnetic stirring device. The two fixed ends, fixed back-to-back, form the intermediate support of the segmented roller-type electromagnetic stirring device. The unique fixed end structure shortens the axial structure of the intermediate segment, effectively reducing the weak magnetic field area and improving the metallurgical effect. Raised magnetic poles are provided on the working surface of the iron core at the gap between adjacent coil windings of the traveling wave generator. During operation, these poles attract and converge the magnetic field generated by the adjacent coil windings, guiding it to the molten steel billet core. (When the traveling wave generators are set in pairs with mirror images to control the magnetic field generated by the adjacent coil windings with opposite polarities, the magnetic field from one magnetic pole penetrates the molten steel billet core and guides it to the other magnetic pole.) This significantly improves electromagnetic efficiency and metallurgical effect.

[0048] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A roller-type electromagnetic stirring traveling wave generator, characterized in that, include: The electromagnetic stirring roller has a free end cap (1), a key 1 (2), a traveling wave generator (3), a protective sleeve (8), a key 2 (4), and a fixed end cap assembly (5); the traveling wave magnetic field generating device of the electromagnetic stirring roller is provided with a fixed end and a free end; the fixed end includes a fixed end bearing device (6) and a fixed end sealing device (7), and the fixed end cap assembly (5) is connected to the fixed part of the fixed end bearing device (6); the fixed end cap assembly (5) includes: a fixed end cap (501) and an outer ball sleeve (502), and the fixed end cap (501) is provided with an inner spherical surface (50101). The outer ball sleeve (502) is provided with an outer spherical surface (50201), which engages with the inner spherical surface (50101) to make the outer ball sleeve (502) embedded in the fixed end cap (501) to form a ball joint and prevent the traveling wave generator from moving axially; the free end includes a free end bearing device (9) and a free end sealing device (10), the free end cap (1) is connected to the fixed part of the free end bearing device (9), and the free end releases the amount of expansion and contraction of the traveling wave generator (3) and the protective sleeve (8) caused by temperature changes.

2. The roller-type electromagnetic stirring traveling wave generator according to claim 1, characterized in that, The fixed end cap assembly (5) includes: a fixed end cap (501) and an outer ball sleeve (502); the fixed end cap (501) is provided with an inner spherical surface (50101), an inner hole (50102) and a keyway 1 (50103) at the center through hole; the outer ball sleeve (502) is provided with an outer spherical surface (50201), a keyway 2 (50202), a cylindrical surface (50203) and a countersunk hole (50204); the cylindrical surface (50203) is installed in the inner hole (50102); the outer spherical surface (50201) and the inner spherical surface (50101) engage with each other so that the outer ball sleeve (502) is embedded in the fixed end cap (501) to form a ball joint; the ball joint is tightly disposed at the center through hole of the fixed end cap (501).

3. The roller-type electromagnetic stirring traveling wave generator according to claim 2, characterized in that, The traveling wave generator (3) includes: an iron core (301), a winding (302), and a lead wire group (303); the iron core (301) includes: a magnetic pole (30101), a free end shaft head (30102), a free end keyway (30103), a fixed end shaft head (30104), and a fixed end keyway (30105); the fixed end shaft head (30104) is inserted into the countersunk hole (50204) of the outer ball sleeve (502), and the key 2 (4) is embedded in the fixed end keyway (30105), keyway 1 (50103), and keyway 2 (50202) to prevent the traveling wave generator (3) from moving. The free end cap (1) rotates and moves axially around its axis; the free end cap (1) includes: a guide inner hole (101) and a guide keyway (102); the free end shaft head (30102) is fitted into the guide inner hole (101) and the guide keyway (102) of the free end cap (1) through the key 1 (2), and the free end shaft head (30102) can move axially in the guide inner hole (101) to release the expansion and contraction of the traveling wave generator (3) caused by temperature changes; the winding (302) is provided with an alternating power supply of the corresponding number of phases through the lead wire group (303), and the traveling wave generator (3) induces and generates a traveling wave magnetic field.

4. The roller-type electromagnetic stirring traveling wave generator according to claim 2, characterized in that, The protective sleeve (8) includes a protective sleeve (801), a roller end shaft (802), a cavity (803), a bearing seat 1 (804), and a bearing seat 2 (805), wherein the cavity (803) is adapted to accommodate the traveling wave generator (3); the fixed end bearing device (6) includes a fixed end bearing seat (601), a bearing 1 (602), and an end sleeve 1 (603); the bearing seat 1 (804) of the protective sleeve (8) is inserted into the bearing 1. The inner hole of (602) is provided, the end sleeve 1 (603) is fixed to the end of the protective sleeve (801) and defines the axial position of the inner ring of the bearing 1 (602) with the bearing seat 1 (804), the outer ring of the bearing 1 (602) is inserted into the fixed end bearing device (6), and the fixed end cap (501) is fixed to the end of the fixed end bearing seat (601) and defines the axial position of the outer ring of the bearing 1 (602) with the fixed end bearing seat (601).

5. The roller-type electromagnetic stirring traveling wave generator according to claim 4, characterized in that, The free end bearing device (9) includes: a free end bearing housing (901), a bearing 2 (902), and an end sleeve 2 (903); the bearing position 2 (805) of the protective sleeve (8) is inserted into the inner hole of the bearing 2 (902), the end sleeve 2 (903) is fixed to the end of the roller end shaft (802) and defines the axial position of the inner ring of the bearing 2 (902) with the bearing position 2 (805), the outer ring of the bearing 2 (902) is inserted into the free end bearing device (9), the free end cap (1) is fixed to the end of the free end bearing housing (901), and the end of the free end cap (1) and the end of the outer ring of the bearing 2 (902) are provided with sufficient gap to allow the bearing 2 (902) to slide freely in the free end bearing housing (901) to release the expansion and contraction of the protective sleeve (8) when the protective sleeve (8) expands and contracts.

6. The roller-type electromagnetic stirring traveling wave generator according to any one of claims 1-5, characterized in that, The traveling wave generator (3) is coaxially and air-separatedly installed in the cavity (803) of the protective sleeve (8) and connected to the free end cap (1), the free end bearing device (9), the fixed end bearing device (6) and the fixed end cap group (5) so that the traveling wave generator (3) is circumferentially fixed and the protective sleeve (8) can rotate freely around the traveling wave generator (3) under the action of external force; the fixed end sealing device (7) and the free end sealing device (10) keep the protective sleeve (8) in a sealed state.

7. The roller-type electromagnetic stirring traveling wave generator according to claim 3, characterized in that, The iron core (301) is divided into sections with a gap on the outer axial direction and a winding (302) composed of multiple multi-phase coils is provided. A raised magnetic pole (30101) is provided on the working surface of the iron core (301) at the gap between adjacent coils. The top of the magnetic pole (30101) is higher than the outer surface of the coil. When the magnetic pole (30101) is working, it attracts and converges the magnetic field generated by the adjacent coils to guide the liquid core of the steel billet.

8. The roller-type electromagnetic stirring traveling wave generator according to claim 7, characterized in that, When the magnetic pole (30101) is working, it attracts and converges the magnetic field generated by the adjacent coil, which is guided to the molten steel core to simultaneously promote the circumferential convection of the molten steel.

9. The roller-type electromagnetic stirring traveling wave generator according to any one of claims 1-5, characterized in that, Cooling water chambers and junction boxes are installed at both ends of the roller electromagnetic stirring traveling wave generator, thus forming a slab continuous casting roller electromagnetic stirring device.

Images