Water-cooled cast roller

Abstract

The utility model provides a water-cooling casting roller, which belongs to the technical field of metal material production, and adopts the structural design that annular water channels are arranged on the periphery of a roller body section, a roller core water inlet hole and a roller core water return hole are formed in a roller core, and an independent circulating system is arranged through every two annular water channels. According to the cooling device, cooling water can uniformly enter each annular water channel from at least three positions on the circumference, so that the cooling uniformity is high, the cooling is more efficient and rapid, the production requirements of magnesium alloy cast plate strips with the width of 1200 mm or above can be met, the cast rolling production process of the wide magnesium alloy is more stable, and the plate erecting process is easier.

Description

Technical Field

[0001] This utility model relates to the field of metal material production technology, and more specifically, to a water-cooled casting roll. Background Technology

[0002] Magnesium alloys possess characteristics such as low density, high specific strength and specific stiffness, good vibration damping, excellent electromagnetic shielding performance, and radiation resistance. Therefore, magnesium alloys have significant application value and broad application prospects in fields such as automobiles, electronics, electrical appliances, aerospace, defense, and transportation.

[0003] The new energy vehicle industry is developing rapidly, and new energy vehicles are very sensitive to overall weight, so the demand for magnesium alloy materials is increasing day by day. Magnesium alloy sheet and strip products can be mainly used in automobile "four doors and two covers", body panels, seat back panels, laptop shells, etc., and have very good application prospects and market. Continuous casting and rolling production of magnesium alloy coils is currently a high-end and efficient technology for the production of magnesium alloy sheet and strip products. The key component that determines the vertical plate forming and stable production of magnesium alloy casting and rolling is the casting roll. The cooling and forming of magnesium alloy molten metal and rolling are inseparable from the casting roll, especially for wide-width magnesium alloy casting and rolling.

[0004] Currently, wide-width magnesium alloy casting and rolling equipment is still relatively outdated, with narrow-strip casting and rolling production being the dominant technology on the market. Most magnesium alloy casting and rolling production lines are narrow strip lines of around 600mm, lacking specialized casting rolls for wide-width magnesium alloy production. This makes them unsuitable for producing magnesium alloy cast sheets and strips wider than 1200mm, and also presents challenges in achieving the required uniformity and efficient cooling in the width direction of the magnesium alloy sheet and strip. Utility Model Content

[0005] In view of the above problems, the purpose of this utility model is to provide a water-cooled casting roll to solve the problem that the existing technology lacks a water-cooled casting roll that can be used in production lines for wide magnesium alloy cast strips with a width of 1200mm or more. Existing magnesium alloy casting and rolling equipment is mainly used for narrow strip casting and rolling production. When used to produce wide magnesium alloys, the uniformity of the magnesium alloy strip in the width direction and the efficiency of cooling cannot meet the production requirements of wide magnesium alloys.

[0006] The water-cooled casting roll provided by this utility model

[0007] Includes a roller core, a water-cooled rotary joint, and a roller core rotation mounting mechanism; among which,

[0008] The roller core includes a roller body section, roller neck sections disposed at both ends of the roller body section, and roller core water inlet holes and roller core water return holes disposed inside the roller core along the length direction of the roller core; a stainless steel layer is embedded and welded on the outer side of the roller body section;

[0009] An annular water channel is provided on the outer periphery of the roller body section, and a partition is provided between adjacent annular water channels; an independent circulation system is provided for every two annular water channels; the independent circulation system includes at least three annular water channel return holes provided on the partition between the two annular water channels and at least three annular water channel inlet holes evenly distributed on the circumference of each annular water channel corresponding to the annular water channel return holes; the annular water channel return holes are connected to the roller core return holes; the annular water channel inlet holes are connected to the roller core inlet holes;

[0010] The water-cooled rotary joint is located at the end of the roller core, and inside the water-cooled rotary joint are a water inlet channel connected to the water inlet of the roller core and a water return channel connected to the water return of the roller core; the water-cooled rotary joint is connected to a workshop water-cooled circulation pipe.

[0011] The roller core rotation mounting mechanism is located in the roller neck section.

[0012] Furthermore, in a preferred embodiment, the number of the roller core return water hole is one, and it is located in the middle of the roller core; the number of the roller core water inlet hole and the number of the annular water channel water inlet hole are both three; on the same annular water channel, each annular water channel water inlet hole is connected to one roller core water inlet hole; the three roller core water inlets are evenly distributed on the outer periphery of the roller core return water hole.

[0013] Furthermore, in a preferred embodiment, the angle between the annular water channel inlet hole and the annular water channel return hole on the circumference of the roller core is 60°.

[0014] Furthermore, a preferred embodiment is that a roller sleeve is fitted around the outer periphery of the roller body section; the roller sleeve and the roller body section are in an interference fit.

[0015] Furthermore, a preferred embodiment is that a casting roll sealing cover is provided at the end of the roll body section and the roll sleeve; and a sealing structure is provided between the casting roll sealing cover, the roll body section and the roll sleeve.

[0016] Furthermore, a preferred embodiment is that the sealing structure is a heat-resistant double-lip seal.

[0017] Furthermore, a preferred embodiment is that the thickness of the stainless steel layer is greater than the depth of the annular waterway.

[0018] Furthermore, a preferred embodiment is to provide a WC-Co gradient transition layer on the outer side of the stainless steel layer.

[0019] Furthermore, in a preferred embodiment, the roller core rotation mounting mechanism includes a tapered roller bearing sleeved on the roller neck section, a bearing housing disposed outside the tapered roller bearing, and bearing housing end caps disposed at both ends of the bearing housing; a positioning retaining ring is provided between the outer end of the roller neck section and the bearing housing end cap.

[0020] Furthermore, a preferred embodiment is that the tapered roller bearings are arranged in at least four rows.

[0021] As can be seen from the above technical solution, the water-cooled casting roll provided by this utility model, by setting annular water channels on the outer circumference of the roll body, setting roll core water inlet holes and roll core water return holes inside the roll core, and setting an independent circulation system for every two annular water channels, and the independent circulation system includes at least three annular water return holes set on the partition between the two annular water channels and at least three annular water inlet holes evenly distributed on the circumference of each annular water channel corresponding to the annular water return holes, the annular water return holes are connected to the roll core water return holes; the annular water inlet holes are connected to the roll core water inlet holes, which can ensure that cooling water enters evenly from at least three points on the circumference of each annular water channel, so as to achieve high cooling uniformity and more efficient and rapid cooling. It can be applied to the production requirements of wide magnesium alloy cast strips and plates of 1200mm and above, making the wide magnesium alloy casting and rolling production process more stable and the plate erection process easier. This utility model has the advantages of reasonable cooling water flow distribution, high cooling efficiency, good cooling uniformity, ability to withstand large rolling forces, high plate shape control quality, and long service life. Attached Figure Description

[0022] Other objects and results of this invention will become clearer and easier to understand with reference to the following description taken in conjunction with the accompanying drawings, and with a more comprehensive understanding of the invention.

[0023] Figure 1 This is a schematic diagram of the structure of a water-cooled casting roll according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the roller core structure according to an embodiment of the present utility model;

[0025] Figure 3 This is a structural design drawing of the roller core inlet and outlet water holes and the annular water channel inlet and outlet water holes according to an embodiment of the present utility model;

[0026] Figure 4 This is another structural design drawing of the roller core inlet and outlet water holes and the annular water channel inlet and outlet water holes according to an embodiment of the present utility model;

[0027] Figure 5 This is another structural design drawing of the roller core inlet and outlet water holes and the annular water channel inlet and outlet water holes according to an embodiment of the present utility model;

[0028] Figure 6 This is a structural diagram of the annular waterway according to an embodiment of the present utility model;

[0029] Figure 7 This is a structural arrangement diagram of the annular water channel return hole and the annular water channel in the roller body section according to an embodiment of the present utility model;

[0030] Figure 8 This is a structural arrangement diagram of the annular water inlet hole and the annular water channel in the roller body section according to an embodiment of the present utility model;

[0031] Figure 9 This is a structural design drawing of the sealing structure and the stainless steel covering layer of the roller core according to an embodiment of the present utility model;

[0032] Figure 10 This is a simulation diagram of the flow field of the annular water channel of the water-cooled casting roll according to an embodiment of the present invention;

[0033] Figure 11 This is a simulation diagram of the water-cooled casting and rolling process according to an embodiment of the present invention.

[0034] In the attached diagram, 1-roll core, 11-roll body section, 12-roll neck section, 13-roll core water inlet hole, 14-roll core water return hole, 15-annular water channel, 16-partition, 17-annular water channel water inlet hole, 18-annular water channel water return hole, 2-water-cooled rotary joint, 31-tapered roller bearing, 32-bearing housing, 33-bearing housing end cover, 34-positioning retaining ring, 35-fixing round nut, 4-roll sleeve, 5-cast roll sealing cover, 6-sealing structure, 7-stainless steel covering layer, 8-WC-Co gradient transition layer.

[0035] In all the accompanying drawings, the same reference numerals indicate similar or corresponding features or functions. Detailed Implementation

[0036] In response to the aforementioned issue that there is a lack of water-cooled casting rolls suitable for production lines of magnesium alloy strips and plates with widths of 1200mm and above in the existing technology, and that existing magnesium alloy casting and rolling equipment is mainly used for narrow strip casting and rolling, the production of wide magnesium alloys suffers from problems such as the inability to meet the production requirements of wide magnesium alloy strips and plates in terms of uniformity in the width direction and efficient cooling, a water-cooled casting roll is proposed.

[0037] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0038] To illustrate the water-cooled casting roll provided by this utility model Figure 1 The structure of the water-cooled casting roll according to an embodiment of the present invention is shown; Figure 2 The roller core structure according to an embodiment of the present invention is shown; Figure 3The structural design of the roller core inlet and outlet water holes and the annular water channel inlet and outlet water holes according to an embodiment of the present invention is shown; Figure 4 This invention illustrates another structural design of the roller core inlet and outlet water holes and the annular water channel inlet and outlet water holes according to an embodiment of the present invention; Figure 5 This invention illustrates another structural design of the roller core inlet and outlet water holes and the annular water channel inlet and outlet water holes according to an embodiment of the present invention; Figure 6 An annular waterway structure according to an embodiment of the present invention is shown; Figure 7 The structural arrangement of the annular water channel return hole and the annular water channel in the roller body section according to an embodiment of the present invention is shown. Figure 8 The structural arrangement of the annular water inlet and the annular water channel in the roller body section according to an embodiment of the present invention is shown. Figure 9 The structural design of the sealing structure and the stainless steel covering layer of the roller core according to an embodiment of the present invention is shown; Figure 10 The flow field simulation of the annular water channel of the water-cooled casting roll according to an embodiment of the present invention is shown; Figure 11 A simulation of the water-cooled casting and rolling process according to an embodiment of the present invention is shown.

[0039] like Figures 1 to 11 As shown in the figure, the water-cooled casting roll provided by this utility model mainly includes a roll core 1, a water-cooled rotary joint 2, and a roll core rotation mounting mechanism; wherein,

[0040] The roller core 1 includes a roller body section 11, a roller neck section 12 disposed at both ends of the roller body section 11, and a roller core water inlet hole 13 and a roller core water return hole 14 disposed inside the roller core 1 along the length direction of the roller core 1.

[0041] An annular water channel 15 is provided on the outer periphery of the roller body section 11, and a partition 16 is provided between adjacent annular water channels 15; an independent circulation system is provided for every two annular water channels 15; the independent circulation system includes at least three annular water channel return holes 18 provided on the partition 16 between the two annular water channels 15 and at least three annular water channel inlet holes 17 evenly distributed on the circumference of each annular water channel 15 corresponding to the annular water channel return holes 18; the annular water channel return holes 18 are connected to the roller core return holes 14; the annular water channel inlet holes 17 are connected to the roller core inlet holes 13;

[0042] The water-cooled rotary joint 2 is located at the end of the roller core 1, and inside the water-cooled rotary joint 2 is a water inlet channel connected to the water inlet of the roller core water inlet hole 13 and a water return channel connected to the water return of the roller core water return hole 14; the water-cooled rotary joint 2 is connected to the workshop water-cooled circulation pipe.

[0043] The roller core rotation mounting mechanism is located in the roller neck section 12.

[0044] Specifically, the water-cooled rotary joint 2 is connected to the workshop's water-cooling circulation pipeline, allowing cooling water to circulate into the roll core 1. The water-cooled rotary joint 2 ensures stable rotation of the connection portion with the roll core 1 during the rotation of the water-cooled casting roll, and its connection portion with the cooling circulation pipeline is fixed. Preferably, the water-cooled rotary joint 2 employs a dynamic pressure balance interface design, connecting to the end face nozzle of the roll core 1 to optimize water flow stability during rotation and reduce turbulence losses. The water-cooled rotary joint 1 is preferably, but not limited to, connected to the end of the roll core 1 by bolts.

[0045] The annular water channels 15 are evenly arranged on the roller body section 11, and the spacing between each annular water channel 15 is the same. The roller core water inlet hole 13 and the roller core water return hole 14 are connected to the annular water channel 15 through the annular water channel water inlet hole 17 and the annular water channel water return hole 18 to form a complete cooling water channel.

[0046] The number of annular waterways 15 is several.

[0047] By setting an annular water channel 15 on the outer periphery of the roll body section 11, setting a roll core water inlet hole 13 and a roll core water return hole 14 inside the roll core 1, and setting an independent circulation system for every two annular water channels 15, and the independent circulation system includes at least three annular water return holes 18 set on the partition 16 between the two annular water channels 15 and at least three annular water inlet holes 17 evenly distributed on the circumference of each annular water channel 15 corresponding to the annular water return holes 18. The annular water return holes 18 are connected to the roll core water return holes 14; the annular water inlet holes 17 are connected to the roll core water inlet holes 13, which can ensure that cooling water enters evenly from at least three points on the circumference of each annular water channel 15, so that the cooling uniformity is high and the cooling is more efficient and rapid. It can be applied to the production requirements of wide magnesium alloy cast strips and plates with a width of 1200mm or more, making the wide magnesium alloy casting and rolling production process more stable and the plate erection process easier.

[0048] As a preferred embodiment of this utility model, the number of roller core return water holes 14 is one, and it is located in the middle of the roller core 1; the number of roller core water inlets 13 and annular water channel water inlets 17 are three; on the same annular water channel, each annular water channel water inlet 17 is connected to a roller core water inlet 13; the three roller core water inlets 13 are evenly distributed on the outer periphery of the roller core return water holes 14.

[0049] Specifically, such as Figures 3 to 5 As shown, a roller core return water hole 14 is provided at the center of the roller core 1 along its length. Three roller core inlet holes 13 are evenly arranged around the outer periphery of the roller core return water hole 14. On the roller body section 11, along the length of the roller body section 11, three annular water channel inlet holes 17 are evenly arranged in each annular water channel 15. Each annular water channel inlet hole 17 is connected to a roller core inlet hole 13, thereby dividing the annular water channel 15 into three cooling water inlet points to make its cooling more uniform.

[0050] It should be noted that the number of roller core return water holes 14, roller core inlet water holes 13, annular water channel inlet water holes 17, and annular water channel return water holes 18 can be set according to actual needs, and this utility model does not impose any special limitations on this.

[0051] The dimensions of the roller core water inlet hole 13 and the roller core water return hole 14 can be calculated according to the following formula:

[0052] Q=[q1(t1-t2)+q2(t2-t3)+q3]m;

[0053] Where Q is the total heat that needs to be removed per unit time, m is the casting and rolling output, t1 is the melt temperature, t2 is the melting point of magnesium alloy, t3 is the solid magnesium alloy strip temperature, q1 is the specific heat capacity of the melt, q2 is the specific heat capacity of the solid, and q3 is the latent heat of melting.

[0054]

[0055] Among them, China Q 水 t4 is the cooling water flow rate, t5 is the water temperature at the outlet of the casting roll, and q is the water temperature at the inlet of the casting roll. 水 This refers to the specific heat capacity of the cooling water.

[0056]

[0057] Where, d w Let V be the water inlet hole size (roller core water inlet hole 13 or roller core water return hole 14), V be the water flow velocity, and n be the number of water holes (roller core water inlet hole 13 or roller core water return hole 14). The dimensions of both the roller core water inlet hole 13 and the roller core water return hole 14 can be calculated using this formula. V can be determined empirically, and its validity can be verified through simulation. n is also temporarily determined. Then, the inlet and outlet hole dimensions are calculated.

[0058] As a preferred embodiment of this utility model, the angle between the annular water inlet hole 17 and the annular water return hole 18 on the circumference of the roller body of the roller core 1 is 60°.

[0059] Specifically, such as Figures 3 to 5 As shown, the roller core water inlet hole 13 and roller core water return hole 14 are arranged on the end face of the roller core 1 as three water inlets and one water return hole. The annular water channel water inlet hole 17 and annular water channel water return hole 18 are designed to be spaced 60° apart on the circumference of the roller body section 11, thereby achieving a temperature difference of ≤10℃ across the entire width of the magnesium alloy strip. The arrangement of the annular water channel water inlet hole 17 and annular water channel water return hole 18 within the roller core 1 mainly includes... Figure 3 , Figure 4 , Figure 5Three types. The annular water channel inlet holes 17 are distributed in three on each annular water channel 15, and the annular water channel return holes 18 are distributed in three at the intervals 16 between every two annular water channels 15. Every two annular water channels 15 form a small circulating water circuit, thereby improving cooling efficiency and reducing the temperature difference between the inlet and outlet water of the casting roll.

[0060] It should be noted that the internal orientation of roller core 1 includes, but is not limited to, Figures 3 to 5 The three schemes shown are designed for casting and rolling production of magnesium alloys with a width of 1200mm or more, thereby ensuring higher cooling efficiency and uniformity under wider widths, and meeting the requirements of higher rolling forces in wide-width magnesium alloy casting and rolling production.

[0061] As a preferred embodiment of the present invention, a roller sleeve 4 is provided on the outer periphery of the roller body section 11; the roller sleeve 4 and the roller body section 11 are in an interference fit.

[0062] As a preferred embodiment of this utility model, a casting roll sealing cover 5 is provided at the end of the roll body section 11 and the roll sleeve 4; a sealing structure 6 is provided between the casting roll sealing cover 5, the roll body section 11 and the roll sleeve 4.

[0063] As a preferred embodiment of this utility model, the sealing structure 6 is a heat-resistant double-lip seal structure; the sealing structure 6 is made of silicone rubber.

[0064] Specifically, the sealing structure 6 preferably adopts a uniquely designed double-lip seal to ensure the stability of the casting roll water system during operation. The sealing material of the sealing structure 6 is selected from materials with high heat resistance, such as silicone rubber, but not limited to silicone rubber. The casting roll sealing cover 5 fixes the sealing structure 6 between the roll core 1 and the roll sleeve 4.

[0065] As a preferred embodiment of this utility model, the thickness of the stainless steel covering layer 7 is greater than the depth of the annular waterway 15.

[0066] As a preferred embodiment of this utility model, a WC-Co gradient transition layer 8 is provided on the outer side of the stainless steel layer 7.

[0067] Specifically, the roll body section 11 is preferably designed to use stainless steel powder 3Cr13 embedded welding to form a stainless steel covering layer 7 of a certain thickness. On the outermost side of the roll core 1, a plasma sprayed WC-Co gradient transition layer 8 is used to balance the heat transfer efficiency and reduce the interface stress caused by the thermal expansion difference between the roll core 1 and the roll sleeve 4, thereby improving the strength and service life of the cast roll.

[0068] As a preferred embodiment of this utility model, the roller core rotation mounting mechanism includes a tapered roller bearing 31 sleeved on the roller neck section 12, a bearing seat 32 disposed outside the tapered roller bearing 31, and bearing seat end caps 33 disposed at both ends of the bearing seat 32; a positioning retaining ring 34 is provided between the outer end of the roller neck section 12 and the bearing seat end cap 33.

[0069] As a preferred embodiment of this utility model, the number of tapered roller bearings 31 is at least four rows.

[0070] Specifically, the roll neck section 12 is equipped with at least four rows of tapered roller bearings 31, bearing housings 32, bearing housing end caps 33, positioning retaining rings 34, and fixing round nuts 35. The at least four rows of tapered roller bearings 31 and bearing housings 32 transmit the rolling force during the casting and rolling process to the casting and rolling mill stand, making the operation more stable, extending the service life, and ensuring the consistency and better forming of the cast and rolled products.

[0071] It should be noted that the type of tapered roller bearing 31 is not limited to tapered roller bearings; the quantity is preferably, but not limited to, at least four rows, and can be one row, two rows, three rows, four rows, five rows, six rows, etc., and this utility model does not make any special limitation in this regard.

[0072] After the cooling water channel design of the roller core 1 was completed, finite element simulation was performed. The results showed that the overall flow field velocity was mainly between 1.2-3.2 m / s, which met the cooling field design requirements. The flow field exhibited no local dead zones during the wide-width magnesium alloy casting and rolling process, demonstrating good performance. Figure 10 As shown.

[0073] After the cooling roll design was completed, finite element simulation of the casting and rolling process was performed. The temperature change of the magnesium alloy molten metal in the casting and rolling area was stable, and the temperature at the casting and rolling exit was mainly 580-727K, which meets the exit strip temperature requirements for magnesium alloy casting and rolling production. This proves that the cooling system design of the casting roll for 1200mm wide magnesium alloy casting and rolling production meets the requirements. Figure 11 As shown.

[0074] As can be seen from the above specific embodiments, the water-cooled casting roll provided by this utility model, by setting an annular water channel on the outer circumference of the roll body, setting a roll core water inlet hole and a roll core water return hole inside the roll core, and setting an independent circulation system for every two annular water channels, and the independent circulation system includes at least three annular water channel water return holes set on the partition between the two annular water channels and at least three annular water channel water inlet holes evenly distributed on the circumference of each annular water channel corresponding to the annular water channel water return holes, and the annular water channel water return holes connected to the roll core water return holes; the annular water channel water inlet holes connected to the roll core water inlet holes, can ensure that cooling water enters evenly from at least three points on the circumference of each annular water channel, so that the cooling uniformity is high and the cooling is more efficient and rapid. It can be applied to the production requirements of wide magnesium alloy cast strips and plates of 1200mm and above, making the wide magnesium alloy casting and rolling production process more stable and the plate erection process easier. This invention has the advantages of reasonable cooling water flow distribution, high cooling efficiency, good cooling uniformity, ability to withstand large rolling forces, high plate shape control quality, and long service life.

[0075] The water-cooled casting roll according to the present invention has been described above by way of example with reference to the accompanying drawings. However, those skilled in the art should understand that various modifications can be made to the water-cooled casting roll proposed by the present invention without departing from the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the contents of the appended claims.

Claims

1. A water cooled casting roll characterized by, Includes a roller core, a water-cooled rotary joint, and a roller core rotation mounting mechanism; among which, The roller core includes a roller body section, roller neck sections disposed at both ends of the roller body section, and roller core water inlet holes and roller core water return holes disposed inside the roller core along the length direction of the roller core; a stainless steel layer is embedded and welded on the outer side of the roller body section; An annular water channel is provided on the outer periphery of the roller body section, and a partition is provided between adjacent annular water channels; an independent circulation system is provided for every two annular water channels; the independent circulation system includes at least three annular water channel return holes provided on the partition between the two annular water channels and at least three annular water channel inlet holes evenly distributed on the circumference of each annular water channel corresponding to the annular water channel return holes; the annular water channel return holes are connected to the roller core return holes; the annular water channel inlet holes are connected to the roller core inlet holes; The water-cooled rotary joint is located at the end of the roller core, and inside the water-cooled rotary joint are a water inlet channel connected to the water inlet of the roller core water inlet hole and a water return channel connected to the water return of the roller core water return hole; the water-cooled rotary joint is connected to a workshop water-cooled circulation pipe. The roller core rotation mounting mechanism is located in the roller neck section.

2. The water cooled cast roll according to claim 1, characterized in that, The roller core has one return water hole, which is located in the middle of the roller core; The number of water inlet holes in the roller core and the number of water inlet holes in the annular water channel are both three; On the same annular water channel, each annular water channel inlet hole is connected to one of the roller core inlet holes; The three roller core water inlet holes are evenly distributed on the outer periphery of the roller core water return hole.

3. The water-cooled casting roll according to claim 1, characterized in that, On the circumference of the roller core, the angle between the annular water inlet hole and the annular water return hole is 60°.

4. The water-cooled casting roll according to claim 1, characterized in that, A roller sleeve is fitted around the outer periphery of the roller body section; The roller sleeve and the roller body are in an interference fit.

5. The water-cooled casting roll according to claim 4, characterized in that, A casting roll sealing cover is provided at the end of the roll body section and the roll sleeve; A sealing structure is provided between the casting roll sealing cover, the roll body section and the roll sleeve.

6. The water-cooled casting roll according to claim 5, characterized in that, The sealing structure is a heat-resistant double-lip seal.

7. The water-cooled casting roll according to claim 1, characterized in that, The thickness of the stainless steel layer is greater than the depth of the annular waterway.

8. The water-cooled casting roll according to claim 1, characterized in that, A WC-Co gradient transition layer is provided on the outside of the stainless steel layer.

9. The water-cooled casting roll according to claim 1, characterized in that, The roller core rotation mounting mechanism includes a tapered roller bearing sleeved on the roller neck section, a bearing housing disposed outside the tapered roller bearing, and bearing housing end caps disposed at both ends of the bearing housing. A positioning retaining ring is provided between the outer end of the roller neck section and the bearing seat end cover.

10. The water-cooled casting roll according to claim 9, characterized in that, The number of tapered roller bearings is at least four rows.

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