Drive rolls for dry continuous casting

Abstract

This utility model discloses a drive roller for dry continuous casting, comprising: a drive roller body including a mandrel portion, a roller sleeve portion sleeved on the outer side of the mandrel portion, and a cooling inner channel provided inside the mandrel portion; a bearing support portion including a bearing seat body, one end of the bearing seat body being closed and the other end being fitted with a through cover, the bearing seat body and the through cover forming an integral structure; both the inner wall of one end of the bearing seat body and the inner wall of the through cover are provided with an all-metal sealing unit for sealing the mandrel portion; a cooling portion including a cooling water pipe, one end of the cooling inner channel being provided with a dual-path rotary joint, the dual-path rotary joint including a water inlet passage communicating with the cooling water pipe and a water return passage communicating with the cooling annulus; and a drive connection portion disposed at the end of the drive roller body. In this utility model, the bearing seat body and the through cover form an integral structure, effectively reducing the risk of impurities and high-temperature water vapor entering between the through cover and the bearing seat body; the use of an all-metal sealing unit ensures a long service life of the sealing structure.

Description

Technical Field

[0001] This utility model relates to the field of dry continuous casting technology, and in particular to a drive roller for dry continuous casting. Background Technology

[0002] In dry continuous casting, after the molten steel injected into the crystallizer is cooled into a relatively thin shell, it enters the casting flow guide section. At this time, because the thin high-temperature shell has a relatively low ability to resist mechanical stress and thermal stress, the service life requirements of the rollers in the casting flow guide section are very high.

[0003] Dry continuous casting differs from conventional continuous casting in that the conventional continuous casting process involves a long spray cooling zone for the billet, resulting in excellent cooling of the flow guide rollers and low roller temperatures, thus ensuring a sufficient service life for the continuous casting machine. In contrast, dry continuous casting involves a very short spray cooling zone for the billet, leading to poor cooling of the flow guide rollers and high roller temperatures. Furthermore, dry continuous casting rollers require heating to several hundred degrees Celsius during assembly. These two factors place higher demands on the sealing, temperature control, rigidity, and strength of dry continuous casting rollers.

[0004] Currently, the bearing housings used to mount the drive rollers in dry continuous casting machines employ a rubber + metal seal combination structure, with cooling water sprayed onto the bearing housings. However, the rubber seals cannot adequately adapt to high-temperature operating and assembly conditions. Due to space constraints, the strength and rigidity of the bearing housings are relatively low, failing to guarantee support stability. Furthermore, because the spray cooling zone is short, the current cooling structure provides ineffective cooling with the sprayed cooling water.

[0005] Therefore, based on years of experience and practice in related industries, the inventor proposes a drive roller for dry continuous casting to overcome the shortcomings of existing technologies. Utility Model Content

[0006] The purpose of this invention is to provide a drive roller for dry continuous casting, overcoming the problems of poor bearing housing sealing and poor cooling effect in the prior art. In this invention, the through cover is installed in the bearing housing body by embedding, and the bearing housing body and the through cover form an integral structure, effectively reducing the risk of impurities and high-temperature water vapor entering between the through cover and the bearing housing body; the use of an all-metal sealing unit can meet the requirements of high temperature resistance and corrosion resistance, ensuring a long service life of the sealing structure, and thus ensuring a long service life of the bearing support; the use of a high-flow dual-path rotary joint provides better cooling effect.

[0007] The purpose of this utility model is achieved as follows: a drive roller for dry continuous casting, comprising:

[0008] The drive roller body includes a mandrel section arranged in segments along the axial direction, a roller sleeve section sleeved on the outer side of the mandrel section, and a cooling inner channel through which each mandrel section is provided; a cooling outer channel is provided on the outer wall of each mandrel section.

[0009] The bearing support includes a bearing housing body sleeved on the outside of the spindle portion and spaced apart along the axial direction. One axial end of the bearing housing body is closed and a through cover is embedded at the other axial end of the bearing housing body. The bearing housing body and the through cover form an integral structure. An all-metal sealing unit for sealing the spindle portion is provided on the inner wall of one end of the bearing housing body and the inner wall of the through cover. A bearing sleeved on the spindle portion is internally sealed in the bearing housing body.

[0010] The cooling section includes a cooling water pipe passing through the inner cooling channel, and a cooling annulus is formed between the cooling water pipe and the inner cooling channel. The cooling annulus can be segmented and can communicate with the outer cooling channel. A dual-path rotary joint is provided at one end of the inner cooling channel. The dual-path rotary joint includes an inlet passage communicating with the cooling water pipe and a return passage communicating with the cooling annulus.

[0011] A drive connection part is disposed at the end of the drive roller body and connected to the drive device.

[0012] In a preferred embodiment of the present invention, the mandrel portion includes end mandrels disposed at both ends and a middle mandrel located between the end mandrels; the roller sleeve portion includes end roller sleeves and a middle roller sleeve, the end roller sleeves being sleeved on the outside of the end mandrels and the adjacent middle mandrels, and the middle roller sleeves being sleeved on the outside of two adjacent middle mandrels.

[0013] A central bearing support is provided between the end roller sleeve and the middle roller sleeve, and between two adjacent middle roller sleeves. An end bearing support is provided at the end of the end roller sleeve away from the middle roller sleeve. The bearing support includes the end bearing support and the middle bearing support.

[0014] In a preferred embodiment of this utility model, the first end of the end mandrel extends outward from the end roller sleeve, and the end bearing support includes a first bushing sleeved on the outer wall of the first end of the end mandrel. The axial ends of the first bushing sleeve abut against the end faces of the bearing and the end roller sleeve. The bearing seat body includes a first bearing seat body, and the all-metal sealing unit includes a first all-metal sealing unit. The outer side of the first bushing sleeve is sealed and fitted with the first bearing seat body, and the inner wall of the first bearing seat body is circumferentially fitted with the first all-metal sealing unit. The inner wall of the first all-metal sealing unit seals and fits against the outer wall of the first bushing sleeve.

[0015] In a preferred embodiment of this utility model, the drive connection part includes a spline flange sleeved on the first end of the end mandrel. The inner wall of the spline flange is provided with an inner spline. An outer retaining ring is provided at the end of the first end of the end mandrel. An inner retaining ring is provided on the side of the end mandrel located away from the bearing and away from the first bushing. The two ends of the spline flange abut against the outer retaining ring and the inner retaining ring, respectively. An outer spline is provided on the outer wall of the first end of the end mandrel. The outer spline and the inner spline form a spline transmission pair. The spline flange is circumferentially fixed to the end mandrel through the spline transmission pair. One end of the drive roller body is the driven end and the other end is the drive end. A fixed blind plate is connected to the spline flange located at the driven end. The spline flange located at the drive end is connected to the drive device.

[0016] In a preferred embodiment of the present invention, the through cover includes a first through cover, the all-metal sealing unit includes a second all-metal sealing unit, the first bearing seat body is embedded and connected to the first through cover at one end away from the end roller sleeve, the second all-metal sealing unit is arranged around the inner wall of the first through cover, and the inner wall of the second all-metal sealing unit is sealed and fitted to the outer wall of the inner retaining ring.

[0017] In a preferred embodiment of the present invention, the central bearing support includes a second bushing sleeved on the outer wall of the central spindle. The two axial ends of the second bushing abut against the adjacent end faces of the end roller sleeve and the adjacent central roller sleeve, or the two axial ends of the second bushing abut against the adjacent end faces of two adjacent central roller sleeves.

[0018] The bearing housing body includes a second bearing housing body, and the all-metal sealing unit includes a third all-metal sealing unit. The outer side of the second bushing is sealed with the second bearing housing body, and the inner wall of the second bearing housing body is circumferentially fitted with the third all-metal sealing unit. The inner wall of the third all-metal sealing unit is sealed and fitted to the outer wall of the second bushing.

[0019] The transparent cover includes a second transparent cover, and the all-metal sealing unit includes a fourth all-metal sealing unit. One end of the second bearing housing body is embedded and connected to the second transparent cover. The inner wall of the second transparent cover is surrounded by the fourth all-metal sealing unit, and the inner wall of the fourth all-metal sealing unit is sealed and fitted to the outer wall of the second bushing.

[0020] In a preferred embodiment of this utility model, a first mounting hole and a second mounting hole with an increased diameter are respectively provided at both ends of the cooling inner channel; the dual-path rotary joint is sealed and inserted into the first mounting hole, and the first mounting hole is connected to the return water passage; the water inlet passage is sealed and connected to one end of the cooling water pipe; a water plug is sealed and inserted into the second mounting hole, and a transition water outlet pipe is provided at the end of the water plug near the cooling water pipe, the transition water outlet pipe is sealed and connected to the cooling water pipe, and a cooling water through hole is provided on the side wall of the transition water outlet pipe, and the cooling water pipe is connected to the cooling annulus through the cooling water through hole and the second mounting hole.

[0021] In a preferred embodiment of this utility model, water rings are respectively provided on the end mandrel and the middle mandrel, and water seals are provided on both sides of the water rings.

[0022] In a preferred embodiment of this utility model, radial cooling holes are respectively provided on both sides of the water seal on the end mandrel and the middle mandrel, and the radial cooling holes are connected to the cooling outer channel on the outer wall of the mandrel portion.

[0023] In a preferred embodiment of this utility model, the all-metal sealing unit is made of stainless steel that can withstand temperatures above 500°C.

[0024] As described above, the drive roller for dry continuous casting of this utility model has the following beneficial effects:

[0025] In this invention, the through cover is embedded at one end of the bearing housing body, and the bearing housing body and the through cover form an integral structure, which can effectively increase the rigidity and strength of the bearing housing and improve its service life. The through cover is installed in the bearing housing body by embedding, and the position where the through cover mates with the bearing housing body can be covered by the bearing housing body, so that external media will not enter between the integrally formed bearing housing body and the through cover. During use, it can effectively reduce the risk of impurities and high-temperature moisture entering between the through cover and the bearing housing body, thereby avoiding corrosion of the structure near the bearing and affecting the sealing and lubrication effect, thus improving the reliability during use.

[0026] The bearing support's sealing structure employs an all-metal sealing unit, meeting the requirements for high temperature and corrosion resistance, ensuring a long service life for the sealing structure, and consequently, a longer service life for the bearing support itself. Compared to existing rubber seals, it has a smaller contact area with other mating components, reducing friction and significantly minimizing heat generation and wear. This all-metal sealing unit is ideal for high-temperature and friction-sensitive applications.

[0027] The dual-path rotary joint of this invention is a high-flow-rate joint with better cooling effect; the drive roller of this invention for dry continuous casting is adapted to the dry continuous casting production conditions and the high temperature in the bearing seat area during dry continuous casting roller assembly, resulting in a longer service life of the bearing support and thus a longer service life of the related bearings and casting flow guide rollers; and the manufacturing and maintenance costs of this invention are reduced. Attached Figure Description

[0028] The following figures are intended only to illustrate and explain the present invention and do not limit the scope of the present invention. Wherein:

[0029] Figure 1 This is a schematic diagram of the drive roller for dry continuous casting according to the present invention.

[0030] Figure 2 for Figure 1 Enlarged view of section I in the middle.

[0031] Figure 3 for Figure 1 Enlarged view of section II in the middle.

[0032] Figure 4 for Figure 1 Enlarged view of section III.

[0033] In the picture:

[0034] 1. Drive roller body;

[0035] 11. End mandrel; 12. Middle mandrel; 13. End roller sleeve; 14. Middle roller sleeve;

[0036] 2. Bearing support section;

[0037] 21. End bearing support; 211. First bushing; 212. First bearing housing body; 213. First all-metal sealing unit; 214. First cover; 215. Second all-metal sealing unit;

[0038] 22. Middle bearing support; 221. Second bushing; 222. Second bearing housing body; 223. Third all-metal sealing unit; 224. Second cover; 225. Fourth all-metal sealing unit;

[0039] 23. Bearings;

[0040] 3. Cooling section;

[0041] 30. Cooling inner channel; 301. First mounting hole; 302. Second mounting hole;

[0042] 31. Cooling water pipe; 311. First sealing element;

[0043] 32. External cooling channel;

[0044] 33. Dual-way rotary joint;

[0045] 34. Water plug; 341. Third sealing element;

[0046] 35. Transition water outlet pipe; 351. Cooling water through hole; 352. Second seal;

[0047] 361. First water ring; 362. Second water ring; 363. Third water ring; 364. Fourth water ring;

[0048] 371. First water seal; 372. Second water seal; 373. Third water seal; 374. Fourth water seal; 375. Fifth water seal; 376. Sixth water seal; 377. Seventh water seal; 378. Eighth water seal;

[0049] 38. Radial cooling holes;

[0050] 391. First bolt; 392. Second bolt;

[0051] 4. Drive connection part; 41. Spline flange; 42. Outer retaining ring; 43. Inner retaining ring; 44. Fixed blind flange; 45. Fasteners. Detailed Implementation

[0052] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described with reference to the accompanying drawings.

[0053] The specific embodiments of the present invention described herein are for illustrative purposes only and should not be construed as limiting the present invention in any way. Under the teachings of this invention, those skilled in the art can conceive of any possible modifications based on this invention, and these should all be considered within the scope of this invention. It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element. The terms "mounted," "connected," and "linked" should be interpreted broadly; for example, they can refer to mechanical or electrical connections, or internal connections between two elements, and can be direct or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0055] like Figures 1 to 4 As shown, this utility model provides a drive roller for dry continuous casting, comprising:

[0056] The drive roller body 1 includes a mandrel section arranged in segments along the axial direction, a roller sleeve section sleeved on the outside of the mandrel section, and an axially through cooling inner channel 30 arranged in the inner part of each mandrel section; the outer wall of each mandrel section is provided with a cooling outer channel 32 (the structure can adopt the existing cooling channel form of the drive roller).

[0057] The bearing support 2 includes a bearing housing body sleeved on the outside of the spindle and spaced apart along the axial direction. One axial end of the bearing housing body is closed and a through cover is embedded at the other axial end of the bearing housing body. The bearing housing body and the through cover form an integral structure. An all-metal sealing unit for sealing the spindle is provided on the inner wall of one end of the bearing housing body and the inner wall of the through cover. The bearing sleeved on the spindle is sealed inside the bearing housing body.

[0058] The cooling section 3 includes a cooling water pipe 31 that passes through the inner cooling channel 30. The cooling water pipe 31 and the inner cooling channel 30 form a cooling annulus. The cooling annulus can be segmented and can be connected to the outer cooling channel. A dual-path rotary joint 33 is provided at one end of the inner cooling channel 30. The dual-path rotary joint 33 includes an inlet passage connected to the cooling water pipe 31 and a return passage connected to the cooling annulus. The dual-path rotary joint 33 has a larger flow rate than a conventional water joint, which meets the cooling requirements of the drive roller body 1.

[0059] The drive connection part 4 is provided at the end of the drive roller body and is connected to the drive device (an existing drive device for drive rollers can be used).

[0060] In existing technologies, the cover is directly placed on the end face of the bearing housing body, which cannot form a good seal and poses a risk of impurities and moisture entering. In this invention, the cover is embedded in one end of the bearing housing body, forming an integral structure. This effectively increases the rigidity and strength of the bearing housing and extends its service life. The cover is installed in the bearing housing body by embedding, and the area where the cover mates with the bearing housing body is covered by the bearing housing body, preventing external media from entering between the integrally formed bearing housing body and the cover. During use, this effectively reduces the risk of impurities and high-temperature moisture entering between the cover and the bearing housing body, thereby avoiding corrosion of structures near the bearing, affecting the sealing and lubrication effects, and thus improving reliability during use.

[0061] The bearing support's sealing structure employs an all-metal sealing unit, meeting the requirements for high temperature and corrosion resistance, ensuring a long service life for the sealing structure, and consequently, a longer service life for the bearing support itself. Compared to existing rubber seals, the contact area with other mating components is smaller, reducing friction and significantly minimizing heat generation and wear. This all-metal sealing unit is ideal for high-temperature and friction-sensitive applications.

[0062] The dual-path rotary joint of this invention is a high-flow-rate joint with better cooling effect; the drive roller of this invention for dry continuous casting is adapted to the dry continuous casting production conditions and the high temperature in the bearing seat area during dry continuous casting roller assembly, resulting in a longer service life of the bearing support and thus a longer service life of the related bearings and casting flow guide rollers; and the manufacturing and maintenance costs of this invention are reduced.

[0063] Furthermore, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the mandrel section includes end mandrels 11 disposed at both ends and a middle mandrel 12 located between the end mandrels 11; the roller sleeve section includes end roller sleeves 13 and middle roller sleeves 14, the end roller sleeves 13 are sleeved on the outside of the end mandrels 11 and the adjacent middle mandrels 12, and the middle roller sleeves 14 are sleeved on the outside of two adjacent middle mandrels 12.

[0064] A middle bearing support 22 is provided between the end roller sleeve 13 and the middle roller sleeve 14, and between two adjacent middle roller sleeves 14. An end bearing support 21 is provided at the end of the end roller sleeve 13 away from the middle roller sleeve 14. The bearing support includes the end bearing support 21 and the middle bearing support 22.

[0065] Furthermore, such as Figure 1 , Figure 2 , Figure 4As shown, the first end of the end mandrel 11 protrudes out of the end roller sleeve 13. The end bearing support 21 includes a first bushing 211 sleeved on the outer wall of the first end of the end mandrel 11. The two axial ends of the first bushing 211 abut against the end faces of the bearing 23 and the end roller sleeve 13. The bearing housing body includes a first bearing housing body 212. The all-metal sealing unit includes a first all-metal sealing unit 213. The outer side of the first bushing 211 is sealed with the first bearing housing body 212. The inner wall of the first bearing housing body 212 is surrounded by the first all-metal sealing unit 213. The inner wall of the first all-metal sealing unit 213 seals against the outer wall of the first bushing 211.

[0066] Furthermore, such as Figure 1 , Figure 2 , Figure 4 As shown, the drive connection part 4 includes a spline flange 41 sleeved on the first end of the end spindle 11. The inner wall of the spline flange 41 is provided with an inner spline. An outer retaining ring 42 is provided at the end of the first end of the end spindle 11. An inner retaining ring 43 is provided on the side of the end spindle 11 away from the first bushing 211 of the bearing 23. The two ends of the spline flange 41 abut against the outer retaining ring 42 and the inner retaining ring 43, respectively. An outer spline is provided on the outer wall of the first end of the end spindle 11. The outer spline and the inner spline form a spline transmission pair. The spline flange 41 is circumferentially fixed to the end spindle 11 through the spline transmission pair. One end of the drive roller body is the driven end, and the other end is the driving end. A fixed blind plate 44 is connected to the spline flange 41 located at the driven end. In this embodiment, the fixed blind plate 44 is fixed by fasteners 45. The spline flange 41 located at the driving end is connected to the drive device. Specifically, the spline flange 41 at the driving end is directly connected to the drive shaft of the external drive device (connection method is the same as in the prior art).

[0067] Furthermore, such as Figure 1 , Figure 2 As shown, the through cover includes a first through cover 214, and the all-metal sealing unit includes a second all-metal sealing unit 215. The first bearing housing body 212 is embedded and connected to the first through cover 214 at one end away from the end roller sleeve 13. The second all-metal sealing unit 215 is arranged around the inner wall of the first through cover 214, and the inner wall of the second all-metal sealing unit 215 seals against the outer wall of the inner retaining ring 43.

[0068] The number of the first all-metal sealing unit 213 and the second all-metal sealing unit 215 is greater than or equal to 2. The combination of 2 first all-metal sealing units 213 or second all-metal sealing units 215 forms a multi-maze structure, which has a special sealing effect on grease lubrication and can also prevent dirt, dust and other forms of impurities from entering.

[0069] Furthermore, such as Figure 1 , Figure 3As shown, the middle bearing support 22 includes a second bushing 221 sleeved on the outer wall of the middle spindle 12. The two axial ends of the second bushing 221 abut against the adjacent end faces of the end roller sleeve 13 and the adjacent middle roller sleeve 14, or the two axial ends of the second bushing 221 abut against the adjacent end faces of two adjacent middle roller sleeves 14.

[0070] The bearing housing body includes a second bearing housing body 222, and the all-metal sealing unit includes a third all-metal sealing unit 223. The outer side of the second bushing 221 is sealed with the second bearing housing body 222, and the inner wall of the second bearing housing body 222 is surrounded by the third all-metal sealing unit 223. The inner wall of the third all-metal sealing unit 223 is sealed and fitted to the outer wall of the second bushing 221.

[0071] The cover includes a second cover 224, and the all-metal sealing unit includes a fourth all-metal sealing unit 225. One end of the second bearing housing body 222 is embedded and connected to the second cover 224. The inner wall of the second cover 224 is surrounded by the fourth all-metal sealing unit 225, and the inner wall of the fourth all-metal sealing unit 225 is sealed and fitted to the outer wall of the second bushing 221.

[0072] The number of the third all-metal sealing unit 223 and the fourth all-metal sealing unit 225 is greater than or equal to 2. The combination of 2 third all-metal sealing units 223 or fourth all-metal sealing units 225 forms a multi-labyrinth structure, which has a special sealing effect on grease lubrication and can also prevent dirt, dust and other forms of impurities from entering.

[0073] Furthermore, such as Figure 1 , Figure 2 , Figure 4 As shown, the cooling inner channel 30 has a first mounting hole 301 and a second mounting hole 302 with increased diameter at both ends; the dual-path rotary joint 33 is sealed and inserted into the first mounting hole 301, which is connected to the return water passage; the water inlet passage is sealed and connected to one end of the cooling water pipe 31; a water plug 34 is sealed and inserted into the second mounting hole 302, and a transition water outlet pipe 35 is extended from the end of the water plug 34 near the cooling water pipe 31. The transition water outlet pipe 35 is sealed and connected to the cooling water pipe 31, and a cooling water through hole 351 is provided on the side wall of the transition water outlet pipe 35. The cooling water pipe 31 is connected to the cooling annulus through the cooling water through hole 351 and the second mounting hole 302.

[0074] Furthermore, water rings are respectively provided on the end mandrel 11 and the middle mandrel 12, and water seals are provided on both sides of the water rings.

[0075] Furthermore, such as Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, radial cooling holes 38 are respectively provided on both sides of the water seal on the end mandrel 11 and the middle mandrel 12. The radial cooling holes 38 are connected to the cooling outer channel 32 on the outer wall of the mandrel part.

[0076] Furthermore, the all-metal sealing unit is made of stainless steel that can withstand temperatures above 500°C.

[0077] In other words, the all-metal sealing unit can be made of high-temperature and corrosion-resistant materials. For example, it can be made of stainless steel with a temperature resistance of over 500°C, ensuring a long service life due to its strong corrosion resistance and stable performance under high-temperature conditions, thus guaranteeing a longer service life for the bearing support. Furthermore, compared to existing rubber seals, this all-metal sealing unit has a smaller contact area with other mating components, reducing friction and significantly minimizing heat generation and wear. All-metal sealing units are ideal for high-temperature and friction-sensitive applications. In addition, the combination of two all-metal sealing units forms a multi-layered labyrinth structure, providing a special sealing effect for grease lubrication and preventing the intrusion of dirt, dust, and other impurities.

[0078] Example 1

[0079] like Figure 1 As shown, the drive roller body 1 is composed of 4 segmented rollers, namely 2 end mandrels 11 and 2 middle mandrels 12; a water ring is respectively set on the end mandrel 11 or the middle mandrel 12 inside each end roller sleeve 13 and the middle roller sleeve 14, which are respectively set as the first water ring 361, the second water ring 362, the third water ring 363, and the fourth water ring 364. Water seals are respectively set on both sides of each water ring, which are respectively set as the first water seal 371, the second water seal 372, the third water seal 373, the fourth water seal 374, the fifth water seal 375, the sixth water seal 376, the seventh water seal 377, and the eighth water seal 378.

[0080] The dual-path rotary joint 33 is fixedly connected to the driven end spindle 11 (left side of the figure) by the first bolt 391; the water inlet passage of the dual-path rotary joint 33 is sealed to the cooling water pipe 31 by the first seal 311, the cooling water pipe 31 is sealed to the transition water outlet pipe 35 by the second seal 352, the water plug 34 is sealed to the second mounting hole 302 by the third seal 341, and the water plug 34 is fixedly connected to the driven end spindle 11 (right side of the figure) by the second bolt 392.

[0081] Cooling water enters the cooling water pipe 31 through the inlet passage of the dual-path rotary joint 33, then enters the transition outlet pipe 35, and enters the cooling annulus through the cooling water through hole 351 and the second mounting hole 302. Cooling water enters the cooling outer channel 32 through the radial cooling hole 38 between the eighth water seal 378 and the second mounting hole 302 to cool the drive roller body 1; this part of the cooling water travels forward through the fourth water ring 364, the cooling outer channel 32, and the radial cooling hole 38 located on the side of the seventh water seal 377 away from the fourth water ring 364 to enter the cooling annulus. Under the blocking effect of the sixth water seal 376, the cooling water then enters the cooling outer channel 32 through the radial cooling hole 38 close to the sixth water seal 376, and so on. The cooling water returns and is discharged through the cooling annulus of the driven end, the first mounting hole 301, and the return passage of the dual-path rotary joint 33.

[0082] As described above, the drive roller for dry continuous casting of this utility model has the following beneficial effects:

[0083] In this invention, the through cover is embedded at one end of the bearing housing body, and the bearing housing body and the through cover form an integral structure, which can effectively increase the rigidity and strength of the bearing housing and improve its service life. The through cover is installed in the bearing housing body by embedding, and the position where the through cover mates with the bearing housing body can be covered by the bearing housing body, so that external media will not enter between the integrally formed bearing housing body and the through cover. During use, it can effectively reduce the risk of impurities and high-temperature moisture entering between the through cover and the bearing housing body, thereby avoiding corrosion of the structure near the bearing and affecting the sealing and lubrication effect, thus improving the reliability during use.

[0084] The bearing support's sealing structure employs an all-metal sealing unit, meeting the requirements for high temperature and corrosion resistance, ensuring a long service life for the sealing structure, and consequently, a longer service life for the bearing support itself. Compared to existing rubber seals, the contact area with other mating components is smaller, reducing friction and significantly minimizing heat generation and wear. This all-metal sealing unit is ideal for high-temperature and friction-sensitive applications.

[0085] The dual-path rotary joint of this invention is a high-flow-rate joint with better cooling effect; the drive roller of this invention for dry continuous casting is adapted to the dry continuous casting production conditions and the high temperature in the bearing seat area during dry continuous casting roller assembly, resulting in a longer service life of the bearing support and thus a longer service life of the related bearings and casting flow guide rollers; and the manufacturing and maintenance costs of this invention are reduced.

[0086] The above description is merely an illustrative embodiment of this utility model and is not intended to limit the scope of this utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model.

Claims

1. A drive roll for dry continuous casting, characterized in that, include: The drive roller body includes a mandrel section arranged in segments along the axial direction, a roller sleeve section sleeved on the outer side of the mandrel section, and a cooling inner channel through which each mandrel section is provided; a cooling outer channel is provided on the outer wall of each mandrel section. The bearing support includes a bearing housing body sleeved on the outside of the spindle portion and spaced apart along the axial direction. One axial end of the bearing housing body is closed and a through cover is embedded at the other axial end of the bearing housing body. The bearing housing body and the through cover form an integral structure. An all-metal sealing unit for sealing the spindle portion is provided on the inner wall of one end of the bearing housing body and the inner wall of the through cover. A bearing sleeved on the spindle portion is internally sealed in the bearing housing body. The cooling section includes a cooling water pipe passing through the inner cooling channel, and a cooling annulus is formed between the cooling water pipe and the inner cooling channel. The cooling annulus can be segmented and sealed, and can communicate with the outer cooling channel. A dual-path rotary joint is provided at one end of the inner cooling channel. The dual-path rotary joint includes an inlet passage communicating with the cooling water pipe and a return passage communicating with the cooling annulus. The end of the cooling water pipe away from the dual-path rotary joint is connected to the cooling annulus. A drive connection part is disposed at the end of the drive roller body and connected to the drive device.

2. The drive roll for dry continuous casting as described in claim 1, characterized in that, The mandrel portion includes end mandrels disposed at both ends and a middle mandrel located between the end mandrels; the roller sleeve portion includes end roller sleeves and a middle roller sleeve, the end roller sleeves being sleeved on the outside of the end mandrels and the adjacent middle mandrels, and the middle roller sleeves being sleeved on the outside of two adjacent middle mandrels; A central bearing support is provided between the end roller sleeve and the middle roller sleeve, and between two adjacent middle roller sleeves. An end bearing support is provided at the end of the end roller sleeve away from the middle roller sleeve. The bearing support includes the end bearing support and the middle bearing support.

3. The drive roll for dry continuous casting as described in claim 2, characterized in that, The first end of the end mandrel extends out of the end roller sleeve. The end bearing support includes a first bushing sleeved on the outer wall of the first end of the end mandrel. The two axial ends of the first bushing sleeve abut against the end faces of the bearing and the end roller sleeve. The bearing housing body includes a first bearing housing body. The all-metal sealing unit includes a first all-metal sealing unit. The outer side of the first bushing sleeve is sealed and fitted with the first bearing housing body. The inner wall of the first bearing housing body is surrounded by the first all-metal sealing unit. The inner wall of the first all-metal sealing unit seals and fits against the outer wall of the first bushing sleeve.

4. The drive roll for dry continuous casting as described in claim 3, characterized in that, The drive connection includes a spline flange sleeved on the first end of the end mandrel. The inner wall of the spline flange is provided with an inner spline. An outer retaining ring is provided at the end of the first end of the end mandrel. An inner retaining ring is provided on the side of the end mandrel away from the bearing and the first bushing. The two ends of the spline flange abut against the outer retaining ring and the inner retaining ring, respectively. An outer spline is provided on the outer wall of the first end of the end mandrel. The outer spline and the inner spline form a spline transmission pair. The spline flange is circumferentially fixed to the end mandrel through the spline transmission pair. One end of the drive roller body is the driven end and the other end is the driving end. A fixed blind plate is connected to the spline flange located at the driven end. The spline flange located at the driving end is connected to the drive device.

5. The drive roll for dry continuous casting as described in claim 4, characterized in that, The transparent cover includes a first transparent cover, and the all-metal sealing unit includes a second all-metal sealing unit. The first bearing housing body is embedded and connected to the first transparent cover at one end away from the end roller sleeve. The second all-metal sealing unit is arranged around the inner wall of the first transparent cover, and the inner wall of the second all-metal sealing unit is sealed and fitted to the outer wall of the inner retaining ring.

6. The drive roll for dry continuous casting as described in claim 2, characterized in that, The central bearing support includes a second bushing sleeved on the outer wall of the central spindle. The two axial ends of the second bushing abut against the adjacent end faces of the end roller sleeve and the adjacent central roller sleeve, or the two axial ends of the second bushing abut against the adjacent end faces of two adjacent central roller sleeves. The bearing housing body includes a second bearing housing body, and the all-metal sealing unit includes a third all-metal sealing unit. The outer side of the second bushing is sealed with the second bearing housing body, and the inner wall of the second bearing housing body is circumferentially fitted with the third all-metal sealing unit. The inner wall of the third all-metal sealing unit is sealed and fitted to the outer wall of the second bushing. The transparent cover includes a second transparent cover, and the all-metal sealing unit includes a fourth all-metal sealing unit. One end of the second bearing housing body is embedded and connected to the second transparent cover. The inner wall of the second transparent cover is surrounded by the fourth all-metal sealing unit, and the inner wall of the fourth all-metal sealing unit is sealed and fitted to the outer wall of the second bushing.

7. The drive roll for dry continuous casting as described in claim 2, characterized in that, The cooling inner channel has a first mounting hole and a second mounting hole with an increased diameter at both ends; the dual-path rotary joint is sealed and inserted into the first mounting hole, which is connected to the return water passage; the water inlet passage is sealed and connected to one end of the cooling water pipe; a water plug is sealed and inserted into the second mounting hole, and a transition water outlet pipe is extended from the end of the water plug near the cooling water pipe. The transition water outlet pipe is sealed and connected to the cooling water pipe, and a cooling water through hole is provided on the side wall of the transition water outlet pipe. The cooling water pipe is connected to the cooling annulus through the cooling water through hole and the second mounting hole.

8. The drive roll for dry continuous casting as described in claim 7, characterized in that, Water rings are respectively provided on the end mandrel and the middle mandrel, and water seals are provided on both sides of the water rings.

9. The drive roll for dry continuous casting as described in claim 8, characterized in that, Radial cooling holes are respectively provided on both sides of the water seal on the end mandrel and the middle mandrel, and the radial cooling holes are connected to the cooling outer channel on the outer wall of the mandrel portion.

10. The drive roll for dry continuous casting as described in claim 1, characterized in that, The all-metal sealing unit is made of stainless steel that can withstand temperatures above 500°C.

Images