Casting machine roller

Abstract

The embodiment of the application provides a continuous casting machine roller, which comprises a roller, a rotary joint and a support arranged at both ends of the roller, a cooling water channel is arranged in the middle of the roller, the rotary joint comprises a shell, a first bearing and a first rotating shaft, a first mounting cavity is arranged in the shell, an outer ring of the first bearing is fixed in the first mounting cavity, an inner ring of the first bearing is sleeved on the first rotating shaft, and the material of the first bearing is graphite; a water passing hole is arranged on the shell, a communication hole capable of communicating the water passing hole with the cooling water channel is arranged in the first rotating shaft; the support comprises a bearing seat and a second bearing, an outer ring of the second bearing is fixed on the bearing seat, and an inner ring of the second bearing is connected to the end of the roller. In the application, the material of the first bearing is selected as graphite, the cooling effect of the cooling water is matched, the damage of high temperature to the bearing is reduced, and therefore the failure rate is reduced.

Description

Technical Field

[0001] This invention relates to the field of metallurgical equipment, and more specifically, to a continuous casting machine roller. Background Technology

[0002] Molten steel forms a red billet in the crystallizer, undergoes secondary cooling, and is then conveyed by fixed-section rollers to the straightening machine for straightening, ultimately forming a straight steel billet. Therefore, the fixed section plays a crucial role in the overall casting line. With the increase in special steel production capacity and the accelerated production pace of the No. 7 large billet continuous casting machine, the failure rate of the fixed section has increased. Rollers frequently jam and fail to rotate, severely affecting billet quality. Furthermore, online maintenance is difficult, often forcing casting shutdowns and disrupting production. To meet production demands, the urgent task is to reduce the failure rate of the fixed section and ensure stable, reliable, and efficient equipment operation.

[0003] Therefore, this application is hereby submitted. Summary of the Invention

[0004] The objectives of this invention include, for example, providing a continuous casting machine roller that can reduce the roller failure rate and improve the stability and reliability of equipment operation.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] In a first aspect, the present invention provides a continuous casting machine roller, comprising a roller, a rotary joint, and support members disposed at both ends of the roller.

[0007] The roller has a cooling water channel in the middle. The rotary joint includes a housing, a first bearing, and a first rotating shaft. The housing has a first mounting cavity inside. The outer ring of the first bearing is fixed in the first mounting cavity. The inner ring of the first bearing is sleeved on the first rotating shaft. The first bearing is made of graphite. The housing has a water passage hole. The first rotating shaft has a connecting hole inside that connects the water passage hole to the cooling water channel.

[0008] The support includes a bearing housing and a second bearing. The outer ring of the second bearing is fixed on the bearing housing, and the inner ring of the second bearing is connected to the end of the roller.

[0009] In some embodiments, a first limiting platform and a first limiting groove are coaxially arranged on the inner wall of the first mounting cavity with the rotating shaft. The first limiting platform and the first limiting groove are respectively located on both sides of the outer ring of the first bearing. A first shaft clip capable of pressing the outer ring of the first bearing against the first limiting platform is provided in the first limiting groove.

[0010] In some embodiments, the outer surface of the first rotating shaft is provided with an annular second limiting platform and a second limiting groove, the second limiting platform and the second limiting groove are respectively located on both sides of the inner ring of the first bearing, and a second shaft clip is provided in the second limiting groove to press the inner ring of the first bearing against the second limiting platform; a washer is also provided between the second shaft clip and the inner ring of the first bearing, and the washer is sleeved on the first rotating shaft.

[0011] In some embodiments, a connecting shaft is further provided at the end of the first rotating shaft away from the roller. An annular third limiting platform is provided on the outer surface of the connecting rotating shaft, and an annular fourth limiting platform is further provided in the first mounting cavity. The inner diameter of the fourth limiting platform is adapted to the outer diameter of the connecting rotating shaft. An elastic member is provided between the fourth limiting platform and the third limiting platform for pushing the third limiting platform toward the first rotating shaft so that the connecting rotating shaft abuts against the end of the first rotating shaft.

[0012] A sealing ring is provided between the connecting shaft and the fourth limiting platform shown;

[0013] A sealing ring is provided between the connecting shaft and the first shaft.

[0014] In some embodiments, a blind hole is provided on the fourth limiting platform, the axis of the blind hole is arranged in the same direction as the axis of the first rotating shaft, an elastic element is provided in the blind hole, and one end of the elastic element extending out of the blind hole abuts against the third limiting platform.

[0015] In some embodiments, the bearing housing is provided with a second mounting cavity, and an annular fifth limiting platform is provided in the second mounting cavity. A flange is provided on the side of the second mounting cavity away from the roller, which is capable of pressing the outer ring of the second bearing against the fifth limiting platform. The flange is sleeved on the end of the roller and fixed to the bearing housing.

[0016] A spacer ring is provided between the fifth limiting platform and the outer ring of the second bearing;

[0017] A spacer ring is provided between the flange and the outer ring of the second bearing.

[0018] In some embodiments, an annular sixth limiting platform and an annular sixth limiting groove are provided on the outer wall of the roller end. The sixth limiting platform and the sixth limiting groove are respectively located on both sides of the inner ring of the second bearing. A retaining ring capable of pressing the inner ring of the second bearing against the sixth limiting platform is provided in the sixth limiting groove.

[0019] In some embodiments, a lubricating oil inlet is further included, the lubricating oil inlet being located on a bearing seat between the second bearing and the spacer ring, and an oil seal is provided on the side of the second bearing near the roller; a sealing ring is provided between the flange and the end of the roller.

[0020] In some embodiments, the lubricating oil inlet is located below the second bearing, and the angle between the line connecting the lubricating oil inlet and the center of the second bearing and the vertical direction is 50°-60°.

[0021] In some embodiments, a spray cooling device is provided above the roller, the spray cooling device includes a nozzle, the spray holes of the nozzle are inclined downward and the angle with the vertical direction is 35°-40°; the nozzle is provided with a pressure monitoring device and a flow control device, the pressure monitoring device and the flow control device are signal connected.

[0022] The beneficial effects of the embodiments of the present invention include, for example:

[0023] High temperatures are currently the main cause of failures in the fixed section of large billet continuous casting machines. Under high temperatures, the first bearing inside the rotary joint is prone to damage, and it may jam and become unable to rotate after approximately 30° of rotation, thus affecting the normal operation of the rollers and causing failure. In this embodiment, the first bearing is made of graphite, and with the cooling effect of cooling water, the damage to the bearing caused by high temperatures is reduced, thereby lowering the failure rate. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of the rollers in a continuous casting machine.

[0026] Figure 2 This is a partial schematic diagram of the connection between the rotary joint and the roller;

[0027] Figure 3 This is a schematic diagram of the structure at the connection between the rotary joint and the roller;

[0028] Figure 4 This is a schematic diagram of the rotary joint.

[0029] Icons: 1-Rotary joint; 2-Protective cover; 6-Flange; 7-Spacer ring; 8-Second bearing; 9-Roller; 11-Bearing housing; 12-Retaining ring; 13-Sealing ring; 10-Oil seal; 3-Cooling water channel; 4-Fifth limiting platform; 5-Sixth limiting platform; 101-Housing; 102-First bearing; 103-First rotating shaft; 104-Connecting rotating shaft; 105-Elastic element; 106-Sealing ring; 107-Washer; 108-Water passage hole; 109-Connecting hole; 110-First limiting platform; 111-First shaft clamp; 112-Second limiting platform; 113-Second shaft clamp; 114-Third limiting platform; 115-Fourth limiting platform. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0034] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0035] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0036] Please refer to Figures 1 to 4This embodiment provides a continuous casting machine roller 9, including roller 9, rotary joint 1, and support members disposed at both ends of roller 9.

[0037] The roller 9 has a cooling water channel 3 in the middle. The rotary joint 1 includes a housing 101, a first bearing 102, and a first rotating shaft. The housing 101 has a first mounting cavity inside. The outer ring of the first bearing 102 is fixed in the first mounting cavity, and the inner ring of the first bearing 102 is sleeved on the first rotating shaft. The first bearing 102 is made of graphite. The housing 101 has a water passage hole 108, and the first rotating shaft has a connecting hole 109 inside that connects the water passage hole 108 to the cooling water channel 3.

[0038] The support includes a bearing housing 11 and a second bearing 8. The outer ring of the second bearing 8 is fixed on the bearing housing 11, and the inner ring of the second bearing 8 is connected to the end of the roller 9.

[0039] In this embodiment, when the roller 9 is working, the water inlet 108 at one end of the roller 9 serves as the water inlet, and the water outlet at the other end serves as the water outlet, so that cooling water enters the cooling water channel 3 from one end of the roller 9 and leaves from the water outlet at the other end, thereby cooling the roller 9. In this embodiment, the connection between the roller 9 and the rotating shaft of the rotary joint 1 can refer to the prior art, which will not be elaborated here. A protective cover 2 can be provided on the outside of the rotary joint 1.

[0040] High temperatures are currently the main cause of failures in the fixed section of large billet continuous casting machines. Under high temperatures, the first bearing 102 inside the rotary joint 1 is prone to damage, and it will jam and become unable to rotate after rotating at around 30°, thus affecting the normal operation of the roller 9 and causing failure. In this embodiment, the first bearing 102 is made of graphite, and with the cooling effect of cooling water, the damage to the bearing caused by high temperatures is reduced, thereby reducing the failure rate. Specifically, the bearing in this embodiment can be an oil-free sliding bearing.

[0041] In some embodiments, a first limiting platform 110 and a first limiting groove are coaxially disposed on the inner wall of the first mounting cavity with the rotating shaft. The first limiting platform 110 and the first limiting groove are respectively located on both sides of the outer ring of the first bearing 102. A first shaft clip is disposed in the first limiting groove to press the outer ring of the first bearing 102 against the first limiting platform 110. In this embodiment, the outer ring of the bearing is limited by the first limiting platform 110 and the first shaft clip 111.

[0042] In some embodiments, the outer surface of the first rotating shaft 103 is provided with an annular second limiting platform 112 and a second limiting groove. The second limiting platform 112 and the second limiting groove are respectively located on both sides of the inner ring of the first bearing 102. A second shaft clip 113 is provided in the second limiting groove to press the inner ring of the first bearing 102 against the second limiting platform 112. A washer 107 is also provided between the second shaft clip 113 and the inner ring of the first bearing 102, and the washer 107 is sleeved on the first rotating shaft 103. In this embodiment, the inner ring of the bearing is limited by the second limiting platform 112 and the second shaft clip 113.

[0043] In some embodiments, a connecting shaft 104 is further provided at the end of the first rotating shaft 103 away from the roller 9. An annular third limiting platform 114 is provided on the outer surface of the connecting shaft 104, and an annular fourth limiting platform 115 is further provided in the first mounting cavity. The inner diameter of the fourth limiting platform 115 is adapted to the outer diameter of the connecting shaft 104. An elastic member 105 is provided between the fourth limiting platform 115 and the third limiting platform 114 for pushing the third limiting platform 114 toward the first rotating shaft 103 so that the connecting shaft 104 abuts against the end of the first rotating shaft 103.

[0044] A sealing ring 13 is provided between the connecting shaft 104 and the fourth limiting platform 115 shown;

[0045] A sealing ring 106 is provided between the connecting shaft 104 and the first shaft 103.

[0046] In this embodiment, the connecting shaft 104 is pressed against the first shaft 103 by the elastic element 105, and a sealing ring 106 is used to seal the connection shaft 104 and the first shaft 103. A sealing ring 13 is used to seal the connection shaft 104 and the housing 101, thereby reducing cooling water leakage and loss. The elastic element 105 in this embodiment can be a high-temperature resistant elastic ring, or a spring or other mechanical structure can provide elasticity. Through improvements to the bearings and in conjunction with the connecting shaft 104, the annual failure rate of the rotary joint 1 can be reduced from 180 times to 10 times.

[0047] In some embodiments, the fourth limiting platform 115 is provided with a blind hole, the axis of the blind hole is arranged in the same direction as the axis of the first rotating shaft 103, and an elastic element 105 is provided in the blind hole, with one end of the elastic element 105 extending out of the blind hole abutting against the third limiting platform 114.

[0048] In this embodiment, the elastic element 105 may include a pin and a spring sleeved on the pin. Specifically, the fourth limiting platform 115 may be provided with a plurality of blind holes, which are evenly distributed around the connecting shaft 104. The type of elastic element 105 may be selected by those skilled in the art according to the actual required elastic force.

[0049] In some embodiments, the bearing housing 11 is provided with a second mounting cavity, and an annular fifth limiting platform 4 is provided in the second mounting cavity. A flange 6 is provided on the side of the second mounting cavity away from the roller 9, which can press the outer ring of the second bearing 8 against the fifth limiting platform 4. The flange 6 is sleeved on the end of the roller 9 and fixed on the bearing housing 11.

[0050] A spacer ring 7 is provided between the fifth limiting platform 4 and the outer ring of the second bearing 8;

[0051] A spacer ring 7 is provided between the flange 6 and the outer ring of the second bearing 8.

[0052] In this embodiment, flange 6 and fifth limiting platform 4 are used to fix the outer ring of the second bearing 8. Flange 6 can be fixed to the bearing seat 11 by countersunk screws and washers. Of course, other existing fixing methods can also be selected for countersunk screws and washers.

[0053] In some embodiments, an annular sixth limiting platform 5 and an annular sixth limiting groove are provided on the outer wall of the end of the roller 9. The sixth limiting platform 5 and the sixth limiting groove are respectively located on both sides of the inner ring of the second bearing 8. A retaining ring 12 capable of pressing the inner ring of the second bearing 8 against the sixth limiting platform 5 is provided in the sixth limiting groove.

[0054] In some embodiments, a lubricating oil inlet is also included, which is located on a bearing seat between the second bearing 8 and the spacer ring, and an oil seal 10 is provided on the side of the second bearing 8 near the roller 9; a sealing ring 13 is provided between the flange 6 and the end of the roller 9.

[0055] In this embodiment, lubricating oil enters the second bearing 8 to lubricate it. At the same time, the oil seal 10 and sealing ring 13 reduce the loss of lubricating oil. In this embodiment, the sealing ring 13 can be a rotary lip sealing ring 13.

[0056] In some embodiments, the lubricating oil inlet is located below the second bearing 8, and the angle between the line connecting the lubricating oil inlet and the center of the second bearing 8 and the vertical direction is 50°-60°.

[0057] Practice has shown that when the lubricating oil inlet is located below the second bearing 8 and offset to both sides by 50°-60°, the equipment failure rate is the lowest, with only 0-1 failures per year; when the lubricating oil inlet is located directly below the second bearing 8, the equipment failure rate increases; when the lubricating oil inlet is located directly above the second bearing 8, the failure rate increases significantly, reaching 30 failures per year.

[0058] In some embodiments, a spray cooling device is provided above the roller 9. The spray cooling device includes a nozzle, the spray holes of which are inclined downward and form an angle of 35°-40° with the vertical direction. A pressure monitoring device and a flow control device are provided on the nozzle, and the pressure monitoring device and the flow control device are signal connected.

[0059] Practice has shown that the surface cooling effect of roller 9 is optimal when the spray nozzles are tilted downwards at an angle of 35°-40° to the vertical. Increasing or decreasing the angle reduces the cooling effect. Furthermore, to ensure effective cooling of the roller 9 exterior, a pressure monitoring device was added to the bottom of the cooling water pipes of each roller group. When the furnace temperature rises (after more than 13 heats in a long production run), the flow rate of the cooling water is increased via a flow control device; conversely, when the furnace temperature drops (after more than 13 heats in a long production run), the flow rate of the cooling water is decreased via the flow control device, ensuring effective cooling of the roller body. Through improvements to the water-cooled machine's spray system, the annual failure rate of roller 9 can be reduced from 180 times to 10 times.

[0060] Before this solution was implemented, the fixed section roller 9 frequently experienced water leakage and roller 9 not rotating, which affected the quality of the cast billet and forced the casting to stop. After adopting the solution of this application, it achieved great results, ensuring smooth production while greatly reducing the labor intensity of workers and creating incalculable indirect economic benefits.

[0061] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A continuous casting machine roller, characterized in that, It includes a roller, a rotary joint, and support members disposed at both ends of the roller. The roller has a cooling water channel in the middle. The rotary joint includes a housing, a first bearing, and a first rotating shaft. The housing has a first mounting cavity inside. The outer ring of the first bearing is fixed in the first mounting cavity. The inner ring of the first bearing is sleeved on the first rotating shaft. The first bearing is made of graphite. The housing has a water passage hole. The first rotating shaft has a connecting hole inside that connects the water passage hole to the cooling water channel. The support includes a bearing housing and a second bearing. The outer ring of the second bearing is fixed on the bearing housing, and the inner ring of the second bearing is connected to the end of the roller. The bearing housing is provided with a second mounting cavity, and an annular fifth limiting platform is provided inside the second mounting cavity. A flange is provided on the side of the second mounting cavity away from the roller, which can press the outer ring of the second bearing against the fifth limiting platform. The flange is sleeved on the end of the roller and fixed to the bearing housing. A spacer ring is provided between the fifth limiting platform and the outer ring of the second bearing; A spacer ring is provided between the flange and the outer ring of the second bearing; It also includes a lubricating oil inlet, which is located on the bearing seat between the second bearing and the spacer ring, and an oil seal is provided on the side of the second bearing near the roller; a sealing ring is provided between the flange and the end of the roller; The lubricating oil inlet is located below the second bearing, and the angle between the line connecting the lubricating oil inlet and the center of the second bearing and the vertical direction is 50°-60°.

2. The continuous casting machine roller according to claim 1, characterized in that, A first limiting platform and a first limiting groove are coaxially arranged on the inner wall of the first mounting cavity with the rotating shaft. The first limiting platform and the first limiting groove are respectively located on both sides of the outer ring of the first bearing. A first shaft clip capable of pressing the outer ring of the first bearing against the first limiting platform is provided in the first limiting groove.

3. The continuous casting machine roller according to claim 1, characterized in that, The outer surface of the first rotating shaft is provided with an annular second limiting platform and a second limiting groove. The second limiting platform and the second limiting groove are respectively located on both sides of the inner ring of the first bearing. A second shaft clip is provided in the second limiting groove, which can press the inner ring of the first bearing against the second limiting platform. A washer is also provided between the second shaft clip and the inner ring of the first bearing, and the washer is sleeved on the first rotating shaft.

4. The continuous casting machine roller according to claim 1, characterized in that, A connecting shaft is also provided at the end of the first rotating shaft away from the roller. An annular third limiting platform is provided on the outer surface of the connecting rotating shaft. An annular fourth limiting platform is also provided in the first mounting cavity. The inner diameter of the fourth limiting platform is adapted to the outer diameter of the connecting rotating shaft. An elastic member is provided between the fourth limiting platform and the third limiting platform for pushing the third limiting platform toward the first rotating shaft so that the connecting rotating shaft abuts against the end of the first rotating shaft. A sealing ring is provided between the connecting shaft and the fourth limiting platform shown; A sealing ring is provided between the connecting shaft and the first shaft.

5. The continuous casting machine roller according to claim 4, characterized in that, A blind hole is provided on the fourth limiting platform. The axis of the blind hole is arranged in the same direction as the axis of the first rotating shaft. An elastic element is provided inside the blind hole, and one end of the elastic element extending out of the blind hole abuts against the third limiting platform.

6. The continuous casting machine roller according to claim 1, characterized in that, The outer wall of the roller end is provided with an annular sixth limiting platform and an annular sixth limiting groove. The sixth limiting platform and the sixth limiting groove are respectively located on both sides of the inner ring of the second bearing. A retaining ring is provided in the sixth limiting groove to press the inner ring of the second bearing against the sixth limiting platform.

7. The continuous casting machine roller according to claim 1, characterized in that, A spray cooling device is provided above the roller. The spray cooling device includes a nozzle. The spray nozzle has water holes that are inclined downwards and have an angle of 35°-40° with the vertical direction. A pressure monitoring device and a flow control device are provided on the nozzle, and the pressure monitoring device and the flow control device are connected by signals.

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