Segmented combined bushing type large wide and thick plate supporting roll

Abstract

The invention discloses a segmented combined bushing type large wide and thick plate supporting roller, and belongs to the technical field of large supporting rollers. The large wide and thick plate supporting roller comprises a roller shaft and a roller sleeve arranged on the roller shaft in a sleeving mode, the outer surface of the roller shaft and an inner hole of the roller sleeve are each of a taper structure with the outer side diameter larger than the inner side diameter, additional axial force pointing to the middle of the roller shaft is formed after hot charging, and the interference magnitude of the outer side of the roller sleeve is smaller than that of the inner side of the roller sleeve; grooves are formed in the outer surface of the roller shaft and the inner surface of the roller sleeve, and the grooves of the roller shaft and the roller sleeve are matched to form an oil storage cavity; a wireless pressure test valve mounting hole communicated with the oil storage cavity is formed between the contact surfaces of the roller sleeve and the roller shaft, a wireless pressure test valve is mounted in the wireless pressure test valve mounting hole, and the wireless pressure test valve remotely displays the pressure of the oil storage cavity through the Internet of Things technology; the roller sleeve comprises a left side roller sleeve body, a middle roller sleeve body and a right side roller sleeve body which are sequentially arranged in the axial direction of the roller shaft and are inlaid with the roller shaft through overall hot charging.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of large supporting rollers, and particularly relates to a sectional combination sleeve type large wide-thick plate supporting roller. BACKGROUND

[0002] Wide-thick plate rolling mills are important equipment in modern industry, and thick plate products produced by the wide-thick plate rolling mills are core raw materials in key fields of the national economy such as shipbuilding, energy transportation and bridge construction. With the rapid development of China's shipbuilding industry, the three major indicators of shipbuilding in the first half of 2024 ranked first in the world, and the proportion of green ship orders exceeded 70%, and the shipyard orders were generally scheduled to 2027-2028. As a key material for aircraft carriers and large ships, the demand for super-wide-thick plates is showing a sustained growth trend.

[0003] The traditional whole-forging type wide-thick plate supporting roller faces many technical problems: the weight of the supporting roller blank with a length of more than 5000 mm and a diameter of more than 2000 mm is close to 300 tons, and defects such as core shrinkage and segregation are easily generated in the process of casting, forging and heat treatment; the rolling force of more than 8000 tons in the rolling process causes significant deflection of the supporting roller, the contact stress and bending moment borne by the two sides of the roller body are much larger than the middle part, and early failure phenomena such as peeling and block shedding at the roller end often occur. These problems not only cause the service life of the supporting roller to be greatly shortened, but also result in high production costs.

[0004] Although the existing sleeve type supporting roller technology can partially solve the problems of whole forging, it still has problems such as insufficient stability of the sleeve and the roller shaft, stress concentration at the roller end, etc. In particular, under the working condition of super-large wide-thick plate rolling, the traditional sleeve structure cannot effectively control the deformation of the sleeve, cannot realize accurate control of the roller shape, and lacks effective online monitoring means, which poses a safety hazard. In addition, the whole sleeve cannot be differentiated in material selection and process treatment according to the performance requirements of different working parts, which restricts the improvement of the comprehensive performance of the supporting roller. The existing technology needs to be improved in view of the above technical problems. SUMMARY

[0005] The present application provides a sectional combination sleeve type large wide-thick plate supporting roller, which has the advantages of improving the stability of the sleeve and the roller shaft, prolonging the service life of the supporting roller, and realizing real-time monitoring of pressure.

[0006] The sectional combination sleeve type large wide-thick plate supporting roller of the present application comprises a roller shaft and a sleeve set on the roller shaft, the outer surface of the roller shaft and the inner hole of the sleeve are both tapered structures with an outer diameter larger than an inner diameter, an additional axial force is formed after hot mounting and points to the middle part of the roller shaft, and the interference amount on the outer side of the sleeve is smaller than that on the inner side; The outer surface of the roller shaft and the inner surface of the roller sleeve are both provided with grooves, and the grooves of the two are matched to form an oil storage cavity; a wireless pressure test valve mounting hole communicating with the oil storage cavity is arranged between the contact surface of the roller sleeve and the roller shaft, and a wireless pressure test valve is mounted in the wireless pressure test valve mounting hole; the wireless pressure test valve remotely displays the pressure of the oil storage cavity through Internet of Things technology. The roller sleeve comprises a left side edge roller sleeve, a middle roller sleeve and a right side edge roller sleeve, and is arranged in sequence along the axial direction of the roller shaft and is fitted with the roller shaft through overall hot fitting.

[0007] Preferably, the left side edge roller sleeve and the right side edge roller sleeve are made of alloy structural steel 60CrNiMo and are forged and heat treated, and the middle roller sleeve is made of Cr5 high alloy material.

[0008] Preferably, the inner holes of the left side edge roller sleeve and the right side edge roller sleeve are both two-section structures of a cylindrical surface connected with a conical surface, and the inner hole of the middle roller sleeve is a three-section structure of a cylindrical surface connected with a conical surface at both ends; the outer surface of the roller shaft is provided with a structure matched with the inner holes of the roller sleeves, and the taper of the outer surface of the roller shaft is different from the taper of the inner holes of the corresponding roller sleeves, and the corresponding cylindrical surfaces are positioning reference surfaces.

[0009] Preferably, the application further comprises a high-pressure oil filling cup, which is arranged in the filling cup mounting hole and communicates with the oil storage cavity, and is used for filling high-pressure hydraulic oil into the oil storage cavity to realize the hydraulic expansion of the roller sleeve.

[0010] Preferably, the connection between the high-pressure oil filling cup and the roller sleeve is provided with a press-in oil cup polyurethane annular groove sealing ring and a press-in oil cup polyurethane sealing pad.

[0011] Preferably, the application further comprises an exhaust screw plug mounting hole, which is provided with an exhaust port screw plug, and the connection between the exhaust port screw plug and the roller sleeve is provided with an exhaust port screw plug sealing ring, and the exhaust port screw plug is fixed through an elastic check ring.

[0012] Preferably, the connection between the wireless pressure test valve and the roller sleeve is provided with a pressure test valve polyurethane annular groove sealing ring and a pressure test valve polyurethane sealing pad.

[0013] Preferably, the oil storage cavity comprises a left side hydraulic expansion sleeve oil cavity and a right side hydraulic expansion sleeve oil cavity, and the left side hydraulic expansion sleeve oil cavity is arranged corresponding to the mating surface of the left side edge roller sleeve and the roller shaft, and the right side hydraulic expansion sleeve oil cavity is arranged corresponding to the mating surface of the right side edge roller sleeve and the roller shaft.

[0014] The application has the following beneficial effects: (1) The present invention adopts a segmented roller sleeve structure, which divides the roller sleeve into three sections: the left side roller sleeve, the middle roller sleeve and the right side roller sleeve. This reduces the size of a single forging, reduces the difficulty of forging and heat treatment of oversized forgings, and reduces material loss, thereby reducing manufacturing costs. Different materials and processes can be used to separately process and manufacture each section of the roller sleeve according to the performance requirements of different parts, without the need for unified and complex processing of the entire roller sleeve, further reducing the manufacturing difficulty.

[0015] (2) The edge roller sleeves on both sides of the roller body of the present invention are forged and heat-treated with alloy structural steel 60CrNiMo, ensuring the comprehensive performance of the working layer at the end of the support roller body, such as strength, toughness, wear resistance, and fatigue resistance; the middle roller sleeve is made of Cr5 high-alloy material, which improves the hardness of the working layer and the depth of the hardened layer to enhance wear resistance. The performance of each part is adapted to its working requirements, extending the overall service life. In addition, the roller shaft and the inner hole of the roller sleeve are designed to have a tapered structure with an outer diameter larger than the inner diameter. After hot-fitting, an additional axial force is generated pointing to the middle of the roll, and the outer interference of the roller sleeve is smaller than the inner interference, so that the radial stress and circumferential stress of the roller sleeve edge are smaller than those in the middle, preventing the roller sleeve and the roller shaft from sliding and slipping, extending the life of crack initiation and expansion at the edge of large support rollers, effectively improving the problem of roller end peeling and chipping, reducing the passive grinding or scrapping caused by roller end defects, and improving the service life.

[0016] (3) The present invention forms an oil storage cavity by providing grooves on the inner surface of the roller sleeve and the outer surface of the roller shaft. The hydraulic oil is added under pressure to realize the hydraulic expansion of the roller sleeve, thereby controlling the roller shape of the roller sleeve, reducing the bending force of the extra-large wide and thick plate rolling mill, and further reducing the roller neck bending moment.

[0017] (4) The present invention installs a wireless pressure measuring instrument between the roller sleeve and the roller shaft contact surface, and uses the Internet of Things technology to remotely display the oil storage chamber pressure. It can not only regulate the oil storage chamber pressure, but also monitor the pressure changes in real time, thereby realizing safe online operation monitoring of the sleeved roller. It can play a key early warning role in the event of abnormal pressure and ensure the safe operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] For ease of explanation, the present invention is described in detail with reference to the following specific implementations and accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the overall assembly structure of the present invention; Figure 2 for Figure 1 Middle A direction view; Figure 3 for Figure 1 Middle B direction view Figure 4 for Figure 1 Partial view at center Ⅰ; Figure 5For Figure 1 partial view at II; Figure 6 For Figure 1 partial view at III; Figure 7 For Figure 4 partial view at IV; Figure 8 For Figure 5 partial view at V; Figure 9 For Figure 6 partial view at VI; Figure 10 For schematic view of the roller structure; Figure 11 Figure 10 For view in direction C; Figure 12 Figure 10 For view in direction D; Figure 13 For Figure 14 For Figure 10 partial views at VII, VIII and IX.

[0020] In the drawings: 1 - left side edge roller cover; 2 - high pressure oil filling cup; 3 - polyurethane annular groove sealing ring of the high pressure oil filling cup; 4 - polyurethane sealing gasket of the high pressure oil filling cup; 5 - roller shaft; 6 - wireless pressure test valve; 7 - polyurethane annular groove sealing ring of the pressure test valve; 8 - polyurethane sealing gasket of the pressure test valve; 9 - middle roller cover; 10 - right side edge roller cover; 11 - exhaust port screw plug sealing ring; 12 - exhaust port screw plug; 13 - elastic retainer; 14 - wireless pressure test valve mounting hole; 15 - filling cup mounting hole; 16 - exhaust screw plug mounting hole; 17 - left side hydraulic expansion sleeve oil cavity; 18 - right side hydraulic expansion sleeve oil cavity. DETAILED DESCRIPTION

[0021] The following is a specific embodiment of the present application and further describes the technical solutions of the present application in conjunction with the drawings, but the present application is not limited to these embodiments; in the following description, specific details such as specific configurations and components are provided only to help a comprehensive understanding of the embodiments of the present application. Therefore, it should be clear to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, in order to be clear and concise, the description of known functions and structures is omitted.

[0022] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0023] In the prior art, the supporting roller of a wide and thick plate rolling mill has the problems of complex forging process and difficult control of residual stress in heat treatment due to the excessively large overall forging size, resulting in fatigue cracks and peeling defects at the end of the roller body. The traditional overall supporting roller has large roller body deflection during rolling, and the stress concentration at the roller end is significant after the application of bending force, which shortens the service life. The existing sleeve structure can reduce the difficulty of forging, but cannot realize the segmented performance regulation of the roller sleeve, and lacks effective axial self-locking and pressure monitoring mechanism, resulting in high risk of roller sleeve movement and inability to meet the requirements of roller shape accuracy and service safety for special wide and thick plate rolling.

[0024] To solve the above problems, the researchers noticed that the segmented design can reduce the size of the individual roller sleeve, but the axial positioning and stress distribution of the multi-segmented roller sleeve need to be solved. By analyzing the mechanical properties of the taper fit, it is found that the tapered structure with the outer diameter larger than the inner diameter can generate an axial force towards the middle part after hot charging, and the variable interference amount design can optimize the stress gradient. Further considering the effect of hydraulic expansion on roller shape adjustment, the pressure controllable deformation is realized in combination with the groove oil storage cavity structure. To meet the real-time monitoring requirement, a wireless pressure test valve and Internet of Things technology are introduced to form a closed-loop control system. Finally, the roller sleeve is divided into left, middle and right three segments, and the performance zoning optimization is realized through differential materials and hot charging process.

[0025] Therefore, the present application provides a segmented combined sleeve type large wide and thick plate supporting roller, as shown in Figures 1-14 The large wide and thick plate supporting roller includes a roller shaft 5 and a roller sleeve sleeved on the roller shaft 5. The outer surface of the roller shaft 5 and the inner hole of the roller sleeve are both tapered structures with the outer diameter larger than the inner diameter. After hot charging, an additional axial force is formed towards the middle part of the roller shaft 5, and the interference amount on the outer side of the roller sleeve is smaller than that on the inner side. The outer surface of the roller shaft 5 and the inner surface of the roller sleeve are both provided with grooves, and the grooves of the two form an oil storage cavity in cooperation. A wireless pressure test valve mounting hole 14 is arranged between the contact surface of the roller sleeve and the roller shaft 5, and a wireless pressure test valve 6 is mounted in the wireless pressure test valve mounting hole 14. The wireless pressure test valve 6 remotely displays the pressure of the oil storage cavity through the Internet of Things technology. The roller sleeve includes a left side edge roller sleeve 1, a middle roller sleeve 9 and a right side edge roller sleeve 10, and is arranged in sequence along the axial direction of the roller shaft 5 and is completed by hot charging with the roller shaft 5.

[0026] Specifically, the outer surface of the roll shaft 5 and the inner hole of the roll sleeve are both conical structures, and the conical fitting surfaces produce a radial shrinkage difference during the hot assembly and cooling process, forming a distribution of the interference amount decreasing from the middle to both sides, effectively reducing the tensile stress of the end of the roll sleeve. The oil storage cavity produces uniform radial expansion force after injecting high-pressure oil, compensating for the elastic deformation during rolling, so that the roll body maintains the preset arc. The wireless pressure test valve 6 collects oil pressure data in real time, and when abnormal pressure fluctuation is detected, the Internet of Things system automatically triggers a warning signal. The left, middle and right three sections of the roll sleeve are made of different alloy materials, and during the hot assembly process, the interference amount gradient distribution is realized through the difference in the taper, so that the end roll sleeve bears lower contact stress and delays the initiation of fatigue cracks.

[0027] Through the above technical solutions, the forging difficulty of the extra-large backup roll is effectively reduced, the roll sleeve movement is inhibited through the taper fitting and variable interference amount design, the rolling deformation is compensated by hydraulic expansion, the material performance is optimized by the segmented structure, the operation safety is guaranteed by the Internet of Things pressure monitoring, and the service life of the backup roll is prolonged as a whole.

[0028] The left side edge roll sleeve 1 and the right side edge roll sleeve 10 are further made of alloy structural steel 60CrNiMo and are forged and heat treated, and the middle roll sleeve 9 is made of Cr5 high alloy material. The edge roll sleeve and the middle roll sleeve are made of different materials and are separately forged and heat treated to control the different working performance requirements of the working layers on both sides and the middle of the roll body, which can greatly reduce the procurement cost of the backup roll and significantly improve the service life of the sleeve backup roll.

[0029] The inner hole of the left side edge roll sleeve 1 and the right side edge roll sleeve 10 is a two-section structure of a cylindrical surface connecting a conical surface, and the inner hole of the middle roll sleeve 9 is a three-section structure of a cylindrical surface connecting a conical surface at both ends; the outer surface of the roll shaft 5 is provided with a structure matched with the inner hole of each roll sleeve, and the taper of the outer surface of the roll shaft 5 is different from the taper of the inner hole of the corresponding roll sleeve, and the corresponding cylindrical surface is a positioning reference surface.

[0030] Specifically, the two-section structure of the inner hole of the left side edge roll sleeve 1 and the right side edge roll sleeve 10 realizes axial positioning through the cylindrical surface, and the conical surface and the taper difference of the roll shaft form a contact surface interference amount gradient. The three-section structure of the inner hole of the middle roll sleeve 9 is provided with reverse tapers on both sides of the cylindrical surface, and forms a distribution state of large middle interference amount and small side interference amount after being matched with the roll shaft 5. During the hot assembly process, the taper difference between the roll shaft 5 and the roll sleeve causes the contact surface to generate an additional axial force pointing to the middle, effectively inhibiting the axial roll sleeve movement. The cylindrical surface as the positioning reference can ensure the coaxial assembly of each roll sleeve and the roll shaft, and the self-locking effect formed by the taper difference maintains the pressure distribution of the fitting surface. The three-section structure of the middle roll sleeve 9 forms a decreasing gradient of the interference amount in the axial direction, reduces the side contact stress, and delays the initiation of fatigue cracks.

[0031] By the technical scheme, axial relative displacement of the roll sleeve and the roll shaft after hot mounting can be effectively prevented, and the contact stress of the edge of the roll sleeve is reduced by the gradient distribution of the interference amount, and fatigue crack propagation is delayed. The composite structure of the cylindrical surface reference positioning and the conical surface self-locking not only ensures assembly stability, but also realizes stress optimization control of different regions of the roll sleeve, and significantly prolongs the service life of the end of the backup roll.

[0032] The application further provides a high-pressure oil filling cup 2 arranged in the oil filling cup mounting hole 15 and in communication with the oil storage cavity, and used for filling high-pressure hydraulic oil into the oil storage cavity to realize hydraulic expansion of the roll sleeve.

[0033] Specifically, after the high-pressure hydraulic oil is injected into the oil storage cavity through the high-pressure oil filling cup 2, the hydraulic pressure uniformly acts on the inner surface of the roll sleeve, so that the roll sleeve generates controllable elastic deformation, and the geometric shape of the outer surface of the roll sleeve can be accurately controlled by adjusting the oil pressure parameter to form a required roll shape crown. During the hydraulic expansion, the contact stress distribution between the roll sleeve and the roll shaft 5 is actively optimized, which not only ensures the reliability of the interference fit, but also reduces the bending force required in the rolling process through roll shape adjustment; the hydraulic expansion force and the axial self-locking force generated by the hot mounting form a synergistic effect, which prevents the axial movement of the roll sleeve and further balances the stress state of different regions of the roll body.

[0034] The application further provides that the connection between the high-pressure oil filling cup 2 and the roll sleeve is provided with a press-in oil cup polyurethane annular groove sealing ring 3 and a press-in oil cup polyurethane sealing gasket 4. The press-in oil cup polyurethane annular groove sealing ring 3 maintains radial sealing pressure, and the press-in oil cup polyurethane sealing gasket 4 fills the end surface gap through material elasticity to block the axial leakage path.

[0035] The application further provides an exhaust screw plug mounting hole 16, which is provided with an exhaust port screw plug 12, the connection between the exhaust port screw plug 12 and the roll sleeve is provided with an exhaust port screw plug sealing ring 11, and the exhaust port screw plug 12 is fixed by an elastic stopper 13.

[0036] Specifically, during the hot mounting or hydraulic expansion process, residual gas / oil in the oil storage cavity is discharged through the exhaust screw plug mounting hole 16, and the operator can unscrew the exhaust port screw plug 12 to release the gas / oil. The exhaust port screw plug sealing ring 11 is deformed under pressure to fill the thread gap, forming a static sealing interface to block the oil leakage path. The elastic stopper 13 generates a continuous radial restraint force to prevent the exhaust port screw plug 12 from loosening under vibration or pressure fluctuation. The combined structure eliminates the gas cavity compression effect through physical exhaust, and maintains the stability of the system pressure by using a double sealing and mechanical locking mechanism.

[0037] The application further proposes that the connection between the wireless pressure test valve 6 and the roller cover is provided with a pressure test valve polyurethane annular groove sealing ring 7 and a pressure test valve polyurethane sealing gasket 8. The pressure test valve polyurethane annular groove sealing ring 7 is pressed into the annular groove at the connection of the roller cover, and the radial pressure generated by the elastic deformation can effectively prevent the hydraulic oil in the oil storage cavity from leaking outward in the axial direction, and the pressure test valve polyurethane sealing gasket 8 can prevent the hydraulic oil from seeping out from the connection gap.

[0038] The application further proposes that the oil storage cavity includes a left hydraulic expansion sleeve oil cavity 17 and a right hydraulic expansion sleeve oil cavity 18, the left hydraulic expansion sleeve oil cavity 17 is arranged corresponding to the mating surface of the left side edge roller cover 1 and the roller shaft 5, and the right hydraulic expansion sleeve oil cavity 18 is arranged corresponding to the mating surface of the right side edge roller cover 10 and the roller shaft 5. By dividing the oil storage cavity into two independent cavities on the left and right sides, respectively corresponding to the mating areas of the two side edge roller covers and the roller shaft, the oil injection pressure of the two side oil cavities can be adjusted separately during the hydraulic expansion process.

[0039] It should be noted that the terms used herein are only intended to describe specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, they indicate the presence of the features, steps, operations, devices, components and / or combinations thereof.

[0040] In the description of the present application, it should be understood that the terms "upper", "lower", etc. indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0041] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

Claims

1. A segmented combined sleeve-type large-scale wide and thick plate support roller, characterized in that: include: The roller comprises a roller shaft (5) and a roller sleeve sleeved on the roller shaft (5), wherein the outer surface of the roller shaft (5) and the inner hole of the roller sleeve are both tapered structures with an outer diameter larger than an inner diameter, and an additional axial force directed toward the middle of the roller shaft (5) is generated after hot-fitting, and the interference of the outer side of the roller sleeve is smaller than the interference of the inner side; The outer surface of the roller shaft (5) and the inner surface of the roller sleeve are both provided with grooves, and the grooves of the two cooperate to form an oil storage cavity; a wireless pressure test valve mounting hole (14) communicating with the oil storage cavity is provided between the contact surface of the roller sleeve and the roller shaft (5), and a wireless pressure test valve (6) is installed in the wireless pressure test valve mounting hole (14), and the wireless pressure test valve (6) remotely displays the pressure of the oil storage cavity through the Internet of Things technology; The roller sleeve comprises a left side roller sleeve (1), a middle roller sleeve (9) and a right side roller sleeve (10), which are sequentially arranged along the axial direction of the roller shaft (5) and are integrally heat-fitted with the roller shaft (5) to complete the sleeve insertion.

2. The segmented combined sleeve-type large-scale wide and thick plate support roller according to claim 1 is characterized in that: The left side roller sleeve (1) and the right side roller sleeve (10) are made of alloy structural steel 60CrNiMo by forging and heat treatment, and the middle roller sleeve (9) is made of Cr5 high alloy material.

3. The segmented combined sleeve-type large-scale wide and thick plate support roller according to claim 1 is characterized in that: The inner holes of the left side roller sleeve (1) and the right side roller sleeve (10) are both two-stage structures with a cylindrical surface connected to a conical surface, and the inner hole of the middle roller sleeve (9) is a three-stage structure with two ends of a cylindrical surface connected to a conical surface; The outer surface of the roller shaft (5) is provided with a structure adapted to the inner hole of each roller sleeve, and the taper of the outer surface of the roller shaft (5) is different from the taper of the inner hole of the corresponding roller sleeve, and the corresponding cylindrical surface is a positioning reference surface.

4. The segmented combined sleeve-type large-scale wide and thick plate support roller according to claim 1 is characterized in that: It also includes a high-pressure oil filling cup (2), which is arranged in the filling cup mounting hole (15) and communicates with the oil storage cavity, and is used to fill the oil storage cavity with high-pressure hydraulic oil to achieve hydraulic expansion of the roller sleeve.

5. The segmented combined sleeve-type large-scale wide and thick plate support roller according to claim 4 is characterized in that: A pressure oil cup polyurethane annular groove sealing ring (3) and a pressure oil cup polyurethane sealing pad (4) are provided at the connection between the high-pressure oil filling cup (2) and the roller sleeve.

6. The segmented combined sleeve-type large-scale wide and thick plate support roller according to claim 1 is characterized in that: It also includes an exhaust screw plug mounting hole (16), an exhaust port screw plug (12) is provided at the exhaust screw plug mounting hole (16), an exhaust port screw plug sealing ring (11) is provided at the connection between the exhaust port screw plug (12) and the roller sleeve, and the exhaust port screw plug (12) is fixed by an elastic retaining ring (13).

7. The segmented combined sleeve-type large-scale wide and thick plate support roller according to claim 1 is characterized in that: A pressure test valve polyurethane annular groove sealing ring (7) and a pressure test valve polyurethane sealing pad (8) are provided at the connection between the wireless pressure test valve (6) and the roller sleeve.

8. The segmented combined sleeve-type large-scale wide and thick plate support roller according to claim 1 is characterized in that: The oil storage chamber includes a left hydraulic expansion sleeve oil chamber (17) and a right hydraulic expansion sleeve oil chamber (18), wherein the left hydraulic expansion sleeve oil chamber (17) is arranged corresponding to the mating surface between the left side roller sleeve (1) and the roller shaft (5), and the right hydraulic expansion sleeve oil chamber (18) is arranged corresponding to the mating surface between the right side roller sleeve (10) and the roller shaft (5).

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