A straightening machine roller system bearing dismounting device

Abstract

The utility model relates to a straightening machine roller system bearing dismounting device, including bearing, both ends of bearing are fixedly connected with the one -side wall surface of bearing clamp ring respectively, one -side wall surface of bearing clamp ring is fixedly connected with fixed bolt respectively, fixed bolt penetrates bearing clamp ring fixed platform, through nut with fixed bolt is fixedly installed in bearing clamp ring fixed platform respectively, bearing clamp ring fixed platform fixed mounting is in the surface of work table, bearing bottom surface fixedly connected with the adjustment control valve table, the one side of adjustment control valve table is fixedly connected with a plurality of pipelines, the other side of adjustment control valve table is fixedly connected with electric hydraulic pump, electric hydraulic pump is fixedly connected with motor, motor is fixedly connected with plunger pump, bearing side wall surface fixedly connected with roller, the surface fixed mounting of work table hydraulic jack, the utility model has the advantages of: solve the problem that bearing is difficult to dismount because of too short width of shaft shoulder, too close interval between adjacent features of assembly parts, improve the safety in the process of dismantling, save equipment investment cost.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary tools for bearings of straightening machine roller systems, specifically a bearing disassembly and assembly device. Background Technology

[0002] In the production of medium and heavy plates, various factors, such as uneven heating, uneven temperature during rolling, uneven reduction, and uneven distribution of cooling water, can lead to unevenness defects in the steel plate, such as warping or waviness. The role of the straightener is to eliminate these unevennesses in the original curvature through multiple elastic-plastic reverse bending, and gradually level the steel plate to achieve the required straightness standard. During production, due to abnormal surface quality of the strip, the purpose of disassembling and assembling the straightener bearings is to facilitate the easy removal and replacement of the bearing housing after the support rollers wear, and also to address the potential adhesion or rusting problems between the support roller bearing housing and the roller box due to long-term use. In traditional installation methods, the small clearance fit between the support roller bearing housing and the roller box makes it difficult to disassemble the bearing housing due to the harsh working environment and rusting when the support roller needs to be disassembled after wear. This prolongs the maintenance time of the straightener roller system and affects the production progress. During disassembly and assembly, the roller design conditions of compact roller distribution, large roller diameter and short shaft end result in interference from the roller body and a small space for the roller body side bearing housing end cover to move. Using the end cover for disassembly and assembly under force will cause the end cover to deform and cause oil leakage and other problems. The axial interval for removing the bearing is extremely small.

[0003] Therefore, it is necessary to design a device specifically for the disassembly and assembly of bearings in the roller system of a straightener, which can better solve the aforementioned practical problems. Utility Model Content

[0004] The purpose of this utility model is to provide a bearing disassembly and assembly device that has a reasonable structural design, is easy to process, has low processing and manufacturing costs, is convenient to operate on-site, and is safe and reliable to use. It can completely disassemble the bearing, solves the problem that it is difficult to disassemble the bearing because the shoulder width is too small and the adjacent features of the assembly parts are too close. It effectively protects against dangerous factors such as hydraulic oil splashing and spurting during the bearing disassembly process, improves the safety of the disassembly process, and saves equipment investment costs.

[0005] This utility model discloses a bearing assembly / disassembly device for a straightening machine roller system, comprising a bearing, with bearing retaining rings fixedly connected to both ends of the bearing, and fixing bolts fixedly connected to one side wall of each bearing retaining ring. The fixing bolts pass through a bearing retaining ring fixing platform and are fixedly installed on the bearing retaining ring fixing platform by nuts. The bearing retaining ring fixing platform is fixedly installed on the surface of a worktable. An adjusting control valve platform is fixedly connected to the bottom surface of the bearing, with multiple pipelines fixedly connected to one side of the adjusting control valve platform and an electric hydraulic pump fixedly connected to the other side. The electric hydraulic pump is fixedly connected to an electric motor, and the electric motor is fixedly connected to a plunger pump. Rollers are fixedly connected to the side wall of the bearing, and a hydraulic jack is fixedly installed on the surface of the worktable.

[0006] The hydraulic jack is fixedly installed on the surface of the hydraulic jack fixing platform, and the hydraulic jack fixing platform is fixedly installed on the surface of the workbench.

[0007] The jack head is a tubular structure with a groove at one end.

[0008] The set-top workbench provides support for the entire disassembly and assembly device, while also providing an operating platform for convenient and quick bearing removal. The included bearing retainer ring can be fixedly installed on the outer ring of the bearing, forming a connection with the bearing. It can be used in conjunction with a hydraulic jack, employing 35MPa pressure to create an oil film on the inner ring to open the bearing's inner ring. The bearing can then be removed by pulling it outwards. This allows the retainer ring to remove the bearing without requiring excessive pressure, solving the problem of difficulty in disassembling bearings when the shoulder width is too small or the distance between the bearing and adjacent features of the assembly parts is too close. The operation is convenient, time-saving, and labor-saving, reducing the risk of cutting the bearing. After cleaning and inspection, the bearing can be reused, saving costs and improving efficiency. The bearing life is increased; the hydraulic jack fixing platform can be used to fix the hydraulic jack, making it more secure and safer to operate; the electric hydraulic pump is fixedly connected to the electric motor, which converts electrical energy into mechanical energy and drives the electric hydraulic pump to rotate through the fixed connection. The electric hydraulic pump then converts the mechanical energy into the pressure energy of the liquid to provide power to the hydraulic system; the fixed connection between the electric motor and the piston pump ensures the sealing and fixation of the connection sleeve between the electric motor and the piston pump, avoiding loosening or leakage during operation, ensuring the safe operation of the hydraulic system, and also reducing vibration transmission between the electric motor and the piston pump, thereby reducing noise and protecting the hydraulic system.

[0009] The jack head has a groove at the end, which allows the hydraulic hose to be inserted into the bearing shaft connection hole. The hydraulic hose is mainly used for flexible connection between the moving bearing and the electric hydraulic pump. This flexible connection allows hydraulic fluid to be transmitted between the moving bearing and the electric hydraulic pump, while reducing stress and wear caused by mechanical movement. It also has the functions of vibration absorption and noise reduction, ensuring the normal and stable operation of the electric hydraulic pump.

[0010] The side wall of the workbench is hinged with a protective cover.

[0011] The protective cover is hinged to the side wall of the workbench. When the hydraulic jack is used, it forms an openable protective net to prevent accidental damage or breakage of the hydraulic jack during operation, which could cause liquid or parts to splash out and injure people. This fully ensures the safety of the operators and makes the operation safer and more reliable.

[0012] The edge of the bearing retainer ring fixing platform is flush with the edge of the worktable. There are two bearing retainer ring fixing platforms, which are symmetrically arranged along the center of the worktable.

[0013] The bearing retaining ring consists of two semi-rings with teeth on the inner ring, and the two semi-rings are connected by threads.

[0014] The bearing retainer consists of two toothed semi-rings connected by threads. During operation, the bearing retainer grips the oil passage of the outer ring of the bearing. Since the bearing inner ring is mainly opened by the hydraulic oil film pressure, the bearing retainer can pull out the bearing without much pressure. The auxiliary hydraulic jack can completely and quickly disassemble the bearing, making the operation more convenient, time-saving and labor-saving.

[0015] The beneficial effects of this utility model are: 1) The workbench provides support for the entire assembly and disassembly device, while also offering an operating platform for easy and quick bearing removal. The included bearing retainer ring can be fixedly installed on the outer ring of the bearing, forming a connection. It can be used in conjunction with a hydraulic jack, employing 35MPa pressure to create an oil film on the inner ring to open it, allowing for easy removal of the bearing by pulling it out. This eliminates the need for excessive pressure from the retainer ring, solving the problem of difficulty in disassembling bearings when the shoulder width is too small or the distance between the bearing and adjacent features of the assembly parts is too close. The operation is convenient, time-saving, and labor-saving, reducing the risk of cutting the bearing. After cleaning and inspection, the bearing can be reused, saving costs. The bearing life is improved; the hydraulic jack fixing platform can be used to fix the hydraulic jack, making it more secure and safer to operate; the electric hydraulic pump is fixedly connected to the electric motor, which converts electrical energy into mechanical energy and drives the electric hydraulic pump to rotate through the fixed connection. The electric hydraulic pump then converts the mechanical energy into the pressure energy of the liquid to provide power to the hydraulic system; the fixed connection between the electric motor and the piston pump ensures the sealing and fixation of the connection sleeve between the electric motor and the piston pump, avoiding loosening or leakage during operation, ensuring the safe operation of the hydraulic system, and reducing vibration transmission between the electric motor and the piston pump, thereby reducing noise and protecting the hydraulic system.

[0016] 2) The end of the jack head is provided with a groove, which allows the hydraulic hose to be inserted into the bearing shaft end connection hole. The hydraulic hose is mainly used for flexible connection between the moving bearing and the electric hydraulic pump. This flexible connection allows hydraulic fluid to be transmitted between the moving bearing and the electric hydraulic pump, while reducing stress and wear caused by mechanical movement. It also has the functions of vibration absorption and noise reduction, ensuring the normal and stable operation of the electric hydraulic pump.

[0017] 3) The protective cover is hinged to the side wall of the workbench. When the hydraulic jack is used, it forms an openable protective net to prevent the hydraulic jack from being accidentally damaged or broken during operation, which could cause liquid or parts to splash out and injure people. This fully ensures the safety of the operators and makes the operation safer and more reliable.

[0018] 4) The bearing retainer is composed of two semi-rings with teeth on the inner ring, which are connected by threads. During operation, the bearing retainer holds the bearing in the oil passage of the outer ring of the bearing. Since the bearing inner ring is mainly opened by the hydraulic oil film pressure, the bearing retainer can pull out the bearing without much pressure. The auxiliary hydraulic jack can completely and quickly disassemble the bearing, making the operation more convenient, time-saving and labor-saving.

[0019] 5) The device has a reasonable structural design, is easy to process, has low processing and manufacturing costs, is convenient to operate on-site, and is safe and reliable to use. It can completely disassemble the bearing, solving the problem that it is difficult to disassemble the bearing because the shoulder width is too small and the adjacent features of the assembly parts are too close. It effectively protects against dangerous factors such as hydraulic oil splashing during the bearing disassembly process, improves the safety of the disassembly process, and saves equipment investment costs. It has been put into use and the effect is good. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram showing the connection of the pipeline, regulating control valve platform and plunger pump in this utility model; Figure 3 This is a schematic diagram of the bearing retaining ring in this utility model.

[0021] In the diagram: 1. Roller; 2. Bearing; 3. Electric hydraulic pump; 4. Hydraulic hose; 5. Workbench; 6. Hydraulic jack; 7. Bearing retainer ring; 8. Protective cover; 9. Electric motor; 10. Piston pump; 11. Adjustment control valve platform; 12. Pipeline; 13. Jack rod; 14. Hydraulic jack fixing platform; 15. Jack head; 15. Groove; 16. Bearing retainer ring fixing platform; 17. Half ring. Detailed Implementation

[0022] Example 1. The present invention will be further described below with reference to the accompanying drawings.

[0023] This utility model includes a roller 1, a bearing 2, an electric hydraulic pump 3, a hydraulic hose 4, a worktable 5, a hydraulic jack 6, a bearing retainer 7, an electric motor 9, a plunger pump 10, an adjusting control valve platform 11, pipelines 12, a jack rod 13, a hydraulic jack fixing platform 14, a jack head 15, a groove 1501, a bearing retainer fixing platform 16, and a half-ring 17. Specifically, the bearing 2 has bearing retainers 7 fixedly connected to both ends, and fixing bolts 701 are fixedly connected to one side wall of the bearing retainer 7, with the fixing bolts 701 penetrating the bearing retainer. A fixed platform 16 is fixedly installed on the bearing retainer circlip fixing platform 16 by nuts, and the bearing retainer circlip fixing platform 16 is fixedly installed on the surface of the workbench 5; an adjustment control valve platform 11 is fixedly connected to the bottom surface of the bearing 2, multiple pipelines 12 are fixedly connected to one side of the adjustment control valve platform 11, an electric hydraulic pump 3 is fixedly connected to the other side of the adjustment control valve platform 11, the electric hydraulic pump 3 is fixedly connected to the electric motor 9, and the electric motor 9 is fixedly connected to the plunger pump 10; a roller 1 is fixedly connected to the side wall of the bearing 2, and a hydraulic jack 6 is fixedly installed on the surface of the workbench 5.

[0024] The hydraulic jack 6 is fixedly installed on the surface of the hydraulic jack fixing platform 14, and the hydraulic jack fixing platform 14 is fixedly installed on the surface of the workbench 5.

[0025] The jack head 15 is a tubular structure, and a groove 1501 is provided at the end of the jack head 15.

[0026] The edge of the bearing retainer circlip fixing platform 16 is flush with the edge of the worktable 5. There are two bearing retainer circlip fixing platforms 16, which are symmetrically arranged along the center of the worktable 5.

[0027] The bearing retaining ring 7 is composed of two half-rings 17 with teeth on the inner ring, and the two half-rings 17 are connected by threads.

[0028] Instructions for use: First, calculate the assembly preload based on the bearing installation tolerance. Then, select an appropriate pressure based on the preload and pump hydraulic oil into the inner ring of the bearing to form a supporting oil film. After that, fix the bearing retainer 7 on the outer ring of the bearing 2 and use the hydraulic jack 6 to push it out.

[0029] The assembly preload is calculated as follows: The assembly tolerance of bearing 2 is H7 / p6, where the bearing inner diameter d = 160 (+0^-0.025mm), the shaft outer diameter D = 160 (+0.068^+0.043mm), and the assembly tolerance zone is an interference fit H7 / p6 (+0.093^+0.043mm), that is, the interference is between 0.043mm and 0.093mm. The bearing interference width is Hh = 86-4 = 82mm, where H is the bearing width and h is the chamfer width at both ends of the bearing.

[0030] Calculate F = Fm + Fs + Fc Wherein, Fm is the frictional force, calculated by the formula Fm = μ * Fn, where μ is the coefficient of friction and Fn is the normal force; Fs is the elastic deformation force, calculated by the formula Fs = E * δ, where E is the elastic modulus of the material and δ is the elastic deformation; Fc is the indentation force, calculated by the formula Fc = K * δ, where K is the indentation coefficient in fit measurement and δ is the indentation amount.

[0031] Substituting the values, the maximum assembly press-in preload is calculated to be approximately 38.6 kN.

[0032] The maximum radial circumferential pressure is approximately 120 kN.

[0033] The electric hydraulic pump 3 is designed with a pressure of 50MPa and can be steplessly adjusted from 5 to 50MPa. A pipeline 12 is connected from the outlet of the electric hydraulic pump 3 as an oil film supply pipeline. This oil supply is controlled separately from the oil supply pipeline of the hydraulic jack 6. When removing the bearing 2, the bearing retainer 7 is installed on the outer ring of the bearing 2 and then hoisted onto the bearing retainer fixing platform 16. The hydraulic hose 4 is connected to the shaft end connection hole. The hydraulic jack 6 is installed on the hydraulic jack fixing platform 14. The hydraulic jack rod 13 is pushed out and placed on the jack head 15, and then pushed out to the bearing 2 shaft end position. The hydraulic jack 6 pressure is pushed up to 5MPa. The hydraulic oil film pressure is adjusted upward from 20MPa until the bearing 2 shows signs of loosening. The hydraulic jack 6 pressure is increased again until it is pushed out halfway. The oil film begins to seep out. The oil film hydraulic circuit is shut off. The hydraulic jack 6 is pushed out until the bearing 2 is completely removed.

[0034] When installing bearing 2, there is no need to connect the hydraulic oil film line. Simply apply oil to the shaft end and inner ring of bearing 2 and then use the hydraulic jack 6 to push it into the standard position.

[0035] Example 2. This utility model includes a roller 1, a bearing 2, an electric hydraulic pump 3, a hydraulic hose 4, a workbench 5, a hydraulic jack 6, a bearing retaining ring 7, a protective cover 8, a motor 9, a plunger pump 10, an adjusting control valve platform 11, pipelines 12, a jack rod 13, a hydraulic jack fixing platform 14, a jack head 15, a groove 1501, a bearing retaining ring fixing platform 16, and a half-ring 17. Specifically, the bearing 2 has bearing retaining rings 7 fixedly connected to both ends, and fixing bolts 701 are fixedly connected to one side wall of the bearing retaining ring 7, with the fixing bolts 701 penetrating the bearing retaining ring. The bearing retaining ring fixing platform 16 is fixedly installed on the bearing retaining ring fixing platform 16 by fixing bolts 701 with nuts. The bearing retaining ring fixing platform 16 is fixedly installed on the surface of the workbench 5. The bottom surface of the bearing 2 is fixedly connected to the regulating control valve platform 11. Multiple pipelines 12 are fixedly connected to one side of the regulating control valve platform 11. The other side of the regulating control valve platform 11 is fixedly connected to the electric hydraulic pump 3. The electric hydraulic pump 3 is fixedly connected to the electric motor 9. The electric motor 9 is fixedly connected to the plunger pump 10. The side wall of the bearing 2 is fixedly connected to the roller 1. The surface of the workbench 5 is fixedly installed with the hydraulic jack 6.

[0036] The side wall of the workbench 5 is hinged with a protective cover 8.

[0037] The hydraulic jack 6 is fixedly installed on the surface of the hydraulic jack fixing platform 14, and the hydraulic jack fixing platform 14 is fixedly installed on the surface of the workbench 5.

[0038] The jack head 15 is a tubular structure, and a groove 1501 is provided at the end of the jack head 15.

[0039] The edge of the bearing retainer circlip fixing platform 16 is flush with the edge of the worktable 5. There are two bearing retainer circlip fixing platforms 16, which are symmetrically arranged along the center of the worktable 5.

[0040] The bearing retaining ring 7 is composed of two half-rings 17 with teeth on the inner ring, and the two half-rings 17 are connected by threads.

[0041] Instructions for use: First, calculate the assembly preload based on the bearing installation tolerance. Then, select an appropriate pressure based on the preload and pump hydraulic oil into the inner ring of the bearing to form a supporting oil film. After that, fix the bearing retainer 7 on the outer ring of the bearing 2 and use the hydraulic jack 6 to push it out.

[0042] The assembly preload is calculated as follows: The assembly tolerance of bearing 2 is H7 / p6, where the bearing inner diameter d = 160 (+0^-0.025mm), the shaft outer diameter D = 160 (+0.068^+0.043mm), and the assembly tolerance zone is an interference fit H7 / p6 (+0.093^+0.043mm), that is, the interference is between 0.043mm and 0.093mm. The bearing interference width is Hh = 86-4 = 82mm, where H is the bearing width and h is the chamfer width at both ends of the bearing.

[0043] Calculate F = Fm + Fs + Fc Wherein, Fm is the frictional force, calculated by the formula Fm = μ * Fn, where μ is the coefficient of friction and Fn is the normal force; Fs is the elastic deformation force, calculated by the formula Fs = E * δ, where E is the elastic modulus of the material and δ is the elastic deformation; Fc is the indentation force, calculated by the formula Fc = K * δ, where K is the indentation coefficient in fit measurement and δ is the indentation amount.

[0044] Substituting the values, the maximum assembly press-in preload is calculated to be approximately 38.6 kN.

[0045] The maximum radial circumferential pressure is approximately 120 kN.

[0046] The electric hydraulic pump 3 is designed with a pressure of 50MPa and can be steplessly adjusted from 5 to 50MPa. A pipeline 12 is connected from the outlet of the electric hydraulic pump 3 as an oil film supply pipeline. This oil supply is controlled separately from the oil supply pipeline of the hydraulic jack 6. When removing the bearing 2, the bearing retainer 7 is installed on the outer ring of the bearing 2 and then hoisted onto the bearing retainer fixing platform 16. The hydraulic hose 4 is connected to the shaft end connection hole. The hydraulic jack 6 is installed on the hydraulic jack fixing platform 14. The hydraulic jack rod 13 is pushed out and placed on the jack head 15, and then pushed out to the bearing 2 shaft end position. The hydraulic jack 6 pressure is pushed up to 5MPa. The hydraulic oil film pressure is adjusted upward from 20MPa until the bearing 2 shows signs of loosening. The hydraulic jack 6 pressure is increased again until it is pushed out halfway. The oil film begins to seep out. The oil film hydraulic circuit is shut off. The hydraulic jack 6 is pushed out until the bearing 2 is completely removed.

[0047] When installing bearing 2, there is no need to connect the hydraulic oil film line. Simply apply oil to the shaft end and inner ring of bearing 2 and then use the hydraulic jack 6 to push it into the standard position.

[0048] The protective cover 8 is hinged to the side wall of the workbench 5. When the hydraulic jack 6 is operated, it forms an openable protective net to prevent the hydraulic jack 6 from being accidentally damaged or broken during operation, which could cause liquid or parts to splash out and injure people. This fully ensures the safety of the operators and makes the operation safer and more reliable.

Claims

1. A bearing assembly / disassembly device for a straightener roller system, comprising a bearing (2), characterized in that: Bearing (2) is fixedly connected to bearing retaining rings (7) at both ends. A fixing bolt (701) is fixedly connected to one side wall of the bearing retaining ring (7). The fixing bolt (701) passes through the bearing retaining ring fixing platform (16). The fixing bolt (701) is fixedly installed on the bearing retaining ring fixing platform (16) by nuts. The bearing retaining ring fixing platform (16) is fixedly installed on the surface of the workbench (5). A regulating control valve platform (11) is fixedly connected to the bottom surface of the bearing (2). Multiple pipelines (12) are fixedly connected to one side of the regulating control valve platform (11). An electric hydraulic pump (3) is fixedly connected to the other side of the regulating control valve platform (11). The electric hydraulic pump (3) is fixedly connected to the motor (9). The motor (9) is fixedly connected to the plunger pump (10). A roller (1) is fixedly connected to the side wall of the bearing (2). A hydraulic jack (6) is fixedly installed on the surface of the workbench (5).

2. The straightener roller bearing disassembly and assembly device as described in claim 1, characterized in that: The hydraulic jack (6) is fixedly installed on the surface of the hydraulic jack fixing platform (14), and the hydraulic jack fixing platform (14) is fixedly installed on the surface of the workbench (5).

3. The straightener roller bearing disassembly and assembly device as described in claim 2, characterized in that: The hydraulic jack (6) is fixedly connected to a hydraulic hose (4), and a jack rod (13) is fixedly connected to the end of the hydraulic jack (6). A jack head (15) is provided in front of the jack rod (13).

4. The bearing assembly / disassembly device as described in claim 3, characterized in that: The jack head (15) is a tubular structure, and the end of the jack head (15) is provided with a groove (1501).

5. The straightener roller bearing disassembly and assembly device as described in claim 4, characterized in that: The side wall of the workbench (5) is hinged with a protective cover (8).

6. The straightener roller bearing disassembly and assembly device as described in claim 5, characterized in that: The edge of the bearing retainer ring fixing platform (16) is flush with the edge of the worktable (5). There are two bearing retainer ring fixing platforms (16), which are symmetrically arranged along the center of the worktable (5).

7. The straightener roller bearing disassembly and assembly device as described in claim 6, characterized in that: The bearing retaining ring (7) consists of two half-rings (17) with teeth on the inner ring, and the two half-rings (17) are connected by threads.

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