A damping structure of a main drive shaft of a hot-rolling seamless steel pipe rolling mill

Abstract

This utility model relates to the technical field of main drive shafts for hot-rolled seamless steel pipe mills, and discloses a vibration damping structure for the main drive shaft of a hot-rolled seamless steel pipe mill. The structure includes a base, a journal at the top of the base, a bearing seat at the top of the base, a shaft head fixedly connected to one end of the journal, the outer wall of the shaft head being disposed inside the bearing seat, and a vibration damping assembly at the bottom of the bearing seat. The vibration damping assembly includes a mounting seat and a sliding plate, with the mounting seat disposed at the top of the base. In this utility model, when the bearing seat is subjected to vibration, it transmits the vibration to the sliding plate, causing it to slide within the mounting seat. At this time, the damper dissipates the vibration energy through damping force, and the spring absorbs the vibration impact through elastic deformation. The combined effect of these two components effectively attenuates the vibration amplitude, solving the problems of increased equipment wear and decreased steel pipe rolling accuracy caused by vibration in the main drive shaft of the hot-rolled seamless steel pipe mill, and improving the operational stability of the mill's transmission system.

Description

Technical Field

[0001] This utility model relates to the technical field of main drive shafts for hot-rolled seamless steel pipe mills, and in particular to a vibration reduction structure for the main drive shaft of a hot-rolled seamless steel pipe mill. Background Technology

[0002] As a core component of the rolling system, the main drive shaft of a hot-rolled seamless steel pipe mill is subjected to high-intensity alternating loads and impact vibrations over a long period of time. Its operational stability is directly related to the rolling accuracy of the steel pipe and the service life of the equipment. During the hot rolling process, the main drive shaft of the mill is prone to severe vibration due to high-speed rotation and load changes. This not only causes fatigue in the transmission system structure but also leads to loosening of the connection between the bearing housing and the mill stand, exacerbating equipment wear. Traditional vibration reduction structures are difficult to effectively suppress such high-frequency vibrations. A new vibration reduction technology is needed to improve the dynamic performance of the main drive shaft, reduce the negative impact of vibration on the rolling process, and thus improve the overall reliability and production efficiency of the mill.

[0003] In the existing technology, the main drive shaft of hot-rolled seamless steel pipe mills usually adopts a rigid bearing housing combined with a common spring vibration damper. Its structure mainly uses bolts to fix the bearing housing to the frame, and utilizes the linear elastic deformation of the spring to absorb part of the vibration energy. Some improved solutions will add a rubber pad layer to the bottom of the bearing housing. In practical applications, it is mostly limited to a single vibration damping element and lacks a multi-stage energy dissipation mechanism, resulting in limited vibration damping efficiency.

[0004] The main problem with existing technologies is that the vibration damping structure is not effective in suppressing high-frequency vibrations, resulting in the inability to effectively dissipate the vibration energy of the main drive shaft. Under long-term operation, excessive vibration amplitude will accelerate the wear of the bearing housing and the mating surface of the drive shaft, and at the same time cause the mill stand to resonate, thereby reducing the dimensional accuracy of steel pipe rolling. Especially under high-load rolling conditions, traditional vibration damping structures are difficult to balance the rigidity and damping requirements, ultimately causing a chain reaction of problems such as shortened equipment maintenance cycle and decreased rolling product qualification rate, which seriously restricts the production efficiency of the mill. To address these issues, a vibration damping structure for the main drive shaft of a hot-rolled seamless steel pipe mill is proposed. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a vibration reduction structure for the main drive shaft of a hot-rolled seamless steel pipe mill, which aims to improve the problems of increased equipment wear and decreased steel pipe rolling accuracy caused by vibration in the main drive shaft of a hot-rolled seamless steel pipe mill in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a vibration reduction structure for the main drive shaft of a hot-rolled seamless steel pipe mill, comprising a base, a journal provided on the top of the base, a bearing seat provided on the top of the base, a shaft head fixedly connected to one end of the journal, the outer wall of the shaft head being disposed inside the bearing seat, and a vibration reduction component provided at the bottom of the bearing seat; The vibration damping assembly includes a mounting base and a sliding plate. The mounting base is disposed on the top of the base. The outer wall of the sliding plate is slidably connected to the inside of the mounting base. The top of the sliding plate is fixedly connected to the bottom of the bearing seat. A damper is fixedly connected inside the mounting base. The output end of the damper is fixedly connected to the bottom of the sliding plate. A fixed cylinder is fixedly connected inside the mounting base. A spring is disposed inside the fixed cylinder. One end of the spring is fixedly connected to the inside of the fixed cylinder, and the other end of the spring is fixedly connected to the bottom of the sliding plate. A connecting assembly is disposed at the bottom of the mounting base.

[0007] As a further description of the above technical solution: The connecting component includes a connecting block and a connecting groove formed inside the base. The top of the connecting block is fixedly connected to the bottom of the mounting base, and the connecting block and the connecting groove fit together.

[0008] As a further description of the above technical solution: A fixing block is fixedly connected to the outer wall of the mounting base, and a locking block is slidably connected inside the fixing block.

[0009] As a further description of the above technical solution: The side wall of the card block is fixedly connected to a limiting block, and the outer wall of the limiting block is slidably connected inside the fixed block.

[0010] As a further description of the above technical solution: The side wall of the limiting block is provided with a second spring, and both ends of the second spring are fixedly connected to the side wall of the limiting block.

[0011] As a further description of the above technical solution: A hollow block is fixedly connected to the top of the base, a push rod is slidably connected inside the hollow block, and the outer wall of the card block is slidably connected inside the hollow block.

[0012] As a further description of the above technical solution: One end of the push rod is fixedly connected to a sliding block, and the outer wall of the sliding block is slidably connected to the inside of the hollow block.

[0013] As a further description of the above technical solution: The outer wall of the push rod is provided with a limiting plate, and the outer wall of the limiting plate is slidably connected to the inside of the hollow block.

[0014] This utility model has the following beneficial effects: 1. In this utility model, after the bearing seat is subjected to vibration, the vibration is transmitted to the sliding plate, causing it to slide within the mounting seat. At this time, the damper consumes the vibration energy through damping force, and the spring absorbs the vibration impact through elastic deformation. The two work together to effectively attenuate the vibration amplitude, thereby achieving a significant vibration reduction and noise reduction effect. This solves the problem of increased equipment wear caused by vibration in the main drive shaft of the hot-rolled seamless steel pipe mill and the decrease in steel pipe rolling accuracy, and improves the operational stability of the mill transmission system.

[0015] 2. In this utility model, by pressing the push rods on both sides, the sliding block and the limiting plate are moved inside the hollow block. The sliding blocks on both sides squeeze the locking block, causing the limiting block to compress the second spring, thereby releasing the locking block from restricting the hollow block and realizing the quick disassembly of the bearing seat. This achieves the effect of convenient disassembly and assembly, solves the problem of cumbersome operation and long time consumption when disassembling traditional bearing seats, and improves the convenience of equipment maintenance and repair efficiency. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of a vibration reduction structure for the main drive shaft of a hot-rolled seamless steel pipe mill proposed in this utility model. Figure 2 This is a schematic diagram of the mounting base for a vibration damping structure of the main drive shaft of a hot-rolled seamless steel pipe mill, as proposed in this utility model. Figure 3 This is a schematic diagram of the connecting block of the vibration damping structure of the main drive shaft of a hot-rolled seamless steel pipe mill proposed in this utility model; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 for Figure 3 Enlarged view of point B in the middle.

[0017] Legend: 1. Base; 2. Journal; 3. Bearing seat; 4. Shaft head; 5. Mounting seat; 6. Sliding plate; 7. Damper; 8. Fixed cylinder; 9. Spring 1; 10. Connecting block; 11. Connecting groove; 12. Fixed block; 13. Locking block; 14. Limiting block; 15. Spring 2; 16. Hollow block; 17. Push rod; 18. Sliding block; 19. Limiting plate. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Reference Figure 1 and Figure 2 This utility model provides an embodiment of a vibration reduction structure for the main drive shaft of a hot-rolled seamless steel pipe mill, including a base 1. The base 1 serves as an integral support structure, providing a stable installation foundation for the system. A journal 2 is provided on the top of the base 1, which is used to support and position the main drive shaft. A bearing seat 3 is provided on the top of the base 1, which is used to install and fix the bearing. A shaft head 4 is fixedly connected to one end of the journal 2, which is used to connect the transmission components. The outer wall of the shaft head 4 is located inside the bearing seat 3 to realize the positioning and rotational support of the drive shaft. A vibration reduction component is provided at the bottom of the bearing seat 3 to absorb and buffer vibration energy. The vibration damping assembly includes a mounting base 5 and a sliding plate 6. The mounting base 5 is located on top of the base 1, providing installation space for the vibration damping mechanism. The outer wall of the sliding plate 6 is slidably connected to the inside of the mounting base 5, guiding the vertical movement of the bearing seat 3. The top of the sliding plate 6 is fixedly connected to the bottom of the bearing seat 3, transmitting vibration to the vibration damping assembly. A damper 7 is fixedly connected inside the mounting base 5. The damper 7 consumes vibration energy through the oil damping effect. The output end of the damper 7 is fixedly connected to the bottom of the sliding plate 6, directly acting on the vibration transmission component. A fixed cylinder 8 is fixedly connected inside the mounting base 5, providing installation space and protection for the spring. A spring 9 is installed inside the fixed cylinder 8. The spring 9 absorbs impact energy through elastic deformation. One end of the spring 9 is fixedly connected to the inside of the fixed cylinder 8, and the other end is fixedly connected to the bottom of the sliding plate 6, working in conjunction with the damper 7. A connecting assembly is provided at the bottom of the mounting base 5 for quick assembly and disassembly.

[0020] Reference Figures 3-5The connecting assembly includes a connecting block 10 and a connecting groove 11 formed inside the base 1. The top of the connecting block 10 is fixedly connected to the bottom of the mounting base 5. The connecting block 10 and the connecting groove 11 fit together to achieve initial positioning and load-bearing. A fixing block 12 is fixedly connected to the outer wall of the mounting base 5. The fixing block 12 provides the mounting base for the locking mechanism. A locking block 13 is slidably connected inside the fixing block 12. The locking block 13 realizes the mechanical locking function. A limit block 14 is fixedly connected to the side wall of the locking block 13. The limit block 14 restricts the movement stroke of the locking block 13. The outer wall of the limit block 14 is slidably connected inside the fixing block 12 to ensure movement stability. A second spring 15 is provided on the side wall of the limit block 14. The second spring 15 provides support for the locking block 13. The reset elastic force of spring 3 is such that both ends of spring 15 are fixedly connected to the side wall of limit block 14. A hollow block 16 is fixedly connected to the top of base 1. Hollow block 16 serves as the mounting housing for the unlocking mechanism. Push rod 17 is slidably connected inside hollow block 16. Push rod 17 is used for manual unlocking. The outer wall of the card block 13 is slidably connected to the inside of hollow block 16 to achieve linkage. One end of push rod 17 is fixedly connected to sliding block 18. Sliding block 18 transmits operating force. The outer wall of sliding block 18 is slidably connected to the inside of hollow block 16 to ensure movement accuracy. Limit plate 19 is provided on the outer wall of push rod 17. Limit plate 19 limits the pushing stroke. The outer wall of limit plate 19 is slidably connected to the inside of hollow block 16.

[0021] Working Principle: When the main drive shaft of the rolling mill vibrates during operation, the vibration energy is first transmitted to the bearing housing 3 through the shaft head 4. The bearing housing 3 then transmits the vibration to the sliding plate 6 fixedly connected to its bottom, causing the sliding plate 6 to slide vertically within the mounting base 5. At this time, the damper 7 converts the vibration kinetic energy into heat energy for dissipation. Simultaneously, the movement of the sliding plate 6 compresses or stretches the spring 9. The elastic deformation of the spring absorbs and stores some of the vibration energy, which is slowly released during the rebound process. The synergistic effect of the damper 7 and the spring 9 forms a dual vibration reduction mechanism, effectively attenuating the vibration amplitude. The fixed cylinder 8 not only protects the spring 9 but also limits the lateral deformation of the spring, ensuring the stability of the vibration reduction effect. Through combined vibration reduction, the vibration amplitude is reduced. This reduces the vibration energy transmitted to the base 1. When the bearing seat 3 needs to be disassembled for maintenance, the operator presses the push rods 17 on both sides at the same time. The push rods 17 drive the sliding block 18 to move inside the hollow block 16. The sliding block 18 pushes the locking block 13 to slide into the fixed block 12. The movement of the locking block 13 drives the limiting block 14 to compress the second spring 15, causing the locking block 13 to exit from the slot of the hollow block 16, releasing the lock on the mounting seat 5. At this time, the bearing seat 3 can be lifted upwards, and the connecting block 10 can be disengaged from the connecting groove 11, achieving quick disassembly. During installation, simply align the connecting block 10 with the connecting groove 11 and press it down. The locking block 13 will automatically reset and lock into the hollow block 16 under the elastic force of the second spring 15, completing the locking and improving maintenance efficiency.

[0022] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A damping structure of a main drive shaft of a hot-rolling seamless steel pipe rolling mill comprising a base (1), characterized in that: The base (1) is provided with a journal (2) at the top, and a bearing seat (3) is provided at the top of the base (1). One end of the journal (2) is fixedly connected to a shaft head (4). The outer wall of the shaft head (4) is provided inside the bearing seat (3). The bottom of the bearing seat (3) is provided with a vibration damping component. The vibration damping assembly includes a mounting base (5) and a sliding plate (6). The mounting base (5) is located on the top of the base (1). The outer wall of the sliding plate (6) is slidably connected to the inside of the mounting base (5). The top of the sliding plate (6) is fixedly connected to the bottom of the bearing seat (3). A damper (7) is fixedly connected inside the mounting base (5). The output end of the damper (7) is fixedly connected to the bottom of the sliding plate (6). A fixed cylinder (8) is fixedly connected inside the mounting base (5). A spring (9) is provided inside the fixed cylinder (8). One end of the spring (9) is fixedly connected inside the fixed cylinder (8), and the other end of the spring (9) is fixedly connected to the bottom of the sliding plate (6). A connecting assembly is provided at the bottom of the mounting base (5).

2. A damping structure of a main drive shaft of a hot rolling seamless steel pipe mill according to claim 1, characterized in that: The connecting component includes a connecting block (10) and a connecting groove (11) formed inside the base (1). The top of the connecting block (10) is fixedly connected to the bottom of the mounting base (5), and the connecting block (10) and the connecting groove (11) fit together.

3. The vibration reduction structure for the main drive shaft of a hot-rolled seamless steel pipe mill according to claim 1, characterized in that: The mounting base (5) is fixedly connected to a fixing block (12) on its outer wall, and a locking block (13) is slidably connected inside the fixing block (12).

4. A damping structure of a main drive shaft of a hot rolling seamless steel pipe mill according to claim 3, characterized in that: The side wall of the card block (13) is fixedly connected to the limiting block (14), and the outer wall of the limiting block (14) is slidably connected inside the fixed block (12).

5. A damping structure of a main drive shaft of a hot rolling seamless steel pipe rolling mill according to claim 4, characterized in that: The side wall of the limiting block (14) is provided with a second spring (15), and both ends of the second spring (15) are fixedly connected to the side wall of the limiting block (14).

6. The vibration damping structure for the main drive shaft of a hot-rolled seamless steel pipe mill according to claim 3, characterized in that: A hollow block (16) is fixedly connected to the top of the base (1), and a push rod (17) is slidably connected inside the hollow block (16). The outer wall of the card block (13) is slidably connected inside the hollow block (16).

7. The vibration damping structure for the main drive shaft of a hot-rolled seamless steel pipe mill according to claim 6, characterized in that: One end of the push rod (17) is fixedly connected to a sliding block (18), and the outer wall of the sliding block (18) is slidably connected to the inside of the hollow block (16).

8. The vibration damping structure for the main drive shaft of a hot-rolled seamless steel pipe mill according to claim 7, characterized in that: The outer wall of the push rod (17) is provided with a limiting plate (19), and the outer wall of the limiting plate (19) is slidably connected to the inside of the hollow block (16).

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