Rotor turning platform for steam turbine maintenance

Abstract

The utility model relates to the technical field of steam turbine overhauls, especially to a rotor turnover platform for steam turbine overhauls, which comprises an adjusting base, and a horizontally arranged double-threaded rod is rotatably installed in the adjusting base. The double-threaded rod is provided with right-handed threads and left-handed threads at two ends. The right-handed threads and left-handed threads make the two threaded sleeves move towards or away from each other when the double-threaded rod rotates, thereby automatically adjusting the distance between the two turnover support platforms. The platform can be adapted to steam turbine rotors of different lengths and replace manual lifting, achieving automatic distance adjustment, improving the efficiency of overhauls, and reducing the labor intensity of operators. The platform has strong practicability and safety.

Description

Technical Field

[0001] This utility model relates to the field of steam turbine maintenance technology, and in particular to a rotor tilting table for steam turbine maintenance. Background Technology

[0002] The turbine rotor is one of the key components of a steam turbine rotor. It is the core component of the turbine rotor and is responsible for converting the energy of steam into mechanical energy. Steam turbine rotors are typically made of high-strength alloy steel and are quite heavy.

[0003] Currently, when overhauling a steam turbine rotor, the disassembled turbine rotor needs to be placed on a roller support. Existing roller supports are usually just fixed support frames with two sets of rollers at the top, with the two roller supports placed at both ends of the rotor. However, different steam turbine models have different rotor lengths, and the distance between the roller supports needs to be manually lifted and adjusted, which is inconvenient and affects maintenance efficiency. Utility Model Content

[0004] The purpose of this invention is to address the problem in the existing technology that different models of steam turbines have different rotor lengths, and the distance between roller supports needs to be manually lifted and adjusted, which is inconvenient and affects maintenance efficiency. This invention provides a rotor tilting table for steam turbine maintenance that solves the problems of inconvenient manual adjustment and difficult tilting of traditional roller supports. It can efficiently adapt to different rotor models, improve the automation and efficiency of steam turbine maintenance, and reduce the labor intensity of operators. It has strong practicality and safety.

[0005] To achieve the above objectives, this utility model provides a rotor tilting table for steam turbine maintenance, including an adjusting base. A horizontally arranged double-threaded rod is rotatably mounted inside the adjusting base. The outer surfaces of the double-threaded rod are respectively provided with a forward-rotating thread and a reverse-rotating thread. Threaded sleeves are threadedly mounted on the outer surfaces of the double-threaded rod at the positions of the forward-rotating thread and the reverse-rotating thread. A tilting support platform is fixedly mounted at the upper end of each threaded sleeve. A support roller is rotatably mounted on the top of the tilting support platform. The double-threaded rod is driven to rotate by a drive source.

[0006] As a further description of the above technical solution: the driving source is a first motor, and the output shaft of the first motor is fixedly connected to one end of the double threaded rod, and the other end of the double threaded rod is rotatably mounted on the vertical inner sidewall of one side of the adjusting base.

[0007] As a further description of the above technical solution: the middle of the outer surface of the double threaded rod is fixedly connected to a limit anti-detachment block on one side of the forward thread and the reverse thread, and the upper surface of the adjustment base is provided with an adjustment groove corresponding to the position of the double threaded rod.

[0008] As a further description of the above technical solution: the bottom of the flip support platform is provided with grooves on the front and rear sides, and a pulley group is rotatably installed inside the groove, and the lower surface of the pulley group is in contact with the upper surface of the adjustment base.

[0009] As a further description of the above technical solution: the pulley group includes multiple movable pulleys, which are rotatably mounted on the flip support platform via a rotating shaft.

[0010] As a further description of the above technical solution: each of the flipping support platforms is provided with two support rollers, and a driven rotating rod is fixedly connected to the inner surface of each of the two support rollers. A driven gear is fixedly connected to the same side surface of each of the two driven rotating rods. The same driving gear meshes between the two driven gears. A driving rotating rod is fixedly connected to the inner surface of the driving gear. One end of the driving rotating rod is connected to the output shaft of the second motor. The second motor is installed on the outer side of the flipping support platform.

[0011] As a further description of the above technical solution: the lower end of each threaded sleeve is slidably mounted on the adjusting base via a limiting slider.

[0012] The above technical solution has the following advantages or beneficial effects:

[0013] This invention features a double-threaded rod with a forward-rotating thread and a reverse-rotating thread at both ends. These threads allow the threaded sleeves on both sides to move in opposite directions as the double-threaded rod rotates, automatically adjusting the distance between the two rotating support platforms. This design is adaptable to turbine rotors of different lengths, replacing manual lifting and automating the spacing adjustment, thus improving maintenance efficiency. Through the automated adjustment of the double-threaded rod and the gear-driven rotating mechanism, the invention solves the problems of inconvenient manual adjustment and difficult rotation of traditional roller supports. It can efficiently adapt to different rotor models, improving the automation and efficiency of turbine maintenance while reducing the labor intensity of operators. It possesses strong practicality and safety. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the tilting table in one embodiment of the present invention;

[0015] Figure 2 This is a top view of the tilting table in one embodiment of the present invention.

[0016] Legend:

[0017] 1. Adjusting base; 2. Double threaded rod; 3. Forward thread; 4. Reverse thread; 5. Threaded sleeve; 6. Tilting support platform; 7. Support roller; 8. Limiting slider; 9. First motor; 10. Limiting anti-detachment block; 11. Adjusting groove; 12. Driven rotating rod; 13. Driven gear; 14. Drive gear; 15. Drive rotating rod; 16. Second motor; 17. Groove; 18. Pulley block. 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] In the description of this utility model, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] like Figure 1-2 As shown, a rotor tilting table for turbine maintenance according to this utility model includes an adjusting base 1. A horizontally arranged double-threaded rod 2 is rotatably installed inside the adjusting base 1. The outer surfaces of the double-threaded rod 2 are respectively provided with a forward thread 3 and a reverse thread 4. Threaded sleeves 5 are threadedly installed on the outer surfaces of the double-threaded rod 2 at the positions of the forward thread 3 and the reverse thread 4. A tilting support table 6 is fixedly installed at the upper end of each threaded sleeve 5. A support roller 7 is rotatably installed on the top of the tilting support table 6. The double-threaded rod 2 is driven to rotate by a drive source.

[0022] In the technical solution of this utility model, a double-threaded rod 2 has a forward-rotating thread 3 and a reverse-rotating thread 4 at both ends. The forward-rotating thread 3 and the reverse-rotating thread 4 cause the threaded sleeves 5 on both sides to move towards or away from each other when the double-threaded rod rotates, thereby automatically adjusting the distance between the two flip-up support platforms 6. This can adapt to turbine rotors of different lengths, replacing manual lifting and achieving automated distance adjustment, thus improving maintenance efficiency. The threaded sleeves 5 move axially with the rotation of the double-threaded rod 2, driving the flip-up support platforms 6 to move synchronously, achieving distance adjustment. Through the automated adjustment of the double-threaded rod, the problems of inconvenience in manual adjustment and difficulty in flipping of traditional roller supports are solved. It can efficiently adapt to different types of rotors, improve the automation and efficiency of turbine maintenance, and reduce the labor intensity of operators, demonstrating strong practicality and safety.

[0023] Each threaded sleeve 5 has its lower end slidably mounted on the adjusting base 1 via a limiting slider 8. The cooperation between the limiting slider 8 and the adjusting base 1 restricts the rotation of the threaded sleeve 5, allowing it to move only along the axial direction of the double threaded rod.

[0024] Specifically, the driving source is the first motor 9, and the output shaft of the first motor 9 is fixedly connected to one end of the double threaded rod 2, while the other end of the double threaded rod 2 is rotatably mounted on the vertical inner side wall of one side of the adjusting base 1.

[0025] like Figure 1 As shown, the middle of the outer surface of the double threaded rod 2, located on one side of the forward thread 3 and the reverse thread 4, is fixedly connected with a limiting anti-detachment block 10. The upper surface of the adjusting base 1 is provided with an adjusting groove 11 corresponding to the position of the double threaded rod 2. By fixing the limiting anti-detachment block 10 in the middle of the double threaded rod 2, located on one side of the forward thread 3 and the reverse thread 4, it can prevent the threaded sleeve 5 from moving excessively to both ends of the double threaded rod during the adjustment process, avoid the threaded sleeve from detaching from the threaded rod and causing device failure, and ensure the safety and reliability of the adjusting mechanism.

[0026] The adjusting groove 11 provides guidance for the movement of the tilting support 6, ensuring that it moves linearly along the axial direction of the double threaded rod 2.

[0027] like Figure 1 As shown, grooves 17 are provided on the front and rear sides of the bottom of the flip support platform 6. A pulley group 18 is rotatably installed inside the groove 17, and the lower surface of the pulley group 18 is in contact with the upper surface of the adjusting base 1. The pulley group 18 installed in the groove 17 at the bottom of the flip support platform 6 contains multiple movable pulleys. The lower surface of the pulleys is in contact with the upper surface of the adjusting base 1, which can reduce the moving resistance. The sliding friction between the flip support platform 6 and the adjusting base 1 is converted into rolling friction by the pulley group 18, so that the flip support platform 6 moves more smoothly with the threaded sleeve 5 and the adjustment energy consumption is reduced.

[0028] The pulley block 18 includes multiple movable pulleys, which are rotatably mounted on the tilting support platform 6 via a rotating shaft. The multiple pulleys are evenly distributed to support the weight of the tilting support platform 6, preventing tilting caused by the shift of the center of gravity during movement and ensuring the stability of the adjustment process.

[0029] like Figure 1 and Figure 2 As shown, each tilting support platform 6 is equipped with two support rollers 7. The inner surfaces of the two support rollers 7 are fixedly connected to driven rotating rods 12. The same side surface of the two driven rotating rods 12 is fixedly connected to driven gears 13. The same drive gear 14 meshes between the two driven gears 13. The inner surface of the drive gear 14 is fixedly connected to a drive rotating rod 15. One end of the drive rotating rod 15 is connected to the output shaft of the second motor 16. The second motor 16 is installed on the outer side of the tilting support platform 6. The second motor 16 drives the drive gear 14 to rotate, and through meshing transmission, drives the driven gears 13 and driven rotating rods 12 on both sides to rotate, realizing the synchronous rotation of the support rollers 7. The rotation of the support rollers 7 drives the turbine rotor to roll, eliminating the need for manual tilting, reducing labor intensity, improving maintenance safety, and ensuring that the rotation speed of the rollers on both sides is consistent, avoiding skewness when the rotor is tilted.

[0030] The arc surface of the support roller 7 contacts the outer surface of the turbine rotor, providing a stable support point and reducing frictional damage when the rotor is placed. The driven rod 12 can drive the support roller 7 to rotate, and with the transmission of the drive gear 14, the rotor rolls on the roller, which makes it easy to flip the rotor and adjust the maintenance angle during maintenance.

[0031] Working Principle: The first motor 9 is started, driving the double-threaded rod 2 to rotate. The forward-rotating thread 3 and the reverse-rotating thread 4 cause the threaded sleeves 5 on both sides to move synchronously towards or away from each other, driving the tilting support platform 6 to move along the adjusting groove 11 until the spacing of the support rollers 7 matches the length of the turbine rotor. The rotor is then placed on the support rollers 7 on both sides. The support rollers 7 support the rotor weight through their arc surfaces. The pulley block 18 and the limiting slider 8 ensure the stability of the support platform. The second motor 16 is started, driving the drive gear 14 to rotate. This drives the support rollers 7 to rotate through the driven gear 13. The friction of the rollers causes the rotor to roll, achieving rotor tilting, facilitating multi-angle operations for maintenance personnel. Through the automated adjustment of the double-threaded rod and the gear-driven tilting mechanism, the problems of inconvenient manual adjustment and difficult tilting of traditional roller supports are solved. It can efficiently adapt to different rotor models, improving the automation and efficiency of turbine maintenance while reducing the labor intensity of operators, demonstrating strong practicality and safety.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A rotor tilting table for steam turbine maintenance, characterized in that, The system includes an adjustment base (1), on which a horizontally arranged double-threaded rod (2) is rotatably mounted. The outer surfaces of the double-threaded rod (2) are respectively provided with a forward thread (3) and a reverse thread (4). Threaded sleeves (5) are threadedly mounted on the outer surfaces of the double-threaded rod (2) at the positions of the forward thread (3) and the reverse thread (4). A flip support platform (6) is fixedly mounted on the upper end of each threaded sleeve (5). A support roller (7) is rotatably mounted on the top of the flip support platform (6). The double-threaded rod (2) is driven to rotate by a drive source.

2. The rotor tilting table for turbine maintenance according to claim 1, characterized in that: The driving source is a first motor (9), and the output shaft of the first motor (9) is fixedly connected to one end of the double threaded rod (2), and the other end of the double threaded rod (2) is rotatably mounted on the vertical inner side wall of one side of the adjusting base (1).

3. The rotor tilting table for turbine maintenance according to claim 1, characterized in that: The middle part of the outer surface of the double threaded rod (2) is fixedly connected to a limit anti-detachment block (10) on one side of the forward thread (3) and the reverse thread (4). The upper surface of the adjusting base (1) is provided with an adjusting groove (11) corresponding to the position of the double threaded rod (2).

4. The rotor tilting table for turbine maintenance according to claim 1, characterized in that: The bottom of the flip support platform (6) is provided with grooves (17) on the front and rear sides. A pulley group (18) is rotatably installed inside the groove (17), and the lower surface of the pulley group (18) is in contact with the upper surface of the adjusting base (1).

5. The rotor tilting table for turbine maintenance according to claim 4, characterized in that: The pulley assembly (18) includes multiple movable pulleys, which are rotatably mounted on the tilting support platform (6) via a rotating shaft.

6. The rotor tilting table for turbine maintenance according to claim 1, characterized in that: Each of the flipping support platforms (6) is provided with two support rollers (7). The inner surfaces of the two support rollers (7) are fixedly connected with driven rotating rods (12). The same side surface of the two driven rotating rods (12) is fixedly connected with driven gears (13). The two driven gears (13) are meshed with the same driving gear (14). The inner surface of the driving gear (14) is fixedly connected with a driving rotating rod (15). One end of the driving rotating rod (15) is connected to the output shaft of the second motor (16). The second motor (16) is installed on the outer side of the flipping support platform (6).

7. The rotor tilting table for turbine maintenance according to claim 1, characterized in that: The lower end of each of the threaded sleeves (5) is slidably mounted on the adjusting base (1) via a limiting slider (8).

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