Hoisting auxiliary device for steam turbine installation

Abstract

The utility model provides a hoisting auxiliary device for installing a steam turbine, which comprises an auxiliary device and a rotor of the steam turbine, the rotor comprises a rotating shaft and a plurality of blade roots integrally formed with the rotating shaft, the plurality of blade roots are positioned in the center of the rotating shaft, the blade roots are arranged at equal intervals, and medium-pressure cylinder blades are arranged on the blade roots; the auxiliary device comprises a hoisting cross beam, a double-shaft motor is arranged in the center of the top of the hoisting cross beam, and driving mechanisms are connected to output shafts at the two ends of the double-shaft motor. The rope sleeve can be positioned without manually adjusting the position of the rope sleeve, and is more convenient and safer.

Description

Technical Field

[0001] This utility model relates to a hoisting auxiliary device for steam turbine installation, belonging to the technical field of steam turbine hoisting auxiliary devices. Background Technology

[0002] A steam turbine, also known as a steam engine, is a rotary steam power unit. High-temperature, high-pressure steam passes through fixed nozzles, becomes an accelerated airflow, and is then injected onto blades, causing a rotor equipped with rows of blades to rotate and perform work. Steam turbines are the main equipment in modern thermal power plants and are also used in the metallurgical industry, chemical industry, and ship propulsion systems. A steam turbine is a rotating machine that uses steam as power and converts the thermal energy of steam into mechanical work; it is the most widely used prime mover in modern thermal power plants. Steam turbines have advantages such as high single-unit power, high efficiency, and long service life. They are external combustion rotary machines that convert the thermal energy of steam into mechanical work. Steam from the boiler enters the turbine and passes through a series of annularly arranged nozzles and blades, converting the thermal energy of the steam into the mechanical energy of the turbine rotor's rotation. Steam undergoes energy conversion in different ways within a steam turbine, resulting in steam turbines with different operating principles. Steam turbines typically operate under high temperature, high pressure, and high speed conditions, making them relatively precise heavy machinery. They generally need to be integrated with a boiler (or other steam generator), generator (or other driven machinery), condenser, heater, pump, etc., to form a complete set of equipment that works in coordination. A steam turbine consists of two parts: rotating parts and stationary parts. The rotor includes the main shaft, impeller, moving blades, and couplings. The stator includes the steam inlet section, cylinder, diaphragms and stator blades, steam seals, and bearings.

[0003] The existing method for installing steam turbine rotors involves connecting a lifting beam to the bottom of a double-hook hoist on a lifting device (usually an overhead crane), and then placing a set of rope loops at the bottom of the lifting beam, which are then looped onto the rotor's shaft. Before lifting, the position of the rope loops on the shaft needs to be manually adjusted to ensure balance and prevent rotor instability. However, manually adjusting the position of the rope loops is cumbersome. Therefore, this invention proposes a lifting auxiliary device for steam turbine installation. Utility Model Content

[0004] Based on the above background, the purpose of this utility model is to provide a hoisting auxiliary device for steam turbine installation, thereby solving the problems in the background art.

[0005] This utility model provides the following technical solution:

[0006] A hoisting auxiliary device for steam turbine installation includes an auxiliary device and a turbine rotor. The rotor includes a shaft and a plurality of blade roots integrally formed with the shaft. The blade roots are located at the center of the shaft and are evenly spaced. Intermediate pressure cylinder blades are mounted on the blade roots. The auxiliary device includes a hoisting beam. A dual-shaft motor is located at the top center of the hoisting beam. Drive mechanisms are connected to the output shafts at both ends of the dual-shaft motor. Sliding grooves are provided on both sides of the dual-shaft motor on the hoisting beam. Connecting columns are slidably disposed within the sliding grooves. Connecting blocks are fixedly connected to the top of each connecting column, and the connecting blocks are threadedly connected to the drive mechanisms. Clamping mechanisms are provided at the bottom of each connecting column, clamping the shaft. An abutment plate is provided at the end of the clamping mechanism near the blade root on the shaft. The end face of the abutment plate away from the clamping mechanism abuts against the side of the blade root.

[0007] Preferably, the drive mechanism includes a coupling, a rotating rod, and a bearing housing. The coupling connects the rotating rod to the output shaft of the dual-axis motor, and the end of the rotating rod away from the dual-axis motor is rotatably connected to the bearing housing via a bearing.

[0008] Preferably, the rotating shaft is provided with a threaded portion at a position directly above the sliding groove, and the connecting block is provided with a threaded hole, which is threadedly connected to the threaded portion.

[0009] Preferably, the threaded sections on the rotating shafts of the dual-axis motor's two-end drive mechanisms have opposite thread directions.

[0010] Preferably, the clamping mechanism includes a limiting plate, which is fixedly connected to the bottom end face of the connecting column, and the limiting plate has first limiting holes on both sides of the connecting column.

[0011] Preferably, the clamping mechanism further includes a support block, a semi-circular groove is provided in the center of the top of the support block, an anti-slip pad is provided in the groove, and inverted L-shaped plates are provided on both sides of the top of the support block. A second limiting hole is provided on the L-shaped plate, and the bottom wall of the top surface of the L-shaped plate abuts against the top surface of the limiting plate.

[0012] Preferably, the first limiting hole and the second limiting hole are coaxially formed, and a limiting pin passes through the first limiting hole and the second limiting hole.

[0013] Preferably, the top of the hoisting beam is provided with a set of connecting parts.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] This utility model discloses a hoisting auxiliary device for turbine installation. By setting up a dual-shaft motor, the dual-shaft motor can drive the rotating shaft in the drive mechanism to rotate in the forward or reverse direction. When the rotating shaft rotates forward, the rotating shaft drive connection moves in opposite directions, thereby driving the connecting column to move in opposite directions. When the abutting plate on the clamping mechanism abuts against the blade root end face on the rotating shaft, the auxiliary device is located directly above the rotor. Then, by operating the clamping mechanism, the rotor's rotating shaft can be clamped in the clamping mechanism for hoisting, without the need for manual adjustment of the rope position for positioning, which is more convenient and safer. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 This is a utility model Figure 1 Enlarged schematic diagram of structure A in the middle;

[0019] Figure 3 This is a schematic diagram of the connecting column structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the support block structure of this utility model.

[0021] In the diagram: 1. Shaft; 2. Blade root; 3. Medium-pressure cylinder blade; 4. Dual-shaft motor; 5. Lifting beam; 6. Sliding groove; 7. Connecting column; 8. Connecting block; 9. Abutment plate; 10. Coupling; 11. Rotating rod; 12. Bearing seat; 13. Bearing; 14. Threaded part; 15. Threaded hole; 16. Limiting plate; 17. First limiting hole; 18. Support block; 19. Groove; 20. Anti-slip pad; 21. L-shaped plate; 22. Second limiting hole; 23. Limiting pin; 24. Connecting part. Detailed Implementation

[0022] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings. It should be understood that the implementation of this utility model is not limited to the following embodiments, and any modifications and / or alterations made to this utility model will fall within the protection scope of this utility model.

[0023] In this invention, unless otherwise specified, all parts and percentages are by weight, and the equipment and raw materials used are commercially available or commonly used in the field. Unless otherwise specified, the methods in the following embodiments are conventional methods in the field. Unless otherwise specified, the components or equipment in the following embodiments are general standard parts or components known to those skilled in the art, and their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0024] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the following detailed description, many specific details are set forth to facilitate explanation and provide a comprehensive understanding of the embodiments of the present invention. However, one or more embodiments may be practiced by those skilled in the art without these specific details.

[0025] like Figures 1-4 As shown, a hoisting auxiliary device for steam turbine installation includes an auxiliary device and a turbine rotor. The rotor includes a rotating shaft 1 and several blade roots 2 integrally formed with the rotating shaft 1. The blade roots 2 are located in the center of the rotating shaft 1 and are evenly spaced. Intermediate pressure cylinder blades 3 are installed on the blade roots 2. The auxiliary device includes a hoisting beam 5. A dual-shaft motor 4 is provided at the top center of the hoisting beam 5. A drive mechanism is connected to the output shafts at both ends of the dual-shaft motor 4. Sliding grooves 6 are provided on both sides of the dual-shaft motor 4 on the hoisting beam 5. Connecting columns 7 are slidably arranged in the sliding grooves 6. Connecting blocks 8 are fixedly connected to the top of the connecting columns 7. The connecting blocks 8 are threadedly connected to the drive mechanism. A clamping mechanism is provided at the bottom of the connecting columns 7. The clamping mechanism clamps on the rotating shaft 1. An abutment plate 9 is provided at the end of the clamping mechanism near the blade root 2 on the rotating shaft 1. The end face of the abutment plate 9 away from the clamping mechanism abuts against the side of the blade root 2.

[0026] In the above technical solution, this utility model sets up a dual-axis motor 4. The dual-axis motor 4 can drive the rotating shaft 1 in the drive mechanism to rotate forward or backward, whether it is forward or reverse. When the rotating shaft 1 rotates forward, the rotating shaft 1 drives the connecting column 7 to move in opposite directions, thereby driving the connecting column 7 to move in opposite directions. When the abutting plate 9 on the clamping mechanism abuts against the end face of the blade root 2 on the rotating shaft 1, the auxiliary device is located directly above the rotor. Then, by operating the clamping mechanism, the rotating shaft 1 of the rotor can be clamped in the clamping mechanism for hoisting. There is no need to manually adjust the position of the rope loop for positioning, which is more convenient and safer.

[0027] In this invention, the drive mechanism includes a coupling 10, a rotating rod 11, and a bearing housing 12. The coupling 10 connects the rotating rod 11 to the output shaft of the dual-axis motor 4. The end of the rotating rod 11 away from the dual-axis motor 4 is rotatably connected to the bearing housing 12 via a bearing 13. The rotating shaft 1 has a threaded portion 14 located directly above the sliding groove 6. The connecting block 8 has a threaded hole 15, which is threadedly connected to the threaded portion 14. The threaded portions 14 on the rotating shafts 1 of the drive mechanisms at both ends of the dual-axis motor 4 have opposite thread directions.

[0028] In the above technical solution, by setting a drive mechanism, the threaded connection between the threaded part 14 and the threaded hole 15 is used, and the dual-axis motor 4 is started by an external controller, which can drive the rotating rod 11 to rotate, thereby driving the connecting block 8 at the top of the connecting column 7 to move in opposite directions, which is convenient for positioning.

[0029] In this utility model, the clamping mechanism includes a limiting plate 16, which is fixedly connected to the bottom surface of the connecting column 7. First limiting holes 17 are provided on both sides of the connecting column 7 on the limiting plate 16. The clamping mechanism also includes a support block 18. A semi-circular groove 19 is provided at the center of the top of the support block 18, and an anti-slip pad 20 is provided inside the groove 19. Inverted L-shaped plates 21 are provided on both sides of the top of the support block 18, and second limiting holes 22 are provided on the L-shaped plates 21. The top and bottom walls of the L-shaped plates 21 abut against the top surface of the limiting plate 16. The first limiting holes 17 and the second limiting holes 22 are coaxially aligned, and limiting pins 23 pass through the first limiting holes 17 and the second limiting holes 22.

[0030] In the above technical solution, by setting up a clamping mechanism, after the lifting beam 5 moves down to the limit plate 16 and abuts against the rotor shaft 1, and the dual-axis motor 4 drives the drive mechanism to drive the abutment plate 9 to abut against the end face of the blade root 2, the groove 19 of the support block 18 abuts against the rotor shaft 1. By moving the position of the support block 18, the top and bottom walls of the L-shaped plate 21 are completely located on the top surface of the limit plate 16. At this time, the first limit hole 17 and the second limit hole 22 are coaxial. Finally, the limit pin 23 passes through the first limit hole 17 and the second limit hole 22, and the clamping mechanism can be completed.

[0031] In this invention, the top of the hoisting beam 5 is provided with a set of connecting parts 24. By providing connecting parts 24, a connecting steel cable can be connected to the double hook of the hoisting equipment, thereby connecting the auxiliary device to the hoisting equipment of the steam turbine.

[0032] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A hoisting auxiliary device for steam turbine installation, comprising the auxiliary device and the rotor of the steam turbine, characterized in that: The rotor includes a rotating shaft (1) and a plurality of blade roots (2) integrally formed with the rotating shaft (1). The plurality of blade roots (2) are located in the center of the rotating shaft (1) and are equally spaced apart. Medium pressure cylinder blades (3) are installed on the blade roots (2). The auxiliary device includes a hoisting beam (5), a dual-axis motor (4) is provided at the center of the top of the hoisting beam (5), and a drive mechanism is connected to the output shafts at both ends of the dual-axis motor (4). Sliding slots (6) are provided on both sides of the dual-axis motor (4) on the hoisting beam (5). Connecting columns (7) are slidably arranged in the sliding slots (6). Connecting blocks (8) are fixedly connected to the top of the connecting columns (7). The connecting blocks (8) are threadedly connected to the drive mechanism. Clamping mechanisms are provided at the bottom of the connecting columns (7). The clamping mechanisms are clamped on the rotating shaft (1). The clamping mechanism is provided with an abutment plate (9) at one end of the blade root (2) near the rotating shaft (1), and the end face of the abutment plate (9) away from the clamping mechanism abuts against the side of the blade root (2).

2. The hoisting auxiliary device for turbine installation according to claim 1, characterized in that: The drive mechanism includes a coupling (10), a rotating rod (11), and a bearing housing (12). The coupling (10) connects the rotating rod (11) to the output shaft of the dual-axis motor (4). The end of the rotating rod (11) away from the dual-axis motor (4) is rotatably connected to the bearing housing (12) through a bearing (13).

3. The hoisting auxiliary device for turbine installation according to claim 2, characterized in that: The rotating shaft (1) is provided with a threaded part (14) located at the position directly above the sliding through groove (6), and the connecting block (8) is provided with a threaded hole (15), which is threadedly connected to the threaded part (14).

4. The hoisting auxiliary device for turbine installation according to claim 3, characterized in that: The threaded parts (14) on the rotating shaft (1) of the driving mechanism at both ends of the dual-axis motor (4) have opposite thread directions.

5. The hoisting auxiliary device for turbine installation according to claim 4, characterized in that: The clamping mechanism includes a limiting plate (16), which is fixedly connected to the bottom surface of the connecting column (7). The limiting plate (16) has first limiting holes (17) on both sides of the connecting column (7).

6. The hoisting auxiliary device for turbine installation according to claim 5, characterized in that: The clamping mechanism also includes a support block (18), a semi-circular groove (19) is provided in the center of the top of the support block (18), an anti-slip pad (20) is provided in the groove (19), and inverted L-shaped plates (21) are provided on both sides of the top of the support block (18). A second limiting hole (22) is provided on the L-shaped plate (21), and the top and bottom walls of the L-shaped plate (21) abut against the top surface of the limiting plate (16).

7. The hoisting auxiliary device for turbine installation according to claim 6, characterized in that: The first limiting hole (17) and the second limiting hole (22) are coaxially opened, and a limiting pin (23) is inserted into the first limiting hole (17) and the second limiting hole (22).

8. The hoisting auxiliary device for turbine installation according to claim 1, characterized in that: The top of the hoisting beam (5) is provided with a set of connecting parts (24).

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