A steam turbine blade welding mechanism

Abstract

This utility model discloses a turbine blade welding mechanism, applied in the field of welding equipment technology. It includes a base, a robotic arm fixedly connected to the top of the base, a welding head mounted on the end joint of the robotic arm, a mounting frame on the top of the base, and symmetrically fitted clamping frames on the surface of the mounting frame. The clamping frames have symmetrically arranged clamping cavities inside, and symmetrically arranged air cushions communicating with the clamping cavities inside the clamping frames. An air supply sleeve slidably connected to the clamping frame is connected to the top of the clamping cavities. This utility model utilizes the clamping cavities installed inside the clamping frames, with air cushions connected to the top of the cavities. When the adjusting bolt is rotated, the distance between the two clamping cavities can be shortened, allowing them to clamp onto the surface of the turbine blade. A piston mechanism then inflates the air cushions, enabling them to adaptively adjust according to the blade shape and surface contour, better conforming to the blade, increasing the contact area, and enhancing clamping stability.

Description

Technical Field

[0001] This utility model belongs to the field of welding equipment technology, and specifically relates to a steam turbine blade welding mechanism. Background Technology

[0002] Steam turbine blades may develop problems such as cracks, gaps, dents, or breaks during operation. If these problems are not addressed in time, they can affect the efficiency of the steam turbine and even lead to accidents. Welding repair can avoid the rotor having to be sent back to the factory for maintenance, saving repair time and costs and ensuring the safe operation of the unit.

[0003] Welding equipment is required for the welding and maintenance of turbine blades. This equipment needs to use clamps to hold the blades during welding. Traditional welding clamps have a fixed structure and can hold the blade surface by bolts driving a locking block. However, turbine blades have a certain tilt angle, and traditional clamps cannot fully adapt to this angle, resulting in insufficient stability during clamping and affecting operational accuracy and safety. Furthermore, the distance between the two clamps in traditional clamps is fixed, and since different turbine blades have different lengths, these clamps are not suitable for clamping turbine blades of different sizes, indicating poor applicability. Utility Model Content

[0004] The purpose of this utility model is to provide a turbine blade welding mechanism, which has the advantages of strong stability and applicability to clamp turbine blades of different sizes.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a turbine blade welding mechanism, including a base, a mechanical arm fixedly connected to the top of the base, a welding head assembled at the end joint of the mechanical arm, a mounting frame provided on the top of the base, a positioning frame symmetrically sleeved on the surface of the mounting frame, a positioning cavity symmetrically arranged inside the positioning frame, an air cushion communicating with the positioning cavity symmetrically arranged inside the positioning frame, an air supply sleeve slidably connected to the top of the positioning cavity, a piston mechanism provided inside the air supply sleeve, a connecting block fixedly connected to the positioning frame, a bidirectional threaded rod threaded between two connecting blocks, and a fixing block symmetrically bolted to the mounting frame and rotatably connected to the bidirectional threaded rod.

[0006] The above technical solution is as follows: This utility model has a clamping cavity installed inside the clamping frame, and an air cushion is connected to the clamping cavity. When the adjusting bolt is rotated, the distance between the two clamping cavities can be shortened, allowing it to clamp onto the surface of the turbine blade. Then, the air cushion is inflated by a piston mechanism, so that the inflated air cushion can adaptively adjust according to the shape and surface contour of the blade, better fit the blade, increase the contact area, and enhance the clamping stability. By installing a bidirectional threaded rod on the mounting frame, when the bidirectional threaded rod is rotated, the distance between the two clamping frames can be adjusted under the action of the connecting block, so that it can be used to clamp turbine blades of different lengths, improving the applicability of the clamp of this welding device.

[0007] The present invention is further configured such that the piston mechanism includes a piston block, the piston block is disposed inside the air supply sleeve and is slidably connected to the inner wall of the air supply sleeve, and the top of the piston block is rotatably connected to an air supply screw threadedly connected to the air supply sleeve.

[0008] The above technical solution is adopted: when the air supply screw is rotated, the piston block can be moved inside the air supply sleeve. When the piston block moves to the bottom of the air supply sleeve, the gas inside the air supply sleeve will enter the air cushion through the clamping cavity to inflate the air cushion.

[0009] The present invention is further configured such that a sliding block is assembled inside the card holder and at the fitting point with the mounting bracket, and a sliding groove is provided on the mounting bracket to slide in connection with the sliding block.

[0010] The above technical solution is adopted: when the positioning frame moves on the mounting frame, it is subject to sliding limit.

[0011] The present invention is further configured such that both ends of the mounting bracket are rotatably connected to support plates via rotating shafts, and the support plates are fixedly connected to the base.

[0012] The above technical solution involves providing a rotating support for the mounting frame.

[0013] The present invention is further configured such that a servo motor is provided on the top of the base, the servo motor is fixedly connected to the support plate, and the output end of the servo motor is bolted to the rotating shaft of the mounting bracket.

[0014] Using the above technical solution: when the servo motor starts, the mounting frame can be rotated by the rotating shaft that is rotatably connected to the support plate, thereby achieving the purpose of adjusting the turbine blade angle.

[0015] The present invention is further configured such that the top and bottom of the card holder are threadedly connected with adjusting bolts, and the adjusting bolts are rotatably connected to the card cavity.

[0016] The above technical solution facilitates the vertical adjustment of the drive cavity.

[0017] The present invention is further configured such that the air cushion is made of silicone rubber.

[0018] The above technical solution improves the high-temperature resistance of the air cushion.

[0019] In summary, this utility model has the following beneficial effects:

[0020] 1. This utility model has a clamping cavity installed inside the clamping frame, and an air cushion is connected to the clamping cavity. When the adjusting bolt is rotated, the distance between the two clamping cavities can be shortened, so that it is clamped on the surface of the turbine blade. Then, the piston mechanism inflates the air cushion, so that the air cushion can adaptively adjust according to the shape and surface contour of the blade after inflation, better fit the blade, increase the contact area, and enhance the clamping stability.

[0021] 2. This utility model has a bidirectional threaded rod installed on the mounting frame. When the bidirectional threaded rod is rotated, the distance between the two clamping frames can be adjusted under the action of the connecting block, so that it can be used to clamp turbine blades of different lengths, thereby improving the applicability of the clamps of this welding device. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is the utility model Figure 1 Enlarged view of point A in the middle;

[0024] Figure 3 This is a partial sectional view of the structure of this utility model.

[0025] Reference numerals: 1. Base; 2. Robotic arm; 3. Welding head; 4. Mounting bracket; 5. Clamping bracket; 6. Clamping cavity; 7. Air cushion; 8. Air supply sleeve; 9. Piston mechanism; 91. Piston block; 92. Air supply screw; 10. Connecting block; 11. Bidirectional threaded rod; 12. Fixing block; 13. Sliding block; 14. Sliding groove; 15. Support plate; 16. Servo motor; 17. Adjusting bolt. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings.

[0027] Example 1:

[0028] refer to Figure 1 , Figure 2 and Figure 3A turbine blade welding mechanism includes a base 1, a robotic arm 2 fixedly connected to the top of the base 1, a welding head 3 mounted on the end joint of the robotic arm 2, a mounting frame 4 on the top of the base 1, and support plates 15 rotatably connected to both ends of the mounting frame 4 via rotating shafts. The support plates 15 are fixedly connected to the base 1, providing rotational support for the mounting frame 4. A servo motor 16 is fixedly connected to the support plates 15, and its output end is bolted to the rotating shaft of the mounting frame 4. When the servo motor 16 is started, it drives the mounting frame 4 to rotate via the rotating shaft rotatably connected to the support plates 15, thereby adjusting the turbine blade angle. A locking frame 5 is symmetrically fitted onto the surface of the mounting frame 4, and a locking cavity 6 is symmetrically arranged inside the locking frame 5. Adjusting bolts 17 are threadedly connected to the top and bottom of the locking frame 5, and the adjusting bolts 17 are connected to the locking cavities 6. The cavity 6 is rotatably connected, and the adjusting bolt 17 facilitates the vertical adjustment of the cavity 6. The cavity 6 is symmetrically arranged with air cushions 7 communicating with the cavity 6 inside the positioning frame 5. The air cushions 7 are made of silicone rubber, which improves their high temperature resistance. The top of the cavity 6 is connected to an air supply sleeve 8 that is slidably connected to the positioning frame 5. The air supply sleeve 8 is equipped with a piston mechanism 9 inside, which includes a piston block 91. The piston block 91 is located inside the air supply sleeve 8 and is slidably connected to the inner wall of the air supply sleeve 8. The top of the piston block 91 is rotatably connected to an air supply screw 92 that is threadedly connected to the air supply sleeve 8. By setting the piston block 91 and the air supply screw 92, when the air supply screw 92 is rotated, the piston block 91 can be moved inside the air supply sleeve 8. When the piston block 91 moves to the bottom of the air supply sleeve 8, the gas inside the air supply sleeve 8 will enter the air cushion 7 through the cavity 6 to inflate the air cushion 7.

[0029] Brief description of the usage process: When the turbine blade needs to be welded, place it between the two clamping brackets 5 and rotate the adjusting bolt 17 to drive the clamping cavity 6 to adjust its position up and down. When the adjusting bolt 17 is rotated, the distance between the two clamping cavities 6 can be shortened, so that it is clamped on the surface of the turbine blade. Then, the piston mechanism 9 inflates the air cushion 7. After the air cushion 7 is inflated, it can adaptively adjust according to the shape and surface contour of the blade, better fit the blade, increase the contact area, and enhance the clamping stability.

[0030] Example 2:

[0031] refer to Figure 1 and Figure 2A turbine blade welding mechanism includes a base 1, a robotic arm 2 fixedly connected to the top of the base 1, a welding head 3 assembled at the end joint of the robotic arm 2, a mounting frame 4 provided on the top of the base 1, a positioning frame 5 symmetrically fitted on the surface of the mounting frame 4, a sliding block 13 assembled inside the positioning frame 5 at the fitting point with the mounting frame 4, a sliding groove 14 slidably connected to the sliding block 13 on the mounting frame 4, and a sliding limit is provided by setting the sliding block 13 and the sliding groove 14, so that the positioning frame 5 is slidably limited when moving on the mounting frame 4, a positioning cavity 6 symmetrically arranged inside the positioning frame 5, an air cushion 7 symmetrically arranged inside the positioning frame 5 communicating with the positioning cavity 6, an air supply sleeve 8 slidably connected to the top of the positioning cavity 6 communicating with the positioning frame 5, a piston mechanism 9 provided inside the air supply sleeve 8, a connecting block 10 fixedly connected to the positioning frame 5, a bidirectional threaded rod 11 threadedly connected between the two connecting blocks 10, and a fixing block 12 symmetrically bolted to the mounting frame 4 and rotatably connected to the bidirectional threaded rod 11.

[0032] Brief description of the usage process: By installing a bidirectional threaded rod 11 on the mounting bracket 4, when the bidirectional threaded rod 11 is rotated, the distance between the two clamping brackets 5 can be adjusted under the action of the connecting block 10, so that it can be used to clamp turbine blades of different lengths, thereby improving the applicability of the clamps of this welding device.

[0033] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A turbine blade welding mechanism, comprising a base (1), characterized in that: A robotic arm (2) is fixedly connected to the top of the base (1). A welding head (3) is assembled at the end joint of the robotic arm (2). A mounting frame (4) is provided on the top of the base (1). A positioning frame (5) is symmetrically fitted on the surface of the mounting frame (4). A positioning cavity (6) is symmetrically arranged inside the positioning frame (5). An air cushion (7) communicating with the positioning cavity (6) is symmetrically arranged inside the positioning frame (5). An air supply sleeve (8) slidably connected to the positioning frame (5) is connected to the top of the positioning cavity (6). A piston mechanism (9) is provided inside the air supply sleeve (8). A connecting block (10) is fixedly connected to the positioning frame (5). A two-way threaded rod (11) is threaded between the two connecting blocks (10). A fixing block (12) rotatably connected to the two-way threaded rod (11) is symmetrically bolted to the mounting frame (4).

2. The turbine blade welding mechanism according to claim 1, characterized in that: The piston mechanism (9) includes a piston block (91), which is disposed inside the air supply sleeve (8) and slidably connected to the inner wall of the air supply sleeve (8). The top of the piston block (91) is rotatably connected to an air supply screw (92) that is threadedly connected to the air supply sleeve (8).

3. The turbine blade welding mechanism according to claim 1, characterized in that: The slotting frame (5) is equipped with a sliding block (13) inside and at the fitting point with the mounting frame (4), and the mounting frame (4) is provided with a sliding groove (14) that is slidably connected to the sliding block (13).

4. The turbine blade welding mechanism according to claim 1, characterized in that: Both ends of the mounting bracket (4) are rotatably connected to support plates (15) via rotating shafts, and the support plates (15) are fixedly connected to the base (1).

5. The turbine blade welding mechanism according to claim 1, characterized in that: A servo motor (16) is provided on the top of the base (1). The servo motor (16) is fixedly connected to the support plate (15). The output end of the servo motor (16) is bolted to the shaft of the mounting bracket (4).

6. The turbine blade welding mechanism according to claim 1, characterized in that: The top and bottom of the card holder (5) are threaded with adjusting bolts (17), and the adjusting bolts (17) are rotatably connected to the card cavity (6).

7. The turbine blade welding mechanism according to claim 1, characterized in that: The air cushion (7) is made of silicone rubber.

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