A kind of combustion engine flame tube transition section welding positioning fixture

Abstract

This utility model discloses a welding positioning fixture for the transition section of a gas turbine flame tube, belonging to the field of special welding forming. It includes a base plate with several threaded holes and cylindrical pin holes at its upper top. The threaded holes are assembled with the base plate using hexagonal cylindrical head bolts. A cylindrical pin is inserted into the cylindrical pin holes at the upper top of the base plate. A support is provided at the upper top of the base plate, and a reducer is connected to the upper top of the support. A bearing seat is assembled at the output end of the reducer through a perforated end cap. Through the coordinated use of these devices, this fixture, while meeting the assembly requirements of the flame tube transition section, controls the amount of welding deformation, simplifies machining processes, saves manufacturing time, and reduces costs. Simultaneously, in the flame tube transition section welding positioning fixture process, it facilitates assembly positioning and welding assembly, ensuring the assembly quality of the butt weld and the shape and position dimensions of each part during assembly.

Description

Technical Field

[0001] This utility model relates to the field of special welding forming technology, specifically a welding positioning fixture for the transition section of a gas turbine flame tube. Background Technology

[0002] The transition section of the flame tube is a crucial component in the gas turbine combustion chamber, located between the front end of the combustion chamber and the compressor outlet. Its function is to smoothly guide the high-pressure air discharged from the compressor into the combustion chamber, where it participates in the fuel mixing and combustion process. The transition section slows down and guides the high-speed turbulent airflow from the compressor outlet, creating a stable flow field and ensuring thorough mixing of fuel and air at the flame tube head.

[0003] Currently, the combustion chamber flame tube transition section structure assembly in the device requires individual welding to connect different cross-sections of the combustion chamber, facilitating the complex geometry of the transition from a cylindrical shape to a flame tube, while also considering aerodynamic and mechanical strength requirements. During the welding of the gas turbine flame tube transition section, the metal in the weld seam and the heated zone near the weld seam expands. Because the surrounding cooler metal prevents this expansion, compressive stress and plastic shrinkage deformation easily occur in the welding area, resulting in varying degrees of lateral and longitudinal shrinkage.

[0004] Therefore, this utility model provides a welding positioning fixture for the transition section of a gas turbine flame tube to solve the above problems. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] This utility model provides a welding positioning fixture for the transition section of a gas turbine flame tube, which aims to solve the problems mentioned in the background art.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A welding positioning fixture for the transition section of a gas turbine flame tube includes a base plate, the upper top of which is provided with a plurality of threaded holes and cylindrical pin holes.

[0010] The threaded hole is assembled to the base plate by a hexagonal cylindrical head bolt. A cylindrical pin is inserted into the cylindrical pin hole at the top of the base plate. A support is provided at the top of the base plate. A reducer is connected to the top of the support. A bearing seat is assembled at the output end of the reducer through a perforated end cap. A positioning angle seat is connected to the inside of the bearing seat through a drive shaft. A stepped screw is connected to the end of the positioning angle seat through a centering pin. An A bolt is provided inside the centering pin.

[0011] As a preferred technical solution of this application, the outer wall of the positioning angle seat is provided with a positioning plate, the end of the positioning plate is threadedly connected to a conformal pressure plate by an A internal hex bolt, and the middle of the conformal pressure plate is connected to a B shaft.

[0012] As a preferred technical solution of this application, a positioning shaft seat is provided at the top of the base plate, and the positioning shaft seat is threaded onto the outer wall of the hexagonal cylindrical head bolt. A baffle is connected to the top of the positioning shaft seat, and an A-type Torx handwheel bolt is connected to the outer wall of the positioning shaft seat through a first internal hexagonal bolt. A first positioning block is provided on the outer wall of the first internal hexagonal bolt.

[0013] As a preferred technical solution of this application, a rotating wall is installed on the outer wall of the positioning shaft seat, and a second hexagon socket head cap is provided on the outer wall of the rotating wall. A pendulum handwheel bolt body is provided on the outer wall of the second hexagon socket head cap, and the second hexagon socket head cap is connected to a bearing slide through a second positioning block. An A end cap is installed on the outer wall of the positioning shaft seat through a third hexagon socket head cap, and a sliding bracket is provided at the top of the base plate.

[0014] As a preferred technical solution of this application, a lifting ring is connected to the upper top of the base plate, and the lifting rings are symmetrically arranged on the base plate. A rotating pad is provided on one side of the lifting ring at the upper top of the base plate. A handwheel A is provided on the outer wall of the reducer. A positioning seat is provided on the side wall of the bearing seat, and a pin A is inserted into the inner wall of the positioning seat. A nut is threaded onto the outer wall of the bolt A.

[0015] As a preferred technical solution of this application, the outer wall of the rotating wall is connected to a positioning plate by a fourth internal hex bolt, a clamp is installed at the top of the base plate, the outer wall of the clamp is provided with a clip, and the outer wall of the clamp is threadedly connected to a fifth internal hex bolt.

[0016] As a preferred technical solution of this application, the interior of the positioning shaft seat is connected to a spacer via a bearing A, and the bearing A is snapped onto the outer wall of the shaft body via a shaft snap ring.

[0017] (III) Beneficial Effects

[0018] 1. This tooling, while meeting the assembly requirements of the flame tube transition section, controls the amount of welding deformation, simplifies machining processes, saves manufacturing cycle time, and reduces costs.

[0019] 2. The welding positioning fixture for the transition section of the flame tube facilitates assembly positioning and welding assembly, ensuring the assembly quality of the butt weld and the shape, size and position dimensions of each part during assembly. Attached Figure Description

[0020] Figure 1This is a side view structural schematic diagram of a welding positioning fixture for the transition section of a gas turbine flame tube;

[0021] Figure 2 This is a top view schematic diagram of a welding positioning fixture for the transition section of a gas turbine flame tube.

[0022] In the diagram: 1. Cylindrical pin; 2. Hexagonal head bolt; 3. Positioning shaft seat; 4. Baffle; 5. A-type Torx handwheel bolt; 6. First socket head cap bolt; 7. First positioning block; 8. Rotating wall; 9. Second positioning block; 10. Torx handwheel bolt body; 11. Second socket head cap bolt; 12. Third socket head cap bolt; 13. A-type end cap; 14. Bearing slide; 15. Base plate; 16. Lifting ring; 17. Spacer; 18. A-type bearing; 19. Shaft retaining circlip; 20. Shaft body; 21. Fourth socket head cap bolt 22. Sliding bracket; 23. Clamping plate; 24. B-shaft; 25. Conformal pressure plate; 26. A-type socket head cap bolt; 27. Positioning plate; 28. A-type bolt; 29. ​​Stepped screw; 30. Centering pin; 31. Positioning angle seat; 32. Drive shaft; 33. Bearing seat; 34. End cap with hole; 35. Reducer; 36. Support; 37. Rotating pad; 38. A-type handwheel; 39. A-type pin; 40. Positioning seat; 41. Nut; 42. Positioning disc; 43. Clamp; 44. Fifth socket head cap bolt. Detailed Implementation

[0023] 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.

[0024] This utility model provides a welding positioning fixture for the transition section of a gas turbine flame tube, such as... Figures 1-2 As shown, the welding positioning fixture for the transition section of the gas turbine flame tube includes a base plate 15, and the top end of the base plate 15 is provided with a number of threaded holes and cylindrical pin holes.

[0025] The threaded hole is assembled with the base plate 15 through the hexagonal cylindrical head bolt 2. The top of the base plate 15 is inserted into the cylindrical pin hole and a cylindrical pin body 1 is inserted. The top of the base plate 15 is provided with a support 36. The top of the support 36 is connected to the reducer 35. The output end of the reducer 35 is assembled with a bearing seat 33 through a perforated end cover 34. The inside of the bearing seat 33 is connected to a positioning angle seat 31 through a drive shaft 32. The end of the positioning angle seat 31 is connected to a stepped screw 29 through a centering pin 30. The inside of the centering pin 30 is provided with an A bolt 28.

[0026] The outer wall of the positioning angle seat 31 is provided with a positioning plate 27. The end of the positioning plate 27 is threadedly connected to a conformal pressure plate 25 by an internal hex bolt 26. The middle part of the conformal pressure plate 25 is connected to a shaft 24.

[0027] The top of the base plate 15 is provided with a positioning shaft seat 3, and the positioning shaft seat 3 is threaded onto the outer wall of the hexagonal cylindrical head bolt 2. The top of the positioning shaft seat 3 is connected with a baffle 4. The outer wall of the positioning shaft seat 3 is connected to an A-type Torx handwheel bolt 5 through a first internal hexagonal bolt 6. The outer wall of the first internal hexagonal bolt 6 is provided with a first positioning block 7.

[0028] A rotating wall 8 is installed on the outer wall of the positioning shaft seat 3. A second hexagon socket bolt 11 is provided on the outer wall of the rotating wall 8. A tortoise shell handwheel bolt body 10 is provided on the outer wall of the second hexagon socket bolt 11. The second hexagon socket bolt 11 is connected to the bearing slide 14 through the second positioning block 9. An A end cover 13 is installed on the outer wall of the positioning shaft seat 3 through a third hexagon socket bolt 12. A sliding bracket 22 is provided on the top of the base plate 15.

[0029] A lifting ring 16 is connected to the top of the base plate 15, and the lifting ring 16 is symmetrically arranged on the base plate 15. A rotating pad 37 is provided on one side of the lifting ring 16 at the top of the base plate 15. A handwheel 38 is provided on the outer wall of the reducer 35. A positioning seat 40 is provided on the side wall of the bearing seat 33, and a pin 39 is inserted into the inner wall of the positioning seat 40. A nut 41 is threaded onto the outer wall of the bolt 28.

[0030] The outer wall of the rotating wall 8 is connected to the positioning plate 42 by the fourth internal hex bolt 21. The top of the base plate 15 is equipped with a clamp 43. The outer wall of the clamp 43 is provided with a clip 23. The outer wall of the clamp 43 is threadedly connected to the fifth internal hex bolt 44.

[0031] The interior of the positioning shaft seat 3 is connected to the spacer 17 via the A bearing 18, and the A bearing 18 is snapped onto the outer wall of the shaft body 20 via the shaft snap ring 19.

[0032] Specifically, the base plate 15 is machined with six holes, including four threaded holes and two cylindrical pin holes. Hexagonal head bolts 2 are inserted into the four threaded holes to assemble with the base plate 15, thus positioning the positioning shaft seat 3. The cylindrical pins 1 are inserted into the cylindrical pin holes to precisely determine the relative position of the bearing seat 33 and the base plate 15, ensuring assembly accuracy. The A-type handwheel bolt 5 is fixed by the first internal hexagon bolt 6 and the first positioning block 7. Tightening the A-type handwheel bolt 5 and the stop plate 4 to tighten the upper first internal hexagon bolt 6 restricts the circumferential movement of the rotating wall 8. The handwheel bolt body 10 is fixed by the second internal hexagon bolt 11, the third internal hexagon bolt 12, the second positioning block 9, and the A-type end cap 13. Tightening the handwheel bolt body 10 causes the bearing slide 14 to move back and forth, fixing the welding position of the gas turbine flame tube transition section.

[0033] The bearing slide 14 adopts a dovetail groove structure. The slider slides within the dovetail groove to achieve linear motion of the component. Due to the special shape of the dovetail groove, the slider is not prone to lateral movement within the groove, ensuring the accuracy and stability of the movement, while also being able to withstand a certain lateral force. The lifting ring 16 facilitates the lifting and unloading of the overall tooling by the operator, improving work efficiency. The spacer 17 can adjust the installation position of bearing A 18 and adjust the axial clearance between components, ensuring that the components can work with appropriate clearance, reducing wear, and improving mechanical efficiency. The circlip 19 restricts the lateral movement of the shaft 20, serving as an axial positioning and fixing mechanism. The positioning disc 42 and the bearing slide 14 are connected and fixed by the fourth hexagon socket bolt 21. When the plum blossom handwheel bolt body 10 is tightened, the structure can move back and forth. The sliding bracket 22 protects the parts, preventing parts from falling and getting damaged due to assembly problems in the flame tube transition section, thus affecting the appearance of the parts. The clamp 23 works in conjunction with the clamp 43 and the fifth hexagon socket bolt 44. The clamp 23 has a certain degree of elasticity and toughness. By utilizing its own elastic deformation and cooperating with the clamp 43 and the fifth hexagon socket bolt 44, it generates clamping force to tightly clamp the parts of the flame tube transition section, thereby achieving the functions of positioning, connection and fastening.

[0034] The positioning plate 27 is connected and fixed to the shaft 24 and the conformal pressure plate 25 by the A hexagon socket bolt 26. The positioning plate 27 is machined according to the inner wall size of the transition section of the combustion chamber flame tube. During assembly, it is tightly fitted according to the stop size of the positioning plate 27 to prevent position slippage during welding. The upper end face of the flame tube transition section can be fixed by the cooperation of the A bolt 28, the stepped screw 29, the centering pin 30 and the nut 41. The positioning angle seat 31 and the bearing seat 33 are locked and fixed by bolts. The drive shaft 32 is connected and assembled with the reducer 35. When the A handwheel 38 is rotated, the drive shaft 32 can rotate circumferentially, driving the positioning plate 27 to move. The end cover 34 with holes is fixed by the hexagon socket bolt to prevent oil and impurities from entering the drive shaft 32, affecting the overall lubrication effect of the drive shaft 32 and causing wear on the tooling parts.

[0035] Support 36 provides support for the overall tooling structure. Its height is determined according to the diameter of the transition section of the flame tube. Based on relevant dimensional requirements, it ensures that there is no interference between the relevant parts of the transition section of the flame tube during rotational welding. Rotation pad 37 protects the parts and prevents them from falling and getting damaged during rotational welding, which would affect the appearance of the parts. The positioning angle seat 31 has a groove. When the rotation is completed to meet the welding requirements, pin A 39 is used to fix the position.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A welding positioning fixture for the transition section of a gas turbine flame tube, comprising a base plate (15), characterized in that: The top end of the base plate (15) is provided with several threaded holes and cylindrical pin holes; The threaded hole is assembled with the base plate (15) by a hexagonal cylindrical head bolt (2). A cylindrical pin (1) is inserted into the cylindrical pin hole at the top of the base plate (15). A support (36) is provided at the top of the base plate (15). A reducer (35) is connected to the top of the support (36). A bearing seat (33) is assembled at the output end of the reducer (35) through a perforated end cap (34). A positioning angle seat (31) is connected inside the bearing seat (33) through a transmission shaft (32). A stepped screw (29) is connected to the end of the positioning angle seat (31) through a centering pin (30). An A bolt (28) is provided inside the centering pin (30).

2. The welding positioning fixture for the transition section of a gas turbine flame tube according to claim 1, characterized in that: The outer wall of the positioning angle seat (31) is provided with a positioning plate (27), and the end of the positioning plate (27) is threadedly connected to a conformal pressure plate (25) by an A hexagonal bolt (26). The middle part of the conformal pressure plate (25) is connected to a B shaft (24).

3. The welding positioning fixture for the transition section of a gas turbine flame tube according to claim 1, characterized in that: The top end of the base plate (15) is provided with a positioning shaft seat (3), and the positioning shaft seat (3) is threaded onto the outer wall of the hexagonal cylindrical head bolt (2). The top end of the positioning shaft seat (3) is connected with a baffle plate (4). The outer wall of the positioning shaft seat (3) is connected to an A-type Torx handwheel bolt (5) through a first internal hexagonal bolt (6). The outer wall of the first internal hexagonal bolt (6) is provided with a first positioning block (7).

4. The welding positioning fixture for the transition section of a gas turbine flame tube according to claim 3, characterized in that: The outer wall of the positioning shaft seat (3) is equipped with a rotating wall (8), and the outer wall of the rotating wall (8) is respectively provided with a second internal hex bolt (11). The outer wall of the second internal hex bolt (11) is provided with a plum blossom handwheel bolt body (10), and the second internal hex bolt (11) is connected to a bearing slide (14) through a second positioning block (9). The outer wall of the positioning shaft seat (3) is equipped with an A end cap (13) through a third internal hex bolt (12). The top of the base plate (15) is provided with a sliding bracket (22).

5. A welding positioning fixture for the transition section of a gas turbine flame tube according to claim 3, characterized in that: The top end of the base plate (15) is connected to a lifting ring (16), and the lifting ring (16) is symmetrically arranged on the base plate (15). A rotating pad (37) is provided on one side of the top end of the base plate (15) near the lifting ring (16). A handwheel (38) is provided on the outer wall of the reducer (35). A positioning seat (40) is provided on the side wall of the bearing seat (33), and an A pin (39) is inserted into the inner wall of the positioning seat (40). A nut (41) is threaded onto the outer wall of the A bolt (28).

6. The welding positioning fixture for the transition section of a gas turbine flame tube according to claim 4, characterized in that: The outer wall of the rotating wall (8) is connected to a positioning plate (42) by a fourth internal hex bolt (21). A clamp (43) is installed on the top of the base plate (15). A clip (23) is provided on the outer wall of the clamp (43). A fifth internal hex bolt (44) is threadedly connected to the outer wall of the clamp (43).

7. A welding positioning fixture for the transition section of a gas turbine flame tube according to claim 3, characterized in that: The positioning shaft seat (3) is connected to a spacer (17) via a bearing (18), and the bearing (18) is secured to the outer wall of the shaft body (20) by a shaft snap ring (19).

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