An integrated flame tube with full film cooling

Abstract

The utility model relates to flame tube technical field, specifically is a full gas film cooling integrated flame tube, including integrated flame tube body, connecting assembly, mounting block, first limit slot, second limit slot, support plate and electric push rod, the utility model discloses when integrated flame tube body is damaged, needs to carry out the disassembly replacement, first, the nut on the fixed disc is taken off, then the fixed disc and the protection shell are taken off, and the electric push rod is started, at this moment, the electric push rod will drive the support plate to move down, the third limit slot of the support plate is not formed in the limit of the more spring block, and the support plate moves in the process and will drive the slide ball to move down, and the slide ball will push the top plate and extrude the spring rod, so the spring rod will slide in the inside of fixed cylinder, after that, the staff manually presses one end of integrated flame tube body, then rotates integrated flame tube body again, can take out integrated flame tube body, convenient operation can effectively improve work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of flame tube technology, specifically a fully gas film cooled integrated flame tube. Background Technology

[0002] The combustor is the core component of a gas turbine combustion chamber. Its interior is the area where fuel and air mix, burn, and form high-temperature gas. In pursuit of higher thermal efficiency and power-to-weight ratio, modern high-performance gas turbines have continuously increased turbine inlet temperatures, posing extreme challenges to the high-temperature resistance and lifespan of the combustor. Film cooling is a key technology to protect the combustor wall from high-temperature gas erosion and oxidation. Its principle is to use cooling air introduced from the pores (such as film cooling holes and cooling rings) on the combustor wall to form a low-temperature air film on the wall, isolating the wall from the high-temperature gas.

[0003] While traditional integrated flame tubes can form a low-temperature air film on the wall to isolate the wall from the high-temperature gas, the flame tubes are mostly fixedly installed in the combustion chamber and arranged in a ring around the main shaft of the gas turbine. If a problem occurs with the flame tube, the mounting base needs to be disassembled first, and then the flame tube needs to be removed, which is quite troublesome and will affect work efficiency. Utility Model Content

[0004] To address the aforementioned problems, this invention provides a fully film-cooled integrated flame tube that allows for quick disassembly of the flame tube.

[0005] To address the problems in existing technologies, this utility model provides an integrated all-film cooling flame tube, comprising an integrated flame tube body, a connecting assembly fixedly installed in the combustion chamber, a mounting block fixedly installed on the side wall of the combustion chamber, a first limiting groove formed inside the mounting block, a second limiting groove formed inside the mounting block, and the second limiting groove located above the first limiting groove, a support plate slidably installed inside the mounting block, and the output shaft of the electric push rod fixedly connected to the lower end of the support plate. The connecting assembly includes a mounting block, a first limiting groove, a second limiting groove, a third limiting groove, an electric push rod, a support plate, a top plate, a spring rod, ball bearings, and a fixing cylinder. Multiple sets of ball bearings are fixedly installed at the lower end of the support plate, enabling quick disassembly of the damaged integrated flame tube body, thereby improving work efficiency.

[0006] Specifically, the third limiting groove is formed inside the support plate and is located directly below the first limiting groove. Multiple sets of fixing cylinders are fixedly installed inside the mounting block. A set of spring rods is slidably connected inside the fixing cylinders. A set of top plates is fixedly connected to the upper end of the spring rods and is slidably connected inside the protective shell.

[0007] Specifically, the integrated flame tube body is made of GH3625 high-temperature alloy plate.

[0008] Specifically, a set of spring blocks are slidably connected inside the third limiting groove. The spring blocks are slidably connected inside the connecting block. The connecting block is fixedly installed on the outer wall of the protective shell. The connecting block is slidably connected to the first limiting groove. The connecting block is slidably connected to the outer wall of the integrated flame tube body. One end of the integrated flame tube body is fixedly connected to the fixing plate by a nut.

[0009] Specifically, an outer ring of the flame tube is welded inside the integrated flame tube body, and a set of inner rings of the flame tube is installed inside the outer ring of the flame tube.

[0010] Beneficial effects: 1. In this utility model, when the integrated flame tube body needs to be replaced or maintained, the spring rod is retracted. Simply remove the fixing plate and protective shell, and then rotate the integrated flame tube body to disassemble it, which can improve work efficiency.

[0011] 2. The seamless design of the flame tube in this invention means that there is no leakage problem due to assembly gaps. All cooling airflow is introduced through precisely designed air film holes and cooling rings, maximizing the utilization rate of cooling air. A complete, stable, and efficient air film protective layer can be formed on the wall surface. Under the same cooling effect, the cooling air consumption can be effectively reduced by about 10%-15%. This saved air can be used to participate in combustion and mixing, directly improving the engine's thermal efficiency and output power.

[0012] 3. Although the integral molding of this utility model has high requirements for manufacturing process, it avoids complex machining and assembly processes, reduces the number of parts, and reduces manufacturing costs and cycle. The integral structure deforms in a coordinated manner at high temperature, has excellent vibration resistance, and its working reliability and stability are far superior to the split structure.

[0013] 4. This utility model adopts an integrated structure, eliminating mechanical connection methods such as bolt connections, fundamentally avoiding stress concentration and fatigue weak points, significantly enhancing the overall rigidity and temperature and pressure bearing capacity of the flame tube, and greatly improving its low-cycle fatigue life and high-cycle fatigue life.

[0014] 5. This utility model eliminates a large number of bolts, nuts, mounting edges and other connecting parts, achieving significant weight reduction, which meets the ultimate pursuit of weight reduction in aero engines. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1This is a three-dimensional schematic diagram of the present invention; Figure 2 This is a schematic diagram of the internal component connection structure of the connecting assembly of this utility model; Figure 3 This is an overall sectional view of the present invention; Figure 4 This is a cross-sectional view of the flame tube of this utility model; Figure 5 This is an isometric view of the overall structure of the flame tube of this utility model; Figure 6 This utility model Figure 3 Enlarged view of point A in the middle.

[0017] In the diagram: 1. Inner ring of the flame tube; 2. Outer ring of the flame tube; 3. Integrated flame tube body; 310. Protective shell; 311. Fixing plate; 312. Connecting block; 313. Spring block; 4. Connecting assembly; 410. Mounting block; 411. First limiting groove; 412. Second limiting groove; 413. Third limiting groove; 414. Electric actuator; 415. Support plate; 416. Top plate; 417. Spring rod; 418. Sliding ball; 419. Fixing cylinder. Detailed Implementation

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

[0019] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0020] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" 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 technology based on the specific circumstances.

[0021] In the description of this application, spatial relation terms such as "below," "under," "below," "below," "above," "over," etc., are used herein to describe the relationship between one element or feature shown in the figures and other elements or features. It should be understood that, in addition to the orientation shown in the figures, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figures is flipped, an element or feature described as "below" or "under" or "below" of other elements or features will be oriented "above" other elements or features. Therefore, the exemplary terms "below" and "under" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein are interpreted accordingly.

[0022] In the description of this application, the term "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to implement and use the present invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the present invention can be implemented without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the present invention with unnecessary detail. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0023] Example 1: like Figure 1 , Figure 2 , Figure 3 as well as Figure 6The diagram shows an integrated flame tube with full film cooling, comprising an integrated flame tube body 3, a connecting assembly 4 fixedly installed in the combustion chamber, a mounting block 410 fixedly installed on the side wall of the combustion chamber, a first limiting groove 411 formed inside the mounting block 410, a second limiting groove 412 formed inside the mounting block 410, and the second limiting groove 412 located above the first limiting groove 411, a support plate 415 slidably installed inside the mounting block 410, and the output shaft of the electric push rod 414 fixedly connected to the lower end of the support plate 415. The connecting assembly 4 includes the mounting block 410, the first limiting groove 411, the second limiting groove 412, the third limiting groove 413, the electric push rod 414, the support plate 415, the top plate 416, the spring rod 417, the sliding ball 418, and the fixing cylinder 419. The lower end of the support plate 415 is fixedly installed with multiple sets of sliding balls 418, which can quickly disassemble the damaged integrated flame tube body 3, thereby improving work efficiency. The third limiting groove 413 is formed inside the support plate 415. The third limiting groove 413 is located directly below the first limiting groove 411. Multiple sets of fixing cylinders 419 are fixedly installed inside the mounting block 410. A set of spring rods 417 are slidably connected inside the fixing cylinders 419. A set of top plates 416 are fixedly connected to the upper end of the spring rods 417. The top plates 416 are slidably connected inside the protective shell 310. A set of spring blocks 313 are slidably connected inside the third limiting groove 413. The spring blocks 313 are slidably connected inside the connecting block 312. The connecting block 312 is fixedly installed on the outer wall of the protective shell 310. The connecting block 312 is slidably connected to the first limiting groove 411. The connecting block 312 is slidably connected to the outer wall of the integrated flame tube body 3. One end of the integrated flame tube body 3 is fixedly connected to the fixing plate 311 by a nut.

[0024] like Figure 1 , Figure 2 , Figure 3 as well as Figure 6As shown, when the integrated flame tube body 3 is damaged and needs to be disassembled and replaced, first remove the nut on the fixing plate 311, then remove the fixing plate 311 and the protective shell 310. After that, start the electric actuator 414. At this time, the electric actuator 414 will drive the support plate 415 to move downward. At this time, the third limiting groove 413 opened in the support plate 415 will no longer form a limit on the multi-spring block 313. During the movement of the support plate 415, it will drive the sliding ball 418 to move downward. The sliding ball 418 will push the top plate 416 to squeeze the upper end of the spring rod 417. The spring rod 417 will slide inside the fixed cylinder 419. Then, the operator manually presses one end of the integrated flame tube body 3 and then rotates the integrated flame tube body 3. At this time, the connecting block 312 will also rotate. After the connecting block 312 rotates to the bottom of the second limiting groove 412, the operator pulls the integrated flame tube body 3. The integrated flame tube body 3 will drive the connecting block 312 to slide inside the second limiting groove 412. In this way, the integrated flame tube body 3 can be removed from the mounting block 410. The operation is convenient and can effectively improve work efficiency. Furthermore, a set of 05 is installed inside the mounting block 410 of this utility model. The outer wall of this 05 is slidably connected to the support plate 415 and the top plate 416. The 05 can effectively insulate heat, thereby preventing the spring rod 417 from being attacked by high heat and causing it to malfunction. When the staff presses the integrated flame tube body 3 again, one end of the integrated flame tube body 3 will be pressed against the upper end of the support plate 415. At this time, when the integrated flame tube 3 is rotated, the integrated flame tube 3 will rotate together with the support plate 415 due to the connecting block 312. The sliding ball 418 at the lower end of the support plate 415 can reduce the friction between the support plate 415 and the top plate 416, thereby preventing the support plate 415 and the integrated flame tube 3 from being difficult to rotate due to excessive friction.

[0025] like Figure 4 as well as Figure 5 As shown, an outer ring 2 of the flame tube is welded inside the integrated flame tube body 3, and a set of inner rings 1 of the flame tube is installed inside the outer ring 2.

[0026] like Figure 4 as well as Figure 5As shown, the integrated flame tube body of this utility model uses GH3625 high-temperature alloy plate as raw material. This material not only has excellent high-temperature performance, but also good welding and forming performance, which enables the key process of roll welding to be reliably realized, ensuring the matching of weld quality and base material performance. When the engine is working, the cooling air from the high-pressure compressor is divided into multiple streams. One stream enters the cavity between the flame tube and the casing to convectively cool the flame tube wall; the other stream seeps into the inner wall surface through the gas film pores on the flame tube wall, forming a gas film covering the entire inner wall, effectively isolating the core combustion gas with a temperature of up to 2000℃ or more, so that the actual temperature of the flame tube wall surface is maintained within the safe range for long-term operation of GH3625 material. Furthermore, in this utility model, the flame tube is no longer assembled from separate parts such as the inner ring and the outer ring. Instead, through advanced welding technology (such as roll welding), the inner ring and the outer ring of the flame tube are welded into an inseparable integral component at their mounting edges, forming a complete "cage-like" structure.

[0027] Manufacturing process and structural features: Blanking and forming: Using GH3625 high-temperature alloy sheet, blanks for the outer ring 2 and inner ring 1 of the flame tube are manufactured through blanking, rolling, spinning, or stamping processes. During the forming process, all necessary film cooling holes and cooling air inlets can be pre-machined on the sheet.

[0028] Positioning and assembly: The formed outer ring 2 and inner ring 1 are precisely aligned through their respective mounting edges and fixed with clamps to ensure the coaxiality and relative positional accuracy of the two.

[0029] Key Process: Roll Welding: Roll welding is used to continuously weld along the mounting edges where the inner and outer rings meet. Roll welding is a type of resistance welding that uses a pair of rolling electrodes to continuously roll and apply pressure while simultaneously applying a continuous or intermittent current, thus forming a continuous, dense, and highly airtight weld. This weld permanently connects the outer ring 2 and the inner ring 1 into a rigid, integral structure.

[0030] Post-processing and inspection: After welding, necessary heat treatment is performed to eliminate welding stress. Then, non-destructive testing (such as X-ray or penetrant testing) is carried out on the weld to ensure that the weld quality is 100% qualified. Finally, the entire weld is finished and cleaned.

[0031] Working principle: In this utility model, when it is necessary to disassemble and replace the integrated flame tube body 3, first remove the nut on the fixing plate 311, then remove the fixing plate 311 and the protective shell 310. After that, start the electric push rod 414. At this time, the electric push rod 414 will drive the support plate 415 to move downward. At this time, the third limiting groove 413 opened in the support plate 415 will no longer form a limit on the multi-spring block 313. During the movement of the support plate 415, it will drive the sliding ball 418 to move downward. The sliding ball 418 will push the top plate 416 to squeeze the upper end of the spring rod 417. In this way, the spring rod 417 will slide inside the fixing cylinder 419. After that, the operator manually presses one end of the integrated flame tube body 3 and then rotates the integrated flame tube body 3. At this time, the connecting block 312 also... The integrated flame tube body 3 will rotate accordingly. After the connecting block 312 rotates to the bottom of the second limiting groove 412, the operator will pull the integrated flame tube body 3. The integrated flame tube body 3 will drive the connecting block 312 to slide inside the second limiting groove 412. One end of the integrated flame tube body 3 will be pressed against the upper end of the support plate 415. When the integrated flame tube 3 is rotated, the integrated flame tube 3 will rotate together with the support plate 415 due to the connecting block 312. The sliding ball 418 at the lower end of the support plate 415 can reduce the friction between the support plate 415 and the top plate 416, thereby preventing the support plate 415 and the integrated flame tube 3 from being difficult to rotate due to excessive friction. In this way, the integrated flame tube body 3 can be removed from the mounting block 410. The operation is convenient and can effectively improve work efficiency.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions in the above embodiments and specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model.

Claims

1. A fully film-cooled integrated flame tube, characterized in that: Includes an integrated flame tube body (3); Connection component (4), which is fixedly installed in the combustion chamber; Mounting block (410), which is fixedly mounted on the side wall of the combustion chamber; The first limiting groove (411) is formed inside the mounting block (410); The second limiting groove (412) is formed inside the mounting block (410) and is located at the upper end of the first limiting groove (411); A support plate (415) is slidably mounted inside the mounting block (410); An electric actuator (414) is provided, the output shaft of which is fixedly connected to the lower end of a support plate (415).

2. The all-film cooled integrated flame tube according to claim 1, characterized in that: The interior of the connecting assembly (4) includes a mounting block (410), a first limiting groove (411), a second limiting groove (412), a third limiting groove (413), an electric push rod (414), a support plate (415), a top plate (416), a spring rod (417), a sliding ball (418), and a fixing cylinder (419). Multiple sets of sliding balls (418) are fixedly installed at the lower end of the support plate (415).

3. The all-film cooled integrated flame tube according to claim 2, characterized in that: The third limiting groove (413) is opened inside the support plate (415). The third limiting groove (413) is located directly below the first limiting groove (411). Multiple sets of fixing cylinders (419) are fixedly installed inside the mounting block (410). A set of spring rods (417) is slidably connected inside the fixing cylinders (419). A set of top plates (416) is fixedly connected to the upper end of the spring rods (417). The top plates (416) are slidably connected inside the protective shell (310).

4. The all-film cooled integrated flame tube according to claim 2, characterized in that: A set of spring blocks (313) are slidably connected inside the third limiting groove (413). The spring blocks (313) are slidably connected inside the connecting block (312). The connecting block (312) is fixedly installed on the outer wall of the protective shell (310). The connecting block (312) is slidably connected to the first limiting groove (411).

5. The all-film cooled integrated flame tube according to claim 2, characterized in that: The integrated flame tube body (3) is made of GH3625 high-temperature alloy plate.

6. The all-film cooled integrated flame tube according to claim 4, characterized in that: The connecting block (312) is slidably connected to the outer wall of the integrated flame tube body (3), and one end of the integrated flame tube body (3) is fixedly connected to the fixing plate (311) by a nut.

7. The all-film cooled integrated flame tube according to claim 6, characterized in that: The integrated flame tube body (3) has an outer ring (2) welded inside, and an inner ring (1) is welded inside the outer ring (2).

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