Laminate forming structure with coating and method

Abstract

The invention relates to the technical field of aero-engines, and discloses a laminated plate forming structure and method with a coating, a porous laminated plate flame tube module, a supporting plate and a needle plate are positioned through a positioning pin clamped in a functional hole, and a hole blocking needle of the needle plate is inserted into a diverging hole; the porous laminate flame tube module of the flat plate structure, the supporting plate and the needle plate are integrally formed through diffusion welding, and it is guaranteed that the relative position relation between the formed hole blocking needles and the formed diffusion holes is kept unchanged; and after integral forming, a plurality of block type porous laminate flame tube modules are circumferentially welded into an integral porous laminate flame tube. According to the anti-blocking device, the hole blocking needle can be integrally inserted, pulled out and firmly fixed at high precision, and efficient and reliable anti-blocking protection of laminate coating spraying is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of aero-engine technology, and discloses a coated laminate forming structure and method. Background Technology

[0002] Future advanced aero-engine main combustion chambers will primarily develop towards low pollution and high temperature rise, requiring advanced and efficient thermal protection technologies to meet the demands of low wall temperatures and long service life. Porous layered flame tubes are an advanced and efficient cooling structure with high overall cooling efficiency and lightweight construction, making them an ideal cooling technology for advanced low-pollution and high-temperature rise combustion chambers. To further improve the temperature resistance and thermal shock resistance of porous layered flame tubes, enhance their reliability, and extend their service life, a thermal barrier coating needs to be applied to the hot side.

[0003] The porous plate flame tube has a double-layer thin-walled structure, with the two thin plates connected by diffusion welding. Due to welding shrinkage and other factors, the thermal barrier coating must be sprayed after welding is completed. However, spraying after completion can easily cause the coating to enter the narrow cooling channels between the two thin plates, which cannot be effectively removed, leading to blockage of the internal channels and clogging of the flame tube's venting holes.

[0004] In addition, since the porous plate flame tube has tens of thousands of cooling holes, the traditional single pin insertion and removal efficiency is extremely low. At the same time, due to the small insertion depth, the fixation is not reliable and it is easy to be blown out by the high-speed airflow during the spraying process, resulting in clogging of the holes. Summary of the Invention

[0005] The purpose of this invention is to provide a coated layer forming structure and method that can achieve high-precision insertion, extraction and firm fixation of the plugging needle as a whole, ensuring efficient and reliable anti-clogging protection of the layer coating spraying.

[0006] To achieve the above-mentioned technical effects, the technical solution adopted by the present invention is as follows: A coated laminated structure, comprising: A support plate is attached to the inner wall of a flat, porous layered flame tube module. Multiple porous layered flame tube modules are used to bend and deform before being assembled into a complete ring structure of the flame tube. Each porous layered flame tube module includes a planar impact plate and a diverging plate. The impact plate has multiple impact holes, and the diverging plate is located inside the impact plate and has multiple diverging holes. A turbulence column is provided between the impact plate and the diverging plate. The porous layered flame tube module also has functional holes that penetrate the impact plate and the diverging plate. A needle plate, wherein a plugging needle is provided on the needle plate and inserted into the diverging hole, and a needle hole is provided on the support plate for the plugging needle to pass through; The positioning pin is inserted into the functional hole and is used to fix the porous layer flame tube module, the support plate and the needle plate together.

[0007] Furthermore, the plugging needle extends to a position close to the inner wall surface of the impact plate, and the end of the plugging needle is in clearance fit with the inner wall surface of the impact plate.

[0008] Furthermore, the gap between the end of the plugging needle and the inner wall of the impact plate is 0.01mm~0.2mm.

[0009] Furthermore, the outer wall of the plugging needle and the inner wall of the diverging hole are fitted with a clearance, and the clearance between the outer wall of the plugging needle and the inner wall of the diverging hole is 0.05mm~0.5mm.

[0010] To achieve the above-mentioned technical effects, the present invention also provides a method for forming a coated laminate, the method being based on the aforementioned laminate forming structure, comprising: Welding material for diffusion welding is provided between the impact plate and the divergence plate; A planar support plate is attached to the inner wall of the diverging plate of the porous layer flame tube module. The needle plate is attached to the inner wall of the support plate; and the positioning pin is inserted through the needle plate and into the functional hole to fix the porous layer flame tube module, the support plate and the needle plate to form a planar layer forming structure. A planar layered plate forming structure is installed in a forming mold, and a curved layered plate forming structure is formed and welded using a diffusion welding method. The positioning pins, support plates, and needle plates on the curved layered plate forming structure are removed to obtain a curved porous layered plate flame tube module. Multiple curved porous layered plate flame tube modules are assembled into a flame tube ring structure.

[0011] Furthermore, after assembling multiple curved porous layer flame tube modules into a complete ring structure of the flame tube, the needle plate is installed again on the corresponding curved porous layer flame tube module. A connector is used to make the needle plate fit with the curved porous layer flame tube module, and a protective coating is sprayed on the inner wall surface of the radiating plate. After the spraying is completed, the needle plate and its connector are removed.

[0012] Furthermore, the connecting element is a connecting bolt.

[0013] Furthermore, the needle plate has a porous mesh structure.

[0014] Compared with the prior art, the beneficial effects of this invention are as follows: This invention uses a porous layered flame tube module, a support plate, and a needle plate to achieve positioning through positioning pins locked in functional holes. The plugging needles of the needle plate are inserted into the diverging holes. The porous layered flame tube module, support plate, and needle plate with flat plate structure are then integrally formed by diffusion welding, ensuring that the relative positional relationship between the plugging needles and the diverging holes remains unchanged after forming. After integral forming, multiple segmented porous layered flame tube modules are circumferentially welded into an integral porous layered flame tube, which can realize the integral high-precision insertion, extraction, and firm fixation of the plugging needles, ensuring efficient and reliable anti-clogging protection of the layered coating spraying. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the flat, porous layered flame tube module structure in the embodiment; Figure 2 This is a schematic diagram of the coated layer forming structure in the embodiment; Figure 3 This is a schematic diagram of the curved layer forming structure in the embodiment; Figure 4 This is a schematic diagram of the needle plate and plugging needle in the embodiment; Figure 5 This is a schematic diagram of the spray gun position during spraying of the coated laminate structure in the embodiment. Among them, 1. Support plate; 101. Pinhole; 2. Porous layer flame tube module; 201. Impact plate; 202. Diverging plate; 203. Impact hole; 204. Diverging hole; 205. Baffle column; 206. Functional hole; 3. Needle plate; 4. Hole plugging needle; 5. Positioning pin; 6. Connector; 7. Spray gun; 8. Protective coating. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the embodiments and accompanying drawings. However, this should not be construed as limiting the scope of the above-described subject matter of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0017] Example See Figures 1 to 5 A laminated structure with a coating, comprising: A support plate 1 is attached to the inner wall of a flat, porous layered flame tube module 2. Multiple porous layered flame tube modules 2 are used to bend and deform before being assembled into a complete ring structure of a flame tube. Each porous layered flame tube module 2 includes a planar impact plate 201 and a diverging plate 202. The impact plate 201 is provided with multiple impact holes 203. The diverging plate 202 is located inside the impact plate 201 and is provided with multiple diverging holes 204. A turbulence column 205 is provided between the impact plate 201 and the diverging plate 202. The porous layered flame tube module 2 is also provided with a functional hole 206 that penetrates the impact plate 201 and the diverging plate 202. The needle plate 3 is provided with a plugging needle 4 that can be inserted into the diverging hole 204, and the support plate 1 is provided with a needle hole 101 through which the plugging needle 4 can pass. Positioning pin 5 is inserted into the functional hole 206 to fix the porous layer flame tube module 2, support plate 1 and needle plate 3 together.

[0018] In this embodiment, the method for forming a coated laminate includes: Welding material for diffusion welding is provided between the impact plate 201 and the divergence plate 202; The planar support plate 1 is attached to the inner wall of the diverging plate 202 of the porous layer flame tube module 2; The needle plate 3 is attached to the inner wall of the support plate 1; and the positioning pin 5 is inserted through the needle plate 3 and inserted into the functional hole 206 to fix the porous layer flame tube module 2, the support plate 1 and the needle plate 3 to form a planar layer forming structure. A planar layered plate forming structure is installed in a forming mold, and a curved layered plate forming structure is formed and welded using a diffusion welding method. The positioning pins 5, support plates 1 and needle plates 3 on the curved layered structure are removed to obtain the curved porous layered flame tube module 2. Multiple curved porous layered flame tube modules 2 are assembled into a flame tube ring structure.

[0019] In this embodiment, the diverging holes 204 and the plugging needles 4 are arranged in the same pattern. The porous layered flame tube module 2, the support plate 1, and the needle plate 3 are positioned by positioning pins 5 that are engaged in the functional holes 206. The plugging needles 4 of the needle plate 3 are inserted into the diverging holes 204. The porous layered flame tube module 2, the support plate 1, and the needle plate 3, which are flat structures, are then integrally formed by diffusion welding to ensure that the relative positional relationship between the plugging needles 4 and the diverging holes 204 remains unchanged after forming. After integral forming, multiple segmented porous layered flame tube modules 2 are circumferentially welded into a single porous layered flame tube. Then, the needle plate 3 with the plugging needle 4 can be installed onto the corresponding diverging plate 202 for the second time, so that the multi-hole needle can be inserted into the diverging hole 204 for the second time. The connector 6 is used to pass through the functional hole 206 on the needle plate 3 and the multi-hole layer flame tube in sequence, so as to complete the secondary assembly and fixation of the needle plate 3 and the multi-hole layer corresponding to the formed flame tube overall ring structure. This avoids the problem of the sprayed material entering the diverging hole 204 and causing blockage when spraying the protective coating 8.

[0020] In this embodiment, after the assembly and fixing of the needle plate 3 and the porous layer flame tube are completed, a protective coating 8 is sprayed on the outside of the diverging plate 202. To avoid the needle plate 3 obstructing the coating, the support plate 1 is 20mm thick. The spray gun 7 and the diverging plate 202 are not perpendicular, but at an angle α=20°. Figure 5 As shown, strokes 1 and 2 are sprayed alternately. After the coating is applied, the connector 6 is removed, and then the needle plate 3 is pulled out as a whole. This allows for high-precision insertion, removal, and secure fixing of the plugging needle 4, ensuring efficient and reliable anti-clogging protection during the coating application.

[0021] In this embodiment, the outer wall of the plugging needle 4 and the inner wall of the diverging hole 204 are fitted with a clearance, and the clearance between the outer wall of the plugging needle 4 and the inner wall of the diverging hole 204 is 0.05mm~0.2mm. This facilitates the plugging needle 4 passing through the diverging hole 204 on the diverging plate 202 before molding, and makes it easy to insert the needle plate 3 into the diverging plate 202 as a whole during subsequent coating after molding. After spraying, the needle plate 3 is easy to remove, and the problem of the plugging needle 4 getting stuck in the diverging hole 204 is not likely to occur.

[0022] In this embodiment, the plugging needle 4 extends to a position close to the inner wall surface of the impact plate 201, and the end of the plugging needle 4 is in clearance fit with the inner wall surface of the impact plate 201, with a clearance of 0.01mm to 0.1mm. This serves three purposes: first, to prevent deformation of the diverging hole 204 during the molding process and maintain the hole shape; second, to avoid the plugging needle 4 being too short after molding, which would prevent full coverage spraying of the inner wall of the diverging plate 202; and third, to ensure that the plugging needle 4 does not come into contact with the diffusion welding transition material, thus preventing the plugging needle 4 from being diffusely welded into the porous layer flame tube during the diffusion welding of the impact plate 201 and the diverging plate 202, further ensuring that the plugging needle 4 is less likely to break off inside the diverging hole 204.

[0023] In this embodiment, the connector 6 is a connecting bolt. The design of the connecting bolt ensures a tight fit between the needle plate 3 and the porous layer flame tube module 2, effectively preventing paint from seeping into the gap between the plugging needle 4 and the layer during the spraying process, thus ensuring the uniformity and integrity of the coating spraying. At the same time, the easy disassembly and assembly characteristics of the connecting bolt make the needle plate 3 easy to install and disassemble, improving work efficiency.

[0024] In this embodiment, the needle plate 3 has a porous mesh structure, which facilitates the spray gun 7 to extend into the mesh structure during the spraying process to achieve efficient spraying of the radiating plate 202 and reduce spraying dead angles.

[0025] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A coated laminate forming structure, characterized in that, include: A support plate (1) is attached to the inner wall of a flat porous layered flame tube module (2). Multiple porous layered flame tube modules (2) are used to bend and deform and then assembled into a flame tube ring structure. Each porous layered flame tube module (2) includes a planar impact plate (201) and a diverging plate (202). The impact plate (201) is provided with multiple impact holes (203). The diverging plate (202) is located inside the impact plate (201) and is provided with multiple diverging holes (204). A turbulence column (205) is provided between the impact plate (201) and the diverging plate (202). The porous layered flame tube module (2) is also provided with a functional hole (206) that penetrates the impact plate (201) and the diverging plate (202). The needle plate (3) is provided with a plugging needle (4) that can be inserted into the diverging hole (204), and the support plate (1) is provided with a needle hole (101) through which the plugging needle (4) can pass; Positioning pin (5) is inserted into the functional hole (206) to fix the porous layer flame tube module (2), support plate (1) and needle plate (3) together.

2. The coated laminate forming structure according to claim 1, characterized in that, The plugging needle (4) extends to a position close to the inner wall surface of the impact plate (201), and the end of the plugging needle (4) is in clearance fit with the inner wall surface of the impact plate (201).

3. The coated laminate forming structure according to claim 2, characterized in that, The gap between the end of the plugging needle (4) and the inner wall of the impact plate (201) is 0.01mm~0.2mm.

4. The coated laminate forming structure according to claim 1, characterized in that, The outer wall of the plugging needle (4) and the inner wall of the diverging hole (204) are fitted with a clearance, and the clearance between the outer wall of the plugging needle (4) and the inner wall of the diverging hole (204) is 0.05mm~0.5mm.

5. A method for forming a coated laminate, the method being based on the laminate forming structure according to claim 1 or 2, characterized in that, include: Welding material for diffusion welding is provided between the impact plate (201) and the diverging plate (202); A planar support plate (1) is attached to the inner wall of the diverging plate (202) of the porous layer flame tube module (2); The needle plate (3) is attached to the inner wall of the support plate (1); and the positioning pin (5) is inserted through the needle plate (3) and inserted into the functional hole (206) to fix the porous layer flame tube module (2), the support plate (1) and the needle plate (3) to form a planar layer forming structure. A planar layered plate forming structure is installed in a forming mold, and a curved layered plate forming structure is formed and welded using a diffusion welding method. Remove the positioning pin (5), support plate (1) and needle plate (3) from the curved layered structure to obtain the curved porous layered flame tube module (2). Assemble multiple curved porous layered flame tube modules (2) into a flame tube ring structure.

6. The method for forming a coated laminate according to claim 5, characterized in that, After assembling multiple curved porous layer flame tube modules (2) into a complete ring structure of flame tube, the needle plate (3) is installed again on the corresponding curved porous layer flame tube module (2). The needle plate (3) is attached to the curved porous layer flame tube module (2) using the connector (6). A protective coating (8) is sprayed on the inner wall of the radiating plate (202). After the spraying is completed, the needle plate (3) and its connector (6) are removed.

7. The method for forming a coated laminate according to claim 6, characterized in that, The connector (6) is a connecting bolt.

8. The method for forming a coated laminate according to claim 5, characterized in that, The needle plate (3) has a porous mesh structure.

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