A heat insulation disc and a heat insulation disc fixing structure

Abstract

The utility model provides a kind of heat insulation disc and heat insulation disc fixed structure, heat insulation disc includes several fan-shaped disc body, several fan-shaped disc body is detachably arranged on combustion chamber shell, and there is gap between adjacent two fan-shaped disc body;Fan-shaped disc body includes disc body base plate and disc body cover, disc body cover is arranged on disc body base plate, and main chamber is arranged between disc body cover and disc body base plate;Disc body base plate is equipped with outer ring outlet, inner ring outlet and circumferential outlet, outer ring outlet, inner ring outlet and circumferential outlet are all communicated with main chamber;Main chamber is also communicated with main chamber cold air inlet, cold air enters into main chamber from main chamber cold air inlet and flows out from outer ring outlet, inner ring outlet and circumferential outlet respectively, and the heat insulation disc cooling.The utility model heat insulation disc is divided into several fan-shaped disc body, and several fan-shaped disc body is detachably connected on combustion chamber shell, allow fan-shaped disc body to carry out local replacement, improve product utilization.

Description

Technical Field

[0001] This utility model relates to the technical field of heat insulation plates on combustion chambers, and in particular to a heat insulation plate and a heat insulation plate fixing structure. Background Technology

[0002] Combustion chamber heat shields are core components of high-temperature combustion systems in aircraft engines, gas turbines, and rocket engines. These systems experience extremely high temperatures inside the combustion chamber during combustion. Heat shields and heat-insulating tiles are typically installed on the inner walls of the combustion chamber to protect the structure and prevent overheating. Because the heat shields directly withstand the scouring of high-temperature exhaust gases, they are often made of high-temperature resistant materials, such as ceramic matrix composites and nickel-based superalloys, and are combined with specific cooling structures to reduce the heat transferred to the combustion chamber walls. Furthermore, the introduction of additive manufacturing allows for more complex and efficient cooling structures in the heat shields, further improving their cooling efficiency.

[0003] For example, prior art patent publication number CN203147822U discloses a connection structure for a flame tube wall and a gas turbine combustor using this connection structure. The flame tube liner is fixed to the outer wall of the flame tube by bolts and nuts. However, the bolts are susceptible to high-temperature erosion and loosening due to vibration. Another example is prior art patent publication number CN204806447U, which discloses a gas turbine combustor and its flame tube liner. This patent proposes a liner with bosses and countersunk holes that can include bolt bases, improving the risk of high-temperature erosion of the bolt bases. However, this flame tube liner lacks an efficient cooling structure and the ability to be replaced locally.

[0004] Currently, heat shields mainly adopt a grooved annular design. Installed in the burner outlet area, they guide airflow to form a strong recirculation zone, ensuring stable combustion, optimizing combustion efficiency, and reducing emissions. However, existing heat shields still have the following problems:

[0005] 1. During use, the insulation panel is subjected to repeated thermal cycling loads and chemical corrosion from fuel gas, posing a risk of damage and requiring periodic replacement. Traditional insulation panels are one-piece structures; if a part fails, the entire panel needs to be replaced, resulting in resource waste.

[0006] 2. Traditional heat insulation panels typically use impact cooling, which consumes a large amount of cold air and reduces unit efficiency.

[0007] 3. The heat shield is usually fixed to the combustion chamber cylinder block from inside the combustion chamber using screws. Under conditions with large vibrations, there is a risk that the screws may loosen, causing damage to the heat shield or the combustion chamber cylinder block.

[0008] In summary, to address the problems existing in the current heat insulation plate technology, there is an urgent need to design a heat insulation plate that can be partially replaced and has high cooling efficiency and vibration reliability. Utility Model Content

[0009] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a heat insulation plate and a heat insulation plate fixing structure to solve the problems existing in the prior art.

[0010] To achieve the above and other related objectives, this utility model provides a heat insulation plate, which includes a plurality of sector-shaped discs detachably mounted on a combustion chamber shell, with gaps between adjacent sector-shaped discs. Each sector-shaped disc includes a base plate and a cover plate, the cover plate being mounted on the base plate, and a main chamber being disposed between the cover plate and the base plate. The base plate has an outer ring outlet, an inner ring outlet, and a circumferential outlet, all of which are connected to the main chamber. The main chamber is also connected to a main chamber cold air inlet, through which cold air enters the main chamber and flows out from the outer ring outlet, inner ring outlet, and circumferential outlet, respectively, to cool the heat insulation plate.

[0011] Preferably, the disc substrate includes a near-heating curved panel close to the burner and a far-heating curved panel away from the burner, the inner ring outlet is disposed on the end face of the near-heating curved panel, the outer ring outlet is disposed on the end face of the far-heating curved panel, and the circumferential outlet is disposed on the end face of the relative gap between the disc substrates.

[0012] Preferably, both the near-heat curved panel and the far-heat curved panel are provided with cold air channels, and the main chamber is connected to the outer ring outlet and the inner ring outlet through the cold air channels; a vortex generator is provided in the cold air channel, and the vortex generator is at a certain angle to the extension direction of the cold air channel.

[0013] Preferably, the far-heating curved panel is further provided with an expansion chamber, which is connected to the cold air channel in the far-heating curved panel; the far-heating curved panel is also provided with reinforcing ribs.

[0014] To achieve the above or other objectives, this utility model also discloses a heat insulation plate fixing structure for fixing the aforementioned heat insulation plate, including an upper fixing ring, a lower fixing ring, a sealing ring, and a connecting assembly. The sealing ring is disposed between a sealing ring groove opened on the lower surface of the upper fixing ring and the upper surface of the lower fixing ring. The upper fixing ring and the lower fixing ring, as well as the lower fixing ring and the fan-shaped plate body, are connected by the connecting assembly.

[0015] Preferably, the connecting assembly includes a first connecting assembly for connecting the upper fixing ring and the lower fixing ring; the upper fixing ring has a plurality of upper fixing ring countersunk holes on its upper surface, and an upper fixing ring through hole is formed in the upper fixing ring countersunk hole; the lower fixing ring has a plurality of lower fixing ring connecting holes on its upper surface; the lower surface of the upper fixing ring is fitted to the upper surface of the lower fixing ring, and the upper fixing ring through hole and the lower fixing ring connecting hole are aligned and connected by the first connecting assembly.

[0016] Preferably, a sealing ring groove is formed on the lower surface of the upper fixing ring, and the sealing ring is disposed in the sealing ring groove.

[0017] Preferably, the connecting assembly includes a second connecting assembly for connecting the lower fixing ring and the sector-shaped disk body; the upper surface of the lower fixing ring has a lower fixing ring countersunk hole, the axial bottom surface of the lower fixing ring countersunk hole has a lower fixing ring axial countersunk hole, the axial countersunk hole of the lower fixing ring has an axial through hole, the lower surface of the lower fixing ring has a heat insulation disk groove, the sector-shaped disk body has a heat insulation disk boss, the heat insulation disk boss has a heat insulation disk connecting hole; the heat insulation disk boss is disposed in the heat insulation disk groove, and the axial through hole is aligned with the heat insulation disk connecting hole and connected by the second connecting assembly.

[0018] Preferably, a radial through hole is formed on the radial circumferential surface of the countersunk hole of the lower fixing ring; the connecting assembly further includes a third connecting assembly, which is used to connect the lower fixing ring and the combustion chamber housing; after installation, the third connecting assembly in the radial through hole interferes with the axial movement of the second connecting assembly in the axial through hole.

[0019] Preferably, the upper fixing ring has an upper fixing ring cold hole, and the lower fixing ring has a lower fixing ring cold hole; after the upper fixing ring and the lower fixing ring are installed, and after the lower fixing ring is installed with the fan-shaped disk, the upper fixing ring cold hole, the lower fixing ring cold hole and the main chamber cold air inlet are connected for cold air circulation.

[0020] As described above, the heat insulation plate and heat insulation plate fixing structure involved in this utility model have the following beneficial effects:

[0021] 1. The heat insulation plate and its fixing structure involved in this utility model are divided into several fan-shaped plates, and the fan-shaped plates can be detachably connected to the combustion chamber shell, allowing for partial replacement of the fan-shaped plates and improving product utilization.

[0022] 2. The heat insulation plate and its fixing structure involved in this utility model have a complex and efficient cooling structure in the fan-shaped plate body, which improves the cooling efficiency of the heat insulation plate, saves the amount of cooling air used, and further improves the efficiency of the unit.

[0023] 3. The heat insulation plate and heat insulation plate fixing structure involved in this utility model are fastened to the fan-shaped plate body and the lower fixing ring through the second connecting component, and the lower fixing ring is fastened to the combustion chamber shell through the third connecting component. After the third connecting component is installed, it interferes with the axial movement of the second connecting component, thereby enhancing the locking ability between the fan-shaped plate body and the combustion chamber shell and improving the safety and reliability of the combustion chamber operation. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the first angle installation of the heat insulation plate and the heat insulation plate fixing structure involved in this utility model;

[0025] Figure 2 This is a second-angle installation diagram of the heat insulation plate and the heat insulation plate fixing structure involved in this utility model;

[0026] Figure 3 This is an installation sectional view of the heat insulation plate and the heat insulation plate fixing structure involved in this utility model;

[0027] Figure 4 This is a spatial schematic diagram of the heat insulation plate and the heat insulation plate fixing structure involved in this utility model.

[0028] Figure 5 This is a first-angle spatial diagram of the upper fixing ring of the heat insulation plate and the heat insulation plate fixing structure involved in this utility model;

[0029] Figure 6 This is a second-angle spatial diagram of the upper fixing ring of the heat insulation plate and the heat insulation plate fixing structure involved in this utility model;

[0030] Figure 7 This is a first-angle spatial diagram of the lower fixing ring of the heat insulation plate and the heat insulation plate fixing structure involved in this utility model;

[0031] Figure 8 This is a second-angle spatial diagram of the lower fixing ring of the heat insulation plate and the heat insulation plate fixing structure involved in this utility model;

[0032] Figure 9 This is a schematic diagram of the installation of the lower fixing ring and the sector-shaped disk body in the heat insulation disk and heat insulation disk fixing structure involved in this utility model;

[0033] Figure 10 This is a schematic diagram showing the installation of the upper fixing ring, lower fixing ring, and fan-shaped disk body in the heat insulation disk and heat insulation disk fixing structure involved in this utility model;

[0034] Figure 11 This is a schematic diagram of the fan-shaped disk body in the heat insulation disk and heat insulation disk fixing structure involved in this utility model;

[0035] Figure 12This is a cross-sectional view of the fan-shaped disk body in the heat insulation disk and heat insulation disk fixing structure involved in this utility model.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1. Insulation plate; 101. Fan-shaped plate body; 2. Plate body cover; 3. Plate body base plate; 4. Far-heat curved panel; 5. Near-heat curved panel; 6. Lower fixing ring; 7. Sealing ring; 8. Upper fixing ring; 9. Second stud; 10. Second gasket; 11. Axial countersunk hole of lower fixing ring; 12. Bottom surface of axial countersunk hole of lower fixing ring; 13. Connecting hole of lower fixing ring; 14. Cold hole of lower fixing ring; 15. Countersunk hole of lower fixing ring; 16. Radial circumferential surface; 17. Axial through hole; 18. Radial through hole; 19. Insulation plate groove; 20. Insulation plate boss; 21. Reinforcing rib; 22. Main chamber cold air inlet; 23. Gap; 24. Upper surface of lower fixing ring; 25. Lower fixing ring 26. Lower surface of upper fixing ring; 27. Upper surface of upper fixing ring; 28. Lower surface of sealing ring; 29. ​​Sealing ring groove; 30. Upper fixing ring countersunk hole; 31. Bottom surface of upper fixing ring countersunk hole; 32. First stud; 33. First gasket; 34. Upper fixing ring through hole; 35. Upper fixing ring cold hole; 36. Third stud; 37. Third gasket; 38. Combustion chamber shell; 39. Shell threaded hole; 40. Heat insulation plate connection hole; 41. Cold air passage; 42. Main chamber; 43. Expansion chamber; 44. Inner ring cold air inlet; 45. Outer ring cold air inlet; 46. Circumferential outlet; 47. Inner ring outlet; 48. Outer ring outlet; 49. Vortex generator. Detailed Implementation

[0038] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0039] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are only for illustrative purposes and to aid those skilled in the art in understanding and reading the content disclosed herein. They are not intended to limit the implementation conditions of this utility model and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by this utility model, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of implementation of this utility model.

[0040] like Figures 1-12As shown, this utility model provides a heat insulation plate 1, which includes a plurality of fan-shaped plates 101. The plurality of fan-shaped plates 101 are detachably mounted on the combustion chamber shell 38, and there is a gap 23 between two adjacent fan-shaped plates 101. Each fan-shaped plate 101 includes a plate base 3 and a plate cover 2. The plate cover 2 is mounted on the plate base 3, and a main chamber 42 is provided between the plate cover 2 and the plate base 3. The plate base 3 has an outer ring outlet 48, an inner ring outlet 47, and a circumferential outlet 46, all of which are connected to the main chamber 42. The main chamber 42 is also connected to a main chamber cold air inlet 22. Cold air enters the main chamber 42 from the main chamber cold air inlet 22 and flows out from the outer ring outlet 48, the inner ring outlet 47, and the circumferential outlet 46, respectively, to cool the heat insulation plate 1.

[0041] The heat insulation plate 1 of this utility model is composed of several sector-shaped plates 101 joined together. When one sector-shaped plate 101 is damaged, only the damaged sector-shaped plate 101 needs to be replaced, without the need for overall replacement, thus improving product utilization. The sector-shaped plate 101 has an outer ring outlet 48, an inner ring outlet 47, and a circumferential outlet 46, which has a complex and efficient cooling structure, improving the cooling efficiency of the heat insulation plate 1, saving cooling air consumption, and further improving the unit efficiency.

[0042] Preferred, such as Figure 1 , Figure 11 , Figure 12 As shown, the disc substrate 3 includes a near-heating curved panel 5 close to the burner and a far-heating curved panel 4 away from the burner. An inner ring outlet 47 is disposed on the end face of the near-heating curved panel 5, an outer ring outlet 48 is disposed on the end face of the far-heating curved panel 4, and a circumferential outlet 46 is disposed on the end face of the relative gap 23 between the disc substrate 3. In this embodiment, the far-heating curved panel 4 extends in a horizontal plane, and the near-heating curved panel 5 extends obliquely upward in a vertical plane, that is, there is an included angle between the near-heating curved panel 5 and the far-heating curved panel 4. One end of the disc cover 2 is connected to the near-heating curved panel 5, and the other end is connected to the far-heating curved panel 4. At the same time, the included angle is covered by the disc cover 2. Thus, the near-heating curved panel 5, the far-heating curved panel 4, and the disc cover 2 form a main chamber 42.

[0043] Preferred, such as Figure 11 , Figure 12As shown, both the near-heat curved panel 5 and the far-heat curved panel 4 are provided with cold air channels 41. The main chamber 42 is connected to the outer ring outlet 48 and the inner ring outlet 47 through the cold air channels 41. A vortex generator 49 is provided in the cold air channel 41, and the vortex generator 49 is at a certain angle to the extension direction of the cold air channel 41. In this embodiment, the side of the main chamber 42 closest to the near-heat curved panel 5 is provided with an inner ring cold air inlet 44, which is connected to the inner ring outlet 47 through the cold air channel 41. The side of the main chamber 42 closest to the far-heat curved panel 4 is provided with an outer ring cold air inlet 45, which is connected to the outer ring outlet 48 through the cold air channel 41. The vortex generator 49 is a trapezoidal vortex generator, and the vortex generator 49 is at a certain angle to the extension direction of the cold air channel 41. When the cold air passes through the vortex generator 49, a vortex is formed, which carries away the heat at the edge of the vortex, improving the cooling efficiency of the heat insulation plate 1.

[0044] Preferred, such as Figures 9-12 As shown, the curved heat-insulating panel 4 also includes an extended chamber 43, which communicates with the cold air passage 41 within the curved heat-insulating panel 4; a reinforcing rib 21 is also provided on the curved heat-insulating panel 4. In this embodiment, the extended chamber 43 is used to reduce the length of the cold air passage at the distal end, thereby reducing flow resistance and improving the cooling efficiency of the heat-insulating plate 1. The reinforcing rib 21 on the curved heat-insulating panel 4 increases the structural rigidity of the fan-shaped plate 101, further improving the reliability of the structure.

[0045] To achieve the above or other objectives, this utility model also discloses a heat insulation plate fixing structure for fixing the aforementioned heat insulation plate 1, including an upper fixing ring 8, a lower fixing ring 6, a sealing ring 7, and a connecting assembly. The sealing ring 7 is disposed between the sealing ring groove 29 opened on the lower surface 26 of the upper fixing ring and the upper surface 24 of the lower fixing ring. The upper fixing ring 8 and the lower fixing ring 6, as well as the lower fixing ring 6 and the fan-shaped plate body 101, are connected by the connecting assembly.

[0046] Preferred, such as Figures 1-10 As shown, the connecting assembly includes a first connecting assembly for connecting the upper fixing ring 8 and the lower fixing ring 6; the upper surface 27 of the upper fixing ring has a plurality of upper fixing ring countersunk holes 30, and the upper fixing ring countersunk holes 30 have upper fixing ring through holes 34; the upper surface 24 of the lower fixing ring has a plurality of lower fixing ring connecting holes 13; the lower surface 26 of the upper fixing ring fits against the upper surface 24 of the lower fixing ring, and the upper fixing ring through holes 34 and the lower fixing ring connecting holes 13 are aligned and connected by the first connecting assembly.

[0047] In this embodiment, the number of countersunk holes 30, through holes 34, and connecting holes 13 in the upper fixing ring are all eight, and they are all arranged circumferentially in the upper fixing ring 8. The first connecting assembly includes a first washer 33 and a first stud 32, and the connecting hole 13 in the lower fixing ring is a threaded hole. The first washer 33 presses against the bottom surface 31 of the countersunk hole in the upper fixing ring, and the stud 32 passes through the through hole 34 in the upper fixing ring and is fastened to the connecting hole 13 in the lower fixing ring. The head of the stud 32 is located in the countersunk hole 30 in the upper fixing ring. In other embodiments, the number of countersunk holes 30, through holes 34, and connecting holes 13 in the upper fixing ring depends on the actual production.

[0048] Preferred, such as Figures 4-10 As shown, a sealing ring groove 29 is formed on the lower surface 26 of the upper fixing ring, and a sealing ring 7 is disposed between the sealing ring groove 29 on the lower surface 26 of the upper fixing ring and the upper surface 24 of the lower fixing ring. The lower surface 28 of the sealing ring fits against the upper surface 24 of the lower fixing ring. In this embodiment, the sealing ring 7 can cooperate with the burner.

[0049] Preferred, such as Figures 1-10 As shown, the connecting assembly includes a second connecting assembly for connecting the lower fixing ring 6 and the sector-shaped disk body 101. The upper surface 24 of the lower fixing ring has a lower fixing ring countersunk hole 15, the axial bottom surface of the lower fixing ring countersunk hole 15 has a lower fixing ring axial countersunk hole 11, the lower fixing ring axial countersunk hole 11 has an axial through hole 17, the lower surface 25 of the lower fixing ring has a heat insulation disk groove 19, the sector-shaped disk body 101 has a heat insulation disk boss 20, the heat insulation disk boss 20 has a heat insulation disk connecting hole 40; the heat insulation disk boss 20 is disposed in the heat insulation disk groove 19, and the axial through hole 17 is aligned with the heat insulation disk connecting hole 40 and connected by the second connecting assembly.

[0050] In this embodiment, there are four countersunk holes 15, four axial countersunk holes 11, and four axial through holes 17 in the lower fixing ring 6, all arranged circumferentially within the lower fixing ring 6. There are four sector-shaped discs 101, each with a heat insulation disc connection hole 40 aligned with the axial through hole 17. The second connecting assembly includes a second gasket 10 and a second stud 9. The heat insulation disc connection hole 40 is a threaded hole. The second gasket 10 presses against the bottom surface 12 of the axial countersunk hole in the lower fixing ring. The stud 9's column penetrates the axial countersunk hole 11 and is securely connected to the heat insulation disc connection hole 40. The head of the second stud 9 is located within the axial countersunk hole 11 of the lower fixing ring. In other embodiments, the number of countersunk holes 15, axial countersunk holes 11, axial through holes 17, and the number of sector-shaped discs 101 and heat insulation disc connection holes 40 depends on actual production requirements.

[0051] A heat insulation plate groove 19 is provided on the lower surface 25 of the lower fixing ring, and a heat insulation plate boss 20 is provided on the fan-shaped plate body 101. The heat insulation plate boss 20 is engaged in the heat insulation plate groove 19, thus achieving circumferential positioning of the fan-shaped plate body 101 and preventing the fan-shaped plate body 101 from axially deflecting.

[0052] Preferred, such as Figures 1-10 As shown, a radial through hole 18 is provided on the radial circumferential surface 16 of the lower fixed ring countersunk hole 15; the connecting assembly also includes a third connecting assembly, which is used to connect the lower fixed ring 6 and the combustion chamber housing 38; after installation, the third connecting assembly in the radial through hole 18 interferes with the axial movement of the second connecting assembly in the axial through hole 17.

[0053] In this embodiment, there are four radial through holes 18. The third connecting assembly includes a third gasket 37 and a third stud 36. Four housing threaded holes 39 are provided circumferentially on the combustion chamber housing 38. The third gasket 37 is pressed on the radial circumferential surface 16. The stud of the third stud 36 is radially connected to the housing threaded hole 39 by passing through the radial through hole 18. The head of the third stud 36 is located above the axial countersunk hole 11 of the lower fixing ring, that is, the third stud 36 prevents the movement of the second stud 9 in the axial direction.

[0054] Preferred, such as Figures 1-10 As shown, the upper fixing ring 8 has an upper fixing ring cold hole 35, and the lower fixing ring 6 has a lower fixing ring cold hole 14. After the upper fixing ring 8 and the lower fixing ring 6 are installed, and after the lower fixing ring 6 is installed with the fan-shaped disk 101, the upper fixing ring cold hole 35, the lower fixing ring cold hole 14, and the main chamber cold air inlet 22 are connected for cold air circulation. Furthermore, in this embodiment, the main chamber cold air inlet 22 is located next to the heat insulation disk connection hole 40, which can effectively cool the second connecting component and effectively prevent the second connecting component from loosening due to temperature fluctuations between the fan-shaped disk 101 and the lower fixing ring 6.

[0055] The working principle of the heat insulation plate 1 and the heat insulation plate fixing structure involved in this utility model is as follows:

[0056] First, the operator follows the instructions in the appendix. Figures 1-12 Based on the descriptions of the aforementioned components, each component is manufactured.

[0057] Next, the operator installs the various components into the combustion chamber housing 38. Specifically, the sealing ring 7 is placed in the sealing ring groove 29, and then the lower surface 26 of the upper fixing ring is fitted against the upper surface 24 of the lower fixing ring, with the inner diameter of the sealing ring 7 fitting the burner. The through hole 34 of the upper fixing ring is aligned with the connecting hole 13 of the lower fixing ring, and the two are connected by a first connecting assembly, thus securing the upper fixing ring 8 and the lower fixing ring 6. The heat insulation plate boss 20 is placed in the heat insulation plate groove 19, and simultaneously, the axial through hole 17 in the axial countersunk hole 11 of the lower fixing ring is aligned with the heat insulation plate connecting hole 40 and connected by a second connecting assembly, thus securing the lower fixing ring 6 to the sector-shaped disc 101. The radial through hole 18 is aligned with the housing threaded hole 39 and connected by a third connecting assembly, thus securing the lower fixing ring 6 to the combustion chamber housing 38.

[0058] Finally, when the burner is working, the sector-shaped disk 101 directly bears the high-temperature gas generated by the burner combustion, avoiding overheating of the combustion chamber wall structure. Cold air enters the main chamber 42 of the sector-shaped disk 101 from the upper fixed ring cold hole 35, the lower fixed ring cold hole 14, and the main chamber cold air inlet 22. Then, one stream of cold air flows out from the inner ring cold air inlet 44 and the cold air channel 41 through the inner ring outlet 47 to cool the near-heated curved panel 5; another stream of cold air flows out from the outer ring cold air inlet 45 and the cold air channel 41 through the outer ring outlet 48 to cool the far-heated curved panel 4; and yet another stream of cold air flows out from the circumferential outlet 46 to cool the end face of the relative gap 23 of the disk substrate 3.

[0059] The heat insulation plate 1 and the heat insulation plate fixing structure involved in this utility model have the following beneficial effects:

[0060] 1. The first connecting component, the second connecting component, and the third connecting component in this utility model all include gaskets to prevent loosening. At the same time, after the third connecting component is installed, it interferes with the axial movement of the second connecting component, effectively preventing the connection between the sector disc 101 and the lower fixing ring 6 from becoming loose.

[0061] 2. In this utility model, the cold air enters the main chamber 42 of the fan-shaped disk 101 through the upper fixed ring cold hole 35, the lower fixed ring cold hole 14, and the main chamber cold air inlet 22, and then flows out from the inner ring outlet 47, the outer ring outlet 48 and the circumferential outlet 46 connected to the main chamber 42, which can effectively cool the fan-shaped disk 101 and has a good cooling effect.

[0062] 3. The heat insulation plate 1 in this utility model includes several sector-shaped plates 101. When a sector-shaped plate 101 fails, only the corresponding sector-shaped plate 101 needs to be replaced. Compared with the integrated heat insulation plate 1 structure in the prior art, it improves the utilization rate of the product and reduces the cost of use. At the same time, each sector-shaped plate 101 can be designed with a more complex and efficient cooling structure, reducing the amount of cooling air used and improving the efficiency of the unit.

[0063] 4. In this utility model, there is a gap 23 between the multiple fan-shaped discs 101, which releases the circumferential stress. At the same time, the fan-shaped disc 101 is provided with a heat insulation plate protrusion 20 that cooperates with the heat insulation plate groove 19 on the lower fixing ring 6, which effectively prevents the fan-shaped disc 101 from rotating circumferentially.

[0064] 5. The sector-shaped disk 101 in this utility model is provided with reinforcing ribs 21, which increases the structural strength of the sector-shaped disk 101 and further improves the reliability of the sector-shaped disk 101.

[0065] 6. The heat insulation plate fixing structure in this utility model is divided into an upper fixing ring 8 and a lower fixing ring 6. The structure is simple and easy to process and manufacture. It also facilitates the installation and disassembly of the fan-shaped plate body 101. The sealing ring 7 is used to cooperate with the burner.

[0066] 7. In this utility model, the main chamber cold air inlet 22 is located next to the heat insulation plate connection hole 40, which can effectively cool the second connecting component and effectively prevent the second connecting component between the fan-shaped plate 101 and the lower fixing ring 6 from loosening. At the same time, the third connecting component is located on the upper side of the second connecting component to interfere with the axial movement of the second connecting component, avoid the second connecting component from loosening, and improve the safety and reliability of the combustion chamber operation.

[0067] Therefore, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0068] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A heat insulation plate, characterized in that: The heat insulation plate (1) includes several sector-shaped plates (101), which are detachably mounted on the combustion chamber shell (38), and there is a gap (23) between two adjacent sector-shaped plates (101); the sector-shaped plate (101) includes a plate base plate (3) and a plate cover (2), the plate cover (2) is mounted on the plate base plate (3), and a main chamber (42) is provided between the plate cover (2) and the plate base plate (3). The plate substrate (3) is provided with an outer ring outlet (48), an inner ring outlet (47) and a circumferential outlet (46). The outer ring outlet (48), the inner ring outlet (47) and the circumferential outlet (46) are all connected to the main chamber (42). The main chamber (42) is also connected to a main chamber cold air inlet (22). Cold air enters the main chamber (42) from the main chamber cold air inlet (22) and flows out from the outer ring outlet (48), the inner ring outlet (47) and the circumferential outlet (46) respectively to cool the heat insulation plate (1).

2. The heat insulation plate according to claim 1, characterized in that: The disk substrate (3) includes a near-heat curved panel (5) close to the burner and a far-heat curved panel (4) away from the burner. The inner ring outlet (47) is located on the end face of the near-heat curved panel (5), the outer ring outlet (48) is located on the end face of the far-heat curved panel (4), and the circumferential outlet (46) is located on the end face of the relative gap (23) of the disk substrate (3).

3. The heat insulation plate according to claim 2, characterized in that: Both the near-heat curved panel (5) and the far-heat curved panel (4) are provided with cold air channels (41). The main chamber (42) is connected to the outer ring outlet (48) and the inner ring outlet (47) through the cold air channels (41). A vortex generator (49) is provided in the cold air channels (41). The vortex generator (49) is at a certain angle to the extension direction of the cold air channels (41).

4. The heat insulation plate according to claim 3, characterized in that: The far-heat curved panel (4) is also provided with an expansion chamber (43), which is connected to the cold air channel (41) in the far-heat curved panel (4); the far-heat curved panel (4) is also provided with a reinforcing rib (21).

5. A heat insulation plate fixing structure for fixing the heat insulation plate (1) according to any one of claims 1-4, characterized in that: It includes an upper fixing ring (8), a lower fixing ring (6), a sealing ring (7) and a connecting assembly. The sealing ring (7) is disposed between the sealing ring groove (29) opened on the lower surface (26) of the upper fixing ring and the upper surface (24) of the lower fixing ring. The upper fixing ring (8) and the lower fixing ring (6) are connected by the connecting assembly, and the lower fixing ring (6) and the sector-shaped disk (101) are connected by the connecting assembly.

6. The heat insulation plate fixing structure according to claim 5, characterized in that: The connecting assembly includes a first connecting assembly for connecting an upper fixing ring (8) and a lower fixing ring (6); the upper surface (27) of the upper fixing ring is provided with a plurality of upper fixing ring countersunk holes (30), and the upper fixing ring through holes (34) are provided in the upper fixing ring countersunk holes (30); the upper surface (24) of the lower fixing ring is provided with a plurality of lower fixing ring connecting holes (13); the lower surface (26) of the upper fixing ring is fitted with the upper surface (24) of the lower fixing ring, and the upper fixing ring through holes (34) and the lower fixing ring connecting holes (13) are aligned and connected by the first connecting assembly.

7. The heat insulation plate fixing structure according to claim 6, characterized in that: A sealing ring groove (29) is provided on the lower surface (26) of the upper fixing ring, and the sealing ring (7) is disposed in the sealing ring groove (29).

8. The heat insulation plate fixing structure according to claim 5, characterized in that: The connecting assembly includes a second connecting assembly for connecting the lower fixing ring (6) and the fan-shaped disk body (101); the upper surface (24) of the lower fixing ring is provided with a lower fixing ring countersunk hole (15), the axial bottom surface of the lower fixing ring countersunk hole (15) is provided with a lower fixing ring axial countersunk hole (11), the axial countersunk hole (11) of the lower fixing ring is provided with an axial through hole (17), the lower surface (25) of the lower fixing ring is provided with a heat insulation disk groove (19), the fan-shaped disk body (101) is provided with a heat insulation disk boss (20), the heat insulation disk boss (20) is provided with a heat insulation disk connecting hole (40); the heat insulation disk boss (20) is provided in the heat insulation disk groove (19), and the axial through hole (17) and the heat insulation disk connecting hole (40) are aligned and connected by the second connecting assembly.

9. The heat insulation plate fixing structure according to claim 8, characterized in that: A radial through hole (18) is provided on the radial circumferential surface (16) of the lower fixed ring countersunk hole (15); the connecting assembly also includes a third connecting assembly, which is used to connect the lower fixed ring (6) and the combustion chamber housing (38); after the third connecting assembly in the radial through hole (18) is installed, it interferes with the axial movement of the second connecting assembly in the axial through hole (17).

10. The heat insulation plate fixing structure according to claim 5, characterized in that: The upper fixing ring (8) has an upper fixing ring cold hole (35), and the lower fixing ring (6) has a lower fixing ring cold hole (14). After the upper fixing ring (8) and the lower fixing ring (6) are installed, and after the lower fixing ring (6) is installed with the fan-shaped disk (101), the upper fixing ring cold hole (35), the lower fixing ring cold hole (14) and the main chamber cold air inlet (22) are connected for cold air circulation.

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