Inner wall assembly for particle separator and aero-engine

Abstract

The invention discloses an inner wall assembly for a particle separator and an aero-engine, comprising a first outer wall layer arranged on a windward runner surface, a second outer wall layer arranged on a back runner surface, an inner wall layer arranged on the inner side, an interlayer arranged between the first outer wall layer and the inner wall layer, a first mounting edge and a second mounting edge, the first end of the first outer wall layer, the first end of the interlayer and the first end of the inner wall layer are installed on the first installation edge, the second end of the interlayer and the second end of the first outer wall layer are connected with the first end of the second outer wall layer, and the second end of the second outer wall layer and the second end of the inner wall layer are installed on the second installation edge. The second mounting edge is provided with a first air entraining structure which is used for introducing anti-icing hot air into the inner wall assembly; a first air entraining cavity is formed between the second outer wall layer and the inner wall layer, a second air entraining cavity is formed between the interlayer and the inner wall layer, a third air entraining cavity is formed between the interlayer and the first outer wall layer, and the interlayer is provided with a second air entraining structure used for leading anti-icing hot air in the second air entraining cavity to the third air entraining cavity.

Description

Technical Field

[0001] The present invention relates to the technical field of aircraft engines, and in particular, to an inner wall component for a particle separator. In addition, the present invention also relates to an aircraft engine comprising the inner wall component for a particle separator. Background Art

[0002] Helicopters often need to take off, land and hover in some special sandy and foggy environments, such as in mountainous areas, deserts, on ice and snow, and on the sea. A large amount of sand, dust, ice, snow and other foreign objects or sea salt spray are sucked into the engine. If no protective measures are taken in advance, the dust and sand will cause serious damage to the helicopter engine, compressor blade abrasion and the resulting deterioration of engine performance, resulting in power reduction, increased fuel consumption, and ultimately a significant shortening of the engine's service life. Therefore, an air intake protection device, a particle separator, needs to be added to the front end of the engine to protect the engine, which can ensure its working stability and extend its service life in working environments such as sand and dust. Practice has proved that the life of an engine with a particle separator installed is more than 10 times longer than that of an engine without a particle separator installed.

[0003] The integral inertial particle separator is mainly composed of structures with pre-rotation blades and without blades. The working principle of the integral inertial particle separator is to use the different inertial forces generated by sand and dust particles when turning in the curved flow channel to throw the solid phase particles with greater inertial force to the periphery and discharge them from the peripheral cleaning flow channel. In this process, the windward side of the arched inner flow channel of the particle separator is subjected to a large amount of sand and dust, and only a small amount of sand and dust collide with the leeward side. For the particle separator with pre-rotation blades, its blades make the air entering the particle separator flow channel and the foreign matter contained therein obtain circumferential velocity. Under the action of inertia, foreign matter with a larger mass is thrown to the outer wall of the flow channel and enters the cleaning flow and then discharged outside the machine. Compared with the particle separator with blades, the integral particle separator without blades has a relatively simple structure, lighter weight and lower cost, but the internal flow channel will be steeper to provide particles with greater centrifugal force and be thrown to the periphery, so that the particles are concentrated and discharged from the peripheral cleaning flow channel. Due to its steep hump-shaped internal flow channel design and large windward area, the engine is more likely to freeze when working in a low-temperature environment, and the engine inhaling ice will cause negative effects such as reduced engine efficiency. Therefore, the bladeless particle separator needs to have a certain anti-icing function. The structural form in the prior art mostly adopts a single anti-icing hot air channel design, that is, a cavity is formed inside the inner wall component to pass the hot air drawn from the compressor, and the heat exchange between the hot air and the cold wall surface is realized to achieve the anti-icing function at low temperatures.

[0004] In order to meet the design requirements of the overall structure and function of the engine under special working conditions, the inner flow channel wall needs to have an anti-icing function. The existing design often adopts a single anti-icing hot gas channel design, that is, the hot gas first enters the component from the hot gas channel inlet at the rear end of the component, passes through the internal cavity of the inner wall component, heats the flow channel wall, and then enters the main flow channel from the hot gas channel outlet at the front end of the component. Although it meets the functional requirements, there are problems such as a small bonding surface at the front end of the component, low overall structural strength, and the drawn hot gas will have a certain impact on the main flow. Summary of the invention

[0005] The present invention provides an inner wall component for a particle separator and an aircraft engine to solve the technical problems of poor heat exchange effect, low structural strength and bleed air affecting the mainstream in the single anti-icing hot gas channel of the bladeless particle separator in the prior art.

[0006] According to one aspect of the present invention, there is provided an inner wall assembly for a particle separator, comprising a first outer wall layer arranged on a windward flow channel surface of the particle separator and matching the shape of a corresponding position of an inner flow channel of the particle separator, a second outer wall layer arranged on a leeward flow channel surface of the particle separator and matching the shape of a corresponding position of the inner flow channel of the particle separator, an inner wall layer arranged on the inner side of the inner wall assembly, an interlayer arranged between the first outer wall layer and the inner wall layer, a first mounting edge arranged at a first end of the inner wall assembly, and a second mounting edge arranged at a second end of the inner wall assembly, wherein the first end of the first outer wall layer, the first end of the interlayer, and the first end of the inner wall layer are mounted on the first mounting edge, and the second end of the interlayer and the second end of the first outer wall layer are mounted on the first mounting edge. They are respectively connected with the first end of the second outer wall layer, and the second end of the second outer wall layer and the second end of the inner wall layer are respectively installed on the second installation edge; the second installation edge is provided with a first air induction structure for introducing anti-icing hot air into the inner wall component; a first air induction cavity connected to the first air induction structure is formed between the second outer wall layer and the inner wall layer, a second air induction cavity connected to the first air induction cavity is formed between the interlayer and the inner wall layer, a third air induction cavity is formed between the interlayer and the first outer wall layer, the interlayer is provided with a second air induction structure for introducing the anti-icing hot air in the second air induction cavity to the third air induction cavity, and the third air induction structure is formed at the connection position between the first outer wall layer and the second outer wall layer, for introducing the anti-icing hot air in the third air induction cavity to the main flow channel.

[0007] As a further improvement of the above technical solution, a first support rib is axially arranged on the outer surface of the interlayer, and a plurality of the first support ribs are evenly distributed circumferentially along the outer surface of the interlayer; a second support rib is axially arranged on the outer surface of the inner wall layer, and a plurality of the second support ribs are evenly distributed circumferentially along the outer surface of the inner wall layer.

[0008] As a further improvement of the above technical solution, the circumferential distribution positions of the first support ribs and the second support ribs match, and fixing parts are provided through the first outer wall layer, the interlayer, and the inner wall layer corresponding to the circumferential positions of the first support ribs and the second support ribs.

[0009] As a further improvement of the above technical solution, the outer surface of the first end of the second outer wall layer protrudes to form a first supporting boss, and a plurality of the first supporting bosses are evenly distributed along the circumference of the second outer wall layer. The first supporting boss is used to support the inner wall of the second end of the first outer wall layer, and the inner wall of the first outer wall layer, the outer wall of the second outer wall layer and the space between two adjacent first supporting bosses form the third air inlet structure.

[0010] As a further improvement of the above technical solution, a second supporting boss is protruded from the outer surface of the inner wall layer corresponding to the connection position between the interlayer and the second outer wall layer, and a plurality of the second supporting bosses are evenly distributed along the circumference of the inner wall layer. The second supporting boss is used to support the second end inner wall of the interlayer. The inner wall of the interlayer, the outer wall of the inner wall layer and two adjacent second supporting bosses form an air flow channel, so that the first air induction cavity and the second air induction cavity are connected.

[0011] As a further improvement of the above technical solution, the positions of the first supporting boss and the second supporting boss match, and fixing parts are penetrated through the positions of the first outer wall layer, the second outer wall layer, the interlayer and the inner wall layer corresponding to the first supporting boss.

[0012] As a further improvement of the above technical solution, the thickness of the first outer wall layer is 0.75-0.85 mm, the thickness of the interlayer is 1.2-1.5 mm, and the thickness of the inner wall layer is 1.2-1.5 mm.

[0013] As a further improvement of the above technical solution, the cross-sectional area of ​​the first air introduction cavity gradually decreases from the second end to the first end.

[0014] As a further improvement of the above technical solution, the first mounting edge, the second mounting edge and the first outer wall layer are made of metal material, and the interlayer, the inner wall layer and the second outer wall layer are made of composite material.

[0015] According to another aspect of the present invention, there is also provided an aircraft engine, comprising a particle separator, which comprises the inner wall assembly for a particle separator.

[0016] The present invention has the following beneficial effects:

[0017] The inner wall component is arranged at a hump-shaped position of the inner surface of the flow channel of the particle separator, and the first installation edge and the second installation edge are respectively connected with the inner surface. By respectively arranging a first outer wall layer located on the windward flow channel surface and a second outer wall layer located on the leeward flow channel surface, it can be manufactured based on different materials according to different impact resistance requirements and weight reduction requirements, thereby ensuring functional application while optimizing the overall weight. Based on the outer wall structure being divided into a first outer wall layer and a second outer wall layer, an interlayer is arranged between the inner wall layer and the first outer wall layer, and a second air induction structure is arranged in the interlayer. The first air induction structure of the second installation edge introduces hot air from the compressor into the first air induction cavity and the second air induction cavity, and then the interlayer The second air inlet structure is guided to the third air inlet cavity between the first outer wall layer and the interlayer. The setting of the interlayer separates and compresses the space between the first outer wall layer and the inner wall layer, thereby increasing the airflow velocity, strengthening the convective heat exchange, and improving the heat exchange effect. When the hot air in the second air inlet cavity enters the third air inlet cavity through the second air inlet structure, a jet impact is simultaneously generated on the first outer wall layer, thereby further improving the anti-icing effect of the first outer wall layer, optimizing its anti-icing capability in a targeted manner, and effectively improving the resistance and anti-icing capabilities of the first outer wall layer which is the main impact area and prone to icing. The air is discharged through the third air inlet structure, and its exhaust direction is the same as that of the mainstream and then mixed with the mainstream, thereby effectively avoiding affecting the mainstream.

[0018] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 is a schematic structural diagram of a particle separator according to a preferred embodiment of the present invention;

[0021] Figure 2 is a schematic structural diagram of an inner wall assembly according to a preferred embodiment of the present invention;

[0022] Figure 3 is a cross-sectional view of an inner wall assembly of a preferred embodiment of the present invention;

[0023] Figure 4 Schematic diagram of the air entrainment of the inner wall assembly of the preferred embodiment of the present invention Figure 1 ;

[0024] Figure 5 yes Figure 4 A partial enlarged view of

[0025] Figure 6 is a schematic structural diagram of the interlayer of a preferred embodiment of the present invention;

[0026] Figure 7 is a schematic structural diagram of the inner wall layer of a preferred embodiment of the present invention;

[0027] Figure 8 The inner wall assembly air entrainment diagram of the preferred embodiment of the present invention is Figure 2 ;

[0028] Fig. 9 The inner wall assembly air entrainment diagram of the preferred embodiment of the present invention is Figure 3 .

[0029] Legend:

[0030] 1. First mounting edge; 2. First outer wall layer; 3. Interlayer; 4. Inner wall layer; 5. Second outer wall layer; 6. Partition; 7. Second mounting edge; 8. Rivet; 9. First supporting rib; 10. Second air inlet structure; 11. Second supporting rib; 12. First supporting boss; 13. First air inlet structure; 14. Third air inlet structure. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0032] like Figures 1 to 9 As shown, the inner wall component for the particle separator of the present embodiment includes a first outer wall layer 2 which is arranged on the windward flow channel surface of the particle separator and matches the shape of the corresponding position of the inner flow channel of the particle separator, a second outer wall layer 5 which is arranged on the leeward flow channel surface of the particle separator and matches the shape of the corresponding position of the inner flow channel of the particle separator, an inner wall layer 4 which is arranged on the inner side of the inner wall component, an interlayer 3 which is arranged between the first outer wall layer 2 and the inner wall layer 4, a first mounting edge 1 which is arranged at the first end of the inner wall component, and a second mounting edge 7 which is arranged at the second end of the inner wall component, wherein the first end of the first outer wall layer 2, the first end of the interlayer 3, and the first end of the inner wall layer 4 are mounted on the first mounting edge 1, and the second end of the interlayer 3 and the second end of the first outer wall layer 2 are respectively The first end of the second outer wall layer 5 is connected, and the second end of the second outer wall layer 5 and the second end of the inner wall layer 4 are respectively installed on the second installation edge; the second installation edge 7 is provided with a first air induction structure 13, which is used to introduce anti-icing hot air into the inner wall assembly; a first air induction cavity connected to the first air induction structure 13 is formed between the second outer wall layer 5 and the inner wall layer 4, a second air induction cavity connected to the first air induction cavity is formed between the interlayer 3 and the inner wall layer 4, a third air induction cavity is formed between the interlayer 3 and the first outer wall layer 2, and the interlayer 3 is provided with a second air induction structure 10, which is used to guide the anti-icing hot air in the second air induction cavity to the third air induction cavity, and a third air induction structure 14 is formed at the connection position between the first outer wall layer 2 and the second outer wall layer 5, which is used to guide the anti-icing hot air in the third air induction cavity to the main flow channel.

[0033] Among them, the particle separator used in the inner wall component of this embodiment is a bladeless integral inertial particle separator. The first outer wall layer 2 matches the windward surface of the inner surface of the flow channel in the particle separator, and needs to withstand erosion and impact of foreign objects such as sand and dust. However, due to space limitations and heat transfer requirements, the wall thickness of the windward flow channel surface is designed to be thinner. Based on this, the first outer wall layer 2 is made of metal material, preferably titanium alloy, to improve its ability to resist sand and dust abrasion and foreign body impact. In one embodiment, the first mounting edge 1, the second mounting edge 7 and the first outer wall layer 2 are all made of metal material, Layer 3, inner wall layer 4, and second outer wall layer 5 are made of composite materials; it should be noted that the interlayer 3, inner wall layer 4, and second outer wall layer 5 use composite materials instead of metal parts, making full use of the light weight and high strength of composite materials to meet functional requirements while greatly reducing the overall weight of the components; on the other hand, the first outer wall layer 2 is a position that is prone to ice formation under low temperature conditions. Since metal materials have good thermal conductivity and higher heat exchange efficiency than composite materials, the temperature of the first outer wall is higher, and the hot air introduced from the compressor has a better heating effect on the first outer wall layer 2, effectively improving the anti-icing effect of the component.

[0034] It can be understood that the inner wall component is arranged at a hump-shaped position of the inner surface of the flow channel of the particle separator, and the first mounting edge 1 and the second mounting edge 7 are respectively connected to the inner surface. By respectively arranging a first outer wall layer 2 located on the windward flow channel surface and a second outer wall layer 5 located on the leeward flow channel surface, each part can be manufactured based on different materials according to different impact resistance requirements and weight reduction requirements, thereby ensuring functional application while optimizing the overall weight. Based on the outer wall structure being divided into the first outer wall layer 2 and the second outer wall layer 5, an interlayer 3 is arranged between the inner wall layer 4 and the first outer wall layer 2, and a second air induction structure 10 is arranged in the interlayer 3, and the first air induction structure 13 of the second mounting edge 7 introduces hot air from the compressor into the first air induction cavity and the second air induction cavity. , and then guided to the third air inlet cavity between the first outer wall layer 2 and the interlayer 3 by the second air inlet structure 10 of the interlayer 3. The setting of the interlayer 3 separates and compresses the space between the first outer wall layer 2 and the inner wall layer 4, thereby increasing the air flow velocity, strengthening the convective heat exchange, and improving the heat exchange effect. When the hot air in the second air inlet cavity enters the third air inlet cavity through the second air inlet structure 10, it simultaneously generates a jet impact on the first outer wall layer 2, further improving the anti-icing effect of the first outer wall layer 2, optimizing its anti-icing ability in a targeted manner, and effectively improving the resistance and anti-icing ability of the first outer wall layer 2 which is the main impact area and prone to icing; the air is discharged through the third air inlet structure 14, and its exhaust direction is the same as the mainstream and then mixed with the mainstream, effectively avoiding affecting the mainstream.

[0035] It should be noted that the first air inlet structure 13 is a strip air inlet groove opened along the circumferential direction on the second mounting edge 7, and the plurality of air inlet grooves are evenly distributed along the circumference of the second mounting edge 7; the second air inlet structure 10 is evenly distributed air inlet holes arranged on the interlayer 3, which guide the hot air in the second air inlet cavity to the third air inlet cavity; the air inlet holes are preferably arranged perpendicular to the surface direction of the interlayer 3 to form a jet to the first outer wall layer 2 to improve the anti-icing effect.

[0036] In one embodiment, the cross-sectional area of ​​the first air inlet cavity gradually decreases from the second end to the first end to increase the flow rate of the introduced hot air, further increase the flow rate of the hot air introduced by the second air inlet structure 10, and improve the jet effect; similarly, the second air inlet cavity and the third air inlet cavity can also be designed to have a cross-sectional area that gradually decreases along the air inlet direction.

[0037] In one embodiment, the outer surface of the interlayer 3 is provided with a first support rib 9 along the axial direction, and a plurality of first support ribs 9 are evenly distributed along the circumference of the outer surface of the interlayer 3; the outer surface of the inner wall layer 4 is provided with a second support rib 11 along the axial direction, and a plurality of second support ribs 11 are evenly distributed along the circumference of the outer surface of the inner wall layer 4. The first support rib 9 is provided to support the inner surface of the first outer wall layer 2, thereby ensuring the cavity structure of the third air induction cavity and guiding the airflow; similarly, the second support rib 11 is supported on the inner surface of the interlayer 3 to realize the cavity structure of the second air induction cavity and guide the airflow; a circumferentially evenly distributed partition plate 6 is provided between the inner wall layer 4 and the second outer wall layer 5 for support, thereby ensuring the cavity structure of the first air induction cavity and guiding the airflow;

[0038] Furthermore, the circumferential distribution positions of the first support rib 9 and the second support rib 11 match, and fixings are provided on the first outer wall layer 2, the interlayer 3, and the inner wall layer 4 corresponding to the circumferential positions of the first support rib 9 and the second support rib 11, wherein the fixings are rivets 8 and sealants, and the multi-layer structure of the front end of the inner wall component is realized based on the arrangement of the first support ribs 9 and the second support ribs 11. The multi-layer structure is connected and fixed by rivets 8 and sealants, and the connection method is relatively simple, which reduces the manufacturing difficulty, and increases the structural strength of the entire part while improving the process feasibility.

[0039] In one embodiment, a first supporting boss 12 is protruded from the outer surface of the first end of the second outer wall layer 5, and a plurality of first supporting bosses 12 are evenly distributed along the circumference of the second outer wall layer 5. The first supporting boss 12 is used to support the inner wall of the second end of the first outer wall layer 2. The inner wall of the first outer wall layer 2, the outer wall of the second outer wall layer 5, and the two adjacent first supporting bosses 12 together form an air outlet groove, i.e., a third air induction structure 14; similarly, a second supporting boss is protruded from the outer surface of the inner wall layer 4 corresponding to the connection position between the interlayer 3 and the second outer wall layer 5. A plurality of second supporting bosses are evenly distributed along the circumference of the inner wall layer 4. The second supporting boss is used to support the inner wall of the second end of the interlayer 3. The inner wall of the interlayer 3, the outer wall of the inner wall layer 4, and the two adjacent second supporting bosses together form an air flow channel, so that the first air induction cavity and the second air induction cavity are connected;

[0040] Furthermore, the positions of the first supporting boss 12 and the second supporting boss are matched, and the first outer wall layer 2, the second outer wall layer 5, the interlayer 3 and the inner wall layer 4 are provided with fixing parts corresponding to the positions of the first supporting boss 12. The first outer wall layer 2, the second outer wall layer 5, the interlayer 3 and the inner wall layer 4 are further firmly fixed by setting the supporting bosses, so as to ensure the connection between the first air inlet cavity and the second air inlet cavity and the stability of the exhaust channel of the third air inlet structure 14; the fixing parts are rivets 8 and sealants, and the multi-layer structure is connected and fixed by rivets 8 and sealants. The connection method is relatively simple, which reduces the manufacturing difficulty, and increases the structural strength of the entire part while improving the process feasibility;

[0041] On the other hand, the first end of the interlayer 3 is bent toward the inner surface direction to fit the surface of the first mounting edge 1, and the first end of the inner wall layer 4 is bent toward the outer surface direction to fit the surface of the first mounting edge 1. The bent parts of the interlayer 3 and the inner wall layer 4 are overlapped and fit the surface of the first mounting edge 1. The bent parts of the two and the first mounting edge 1 are also evenly distributed along the circumferential direction. Fixing parts are arranged, that is, rivets 8 are penetrated and fixed with sealant; the second end of the second outer wall layer 5 and the second end of the inner wall layer 4 are overlapped with the second mounting edge 7 at both ends to avoid interference with the first air ducting structure 13.

[0042] In one embodiment, the thickness of the first outer wall layer 2 is 0.75-0.85 mm, and is usually about 0.8 mm in practice. The thickness of the interlayer 3 is 1.2-1.5 mm, and the thickness of the inner wall layer 4 is 1.2-1.5 mm. The surface finish of the particle separator flow channel surface should not be greater than Ra3.2 to ensure a small airflow loss.

[0043] On the other hand, the preferred embodiment further provides an aircraft engine, including a particle separator, to which the above-mentioned inner wall component for the particle separator is applied.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An inner wall component for a particle separator, characterized in that: The invention comprises a first outer wall layer (2) arranged on the windward flow channel surface of the particle separator and matching the shape of the corresponding position of the inner flow channel of the particle separator, a second outer wall layer (5) arranged on the leeward flow channel surface of the particle separator and matching the shape of the corresponding position of the inner flow channel of the particle separator, an inner wall layer (4) arranged on the inner side of the inner wall component, an interlayer (3) arranged between the first outer wall layer (2) and the inner wall layer (4), a first mounting edge (1) arranged at the first end of the inner wall component, and a second mounting edge (7) arranged at the second end of the inner wall component, wherein the first end of the first outer wall layer (2), the first end of the interlayer (3) and the first end of the inner wall layer (4) are mounted on the first mounting edge (1), and the second end of the interlayer (3) and the second end of the first outer wall layer (2) are respectively connected to the first end of the second outer wall layer (5). The second end of the second outer wall layer (5) and the second end of the inner wall layer (4) are respectively mounted on the second mounting edge; the second mounting edge (7) is provided with a first air induction structure (13) for introducing anti-icing hot air into the inner wall component; a first air induction cavity connected to the first air induction structure (13) is formed between the second outer wall layer (5) and the inner wall layer (4); a second air induction cavity connected to the first air induction cavity is formed between the interlayer (3) and the inner wall layer (4); a third air induction cavity is formed between the interlayer (3) and the first outer wall layer (2); a second air induction structure (10) is provided on the interlayer (3) for introducing the anti-icing hot air in the second air induction cavity to the third air induction cavity; a third air induction structure (14) is formed at the connection position between the first outer wall layer (2) and the second outer wall layer (5) for introducing the anti-icing hot air in the third air induction cavity to the main flow channel.

2. The inner wall assembly for a particle separator according to claim 1, characterized in that: The outer surface of the interlayer (3) is provided with a first support rib (9) along the axial direction, and a plurality of the first support ribs (9) are evenly distributed along the circumference of the outer surface of the interlayer (3); the outer surface of the inner wall layer (4) is provided with a second support rib (11) along the axial direction, and a plurality of the second support ribs (11) are evenly distributed along the circumference of the outer surface of the inner wall layer (4).

3. The inner wall assembly for a particle separator according to claim 2, characterized in that: The circumferential distribution positions of the first supporting rib (9) and the second supporting rib (11) match, and fixing parts are provided through the first outer wall layer (2), the interlayer (3), and the inner wall layer (4) corresponding to the circumferential positions of the first supporting rib (9) and the second supporting rib (11).

4. The inner wall assembly for a particle separator according to claim 1, characterized in that: The outer surface of the first end of the second outer wall layer (5) protrudes to form a first supporting boss (12), and a plurality of the first supporting bosses (12) are evenly distributed along the circumference of the second outer wall layer (5). The first supporting boss (12) is used to support the inner wall of the second end of the first outer wall layer (2), and the inner wall of the first outer wall layer (2), the outer wall of the second outer wall layer (5) and the space between two adjacent first supporting bosses (12) form the third air induction structure (14).

5. The inner wall assembly for a particle separator according to claim 4, characterized in that: The outer surface of the inner wall layer (4) is provided with a second supporting boss protruding at a connection position corresponding to the interlayer (3) and the second outer wall layer (5), and a plurality of the second supporting bosses are evenly distributed along the circumference of the inner wall layer (4). The second supporting boss is used to support the inner wall of the second end of the interlayer (3). The inner wall of the interlayer (3), the outer wall of the inner wall layer (4) and two adjacent second supporting bosses form an air flow channel, so that the first air induction cavity and the second air induction cavity are connected.

6. The inner wall assembly for a particle separator according to claim 5, characterized in that: The position of the first supporting boss (12) matches that of the second supporting boss, and fixing parts are provided through the first outer wall layer (2), the second outer wall layer (5), the interlayer (3) and the inner wall layer (4) at positions corresponding to the first supporting boss (12).

7. The inner wall assembly for a particle separator according to any one of claims 1 to 6, characterized in that: The first outer wall layer The thickness of the (2) is 0.75-0.85 mm, the thickness of the interlayer (3) is 1.2-1.5 mm, and the thickness of the inner wall layer (4) is for 1.2-1.5mm.

8. The inner wall assembly for a particle separator according to any one of claims 1 to 6, characterized in that: The cross-sectional area of ​​the first air inlet cavity gradually decreases from the second end to the first end.

9. The inner wall assembly for a particle separator according to any one of claims 1 to 6, characterized in that: The first mounting edge (1), the second mounting edge (7) and the first outer wall layer (2) are made of metal material, and the interlayer (3), the inner wall layer (4) and the second outer wall layer (5) are made of composite material.

10. An aircraft engine, characterized in that: It comprises a particle separator, and is applied with the inner wall component for the particle separator as claimed in any one of claims 1 to 9.

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