Particle separator ice prevention structure and aircraft engine

Abstract

The application discloses an ice-preventing structure of a particle separator and an aero-engine. The particle separator comprises a central body coaxially arranged with an air intake casing, an outer shell and a separation lip. An air inlet channel is formed between the central body and the outer shell. The separation lip is arranged at the tail end of the particle separator and in the air intake casing. The separation lip comprises a first outer wall and a first inner wall. The central body comprises a second inner wall and a second outer wall. A main flow channel front end is formed between the first inner wall and the outer wall of the central body, and the main flow channel front end is communicated with the air inlet channel and the air intake casing. A cleaning flow channel is formed between the first outer wall and the inner wall of the outer shell. The separation lip is used for separating the airflow of the air inlet channel and then guiding the airflow to the cleaning flow channel and the main flow channel respectively. The ice-preventing structure comprises an air bleed structure arranged in the air intake casing and used for guiding the ice-preventing gas to the separation lip. The air bleed structure is also used for guiding the ice-preventing gas into the interlayer channel between the second inner wall and the second outer wall.

Description

Technical Field

[0001] This invention relates to the field of aero-engine technology, and in particular, to an anti-icing structure for a particle separator. Furthermore, this invention also relates to an aero-engine including the aforementioned anti-icing structure for a particle separator. Background Technology

[0002] Turboshaft engines operating in dusty environments are typically equipped with dust protection devices to reduce damage from dust. Currently, the most commonly used dust protection device is an inertial particle separator.

[0003] The particle separator is located at the front of the engine, where the inlet airflow directly impacts the central body. Simultaneously, the inlet airflow branches at the lip, making the lip a primary point of airflow impact. All of these locations require anti-icing. Existing engine central bodies and separator lips typically employ hot air or hot lubricating oil for anti-icing. By designing a central body interlayer and separator lip interlayer / cavity, hot air or hot lubricating oil can be introduced into the interlayer or cavity to exchange heat with the surface, thus achieving anti-icing. Since many of its components contain thin-walled cavities, traditional manufacturing processes include casting, sheet metal welding, or composite-metal adhesive riveting. However, casting suffers from low yield rates and poor surface finishes. Sheet metal welding presents problems such as poor forming accuracy of irregularly shaped thin plates and easy deformation after welding. Composite-metal adhesive riveting places demands on the composite material's performance, requiring high-temperature resistance and corrosion resistance, while the adhesive riveting structure exhibits poor strength, sealing, and reliability. Summary of the Invention

[0004] This invention provides an anti-icing structure for a particle separator and an aero-engine to solve the technical problems of poor strength, sealing performance, and reliability in the prior art due to the thin-walled sandwich / cavity structure of the central body and separation lip of the particle separator, which leads to its poor manufacturing performance using traditional processes.

[0005] According to one aspect of the present invention, an anti-icing structure for a particle separator is provided. The particle separator includes a central body, a housing, and a separation lip, all coaxially mounted with an intake casing. An air intake passage is formed between the central body and the housing. The separation lip is located at the tail end of the particle separator and disposed within the intake casing. The separation lip includes a first outer wall and a first inner wall. A main channel front end is formed between the first inner wall and the outer wall surface of the central body, respectively connecting the air intake passage and the intake casing. A front end of a main channel is formed between the first outer wall and the inner wall of the housing. The air intake is cleared through a scavenging channel, and the separation lip is used to separate the airflow in the intake channel and guide it to the clearing channel and the main flow channel respectively. The central body includes a second inner wall and a second outer wall. The anti-icing structure includes an air ducting structure disposed in the intake casing for guiding anti-icing gas to the separation lip. The air ducting structure is also used to introduce anti-icing gas into the interlayer channel between the second inner wall and the second outer wall. The second inner wall is an annular plate structure with a corrugated or zigzag cross-section, and the outer ring peak of the second inner wall is located at the second outer wall.

[0006] As a further improvement to the above technical solution, the air intake structure includes a first air intake chamber formed on the outer ring of the air intake casing. An air intake port is provided at the end of the first air intake chamber away from the particle separator, and the end of the first air intake chamber near the particle separator is connected to the inner cavity of the separation lip.

[0007] As a further improvement to the above technical solution, an air-guiding layer is provided in the inner cavity of the separation lip near the first inner wall. The first end of the air-guiding layer is connected to the inner wall of the separation lip away from the particle separator, and the second end of the air-guiding layer is connected to the end of the first outer wall near the particle separator. An air-guiding channel communicating with the first air-guiding cavity is formed between the air-guiding layer and the inner wall of the separation lip. A first connecting structure is provided near the second end of the air-guiding layer. The air-guiding channel is used to guide the anti-icing gas in the first air-guiding cavity to flow through the air-guiding channel to the junction of the first inner wall and the outer wall, and then out through the connecting structure to the inner cavity of the separation lip. A second connecting structure is provided in the first outer wall to communicate with the cleaning channel.

[0008] As a further improvement to the above technical solution, the radial dimension of the air intake channel gradually decreases from the first end of the air intake layer towards the second end.

[0009] As a further improvement to the above technical solution, the air-entraining layer is an annular plate structure with a corrugated or zigzag cross-section, and the inner annular trough of the air-entraining layer is located on the first inner wall.

[0010] As a further improvement to the above technical solution, the intake casing has a hollow support plate, and the air duct structure further includes a second air duct chamber formed in the inner ring of the intake casing. The first air duct chamber and the second air duct chamber are connected through the hollow support plate. The second air duct chamber is connected to the interlayer channel of the central body through a third connecting structure provided in the central body. A fourth connecting structure is provided at the end of the second outer wall near the windward side of the central body.

[0011] As a further improvement to the above technical solution, a third air intake chamber is formed at the end of the interlayer channel located on the leeward side of the central body, and a fourth air intake chamber is formed at the end located on the windward side of the central body.

[0012] As a further improvement to the above technical solution, the second inner wall is set separately on the windward and leeward sides of the central body, and the corrugated structure density of the second inner wall on the windward side is greater than that of the second inner wall on the leeward side.

[0013] As a further improvement to the above technical solution, a transition air intake cavity is formed at the junction of the windward side and the leeward side of the interlayer channel.

[0014] According to another aspect of the invention, an aircraft engine is also provided, which includes the above-described particle separator anti-icing structure.

[0015] The present invention has the following beneficial effects:

[0016] The particle separator is installed at the inlet end of the intake casing. The inlet airflow passes through the front end of the main flow channel to the separation lip. The arc-shaped structure of the central body and the outer shell causes particles to separate under inertia and be discharged through the cleaning flow channel. The airflow with discharged impurity particles enters the engine through the main flow channel. By setting both the central body and the separation lip as a double-layer structure with an inner cavity, and by setting an anti-icing structure, anti-icing gas is simultaneously introduced into the inner cavity of the separation lip and the central body using the bleed air structure, thereby achieving the purpose of anti-icing by simultaneously exchanging heat on the separation lip and the central body. By constructing the second inner wall as a plate-like structure with a corrugated or zigzag cross-section, and its outer ring peak is located on the second outer wall, the sandwich channel formed by the corrugated structure of the central body reduces the cross-sectional area of ​​the channel by half for the same sandwich radial dimension, thereby significantly increasing the flow velocity and significantly improving the heat exchange efficiency. At the same time, since the outer ring peak of the second inner wall is located on the second outer wall, that is, the second inner wall and the second outer wall are both... The tightly integrated design significantly enhances the central body's resistance to impacts. Due to the numerous fusion points between the inner and outer walls, the overall pressure-bearing capacity is strengthened, while the larger channels reduce air resistance. The corrugated structure allows the second outer wall to serve as a support point for the second inner wall, enabling additive top-mounting on a single printed section, meeting the 45-degree rule and allowing for the 3D printing of this highly curved structure. Furthermore, the integrated printing of the central body in this embodiment effectively prevents gas leakage. Its machined surfaces are limited to the front and rear mounting edges and the outer wall surface, further improving strength and allowing for further thinning of the inner wall thickness. Its integrated structure avoids riveting between multiple thin-walled structural components, eliminating the need for traditional composite material development and performance testing. Compared to traditional methods such as casting, sheet metal welding, or composite-metal adhesive riveting, it offers higher pass rates and precision, reliable sealing, avoids welding deformation, and effectively reduces costs and improves anti-icing performance.

[0017] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0019] Figure 1 This is a partial cross-sectional view of the overall structure of a preferred embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the intake casing according to a preferred embodiment of the present invention;

[0021] Figure 3 This is a partial cross-sectional view of the intake casing according to a preferred embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of the central body in a preferred embodiment of the present invention.

[0023] Figure 5 This is a partial cross-sectional view of the central body of a preferred embodiment of the present invention;

[0024] Figure 6 yes Figure 5 A partial enlarged view of the windward end of the central body;

[0025] Figure 7 This is a schematic diagram of the clamping channel on the windward side of the central body in a preferred embodiment of the present invention;

[0026] Figure 8 This is a schematic diagram of the clamping channel on the leeward side of the central body in a preferred embodiment of the present invention;

[0027] Figure 9 This is a schematic diagram of the structure of the separated lip opening according to a preferred embodiment of the present invention;

[0028] Figure 10 This is a partial cross-sectional view of the separated lip opening according to a preferred embodiment of the present invention;

[0029] Figure 11 This is a cross-sectional view of the air intake channel of the separated lips in a preferred embodiment of the present invention.

[0030] Legend:

[0031] 1. Central body; 11. Second outer wall; 110. Third connecting structure; 111. Fourth connecting structure; 12. Second inner wall; 13. Interlayer channel; 14. Third air intake chamber; 15. Transition air intake chamber; 16. Fourth air intake chamber; 2. Outer shell; 3. Separation lip; 31. First inner wall; 32. First outer wall; 33. Connecting wall; 34. Annular air intake chamber; 35. Air intake channel; 36. Impact chamber; 37. First connecting structure; 38. Second connecting structure; 39. Air intake layer; 4. Inlet casing; 41. Air intake port; 42. First air intake chamber; 43. First air outlet; 44. Support plate; 45. Second air intake chamber; 46. Second air outlet; 5. Front end of main flow channel; 6. Main flow channel; 7. Clearing flow channel. Detailed Implementation

[0032] The embodiments of the present invention will be 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.

[0033] Figure 1 This is a partial cross-sectional view of the overall structure of a preferred embodiment of the present invention; Figure 2 This is a schematic diagram of the intake casing according to a preferred embodiment of the present invention; Figure 3This is a partial cross-sectional view of the intake casing according to a preferred embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the central body in a preferred embodiment of the present invention. Figure 5 This is a partial cross-sectional view of the central body of a preferred embodiment of the present invention; Figure 6 yes Figure 5 A partial enlarged view of the windward end of the central body; Figure 7 This is a schematic diagram of the clamping channel on the windward side of the central body in a preferred embodiment of the present invention; Figure 8 This is a schematic diagram of the clamping channel on the leeward side of the central body in a preferred embodiment of the present invention; Figure 9 This is a schematic diagram of the structure of the separated lip opening according to a preferred embodiment of the present invention; Figure 10 This is a partial cross-sectional view of the separated lip opening according to a preferred embodiment of the present invention; Figure 11 This is a cross-sectional view of the air intake channel of the separated lips in a preferred embodiment of the present invention.

[0034] like Figures 1 to 11 As shown, the anti-icing structure of the particle separator in this embodiment includes a central body 1, a housing 2, and a separation lip 3, all coaxially mounted with the intake casing 4. An air intake passage is formed between the central body 1 and the housing 2. The separation lip 3 is located at the tail end of the particle separator and is disposed in the intake casing 4. The separation lip 3 includes a first outer wall 32 and a first inner wall 31. The central body 1 includes a second inner wall 12 and a second outer wall 11. A main channel 6, which connects the air intake passage and the intake casing 4, is formed between the first inner wall 31 and the outer wall surface of the central body 1. 5. A clearing channel 7 is formed between the first outer wall 32 and the inner wall of the outer casing 2. The separation lip 3 is used to separate the airflow in the intake channel and then lead it to the clearing channel 7 and the main channel 6 respectively. The anti-icing structure includes an air bleed structure provided in the intake casing 4 for leading the anti-icing gas to the separation lip 3. The air bleed structure is also used to introduce the anti-icing gas into the interlayer channel 13 between the second inner wall 12 and the second outer wall 11. The second inner wall 12 is an annular plate structure with a corrugated or zigzag cross-section. The outer ring crest of the second inner wall 12 is located at the second outer wall 11.

[0035] The working principle of this particle separator anti-icing structure is as follows: The particle separator is installed at the inlet end of the intake casing 4. The inlet airflow passes through the front end 5 of the main flow channel to the separation lip 3. The particles are separated by inertia through the arc-shaped structure of the central body 1 and the outer shell 2 and discharged through the cleaning flow channel 7. The airflow that discharges impurity particles enters the engine through the main flow channel 6. By setting both the central body 1 and the separation lip 3 as a double-layer structure with an inner cavity, and by setting an anti-icing structure, the anti-icing gas is simultaneously introduced into the inner cavity of the separation lip 3 and the central body 1 through the air intake structure, thereby achieving the purpose of anti-icing by simultaneously exchanging heat between the separation lip 3 and the central body 1. By constructing the second inner wall 12 as a plate structure with a corrugated or zigzag cross-section, and its outer ring peak is located at the second outer wall 11, the interlayer channel 13 formed by the corrugated structure of the central body 1 reduces the cross-sectional area of ​​the channel by half under the same interlayer radial dimension, thereby greatly increasing the flow velocity and significantly improving the heat exchange efficiency. At the same time, since the outer ring peak of the second inner wall 12 is located at the second outer wall, 11, that is, the second inner wall 12 and the second outer wall 11 are tightly integrated, which greatly enhances the resistance of the central body 1 to impact. Due to the multiple fusion points of the inner and outer walls, the overall pressure bearing capacity is enhanced, and the larger channel can reduce the air duct resistance. Based on the corrugated structure, the second outer wall 11 becomes the support point of the second inner wall 12. It can be additively topped on a single printed section to meet the requirements of the 45-degree rule. It allows the large bending structure to be formed by 3D printing. In this embodiment, the central body 1 is based on one-piece printing, which can effectively avoid gas leakage. Its machined surface is only the front and rear mounting edge assembly surface and the outer wall surface, and the strength is further improved. The inner wall thickness can be further reduced. Its one-piece structure avoids the riveting between multiple thin-walled structural parts, and avoids the basic material research and development and various performance tests of traditional composite parts. Compared with the traditional casting, sheet metal welding or composite-metal part adhesive riveting processes, the pass rate and precision are higher, the sealing is reliable, and problems such as welding deformation are avoided, which effectively reduces costs and improves the anti-icing effect.

[0036] In some embodiments, the air intake structure includes a first air intake chamber 42 formed on the outer ring of the air intake casing 4. An air intake port 41 is provided at the end of the first air intake chamber 42 away from the particle separator. The end of the first air intake chamber 42 near the particle separator is connected to the inner cavity of the separation lip 3 through a first air outlet 43. Anti-icing gas enters the first air intake chamber 42 through the air intake port 41. After the gas is more evenly distributed and filled in the first air intake chamber 42, it is introduced into the separation lip 3 through the first air outlet 43, thereby ensuring the overall anti-icing effect.

[0037] It should be understood that one end of the first inner wall 31 and the first outer wall 32 of the separation lip 3 are connected, and the other end is connected by a connecting wall 33, which is used to connect with the intake casing 4.

[0038] Furthermore, an air-guiding layer 39 is provided near the first inner wall 31 within the inner cavity of the separation lip 3. The first end of the air-guiding layer 39 is connected to the inner wall of the separation lip 3 at the end furthest from the particle separator, and the second end of the air-guiding layer 39 is connected to the end of the first outer wall 32 near the particle separator. An air-guiding channel 35, communicating with the first air-guiding chamber 42, is formed between the air-guiding layer 39 and the inner wall of the separation lip 3. A first connecting structure 37 is provided near the second end of the air-guiding layer 39. The air-guiding channel 35 is used to guide the anti-icing gas in the first air-guiding chamber 42 to flow through the air-guiding channel 35 to the point where it impacts the first inner wall 31 and the outer wall, and then exits through the first connecting structure 37. The inner cavity of the separation lip 3 is provided; the first outer wall 32 is provided with a second connecting structure 38 that connects to the clearing channel 7. Specifically, by setting an air-guiding layer 39 to cooperate with the first inner wall layer to form an air-guiding channel 35, the anti-icing gas is accelerated to flow through the air-guiding channel 35 and impacts the junction of the first inner wall layer and the first outer wall layer at the top, forming an impact cavity 36 at this position, so that the first inner wall layer and the junction at the top can be fully heat-exchanged, greatly improving the anti-icing effect of key parts; after the anti-icing gas impacts the junction at the top, it flows out of the air-guiding channel 35 through the first connecting structure 37 into the inner cavity of the separation lip 3, and then is led out through the second connecting structure 38 to the clearing channel 7 for discharge;

[0039] In some embodiments, the radial dimension of the air intake channel 35 gradually decreases from the first end of the air intake layer 39 towards the second end, thereby gradually increasing the flow velocity of the anti-icing gas in the air intake channel 35 and improving the heat exchange effect. The air intake channel 35 is provided with an annular air intake cavity 34 with a larger radial dimension at the inlet end, so that the introduced anti-icing gas is fully and evenly distributed into the air intake channel 35, ensuring the heat exchange and anti-icing effect.

[0040] In some embodiments, the air-entraining layer 39 is an annular plate structure with a corrugated or zigzag cross-section. The inner trough of the air-entraining layer 39 is located on the first inner wall 31. By constructing the air-entraining layer 39 as a plate structure with a corrugated or zigzag cross-section and its inner trough located on the first inner wall 31, the air-entraining channel 35 formed based on the corrugated structure of the separation lip 3 has a smaller channel flow area for the same radial dimension, significantly increasing the anti-icing gas flow rate and significantly improving the heat exchange efficiency. At the same time, since the inner trough of the air-entraining layer 39 is located on the first inner wall 31, that is, the air-entraining layer 39 and the first inner wall 31 are tightly connected, the overall pressure-bearing capacity is enhanced due to the multiple fusion points between the inner and outer walls. The corrugated structure makes the first inner wall 31 a support for the air-entraining layer 39. The design allows for additive top-mounting on a single printed cross-section, meeting the 45-degree rule requirement. This enables the large-curvature structure to be formed through 3D printing. The one-piece printing effectively prevents gas leakage and further improves strength, while allowing for further thinning of the inner wall thickness. Its integrated structure avoids riveting between multiple thin-walled structural components, eliminating the need for basic material research and development and various performance tests required for traditional composite components. Compared to traditional processes such as casting, sheet metal welding, or composite-metal adhesive riveting, it offers higher pass rates and precision, reliable sealing, avoids welding deformation, and effectively reduces costs and improves anti-icing performance. The air-entraining layer 39 and the second inner wall 12 are preferably designed with a corrugated cross-section, resulting in smoother lines and stronger pressure resistance.

[0041] In some embodiments, the intake casing 4 has a hollow support plate 44, and the air duct structure further includes a second air duct chamber 45 formed in the inner ring of the intake casing 4. The first air duct chamber 42 and the second air duct chamber 45 are connected via the hollow support plate 44. The second air duct chamber 45 is connected to the interlayer channel 13 of the central body 1 through a second air outlet 46 provided in the intake casing 4 and a third connecting structure 110 provided in the central body 1. A fourth connecting structure 111 is provided at the end of the second outer wall 11 near the windward side of the central body 1. It should be understood that the support plate 44 is used for The inner and outer walls of the intake casing 4 are supported. The support plate 44 is set as a hollow structure and connects the first air intake chamber 42 and the second air intake chamber 45 at the same time. This allows the introduced anti-icing gas to be supplied to the inner cavity of the separation lip 3 and the inner cavity of the central body 1. At the same time, the first air intake chamber 42 and the second air intake chamber 45 are filled with gas and evenly distributed. When supplied to the corresponding inner cavity, the distribution is more uniform, ensuring the anti-icing effect. After the anti-icing gas flows through the interlayer channel 13, it fully exchanges heat with the wall surface of the central body 1 and is discharged through the fourth connecting structure 111 at the windward end of the second outer wall 11.

[0042] It should be understood that the first air outlet 43, the second air outlet 46, the first connecting structure 37, the second connecting structure 38, the third connecting structure 110 and the fourth connecting structure 111 in this embodiment are hole-like structures or grooves, and are evenly distributed along the circumference respectively.

[0043] Furthermore, a third air intake chamber 14 is formed at the leeward end of the interlayer channel 13 and a fourth air intake chamber 16 is formed at the windward end of the central body 1. The third air intake chamber 14 and the fourth air intake chamber 16 are annular cavities, so that the anti-icing gas entering the interlayer channel 13 is fully mixed in the annular cavity before entering each interlayer channel 13, making the airflow more uniform and ensuring the anti-icing effect.

[0044] In some embodiments, the second inner wall 12 is configured separately on the windward and leeward sides of the central body 1. The density of the corrugated structure of the second inner wall 12 on the windward side is greater than that on the leeward side, so that the leeward side has a larger air intake while the windward side has a higher air intake velocity, thereby improving the heat exchange capacity and the anti-icing effect.

[0045] Furthermore, a transition air intake chamber 15 is formed at the junction of the windward and leeward sides of the interlayer channel 13. Since the interlayer channels 13 on the windward and leeward sides are set separately, an annular transition air intake chamber 15 can also be set at the junction of the two. This allows the anti-icing gas flowing through the interlayer channel 13 on the leeward side to be mixed again in the transition air intake chamber 15 and evenly distributed to the interlayer channel 13 entering the windward side, ensuring the heat exchange and anti-icing effect.

[0046] On the other hand, a preferred embodiment of the present invention also provides an aero-engine that incorporates the aforementioned particle separator anti-icing structure.

[0047] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0048] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0049] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A particle separator anti-icing structure, the particle separator comprising a central body (1) coaxially mounted with an intake casing (4), an outer shell (2), and a separation lip (3), an air intake passage formed between the central body (1) and the outer shell (2), the separation lip (3) being located at the tail end of the particle separator and disposed in the intake casing (4), the separation lip (3) comprising a first outer wall (32) and a first inner wall (31), the first inner wall (31) forming a front end (5) of a main flow passage (6) connecting the air intake passage and the intake casing (4) respectively between the outer wall of the central body (1), a clearing flow passage (7) forming between the first outer wall (32) and the inner wall of the outer shell (2), the separation lip (3) being used to separate the airflow of the air intake passage and then guide it to the clearing flow passage (7) and the main flow passage (6) respectively, characterized in that, The central body (1) includes a second inner wall (12) and a second outer wall (11); the anti-icing structure includes an air duct structure disposed in the air intake casing (4) for guiding anti-icing gas to the separation lip (3), and the air duct structure is also used to introduce anti-icing gas into the interlayer channel (13) between the second inner wall (12) and the second outer wall (11); the second inner wall (12) is an annular plate structure with a corrugated or zigzag cross-section, and the outer ring peak of the second inner wall (12) abuts against the second outer wall (11); the air duct structure includes a first air duct cavity (42) formed in the outer ring of the air intake casing (4), and an air duct port (41) is provided at the end of the first air duct cavity (42) away from the particle separator, and the end of the first air duct cavity (42) near the particle separator is connected to the inner cavity of the separation lip (3); the inner cavity of the separation lip (3) is close to the first inner wall. (31) An air-guiding layer (39) is provided. The first end of the air-guiding layer (39) is connected to the inner wall of the separation lip (3) away from the particle separator. The second end of the air-guiding layer (39) is connected to the end of the first outer wall (32) near the particle separator. An air-guiding channel (35) is formed between the air-guiding layer (39) and the inner wall of the separation lip (3) and communicates with the first air-guiding cavity (42). A first communication structure (37) is provided near the second end of the air-guiding layer (39). The air-guiding channel (35) is used to guide the anti-icing gas in the first air-guiding cavity (42) to flow through the air-guiding channel (35) and impact the connection position of the first inner wall (31) and the first outer wall (32). Finally, it is led out to the inner cavity of the separation lip (3) through the first communication structure (37). A second communication structure (38) is provided on the first outer wall (32) to communicate with the cleaning channel (7).

2. The anti-icing structure for the particle separator according to claim 1, characterized in that, The radial dimension of the air intake channel (35) gradually decreases from the first end of the air intake layer (39) toward the second end.

3. The anti-icing structure for the particle separator according to claim 1, characterized in that, The air-guiding layer (39) is an annular plate structure with a corrugated or zigzag cross-section, and the inner annular trough of the air-guiding layer (39) is located on the first inner wall (31).

4. The anti-icing structure for the particle separator according to claim 1, characterized in that, The intake casing (4) has a hollow support plate (44), and the air intake structure further includes a second air intake chamber (45) formed in the inner ring of the intake casing (4). The first air intake chamber (42) and the second air intake chamber (45) are connected through the hollow support plate (44). The second air intake chamber (45) is connected to the interlayer channel (13) of the central body (1) through a third connecting structure (110) provided in the central body (1). The second outer wall (11) is provided with a fourth connecting structure (111) at the end near the windward side of the central body (1).

5. The anti-icing structure for the particle separator according to claim 1, characterized in that, The interlayer channel (13) has a third air intake chamber (14) at the leeward end of the central body (1) and a fourth air intake chamber (16) at the windward end of the central body (1).

6. The anti-icing structure for a particle separator according to any one of claims 1-5, characterized in that, The second inner wall (12) is set separately on the windward and leeward sides of the central body (1), and the corrugated structure density of the second inner wall (12) on the windward side is greater than that of the second inner wall (12) on the leeward side.

7. The anti-icing structure for the particle separator according to claim 6, characterized in that, The interlayer channel (13) forms a transition air intake cavity (15) at the junction of the windward side and the leeward side.

8. An aircraft engine, characterized in that, The application has the anti-icing structure of the particle separator as described in any one of claims 1-7.

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