An engine nozzle embedded connection sealing structure and method

Abstract

The present invention belongs to the field of engine connection structures, and specifically relates to an engine nozzle embedded connection sealing structure and method. The connection sealing structure includes a mounting hole I provided on the mounting end face of the base and a connection structure provided on the nozzle; the connection structure includes a stepped hole I and a connection assembly, wherein the small hole I of the stepped hole I extends through the nozzle mounting end face of the nozzle, and the large hole I of the stepped hole I extends through the side of the nozzle facing away from the base; the connection assembly includes a connection tube, a connection piece I, a connection piece II, a disc spring, an elastic gasket, and a potting medium. The engine nozzle embedded connection sealing structure comprehensively improves the convenience of disassembly and maintenance of the engine and the compartment, effectively reduces the size and height of the sealing flange and the space occupied, and improves the reliability and environmental adaptability of the engine connection seal.

Description

Technical Field

[0001] The present invention belongs to the field of engine connection structures, and in particular relates to an engine nozzle embedded connection sealing structure and method. Background Art

[0002] The connection between the engine nozzle and the base body often adopts the flange end face sealing form. The engine works under high temperature (2500K and above) airflow, and the internal and external pressure difference of the sealing flange changes alternately between positive and negative with the changes in the engine working airflow pressure and the external ambient air pressure. The assembly of the traditional engine nozzle and the base body is generally first assembled by flange and then assembled with the cabin section, which makes the assembly process more complicated. In order to solve the problems of the connection sealing structure in the above-mentioned high temperature, alternating pressure difference working environment and complex assembly process, the present invention proposes an embedded connection sealing structure and method for the engine nozzle. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an engine nozzle embedded connection sealing structure and method which has a compact structure, is easy to install, has a good sealing effect and is highly adaptable to thermal deformation.

[0004] The present invention provides an engine nozzle embedded connection sealing structure, comprising a mounting hole I provided on a mounting end surface of a base body and a connection structure provided on the nozzle;

[0005] The connection structure includes a stepped hole I and a connection assembly, wherein the small hole I of the stepped hole I penetrates to the nozzle mounting end face of the nozzle, and the large hole I of the stepped hole I penetrates to the side of the nozzle away from the base body;

[0006] The connecting assembly includes a connecting tube, a connecting piece I, a connecting piece II, a disc spring and a potting medium;

[0007] The connecting member I includes a limiting portion I and a connecting portion I arranged in sequence. One end of the limiting portion I abuts against step I of the stepped hole I, and a disc spring is provided between the limiting portion I and the step I. The other end of the limiting portion I extends into the large hole I. A mounting hole II is provided on the side of the limiting portion I facing away from the base. The connecting portion I passes through the small hole I and is fastened to the mounting hole I.

[0008] The outer wall of the connecting tube is fitted with the large hole I, and a stepped hole II is provided inside the connecting tube. The small hole II of the stepped hole II is provided on the side of the connecting tube close to the base body and penetrates into the large hole I. The large hole II of the stepped hole II penetrates into the large hole, or penetrates to the side of the nozzle away from the base body.

[0009] The connecting member II includes a limiting portion II and a connecting portion II which are arranged in sequence. One end of the limiting portion II abuts against the step II of the stepped hole II, and the other end of the limiting portion II extends into the large hole II. The connecting portion II passes through the small hole II and is fastened to the mounting hole II.

[0010] The potting medium is potted in the macropore II.

[0011] Furthermore, the connection portion I is threadedly fastened to the mounting hole I;

[0012] The connection part II is threadedly fastened to the mounting hole II.

[0013] Furthermore, a radial sealing ring is provided between the outer wall of the connecting tube and the inner wall of the large hole I.

[0014] Furthermore, an axial sealing ring is provided between the limiting portion I and the end of the connecting tube;

[0015] An elastic washer is provided between the limiting portion II and the step II;

[0016] The sealing medium is also sealed in the end surface of the connecting tube facing away from the base body and in the large hole I.

[0017] Furthermore, a boss I is provided on the outside of the mounting hole I on the mounting end face of the base, and a boss II is provided on the nozzle mounting end face at a position corresponding to the boss I. A sealing flat gasket is sleeved on the outside of the boss I, and one end of the sealing flat gasket abuts against the mounting end face of the base, and the other end abuts against the end face of the boss II.

[0018] Furthermore, there is a gap between the outer wall of the sealing flat gasket and the side wall of the boss II.

[0019] Furthermore, a plurality of through holes are arranged in an annular array on the sealing flat gasket body, and the compression amount of the sealing flat gasket is 10-30%.

[0020] Furthermore, a cooling channel is provided on the wall surface of the mounting end surface of the base body and is located outside the mounting hole I.

[0021] Furthermore, the potting medium is high temperature resistant putty.

[0022] The present invention also provides an engine nozzle embedded connection sealing method, using the above-mentioned engine nozzle embedded connection sealing structure:

[0023] When the connection component and / or the base body and the nozzle are deformed due to heat, the disc spring compensates for the deformation and ensures the sealing effect of the connection structure.

[0024] The present invention has the following advantages: 1. The connection seal structure can accommodate thermal deformation of the connection seal structure itself, as well as thermal deformation of the base and nozzle (even when the base and nozzle have different degrees of thermal deformation). Specifically, the disc spring can compensate for thermal deformation between the connecting barrel, connector I, and connector II, ensuring a tight connection. The disc spring also allows for minimal differential thermal deformation between the base and nozzle, ensuring a good and stable sealing connection even when these conditions vary.

[0025] 2. The connection sealing structure is compact and completely embedded in the base mounting end face and the nozzle mounting end face. The connection structure cannot be seen or touched on the inner and outer walls of the base and the nozzle, which can significantly reduce the external space occupied, facilitate the lightweight and miniaturization of the overall engine design, and meet the requirements of modern engines for compact layout.

[0026] 3. When the end face of the large hole I on the nozzle is located on the inner side of the nozzle, the connecting tube and the potting medium can completely fill the end of the large hole I away from II, making the inner side of the nozzle smooth and ensuring the use effect of the nozzle.

[0027] 4. For easy installation and assembly, the large hole I of the stepped hole I extends through the nozzle on the side facing away from the base, forming an opening through which assemblers can easily install connecting components (such as the connecting cylinder, connector I, and connector II). This simplifies the assembly process, reduces manual operation difficulty, and improves production efficiency, making it particularly suitable for batch manufacturing and maintenance scenarios.

[0028] 5. The design of the connecting tube and connector II reliably seals large hole I within stepped bore I. After connector I is installed, connector II's stopper II is held in place by step II within the connecting tube. Its connector II then passes through small hole II and securely engages with mounting hole II at the rear of connector I, directly securing the connecting tube to connector II and completely sealing the rear opening of large hole I. This structure not only blocks the intrusion of high-temperature airflow from the nozzle's exterior into large hole I, preventing overheating and structural deformation and failure of the connection, but also eliminates potential leakage paths for external air through the gap between large hole I, small hole I, and the base / nozzle mounting faces, fundamentally preventing external air from penetrating the base or nozzle system and impacting engine sealing performance. Furthermore, the sealing medium embedded in large hole II at the rear of stepped bore II further strengthens the overall seal, creating a dual-protection mechanism. This design not only significantly improves system sealing reliability but also simplifies the assembly process (connection first, then sealing) while achieving compact utilization of critical space.

[0029] This engine nozzle-embedded connection and sealing structure comprehensively improves engine connection safety, environmental adaptability, and ease of maintenance. It is particularly suitable for high-temperature, high-pressure engine operating environments. It addresses the significant thermal deformation and excessive space requirements of traditional connection and sealing structures. Traditional connection and sealing structures utilize a pair of flanges connected by screws. Due to the constraints of screw size and layout, the flanges are too tall and occupy a large space within the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Attachment Figure 1 Schematic diagram of the connection structure between the base and the nozzle in the present invention;

[0031] Attachment Figure 2This is a structural schematic diagram of an engine nozzle embedded connection sealing structure according to one embodiment of the present invention;

[0032] Attachment Figure 3 For attachment Figure 2 Middle AA section view;

[0033] Attachment Figure 4 This is a structural schematic diagram of an engine nozzle embedded connection sealing structure according to another embodiment of the present invention.

[0034] In the figure, 1-base; 101-base mounting end face; 102-mounting hole I; 103-boss I; 2-cooling channel; 3-sealing flat gasket; 4-disc spring; 5-connecting part I; 501-limiting part I; 5011-mounting hole II; 502-connecting part I; 6-connecting part II; 601-limiting part II; 602-connecting part II; 7-connecting cylinder; 701-stepped hole II; 7011-small hole II; 7012-large hole II; 7013-step II; 8-nozzle; 801-nozzle mounting end face; 802-boss II; 9-potting medium; 10-stepped hole I; 1001-small hole I; 1002-large hole I; 1003-step I; 11-radial sealing ring; 12-axial sealing ring; 13-elastic gasket. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0036] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0037] In addition, the terms "first," "second," and so on, used in this disclosure are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referenced. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this disclosure, "plurality" means at least two, such as two or three, unless otherwise specifically defined.

[0038] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; it can mean mechanical connection, electrical connection, physical connection, or wireless communication connection; it can mean direct connection or indirect connection through an intermediate medium; it can mean internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0040] As attached Figure 1 -Attached Figure 4 As shown, the present invention provides an engine nozzle embedded connection sealing structure, refer to the attached Figure 1 , the connection sealing structure is used to connect the base 1 and the nozzle 8, wherein the base 1 can be the combustion chamber of the engine or the front section of the nozzle. When it is the front section of the nozzle, the material of the base 1 and the material of the nozzle 8 may be inconsistent, that is, the two may have different thermal expansion coefficients. The connection sealing structure of the present invention can adapt to the different thermal expansion degrees of the two and can also maintain the connection stability and sealing. The connection sealing structure is located on the mounting end surface of the base mounting end surface 101 and the nozzle mounting end surface 801, thereby realizing an embedded connection. The connection sealing structure cannot be seen or touched on the inner and outer walls of the base 1 and the nozzle 8, thereby making it easier to achieve the compactness requirements of the base 1 and the nozzle 8. Specifically, the embedded connection sealing structure of the engine nozzle includes a mounting hole Ⅰ102 provided on the base mounting end surface 101 and a connection structure provided on the nozzle 8;

[0041] The connection structure includes a stepped hole I10 and a connection assembly. The stepped hole I10 includes a small hole I1001, a step I1003, and a large hole I1002, which are arranged in sequence. It should be noted that the stepped hole I10 is not necessarily a circular axis or a circular hole. The cross-section can be a direction, a regular polygon, or other special-shaped structures, but a stepped circular hole is preferred. The small hole I1001 of the stepped hole I10 extends through the nozzle mounting end face 801 of the nozzle 8, and the large hole I1002 of the stepped hole I10 extends through the side of the nozzle 8 facing away from the base 1. The large hole I1002 extends through the side of the nozzle 8 facing away from the base 1 to form an opening for the assembler to install the connection assembly through when installing the embedded connection sealing structure of the engine nozzle.

[0042] The connecting assembly includes a connecting tube 7, a connecting piece I 5, a connecting piece II 6, a disc spring 4 and a potting medium 9;

[0043] Connecting part Ⅰ5 includes a limiting part Ⅰ501 and a connecting part Ⅰ502 which are arranged in sequence, that is, the limiting part Ⅰ501 and the connecting part Ⅰ502 are in a stepped shaft structure. It should be noted that the stepped shaft is not necessarily a circular shaft, and the cross-section may be a direction, a regular polygon or other special-shaped structures, but a stepped circular shaft is preferably used. One end of the limiting part Ⅰ501 abuts against the step Ⅰ1003 of the stepped hole Ⅰ10, so that the limiting part Ⅰ501 is restricted in the large hole Ⅰ1002, and a disc spring 4 is arranged between the limiting part Ⅰ501 and the step Ⅰ1003. The arrangement of the disc spring 4, after the embedded connection sealing structure of the engine nozzle is installed, when the engine generates heat during operation and the connection component undergoes thermal deformation, the disc spring 4 can allow thermal deformation compensation between the connecting tube 7, the connecting part Ⅰ5 and the connecting part Ⅱ6 to ensure the tightness of the connection. The arrangement of the disc spring 4 also allows for slightly different thermal deformations between the base 1 and the nozzle 8, ensuring a good and stable sealing connection even under these conditions. The other end of the stopper I 501 extends into the large hole I 1002, and a mounting hole II 5011 is provided on the side of the stopper I 501 facing away from the base 1. The connecting portion I 502 passes through the small hole I 1001 and is securely engaged with the mounting hole I 102. This engagement can be achieved by a snap connection, threaded connection, or riveted connection, with threaded connection being preferred.

[0044] The connecting member I5 is used to realize the connection between the base body 1 and the nozzle 8, and is arranged on the matching end surfaces of the base body 1 and the nozzle 8 to realize an embedded connection.

[0045] The outer wall of the connecting tube 7 is fitted with the large hole I1002, thereby achieving a sealed fit between the connecting tube 7 and the large hole I1002. A stepped hole II701 is provided inside the connecting tube 7. The stepped hole II701 includes a small hole II7011, a step II7013, and a large hole II7012, which are arranged in sequence. It should be noted that the stepped hole II701 is not necessarily a circular axis or a circular hole. The cross-section can be a direction, a regular polygon, or other special-shaped structures, but a stepped circular hole is preferably used. The small hole II7011 of the stepped hole II701 is provided on the side of the connecting tube 7 close to the base 1 and extends into the large hole I1002. The large hole II7012 of the stepped hole II701 extends into the large hole, or extends to the side of the nozzle 8 facing away from the base 1.

[0046] The connecting member II 6 includes a limiting portion II 601 and a connecting portion II 602 which are sequentially arranged, that is, the limiting portion II 601 and the connecting portion II 602 are in a stepped shaft structure. It should be noted that the stepped shaft is not necessarily a circular shaft, and the cross-section may be a regular polygon or other special-shaped structure. However, a stepped circular shaft is preferably used. One end of the limiting portion II 601 abuts against the step II 7013 of the stepped hole II 701, so that the limiting portion II 601 is restricted in the large hole I 1002, and the other end of the limiting portion II 601 extends into the large hole II 7012. The connecting portion II 602 passes through the small hole II 7011 and is fastened with the mounting hole II 5011. The fastening can be a snap connection, a threaded connection or a riveted connection, and a threaded connection is preferably used.

[0047] The setting of the connecting part Ⅱ6 is used to achieve the tight fit between the connecting tube 7 and the connecting part Ⅰ5, and at the same time is used to seal the large hole Ⅰ1002 at the rear end of the connecting part Ⅰ5, thereby preventing the high-temperature airflow at the outer end of the nozzle 8 from entering the large hole Ⅰ1002 and causing overheating and other problems. At the same time, it can also prevent air from entering the base 1 and the nozzle 8 through the large hole Ⅰ1002, the small hole Ⅰ1001, the base mounting end face 101 and the nozzle mounting end face 801, affecting the sealing effect of the connection between the engine base and the nozzle.

[0048] The potting medium 9 is potted in the large hole II 7012. The setting of the potting medium 9, on the one hand, blocks the large hole II 7012 to prevent air from entering the large hole I 1002 through the large hole II 7012 and the small hole II 7011. On the other hand, it can also ensure the tightness of the connecting part II 6 and prevent the connecting part II 6 from loosening.

[0049] The engine nozzle embedded connection sealing structure provided by the present invention has the following beneficial effects:

[0050] 1. The connection seal structure can accommodate thermal deformation of the connection seal structure itself, as well as thermal deformation of the base body 1 and nozzle 8 (even when the base body 1 and nozzle 8 have different degrees of thermal deformation). Specifically, the disc spring 4 allows for thermal deformation compensation between the connecting barrel 7, connector I 5, and connector II 6, ensuring a tight connection. The provision of the disc spring 4 also allows for minimal differential thermal deformation between the base body 1 and nozzle 8, ensuring a good and stable sealing connection even under varying thermal deformation conditions.

[0051] 2. The connection sealing structure is compact and completely embedded in the base mounting end face 101 and the nozzle mounting end face 801. The connection structure cannot be seen or touched on the inner and outer walls of the base 1 and the nozzle 8, which can significantly reduce the external space occupied, facilitate the lightweight and miniaturization of the overall engine design, and meet the requirements of modern engines for compact layout.

[0052] 3. When the end face of the large hole I1002 on the nozzle 8 is located on the inner side of the nozzle 8, the connecting tube 7 and the potting medium 9 can completely fill the end of the large hole I1002 away from II7011, making the inner side of the nozzle 8 smooth and ensuring the use effect of the nozzle 8.

[0053] 4. For ease of installation and assembly, the large hole I1002 of the stepped hole I10 extends through the nozzle 8 to the side facing away from the base 1, forming an opening through which assemblers can easily install connecting components (such as the connecting cylinder 7, connector I5, and connector II6). This simplifies the assembly process, reduces manual operation difficulty, and improves production efficiency, making it particularly suitable for batch manufacturing and maintenance scenarios.

[0054] 5. The design of the connecting tube 7 and the connecting part II6 can realize reliable sealing of the large hole I1002 of the stepped hole I10: after the connecting part I5 is installed, the limiting part II601 of the connecting part II6 is limited by the step II7013 in the connecting tube 7, and its connecting part II602 passes through the small hole II7011 of the connecting tube 7 and is tightly matched with the mounting hole II5011 at the tail of the connecting part I5, directly fastening the connecting tube 7 and the connecting part II602, and completely sealing the rear end opening of the large hole I1002. On the one hand, this structure blocks the high-temperature airflow outside the nozzle from invading the interior of the large hole I1002, avoiding deformation and failure of the connection structure caused by overheating; on the other hand, it cuts off the potential leakage path of external gas through the large hole I1002, the small hole I1001, and the base mounting end face 101 / the nozzle mounting end face gap 801, fundamentally preventing external gas from penetrating into the base 1 or the nozzle 8 system and affecting the engine sealing performance. Furthermore, the potting medium 9 within the large hole II 7012 at the rear end of the stepped hole II 701 further strengthens the overall seal, creating a dual-protection mechanism. This design not only significantly enhances the system's sealing reliability but also simplifies the assembly process (connection first, then sealing) while achieving compact utilization of critical space.

[0055] This engine nozzle-embedded connection and sealing structure comprehensively improves engine connection safety, environmental adaptability, and ease of maintenance. It is particularly suitable for high-temperature, high-pressure engine operating environments. It addresses the significant thermal deformation and excessive space requirements of traditional connection and sealing structures. Traditional connection and sealing structures utilize a pair of flanges connected by screws. Due to the constraints of screw size and layout, the flanges are too tall and occupy a large space within the engine.

[0056] In a preferred embodiment, the connection portion I 502 is threadedly fastened to the mounting hole I 102;

[0057] The connection part II 602 is threadedly fastened to the mounting hole II 5011. The threaded fastening connection is characterized by simple installation and stable and reliable connection. In addition, the setting of the potting medium 9 and the connecting tube 7 can prevent the two sets of threaded connections from loosening, thereby improving the connection stability.

[0058] In one embodiment, a radial sealing ring 11 is provided between the outer wall of the connecting tube 7 and the inner wall of the large hole I 1002. The provision of the radial sealing ring 11 can further improve the sealing effect between the outer wall of the connecting tube 7 and the inner wall of the large hole I 1002.

[0059] In one embodiment, an axial sealing ring 12 is provided between the limiting portion I501 and the end of the connecting tube 7, which can further improve the sealing effect between the outer wall of the connecting tube 7 and the connecting member I5.

[0060] An elastic washer 13 is provided between the limiting portion II 601 and the step II 7013 .

[0061] Reference Attachment Figure 4 , the potting medium 9 is also potted in the end face of the connecting tube 7 facing away from the base 1 and the large hole Ⅰ1002. In this embodiment, the potting medium 9 simultaneously blocks the end face of the connecting tube 7 facing away from the base 1 and the large hole Ⅱ7012, so that the connecting tube 7 and the large hole Ⅰ1002 are completely sealed and matched, which can greatly improve the sealing performance. In this embodiment, the axial sealing ring 12 can allow a certain amount of displacement between the limiting portion Ⅰ501 and the connecting tube 7. At this time, the setting of the axial sealing ring 12 and the elastic gasket 13 can ensure that the connecting part Ⅰ5 and the connecting part Ⅱ6 can still compensate for thermal deformation after the connecting tube 7 cannot be displaced. That is, the combination of the disc spring 4, the axial sealing ring 12 and the elastic gasket 13 can enable the connection sealing structure to still adapt to the thermal deformation of the connection sealing structure itself and the thermal deformation of the base 1 and the nozzle 8 (even when the degree of thermal deformation of the base and the nozzle is inconsistent).

[0062] In addition, in this embodiment, the mounting hole on the inner end face of the nozzle 8 is entirely filled with the potting medium 9. In this case, the inner end face of the nozzle 8 is made of only two materials: the nozzle 8 itself and the potting medium 9, instead of the Figure 2 The three materials shown for the nozzle 8 itself, the potting medium 9 and the connecting tube 7 can ensure stable performance of the inner side of the nozzle 8 and enhanced resistance to thermal deformation.

[0063] In one embodiment, the base mounting end surface 101 is provided with a boss I 103 outside the mounting hole I 102, and the nozzle mounting end surface 801 is provided with a boss II 802 at a position corresponding to the boss I 103. A sealing flat gasket 3 is sleeved outside the boss I 103, with one end of the sealing flat gasket 3 abutting the base mounting end surface 101 and the other end abutting the end surface of the boss II 802. The provision of the sealing flat gasket 3 can greatly improve the sealing effect between the base mounting end surface 101 and the nozzle mounting end surface 801, preventing external air from entering the base 1 and the nozzle 8 through the gap between the base mounting end surface 101 and the nozzle mounting end surface 801, and also preventing high-temperature airflow within the base 1 and the nozzle 8 from leaking to the outside through the base mounting end surface 101 and the nozzle mounting end surface 801.

[0064] In one embodiment, a radial gap is provided between the outer wall of the sealing gasket 3 and the side wall of the boss II 802. The gap can be used to compensate for thermal deformation of the sealing gasket 3 and the nozzle, thereby preventing deformation and failure of the connection structure caused by overheating.

[0065] In one embodiment, the sealing gasket 3 has a plurality of through-holes arranged in an annular array on its ring body, and the compression of the sealing gasket 3 is 10% to 30%. This ensures deformation and effectively blocks the high-temperature airflow inside the engine from being transmitted outward. It also blocks air outside the engine from entering the engine, thus achieving an integrated seal between the inside and the outside.

[0066] In one embodiment, a cooling channel 2 is provided within the wall of the base mounting end surface 101, surrounding the outer side of the mounting hole I 102. This channel 2 cools the connection portion I 502, improving the stability and reliability of the sealing gasket in high-temperature airflow. By cooling the sealing structure, the operating temperature of the connection sealing flange is reduced, and common metal materials can be used instead of high-temperature brittle materials such as molybdenum-lanthanum alloys. This facilitates the reuse of the high-temperature connection sealing structure of the engine nozzle and ensures sealing reliability.

[0067] In one embodiment, the encapsulating medium 9 is a high temperature resistant putty, which is formed by encapsulating, drying, and curing.

[0068] The present invention also provides an engine nozzle embedded connection sealing method, using the above-mentioned engine nozzle embedded connection sealing structure:

[0069] When the connecting assembly and / or base 1 or nozzle 8 deform due to heat, the disc spring 4 compensates for the deformation, ensuring the sealing effect of the connection structure. This embedded connection and sealing method for engine nozzles comprehensively improves engine connection safety, environmental adaptability, and maintenance ease. It is particularly suitable for high-temperature and high-pressure engine operating environments.

[0070] In an embodiment in which the sealing medium 9 is also sealed in the end face of the connecting tube 7 facing away from the base 1 and in the large hole Ⅰ1002, the combination of the disc spring 4, the axial sealing ring 12 and the elastic gasket 13 can enable the connecting sealing structure to still adapt to the thermal deformation of the connecting sealing structure itself as well as the thermal deformation of the base 1 and the nozzle 8.

[0071] The above description is merely an embodiment and does not limit the present invention in any way. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make many possible changes, modifications, or modifications to the technical solution of the present invention into equivalent embodiments with equivalent changes using the technical content disclosed above. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the scope of protection of the technical solution of the present invention.

Claims

1. An engine nozzle embedded connection sealing structure, characterized in that: It includes a mounting hole I provided on the mounting end surface of the base body and a connecting structure provided on the nozzle; The connection structure includes a stepped hole I and a connection assembly, wherein the small hole I of the stepped hole I penetrates to the nozzle mounting end face of the nozzle, and the large hole I of the stepped hole I penetrates to the side of the nozzle away from the base body; The connecting assembly includes a connecting tube, a connecting piece I, a connecting piece II, a disc spring and a potting medium; The connecting member I includes a limiting portion I and a connecting portion I arranged in sequence. One end of the limiting portion I abuts against step I of the stepped hole I, and a disc spring is provided between the limiting portion I and the step I. The other end of the limiting portion I extends into the large hole I. A mounting hole II is provided on the side of the limiting portion I facing away from the base. The connecting portion I passes through the small hole I and is fastened to the mounting hole I. The outer wall of the connecting tube is fitted with the large hole I, and a stepped hole II is provided inside the connecting tube. The small hole II of the stepped hole II is provided on the side of the connecting tube close to the base body and penetrates into the large hole I. The large hole II of the stepped hole II penetrates into the large hole, or penetrates to the side of the nozzle away from the base body. The connecting member II includes a limiting portion II and a connecting portion II which are arranged in sequence. One end of the limiting portion II abuts against the step II of the stepped hole II, and the other end of the limiting portion II extends into the large hole II. The connecting portion II passes through the small hole II and is fastened to the mounting hole II. The potting medium is potted in the macropore II.

2. The engine nozzle embedded connection sealing structure according to claim 1, characterized in that: The connection portion I is threadedly fastened to the mounting hole I; The connection part II is threadedly fastened to the mounting hole II.

3. The engine nozzle embedded connection sealing structure according to claim 1, characterized in that: A radial sealing ring is provided between the outer wall of the connecting cylinder and the inner wall of the large hole I.

4. The engine nozzle embedded connection sealing structure according to any one of claims 1 to 3, characterized in that: An axial sealing ring is provided between the limiting portion I and the end of the connecting tube; An elastic washer is provided between the limiting portion II and the step II; The sealing medium is also sealed in the end surface of the connecting tube facing away from the base body and in the large hole I.

5. The engine nozzle embedded connection sealing structure according to any one of claims 1 to 3, characterized in that: The base mounting end face is located on the outside of the mounting hole I and is provided with a boss I, the nozzle mounting end face is located at the corresponding position of the boss I and is provided with a sealing flat gasket on the outside of the boss I, one end of the sealing flat gasket abuts the base mounting end face, and the other end abuts the nozzle mounting end face.

6. The engine nozzle embedded connection sealing structure according to claim 5, characterized in that: There is a gap between the outer wall of the sealing flat gasket and the nozzle boss II.

7. The engine nozzle embedded connection sealing structure according to claim 5, characterized in that: A plurality of through holes are arranged in a ring array on the sealing flat gasket body, and the compression amount of the sealing flat gasket is 10-30%.

8. The engine nozzle embedded connection sealing structure according to any one of claims 1 to 3, characterized in that: A cooling channel is arranged on the wall surface of the mounting end surface of the base body and around the outside of the mounting hole I.

9. The engine nozzle embedded connection sealing structure according to any one of claims 1 to 3, characterized in that: The potting medium is high temperature resistant putty.

10. A method for sealing an embedded connection of an engine nozzle, characterized in that: Using the engine nozzle embedded connection sealing structure according to any one of claims 1 to 9: When the connection assembly is deformed by heat and / or the base body and the nozzle are deformed by heat, the disc spring compensates for the deformation and ensures the sealing effect of the connection structure.

Images