Scramjet engine sealing structure

Abstract

The invention relates to the technical field of scramjet engines, in particular to a scramjet engine sealing structure. The scramjet engine sealing structure comprises a first flange and a second flange. The first flange is provided with a first surface, the first surface is provided with a first containing groove, the second flange is provided with a second surface, and the second surface is provided with a second containing groove. When the first flange and the second flange are in an assembled state, the first surface is attached to the second surface, the first containing groove and the second containing groove define a sealing groove, the sealing groove is provided with a first sealing ring, one end of the first sealing ring is located in the first containing groove, and the other end of the first sealing ring is located in the second containing groove. According to the sealing structure of the scramjet engine, a gap formed between the first surface of the first flange and the second surface of the second flange can be broken, and therefore high-temperature and high-pressure air or fuel gas can be prevented from leaking through the gap between the first flange and the second flange.

Description

Technical Field

[0001] The present invention relates to the technical field of scramjet engines, and in particular to a scramjet engine sealing structure. Background Art

[0002] As one of the main power forms of hypersonic aircraft, scramjet engines are mainly composed of three parts: air inlet, combustion chamber and tail nozzle. Among them, the air inlet sucks in a large amount of air and compresses it into high-pressure gas; the compressed high-pressure air enters the combustion chamber, mixes with the fuel and burns to form high-temperature and high-pressure combustion gas; the high-temperature and high-pressure combustion gas is accelerated and expanded and discharged through the tail nozzle, forming the thrust of the scramjet engine, providing power for the hypersonic aircraft.

[0003] Usually, flange bolts are used to connect the air inlet and the combustion chamber, the combustion chamber and the tail nozzle, and the combustion chamber itself. However, in the prior art, the flange end face does not have a sealing function. When the scramjet engine is ignited, the high-temperature and high-pressure gas in the inner flow channel will leak on the flange surface, which will not only cause safety problems for the aircraft itself and ground test facilities, but also lead to a loss of performance of the scramjet engine. Summary of the invention

[0004] In order to solve the problem of gas leakage through flanges in the prior art, the present invention proposes a scramjet engine sealing structure.

[0005] The present invention provides a scramjet engine sealing structure, comprising:

[0006] A first flange, the first flange having a first surface, the first surface being provided with a first seating groove; and

[0007] a second flange, the second flange having a second surface, the second surface being provided with a second mounting groove;

[0008] When the first flange and the second flange are in an assembled state, the first surface fits the second surface, and the first mounting groove and the second mounting groove are combined to form a sealing groove, and the sealing groove is provided with a first sealing ring, one end of the first sealing ring is located in the first mounting groove, and the other end is located in the second mounting groove.

[0009] In one embodiment, the first sealing ring is a copper sealing ring.

[0010] In one embodiment, the sealing groove is further provided with a second sealing ring and a third sealing ring, the second sealing ring is provided in the first mounting groove, the third sealing ring is provided in the second mounting groove, and the first sealing ring is located between the second sealing ring and the third sealing ring.

[0011] In one embodiment, the second sealing ring and the third sealing ring are both graphite sealing rings.

[0012] In one embodiment, the width of the sealing groove is 6 mm, and the depth of the sealing groove is 2 mm; the width of the first sealing ring is 4 mm, and the thickness is 3 mm; the width of the second sealing ring and the third sealing ring are both 4 mm, and the depth of the second sealing ring and the third sealing ring are both 0.5 mm.

[0013] In one embodiment, the side walls of the first seating groove and the side walls of the second seating groove are both provided with grooves, and the second sealing ring and the third sealing ring are both provided with protrusions, the protrusion of the second sealing ring is used to be clamped in the groove of the first seating groove, and the protrusion of the third sealing ring is used to be clamped in the groove of the second seating groove.

[0014] In one embodiment, the first surface is provided with a limiting groove spaced apart from the first placement groove, and the second surface is provided with a limiting portion, wherein the limiting groove is for the limiting portion to be inserted.

[0015] In one embodiment, the shapes of the first flange and the second flange are both rectangular, the limiting groove is arranged between the first mounting groove and the edge of the first flange, and the limiting groove penetrates the first flange along the width direction of the first flange.

[0016] In one embodiment, the width of the limiting groove gradually decreases from the groove opening of the limiting groove to the groove bottom of the limiting groove along the depth direction of the limiting groove, and the side wall of the limiting groove is used to guide the limiting portion.

[0017] In one embodiment, a connecting member is further included, wherein the connecting member connects the first flange and the second flange, the connecting member is located between the first seating groove and the edge of the first flange, and the connecting member is located between the second seating groove and the edge of the second flange.

[0018] The above technical features can be combined in various suitable ways or replaced by equivalent technical features as long as the purpose of the present invention can be achieved.

[0019] The scramjet engine sealing structure provided by the present invention has at least the following beneficial effects compared with the prior art:

[0020] A scramjet engine sealing structure of the present invention can isolate a gap formed between a first surface of a first flange and a second surface of a second flange, thereby preventing high-temperature and high-pressure air or gas from leaking through the gap between the first flange and the second flange. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings, wherein:

[0022] Figure 1 A transparent exploded view showing the sealing structure of the present invention;

[0023] Figure 2 A partial structural schematic diagram of the sealing structure of the present invention in an assembled state is shown.

[0024] In the drawings, like reference numerals are used for like parts. The drawings are not necessarily to scale.

[0025] Reference numerals:

[0026] 1- Sealing structure;

[0027] 11-first flange; 111-first surface; 112-first placement groove; 113-limiting groove;

[0028] 12-second flange; 121-second surface; 122-second placement groove; 123-limiting portion;

[0029] 131 - sealing groove; 132 - first sealing ring; 133 - second sealing ring; 134 - third sealing ring;

[0030] 141-groove; 142-protrusion;

[0031] 15-Connectors. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings.

[0033] Please also read Figure 1 and Figure 2 The present invention provides a scramjet engine sealing structure 1, comprising a first flange 11 and a second flange 12. The first flange 11 has a first surface 111, and the first surface 111 is provided with a first placement groove 112. The second flange 12 has a second surface 121, and the second surface 121 is provided with a second placement groove 122. When the first flange 11 and the second flange 12 are in an assembled state, the first surface 111 fits with the second surface 121, and the first placement groove 112 and the second placement groove 122 are enclosed to form a sealing groove 131, and the sealing groove 131 is provided with a first sealing ring 132, one end of the first sealing ring 132 is located in the first placement groove 112, and the other end is located in the second placement groove 122.

[0034] Among them, the first flange 11 and the second flange 12 are used to connect different components of the scramjet engine. For example, the first flange 11 and the second flange 12 can be connected between the air inlet and the combustion chamber, between the combustion chamber and the tail nozzle, or between the sections of the combustion chamber itself, which is not limited here.

[0035] During the installation process of this embodiment, the first sealing ring 132 is placed in the first mounting groove 112 or the second mounting groove 122, and then the first surface 111 of the first flange 11 is aligned with the second surface 121 of the second flange 12, and the first flange 11 and the second flange 12 are approached to each other until the first surface 111 of the first flange 11 and the second surface 121 of the second flange 12 are in contact with each other, and the first mounting groove 112 and the second mounting groove 122 are surrounded to form a closed sealing groove 131, and part of the first sealing ring 132 is located in the first mounting groove 112, and the other part is located in the second mounting groove 122.

[0036] For example, during the installation process, the first surface 111 of the first flange 11 can be generally facing upward, and the first sealing ring 132 is placed in the first receiving groove, and a portion of the first sealing ring 132 protrudes from the notch of the first receiving groove; the second surface 121 of the second flange 12 is generally facing downward, and the second surface 121 is directly opposite to the first surface 111, and the second receiving groove is directly opposite to the first receiving groove. The first flange 11 and the second flange 12 are close to each other until the first surface 111 of the first flange 11 and the second surface 121 of the second flange 12 fit each other, and the first placement groove 112 and the second placement groove 122 are enclosed to form a sealing groove 131, at which time the portion of the first sealing ring 132 protruding from the first placement groove 112 is located in the second placement groove 122.

[0037] In this embodiment, one end of the first sealing ring 132 is located in the first mounting groove 112, and the other end is located in the second mounting groove 122, which can isolate the gap formed between the first surface 111 of the first flange 11 and the second surface 121 of the second flange 12, thereby preventing high-temperature and high-pressure air or gas from leaking through the gap between the first flange 11 and the second flange 12.

[0038] In one embodiment, the first sealing ring 132 is a copper sealing ring.

[0039] Since copper has good plasticity and ductility, the first sealing ring 132 can fit tightly in the sealing groove 131 , and can effectively prevent high-temperature and high-pressure air or gas from leaking through the gap between the first flange 11 and the second flange 12 .

[0040] In some other implementations, the first sealing ring 132 may also be made of brass or the like.

[0041] Please continue reading Figure 1 and Figure 2 In one embodiment, the sealing groove 131 is further provided with a second sealing ring 133 and a third sealing ring 134 , the second sealing ring 133 is provided in the first mounting groove 112 , the third sealing ring 134 is provided in the second mounting groove 122 , and the first sealing ring 132 is located between the second sealing ring 133 and the third sealing ring 134 .

[0042] The first sealing ring 132 is disposed between the second sealing ring 133 and the third sealing ring 134 , so that the first sealing ring 132 , the second sealing ring 133 and the third sealing ring 134 form a multiple sealing design, which significantly improves the sealing performance of the sealing groove 131 .

[0043] During the installation process of this embodiment, the second sealing ring 133 is first placed in the first mounting groove 112, and the third sealing ring 134 is placed in the second mounting groove 122, and then the first sealing ring 132 is placed in the first mounting groove 112 or the second mounting groove 122, and the first surface 111 of the first flange 11 is directly opposite to the second surface 121 of the second flange 12, and the first flange 11 and the second flange 12 are close to each other until the first surface 111 of the first flange 11 and the second surface 121 of the second flange 12 are fitted, and the first mounting groove 112 and the second mounting groove 122 are surrounded to form a closed sealing groove 131, and part of the first sealing ring 132 is located in the first mounting groove 112, and the other part is located in the second mounting groove 122.

[0044] For example, during the installation process, the first surface 111 of the first flange 11 can be generally facing upward, the second sealing ring 133 is placed in the first receiving groove, and the second sealing ring 133 is adjacent to or abuts the groove bottom of the first receiving groove, and then the first sealing ring 132 is placed in the first receiving groove, so that the first sealing ring 132 abuts the second sealing ring 133, and a portion of the first sealing ring 132 protrudes from the notch of the first receiving groove. The second surface 121 of the second flange 12 is generally facing downward, the third sealing ring 134 is placed in the second receiving groove, and the third sealing ring 134 is adjacent to or abuts the groove bottom of the second receiving groove, the second surface 121 is directly opposite to the first surface 111, and the second receiving groove is directly opposite to the first receiving groove. The first flange 11 and the second flange 12 are close to each other until the first surface 111 of the first flange 11 and the second surface 121 of the second flange 12 fit together, and the first mounting groove 112 and the second mounting groove 122 are enclosed to form a sealing groove 131. At this time, the part of the first sealing ring 132 protruding from the first mounting groove 112 is located in the second mounting groove 122.

[0045] In some other implementations, the sealing groove 131 may also be provided with only the first sealing ring 132 .

[0046] In one embodiment, the second sealing ring 133 and the third sealing ring 134 are both graphite sealing rings.

[0047] The second sealing ring 133 and the third sealing ring 134 are made of graphite. Since graphite has excellent sealing performance, the second sealing ring 133 and the third sealing ring 134 can ensure the sealing performance of the sealing groove 131. In addition, since graphite has excellent high temperature resistance, the second sealing ring 133 and the third sealing ring 134 are made of graphite, which can withstand the high temperature gas or fuel gas inside the scramjet engine, thereby improving the sealing performance.

[0048] In some other embodiments, the second sealing ring 133 and the third sealing ring 134 are both made of polymer materials such as polyimide.

[0049] In one embodiment, the width of the sealing groove 131 is 6 mm, and the depth of the sealing groove 131 is 2 mm; the width of the first sealing ring 132 is 4 mm, and the thickness is 3 mm; the width of the second sealing ring 133 and the third sealing ring 134 are both 4 mm, and the depth of the second sealing ring 133 and the third sealing ring 134 are both 0.5 mm.

[0050] In some other embodiments, the sizes of the sealing groove 131 , the first sealing ring 132 , the second sealing ring 133 and the third sealing ring 134 may be other values, which are not limited here.

[0051] See also Figure 2 In one embodiment, the side walls of the first mounting groove 112 and the side walls of the second mounting groove 122 are both provided with a groove 141, and the second sealing ring 133 and the third sealing ring 134 are both provided with a protrusion 142, and the protrusion 142 of the second sealing ring 133 is used to be clamped in the groove 141 of the first mounting groove 112, and the protrusion 142 of the third sealing ring 134 is used to be clamped in the groove 141 of the second mounting groove 122.

[0052] When the protrusion 142 of the second sealing ring 133 is clamped in the groove 141 of the side wall of the first mounting groove 112, the second sealing ring 133 can be fixed in the first mounting groove 112. Similarly, when the protrusion 142 of the third sealing ring 134 is clamped in the groove 141 of the side wall of the second mounting groove 122, the third sealing ring 134 can be fixed in the second mounting groove 122.

[0053] During the installation process of this embodiment, the protrusion 142 of the second sealing ring 133 is firstly clamped in the groove 141 of the first installation groove 112, so that the second sealing ring 133 is fixed to the first installation groove 112; at the same time, the protrusion 142 of the third sealing ring 134 is clamped in the groove 141 of the second installation groove 122, so that the third sealing ring 134 is fixed to the second installation groove 122. Then the first sealing ring 132 is placed in the first installation groove 112 or the second installation groove 122, and the first surface 111 of the first flange 11 is directly opposite to the second surface 121 of the second flange 12, and the first flange 11 and the second flange 12 are close to each other until the first surface 111 of the first flange 11 and the second surface 121 of the second flange 12 are in contact, and the first installation groove 112 and the second installation groove 122 are surrounded to form a closed sealing groove 131, and part of the first sealing ring 132 is located in the first installation groove 112, and the other part is located in the second installation groove 122.

[0054] For example, during the installation process, the first surface 111 of the first flange 11 can be generally facing upward, and the protrusion 142 of the second sealing ring 133 is clamped in the groove 141 of the first installation groove 112, so that the second sealing ring 133 is fixed to the first installation groove 112, and the second sealing ring 133 is adjacent to or abuts the bottom of the first receiving groove, and then the first sealing ring 132 is placed in the first receiving groove, so that the first sealing ring 132 abuts the second sealing ring 133, and a portion of the first sealing ring 132 protrudes from the notch of the first receiving groove. The second surface 121 of the second flange 12 is generally facing downward, and the protrusion 142 of the third sealing ring 134 is clamped in the groove 141 of the second installation groove 122, so that the third sealing ring 134 is fixed to the second installation groove 122, and the third sealing ring 134 is adjacent to or abuts the bottom of the second receiving groove, and the second surface 121 is directly opposite to the first surface 111, and the second receiving groove is directly opposite to the first receiving groove. The first flange 11 and the second flange 12 are close to each other until the first surface 111 of the first flange 11 and the second surface 121 of the second flange 12 fit together, and the first mounting groove 112 and the second mounting groove 122 are enclosed to form a sealing groove 131. At this time, the part of the first sealing ring 132 protruding from the first mounting groove 112 is located in the second mounting groove 122.

[0055] In this embodiment, the second sealing ring 133 is fixed in the first mounting groove 112 by means of a clamping method, so that the second sealing ring 133 can be prevented from being separated from the first mounting groove 112 during the installation process, and the second sealing ring 133 can be prevented from shaking in the first mounting groove 112. Similarly, the third sealing ring 134 is fixed in the second mounting groove 122 by means of a clamping method, so that the third sealing ring 134 can be prevented from being separated from the second mounting groove 122 during the installation process, and the third sealing ring 134 can be prevented from shaking in the second mounting groove 122.

[0056] In some other embodiments, the second sealing ring 133 may be fixed to the first mounting groove 112 by means of interference fit, and the third sealing ring 134 may also be fixed to the second mounting groove 122 by means of interference fit.

[0057] See also Figure 2 In one embodiment, the first surface 111 is provided with a limiting groove 113 spaced apart from the first placement groove 112 , and the second surface 121 is provided with a limiting portion 123 , and the limiting groove 113 is for the limiting portion 123 to be inserted.

[0058] During the assembly process, the second surface 121 may not be directly opposite to the first surface 111, but may be slightly offset, so that the first receiving groove and the second receiving groove are not directly opposite. In order to solve this problem, in this embodiment, a limiting groove 113 is provided on the first surface 111, and a limiting portion 123 is provided on the second surface 121. When the second surface 121 is slightly offset relative to the first surface 111 during the installation process, the limiting portion 123 abuts against the first surface 111. At this time, the relative position between the limiting portion 123 and the limiting groove 113 can be adjusted by moving the second flange 12 until the limiting portion 123 is inserted into the limiting groove 113. It can be understood that when the limiting portion 123 is inserted into the limiting groove 113, the limiting groove 113 limits the limiting portion 123, that is, the limiting groove 113 limits the movement of the limiting portion 123, thereby limiting the relative position of the first flange 11 and the second flange 12 in the assembly state.

[0059] The cooperation between the limiting groove 113 and the limiting portion 123 can ensure that the first flange 11 and the second flange 12 can be accurately positioned during assembly, thereby reducing the assembly time between the first flange 11 and the second flange 12 and improving the assembly efficiency between the first flange 11 and the second flange 12. In addition, the cooperation between the limiting groove 113 and the limiting portion 123 can further improve the stability between the first flange 11 and the second flange 12.

[0060] In some other embodiments, the limiting groove 113 may also be connected to the first mounting groove 112 .

[0061] Please continue reading Figure 2 In one embodiment, the shapes of the first flange 11 and the second flange 12 are both rectangular, and the limiting groove 113 is arranged between the first mounting groove 112 and the edge of the first flange 11 , and the limiting groove 113 penetrates the first flange 11 along the width direction of the first flange 11 .

[0062] It can be understood that there are two situations in which the second surface 121 is slightly offset relative to the first surface 111. The first situation is that the extension direction of the limiting portion 123 is parallel to the extension direction of the limiting groove 113, and the second situation is that the extension direction of the limiting portion 123 is relatively inclined to the extension direction of the limiting groove 113.

[0063] For the first case, in this embodiment, after the limiting portion 123 abuts against the first surface 111, the second flange 12 is moved along the length direction of the first flange 11 until the limiting portion 123 is inserted into the limiting groove 113, and then the relative position of the second flange 12 and the first flange 11 is adjusted along the width direction of the first flange 11 to be in the assembled state.

[0064] For the second situation, in this embodiment, after the limiting portion 123 abuts against the first surface 111, the second flange 12 is rotated along the first surface 111 until the extension direction of the limiting portion 123 is the same as the extension direction of the limiting groove 113, and then the second flange 12 is moved along the length direction of the first flange 11 until the limiting portion 123 is inserted into the limiting groove 113, and then the relative position of the second flange 12 and the first flange 11 is adjusted along the width direction of the first flange 11 to be in the assembled state.

[0065] In some other embodiments, the shapes of the first flange 11 and the second flange 12 may also be other shapes.

[0066] Please continue reading Figure 2 In one embodiment, the width of the limiting groove 113 gradually decreases from the groove opening of the limiting groove 113 to the groove bottom of the limiting groove 113 along the depth direction of the limiting groove 113 , and the side wall of the limiting groove 113 is used to guide the limiting portion 123 .

[0067] In this embodiment, the side wall of the limiting groove 113 provides a clear guiding path for the insertion of the limiting portion 123, that is, the limiting portion 123 can slide along the side wall of the limiting groove 113, so that the limiting portion 123 can be inserted into the limiting groove 113, which can reduce the difficulty of inserting the limiting portion 123 into the limiting groove 113 and improve the efficiency of inserting the limiting portion 123 into the limiting groove 113.

[0068] In some other embodiments, the width of the limiting groove 113 may also remain unchanged along the depth direction of the limiting groove 113 .

[0069] See also Figure 1 In one embodiment, it also includes a connecting member 15, which connects the first flange 11 and the second flange 12, and the connecting member 15 is located between the first mounting groove 112 and the edge of the first flange 11 and between the second mounting groove 122 and the edge of the second flange 12.

[0070] The connecting member 15 may be a bolt or other connecting parts, which is not limited here.

[0071] The first flange 11 and the second flange 12 are connected by the connecting piece 15 , so as to prevent the first flange 11 and the second flange 12 from being loosened or misaligned.

[0072] In some other embodiments, the first flange 11 and the second flange 12 may also be connected by a snap-fitting manner.

[0073] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "bottom", "top", "front", "back", "inside", "outside", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0074] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the features of the various dependent claims and herein may be combined in a manner different from that described in the original claims. It should also be understood that the features described in conjunction with the individual embodiments may be used in other embodiments.

Claims

1. A scramjet engine sealing structure, characterized in that: include: A first flange, wherein the first flange has a first surface, and the first surface is provided with a first placement groove; as well as a second flange, the second flange having a second surface, the second surface being provided with a second mounting groove; When the first flange and the second flange are in an assembled state, the first surface fits the second surface, and the first mounting groove and the second mounting groove are combined to form a sealing groove, and the sealing groove is provided with a first sealing ring, one end of the first sealing ring is located in the first mounting groove, and the other end is located in the second mounting groove.

2. The scramjet engine sealing structure according to claim 1, characterized in that: The first sealing ring is a copper sealing ring.

3. The scramjet engine sealing structure according to claim 1, characterized in that: The sealing groove is further provided with a second sealing ring and a third sealing ring, wherein the second sealing ring is provided in the first placement groove, the third sealing ring is provided in the second placement groove, and the first sealing ring is located between the second sealing ring and the third sealing ring.

4. The scramjet engine sealing structure according to claim 3, characterized in that: The second sealing ring and the third sealing ring are both graphite sealing rings.

5. The scramjet engine sealing structure according to claim 3, characterized in that: The width of the sealing groove is 6mm, and the depth of the sealing groove is 2mm; the width of the first sealing ring is 4mm, and the thickness is 3mm; the width of the second sealing ring and the third sealing ring are both 4mm, and the depth of the second sealing ring and the third sealing ring are both 0.5mm.

6. The scramjet engine sealing structure according to claim 3, characterized in that: The side walls of the first seating groove and the side walls of the second seating groove are both provided with grooves, and the second sealing ring and the third sealing ring are both provided with protrusions, the protrusion of the second sealing ring is used to be clamped in the groove of the first seating groove, and the protrusion of the third sealing ring is used to be clamped in the groove of the second seating groove.

7. The scramjet engine sealing structure according to any one of claims 1 to 6, characterized in that: The first surface is provided with a limiting groove spaced apart from the first placement groove, and the second surface is provided with a limiting portion, wherein the limiting groove is used for inserting the limiting portion.

8. The scramjet engine sealing structure according to claim 7, characterized in that: The shapes of the first flange and the second flange are both rectangular. The limiting groove is arranged between the first mounting groove and the edge of the first flange. The limiting groove penetrates the first flange along the width direction of the first flange.

9. The scramjet engine sealing structure according to claim 8, characterized in that: The width of the limiting groove gradually decreases from the groove opening of the limiting groove to the groove bottom of the limiting groove along the depth direction of the limiting groove, and the side wall of the limiting groove is used to guide the limiting portion.

10. The scramjet engine sealing structure according to claims 1-6, characterized in that: It also includes a connecting piece, which connects the first flange and the second flange, and is located between the first mounting groove and the edge of the first flange, and between the second mounting groove and the edge of the second flange.

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