High-performance composite high-pressure swing hose for airspace engine

Abstract

The utility model provides a high-performance composite high-pressure swing hose for an airspace engine. The high-performance composite high-pressure swing hose comprises a metal corrugated pipe, a connecting part, a fixing device and at least one layer of flexible net sleeve. The connecting parts are located at the two ends of the metal corrugated pipe and fixedly connected with the metal corrugated pipe, and the flexible net sleeves are arranged on the outer sides of the metal corrugated pipe and the connecting parts in a sleeving mode and tightly attached to the circumferential outer surfaces of the metal corrugated pipe and the connecting parts. The two ends of the flexible net sleeve are fixed to the connecting parts through the fixing devices, and the flexible net sleeve can stretch out and draw back along with the metal corrugated pipe. According to the high-pressure swing hose, metal friction between net sleeves and metal friction between the net sleeves and the corrugated pipe in an existing scheme can be avoided, the swing hose has the advantages of being long in service life, mature in net sleeve weaving process, light in weight and the like, and cost can be saved.

Description

Technical Field

[0001] The utility model relates to the technical field of rocket power, in particular to a high-performance composite high-pressure swing hose for a space engine. Background Art

[0002] With the rapid development of the space industry, various technologies involved in the rocket field have also advanced by leaps and bounds. The high-pressure swing hose of a space engine is mainly composed of a wire mesh sleeve and a corrugated pipe; the wire mesh sleeve is made of metal materials (steel wire or steel strip) by knitting, and is used to improve the pressure-bearing capacity of the corrugated pipe.

[0003] As a compensation component during the swing of a rocket engine, during the swing process, friction frequently occurs between the wire mesh sleeves and between the wire mesh sleeve and the corrugated pipe. Especially during the swing process with large angles and high pressures, the friction is more frequent, which may cause the corrugated pipe to be worn through and the wire mesh sleeve to be worn off, making it difficult to meet the service life requirements of reusable engines. In addition, during the knitting process of the wire mesh sleeve, the metal materials used need to have high strength, resulting in a relatively large hardness, making it difficult to use machines for knitting. Therefore, the wire mesh sleeve is mainly knitted manually, and usually multiple layers of wire mesh sleeves need to be knitted to meet the usage requirements, resulting in a relatively large overall weight and high cost of the high-pressure swing hose.

[0004] There is an urgent need to provide a high-pressure swing hose that can reduce the mutual friction between the wire mesh sleeves and between the wire mesh sleeve and the corrugated pipe, has good wear resistance, a long service life, a light weight, and can also save costs. Summary of the Invention

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a high-pressure swing hose that can reduce the mutual friction between the wire mesh sleeves and between the wire mesh sleeve and the corrugated pipe, and has the advantages of good wear resistance, a mature knitting process, a light weight, and cost savings.

[0006] The utility model provides a high-performance composite high-pressure swing hose for a space engine, which includes a metal corrugated pipe, a connection part, a fixing device, and at least one layer of flexible wire mesh sleeve. Among them,

[0007] The connection part is located at both ends of the metal corrugated pipe and is fixedly connected to the metal corrugated pipe. The flexible wire mesh sleeve is sleeved outside the metal corrugated pipe and the connection part and is tightly attached to the outer surfaces of the metal corrugated pipe and the connection part in the circumferential direction. Both ends of the flexible wire mesh sleeve are fixed on the connection part through the fixing device, and the flexible wire mesh sleeve can expand and contract with the metal corrugated pipe.

[0008] In the same embodiment, the metal corrugated pipe and the connection part are fixedly welded.

[0009] In the same embodiment, the connection part is a cylinder with both ends communicating.

[0010] In the same embodiment, the connecting portion includes a constricted portion and an equal-diameter portion, and one end of the connecting portion close to the metal bellows gradually contracts towards the other end of the connecting portion to the equal-diameter portion of the connecting portion.

[0011] In the same embodiment, a first annular boss is provided on the circumferential surface of the constricted portion of the connecting portion, and the first annular boss is fixedly connected to the connecting portion.

[0012] In the same embodiment, a second annular boss is provided on the equal-diameter portion of the connecting portion and close to the constricted portion of the connecting portion, and an annular groove is formed by the outer wall of the first annular boss, the second annular boss, and the connecting portion between the first annular boss and the second annular boss.

[0013] In the same embodiment, when intercepted along the axial direction parallel to the second annular boss, the cross-section of one end face of the second annular boss is an isosceles trapezoid, and the long side of the second annular boss is connected to the connecting portion, and the short side is away from the connecting portion.

[0014] In the same embodiment, the fixing device includes a first fixing inner ring and a second fixing inner ring that are sequentially arranged along the axial direction of the connecting portion and are used to press the flexible mesh sleeve for the first time. The first fixing inner ring is located inside the annular groove, and the inner side of the first fixing inner ring is matched with the annular groove and is in close contact with the inner wall of the annular groove; the second fixing inner ring is located outside the annular groove. Along the axial direction of the second fixing inner ring, one end face of the second fixing inner ring is in close contact with one end face of the second annular boss close to the second fixing inner ring, and the inner side of the second fixing inner ring is in close contact with the connecting portion.

[0015] In the same embodiment, a first fixing outer ring and a second fixing outer ring are respectively further provided on the circumferential outer sides of the first fixing inner ring and the second fixing inner ring; after the flexible mesh sleeve is pressed for the first time, the end of the flexible mesh sleeve is folded back, and the folded portion of the flexible mesh sleeve is located between the first fixing inner ring and the first fixing outer ring and between the second fixing inner ring and the second fixing outer ring. The first fixing outer ring and the second fixing outer ring are respectively used to cooperate with the first fixing inner ring and the second fixing inner ring to press the folded-back portion of the flexible mesh sleeve for the second time. The second fixing outer ring and the second fixing inner ring are in close contact to press the flexible mesh sleeve for the second time.

[0016] In the same embodiment, the flexible mesh sleeve is made of aramid fiber, carbon fiber, or a mixture of aramid fiber and carbon fiber.

[0017] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0018] In the swing hose of the present application, a flexible mesh sleeve is sleeved outside the metal bellows and the connecting part and is in close contact with the circumferential outer surfaces of the metal bellows and the connecting part. Both ends of the flexible mesh sleeve are fixed to the connecting part by fixing devices, and the flexible mesh sleeve can expand and contract with the metal bellows. By skillfully utilizing the wear resistance and elastic characteristics of the flexible mesh sleeve, hard contact with the metal bellows is effectively avoided, and the mutual friction between the mesh sleeves and between the mesh sleeve and the metal bellows is alleviated, thereby ensuring the integrity of the flexible mesh sleeve and the metal bellows and significantly improving the service life of the swing hose.

[0019] In addition, the swing hose of the present application adopts a mature process for weaving the flexible mesh sleeve, improving the weaving efficiency and quality, reducing the weight of the product, and saving the manufacturing cost.

[0020] It should be understood that the above general description and the following specific embodiments are only exemplary and explanatory, and they do not limit the scope of what the present utility model intends to claim. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The following drawings are part of the specification of the present utility model, which illustrate exemplary embodiments of the present utility model. The attached drawings, together with the description in the specification, are used to explain the principles of the present utility model.

[0022] Figure 1 It is a schematic structural diagram of the high-pressure swing hose in the embodiment of the present utility model;

[0023] Figure 2 It is a schematic structural diagram of the fixation of the flexible mesh sleeve in the embodiment of the present utility model;

[0024] Figure 3 It is a schematic structural diagram of the second annular boss of the solenoid valve in the embodiment of the present utility model.

[0025] Description of the reference numerals:

[0026] 1 Metal bellows 2 Connecting part

[0027] 3 Fixing device 4 Flexible mesh sleeve

[0028] 5 Second annular boss 6 First fixing inner ring

[0029] 7 First fixing outer ring DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] Now, various exemplary embodiments of the present utility model will be described in detail. This detailed description should not be considered as a limitation of the present utility model, but rather as a more detailed description of certain aspects, characteristics, and implementation schemes of the present utility model.

[0031] Without departing from the scope or spirit of the present utility model, various improvements and changes can be made to the specific implementation manners of the specification of the present utility model, which are obvious to those skilled in the art. Other implementation manners obtained from the specification of the present utility model are obvious to those skilled in the art. The specification and embodiments of this application are merely exemplary.

[0032] As Figure 1 、 Figure 2 and Figure 3 shown, the present utility model provides a high-performance composite high-pressure swing hose for a space engine, which includes a metal bellows 1, a connection part 2, a fixing device 3 and at least one layer of flexible mesh sleeve 4.

[0033] The connection part 2 is located at both ends of the metal bellows 1 and is fixedly connected to the metal bellows 1. The flexible mesh sleeve 4 is sleeved outside the metal bellows 1 and the connection part 2 and is in close contact with the outer circumferential surfaces of the metal bellows 1 and the connection part 2. Both ends of the flexible mesh sleeve 4 are fixed on the connection part 2 through the fixing device 3, and the flexible mesh sleeve 4 can expand and contract along with the metal bellows 1.

[0034] Specifically, a high-performance composite high-pressure swing hose for a space engine provided by an embodiment of the present utility model includes a metal bellows 1, a connection part 2, a fixing device 3 and at least one layer of flexible mesh sleeve 4. The swing hose of this application is sleeved outside the metal bellows 1 and the connection part 2 through the flexible mesh sleeve 4 and is in close contact with the outer circumferential surfaces of the metal bellows 1 and the connection part 2. Both ends of the flexible mesh sleeve 4 are fixed on the connection part 2 through the fixing device 3. The flexible mesh sleeve 4 of the high-pressure swing hose of this application can expand and contract along with the metal bellows 1, and the flexible mesh sleeve 4 has wear resistance and elastic characteristics, which can avoid hard contact with the metal bellows 1, reduce the mutual friction between the flexible mesh sleeve 4 and the flexible mesh sleeve 4, and between the flexible mesh sleeve 4 and the metal bellows 1, and improve the service life of the swing hose. In addition, the manufacturing process of the flexible mesh sleeve 4 is mature, which improves the manufacturing efficiency and quality of the mesh sleeve, and the manufactured product is light in weight, greatly saving the manufacturing cost.

[0035] It should be noted that, in order to make the metal bellows 1 and the connection part 2 closer and more firmly fixed, for example, the metal bellows 1 and the connection part 2 are fixed by welding.

[0036] In this embodiment, in order to ensure the structural stability of the connection part 2, for example, the connection part 2 is a cylinder with both ends communicating.

[0037] In the same embodiment, as Figure 1 shown, in order to facilitate the connection between the connection part 2 and the metal bellows 1, for example, the connection part 2 includes a shrinking part and an equal-diameter part. One end of the connection part 2 close to the metal bellows 1 gradually shrinks towards the other end of the connection part 2 to the equal-diameter part of the connection part 2. As Figure 1 andFigure 3 As shown, in order to increase the contact area between the flexible mesh sleeve 4 and the connecting portion 2, for example, a first annular boss is provided on the circumferential surface of the contracted portion of the connecting portion 2, and the first annular boss is fixedly connected to the connecting portion. A second annular boss 5 is provided on the equal-diameter portion of the connecting portion 2 and near the contracted portion of the connecting portion 2. The outer wall of the connecting portion 2 between the first annular boss, the second annular boss 5 and the first annular boss and the second annular boss 5 forms an annular groove.

[0038] In this embodiment, in order to ensure the structural stability of the second annular boss 5 and at the same time prevent the second annular boss 5 from displacing in the connecting portion 2, for example, when intercepted along the axial direction parallel to the second annular boss 5, the cross-section of one end face of the second annular boss 5 is an isosceles trapezoid, and the long side of the second annular boss 5 is welded to the connecting portion 2, and the short side is away from the connecting portion 2. The contact between the long side of the second annular boss 5 and the connecting portion 2 increases the contact area between the two, making the connection between the long side of the second annular boss 5 and the connecting portion 2 closer and the fixation more firm, thereby preventing the second annular boss 5 from changing its position or breaking relative to the connecting portion 2 due to excessive force.

[0039] In this embodiment, in order to facilitate the fixation of the flexible mesh sleeve 4, for example, the fixing device 3 includes a first fixing inner ring 7 and a second fixing inner ring that are sequentially arranged along the axial direction of the connecting portion 2 for first pressing the flexible mesh sleeve 4. The first fixing inner ring 6 is located inside the annular groove, and the inner side of the first fixing inner ring 6 is matched with the annular groove and is in close contact with the inner wall of the annular groove. The second fixing inner ring is located outside the annular groove. Along the axial direction of the second fixing inner ring, one end face of the second fixing inner ring is in close contact with one end face of the second annular boss 5 close to the second fixing inner ring, and the inner side of the second fixing inner ring is in close contact with the connecting portion 2. That is, the two end portions of the flexible mesh 4 are sleeved on the annular groove and the surface of the connecting portion 2 (the middle is wrapped outside the corrugated pipe to protect the corrugated pipe), and the flexible mesh sleeve 4 is first pressed and fixed by the first fixing inner ring 6 and the second fixing inner ring to prevent the flexible mesh sleeve 4 from displacing on the surface of the connecting portion, effectively protecting the surface of the metal corrugated pipe 1.

[0040] Such as Figure 1 and Figure 2As shown, in order to ensure that the flexible mesh sleeve 4 is fixed more firmly and prevent it from shifting under high pressure, for example, a first fixed outer ring 7 and a second fixed outer ring are respectively provided on the circumferential outer sides of the first fixed inner ring 6 and the second fixed inner ring; the first fixed outer ring 7 and the second fixed outer ring are respectively used to cooperate with the first fixed inner ring 6 and the second fixed inner ring. After the flexible mesh sleeve 4 is pressed once, the end of the flexible mesh sleeve 4 is folded back, so that the folded part of the flexible mesh sleeve 4 is located between the first fixed inner ring 6 and the first fixed outer ring 7, and the second fixed inner ring and the second fixed outer ring. By pressing the first fixed outer ring 6 and the second fixed outer ring, the folded part of the flexible mesh sleeve 4 is closely attached to the first fixed outer ring 7, the first fixed inner ring 6, the second fixed outer ring and the second fixed inner ring, thereby performing a secondary pressing on the flexible mesh sleeve 4.

[0041] Specifically, first, the first fixed inner ring 6 and the second fixed inner ring fix the flexible mesh sleeve 4 in the annular groove and on the surface of the connecting portion 2, that is, perform the first pressing and fixing on the flexible mesh sleeve 4. Then, the parts at both ends of the flexible mesh sleeve 4 are folded back and cover the outer surfaces (outer walls) of the first fixed inner ring 6 and the second fixed inner ring. Then, the first fixed outer ring cooperates with the first fixed inner ring and the second fixed outer ring cooperates with the second fixed inner ring to press the flexible mesh sleeve, that is, perform the second pressing and fixing on the flexible mesh sleeve.

[0042] In addition, in order to ensure that the flexible mesh sleeve 4 has the advantages of high elasticity and light weight, for example, the flexible mesh sleeve 4 can be made of aramid fiber, carbon fiber or a mixture of aramid fiber and carbon fiber. Additionally, in order to ensure the structural stability of the flexible mesh sleeve 4, for example, the parts of the two ends of the flexible mesh sleeve 4 in contact with the connecting portion are bonded with resin.

[0043] The above are only the schematic specific embodiments of the present invention. Without departing from the concept and principles of the present invention, any equivalent changes and modifications made by any person skilled in the art shall fall within the scope of protection of the present invention.

Claims

1. A high-performance composite high-pressure swing hose for an aerospace engine, characterized in that , comprising a metal bellows, a connecting portion, a fixing device and at least one layer of flexible mesh sleeve, wherein, The connecting part is located at both ends of the metal bellows and is fixedly connected to the metal bellows. The flexible mesh sleeve is arranged on the outside of the metal bellows and the connecting part and is tightly attached to the circumferential outer surface of the metal bellows and the connecting part. The two ends of the flexible mesh sleeve are fixed to the connecting part by the fixing device, and the flexible mesh sleeve can be expanded and contracted along with the metal bellows.

2. The aerospace engine high-performance composite high-pressure swing hose according to claim 1 is characterized in that , the metal bellows and the connecting part are welded and fixed.

3. The aerospace engine high-performance composite high-pressure swing hose according to claim 1 is characterized in that , the connecting part is a cylinder with two ends connected.

4. The aerospace engine high-performance composite high-pressure swing hose according to claim 3 is characterized in that: The connecting portion comprises a contraction portion and an equal-diameter portion, and one end of the connecting portion close to the metal bellows gradually contracts toward the other end of the connecting portion to the equal-diameter portion of the connecting portion.

5. The aerospace engine high-performance composite high-pressure swing hose according to claim 4 is characterized in that: A first annular boss is provided on the circumferential surface of the contraction portion of the connection portion, and the first annular boss is fixedly connected to the connection portion.

6. The aerospace engine high-performance composite high-pressure swing hose according to claim 5 is characterized in that A second annular boss is provided at the equal diameter portion of the connecting portion and close to the contraction portion of the connecting portion, and an annular groove is formed on the outer wall of the connecting portion between the first annular boss, the second annular boss and the first annular boss and the second annular boss.

7. The aerospace engine high-performance composite high-pressure swing hose according to claim 6 is characterized in that , intersecting along the axial direction parallel to the second annular boss, the cross-section of the end face of one end of the second annular boss is an isosceles trapezoid, and the long side of the second annular boss is connected to the connecting portion, and the short side is away from the connecting portion.

8. The aerospace engine high-performance composite high-pressure swing hose according to claim 7 is characterized in that The fixing device includes a first fixed inner ring and a second fixed inner ring which are sequentially arranged along the axial direction of the connecting portion for first pressing the flexible mesh sleeve, the first fixed inner ring is located inside the annular groove, the inner side of the first fixed inner ring is matched with the annular groove and is tightly attached to the inner wall of the annular groove; the second fixed inner ring is located outside the annular groove, and along the axial direction of the second fixed inner ring, one side end face of the second fixed inner ring is tightly attached to the one side end face of the second annular boss close to the second fixed inner ring, and the inner side of the second fixed inner ring is tightly attached to the connecting portion.

9. The aerospace engine high-performance composite high-pressure swing hose according to claim 8 is characterized in that The first fixed inner ring and the second fixed inner ring are respectively provided with a first fixed outer ring and a second fixed outer ring on the circumferential outer side; after the flexible mesh sleeve is compressed once, the end of the flexible mesh sleeve is folded in reverse, and the folded part of the flexible mesh sleeve is located between the first fixed inner ring and the first fixed outer ring and between the second fixed inner ring and the second fixed outer ring, and the first fixed outer ring and the second fixed outer ring are respectively used to cooperate with the first fixed inner ring and the second fixed inner ring to compress the reverse folded part of the flexible mesh sleeve for a second time.

10. The aerospace engine high-performance composite high-pressure swing hose according to claim 1, characterized in that The flexible mesh sleeve is made of aramid fiber, carbon fiber or a mixture of aramid fiber and carbon fiber.

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