High-pressure swing hose for rocket engine and production process

Abstract

The invention relates to a high-pressure swing hose for a rocket engine, which comprises three or more layers of corrugated pipes, two ends of each corrugated pipe are coaxially fixed on the inner wall of a joint, and a plurality of reinforcing rings are coaxially mounted on the outer wall of each corrugated pipe at intervals and are suitable for reinforcing the strength of the corrugated pipe; and the net sleeves are coaxially attached to the outer side of the corrugated pipe in a wrapping mode, the net sleeves are arranged in two or more layers, and the two ends of each net sleeve are coaxially buckled on the outer wall of the corresponding connector through the net pressing rings. The swing hose comprises a net sleeve and a corrugated pipe which are coaxially arranged at intervals, and connectors are jointly installed at the two ends of the net sleeve and the two ends of the corrugated pipe, so that the net sleeve and the corrugated pipe form an integral structure; the net cover is of a woven net structure, it is guaranteed that the net cover and the corrugated pipe have the bending and swinging capacity, certain structural strength is achieved, the quality of the swinging hose is improved, and the service life is long.

Description

Technical Field

[0001] The invention belongs to the technical field of swing hoses and relates to a swing hose for a rocket engine, in particular to a high-pressure swing hose for a rocket engine and a production process. Background Art

[0002] The swing hose is a component inside a rocket engine that can adjust the engine's attitude. It has both elastic and sealing properties, and can produce axial, angular and combined displacements under the action of external forces and torques. It is widely used in the aerospace field. Due to the characteristics of the swing hose and the requirements of the application environment, how to improve the flexibility and pressure resistance of the swing hose while ensuring the structural strength is a key issue to be overcome.

[0003] Therefore, we propose a high-pressure swing hose and production process for rocket engines to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a high-strength, high-flexibility, high-pressure swing hose and a production process for rocket engines.

[0005] To solve the above problems, the technical solution of the present invention is:

[0006] A high-pressure swing hose for a rocket engine, comprising:

[0007] The bellows is provided with three or more layers, both ends of which are coaxially fixed on the inner wall of the joint, and a plurality of reinforcing rings are coaxially installed on the outer wall of the bellows at intervals, which are suitable for reinforcing the strength of the bellows;

[0008] The mesh sleeve is coaxially and tightly wrapped around the outside of the corrugated pipe. The mesh sleeve is arranged in two or more layers, and both ends are coaxially buckled and pressed on the outer wall of the joint through a mesh pressing ring.

[0009] In a further embodiment, the outer wall of the joint and the inner wall of the pressing mesh ring are both smooth surfaces.

[0010] In a further embodiment, the outer wall of the joint and the inner wall of the mesh pressing ring are flat and suitable for fixing the mesh sleeve.

[0011] In a further embodiment, at least one inward annular groove is formed on the outer wall of the joint, and at least one annular protrusion corresponding to the annular groove is formed on the inner wall of the pressing ring.

[0012] In a further embodiment, the end of the mesh sleeve, the outer end surface of the mesh pressing ring, and the outer end surface of the joint are fixedly installed together by welding to form a weld bead, which is suitable for firmly connecting the three into a whole.

[0013] In a further embodiment, a reinforcement ring is coaxially disposed in the wave valley of the bellows.

[0014] In a further embodiment, the mesh sleeve is provided in two layers and the bellows is provided in three layers.

[0015] A production process for a high-pressure swing hose for a rocket engine comprises the following steps:

[0016] S101, making bellows

[0017] Making bellows;

[0018] S103, installation connector

[0019] Fix the two ends of the bellows in the joint;

[0020] S105, install the net

[0021] Weave a mesh sleeve on the outside of the bellows and joints;

[0022] S107, install the pressure ring

[0023] Install and tighten the mesh pressing ring onto the two ends of the mesh sleeve.

[0024] In a further embodiment, in step S107, the mesh pressing ring is installed, after the mesh pressing ring is put on the outside of the mesh sleeve, the mesh pressing ring is pressed onto the mesh sleeve by a crimping machine.

[0025] In a further embodiment, in step S107 of installing the pressing mesh ring, after fastening the pressing mesh ring, the outer end surface of the joint, the outer end surface of the pressing mesh ring and the end of the mesh sleeve are welded together to form a weld bead.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The swing hose comprises a mesh sleeve and a bellows which are coaxially spaced apart. Joints are installed at both ends of the mesh sleeve and the bellows, so that the mesh sleeve and the bellows form an integral structure. The mesh sleeve adopts a woven mesh structure to ensure that the mesh sleeve and the bellows have bending and swinging capabilities and have a certain structural strength, thereby improving the quality of the swing hose and extending its service life.

[0028] 2. The mesh sleeve of the swing hose is arranged in two layers, and the bellows is arranged in three layers, so that the mesh sleeve and the bellows can improve the structural strength while ensuring flexibility; and a number of reinforcing rings are set on the outer wall of the bellows at intervals to further improve the strength of the bellows, so that the bellows can be used stably in a high-pressure environment.

[0029] 3. A bellows is welded on the inner side of the joint of the swing hose, and a mesh ring is mounted on the outer side of the mesh sleeve. The mesh sleeve is clamped between the joint and the mesh ring, which can disperse the force acting on the mesh sleeve from the weld to the entire contact surface between the mesh ring and the mesh sleeve, thereby extending the service life of the mesh sleeve. The outer wall of the joint and the inner wall of the mesh ring are smooth surfaces to avoid wear on the mesh sleeve during swinging. The outer wall of the joint and the inner wall of the mesh ring can be flat or curved, which can increase the upper limit of the force that the mesh sleeve can withstand. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic diagram of a high-pressure swing hose for a rocket engine;

[0031] Figure 2 for Figure 1 One of the enlarged images at A in the middle;

[0032] Figure 3 for Figure 1 The second enlarged picture of A in the middle;

[0033] Figure 4 The present invention is a flow chart of a production process of a high-pressure swing hose for rocket engines.

[0034] In the figure: 1. mesh sleeve; 2. joint; 3. bellows; 31. reinforcement ring; 4. weld bead; 5. mesh pressing ring. DETAILED DESCRIPTION

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions 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 limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0036] Embodiment 1:

[0037] A high pressure swing hose for a rocket engine, such as Figures 1 to 3As shown, it includes a mesh sleeve 1, a pair of joints 2 and a bellows 3. The bellows 3 is coaxially arranged on the inner side of the mesh sleeve 1. The mesh sleeve 1 is tightly attached to the outer side of the bellows 3. Both ends of the mesh sleeve 1 and the bellows 3 are fixed on a pair of joints 2 to form an integral swing hose.

[0038] The mesh sleeve 1 is a mesh structure formed by weaving a number of metal wires. The mesh structure has two layers, which can improve the flexibility of the mesh sleeve 1 while ensuring the strength of the mesh sleeve 1. The metal wires of each layer are inclined and divided into two directions, so that a number of V-shaped lines are formed on the surface of the mesh structure; the bellows 3 is formed by overlapping and installing three layers of metal bellows, which can improve the flexibility of the bellows 3 while ensuring the strength of the bellows 3. Reinforcement rings 31 are fixedly installed in a number of troughs on the outer wall of the bellows 3. The inner side surface of the reinforcement ring 31 is a curved structure and corresponds to the shape of the trough. The outer side surface of the reinforcement ring 31 can be a curved structure, a plane structure or other structures that meet the installation requirements. In this embodiment, the outer side surface of the reinforcement ring 31 is a curved structure; the reinforcement ring 31 can improve the structural strength of the bellows 3 and ensure that the bellows 3 can be used normally in a high-pressure environment.

[0039] like Figure 2 As shown, the joint 2 is a circular ring structure, the joint 2 is located at the end of the mesh sleeve 1 and the bellows 3, the bellows 3 is welded inside the joint 2, and the mesh ring 5 is mounted on the outside of the mesh sleeve 1, the mesh sleeve 1 is clamped between the joint 2 and the mesh ring 5, and the end of the mesh sleeve 1 is connected to the outer end surface of the joint 2 and the outer end surface of the mesh ring 5 by welding to form a weld bead 4, so that the three can form a firm and stable whole, improving the quality of the swing hose; the outer wall of the joint 2 and the inner wall of the mesh ring 5 are both smooth surfaces to avoid wear on the mesh sleeve 1 during the swinging process; as shown in FIG. Figure 2 As shown, the outer wall of the joint 2 and the inner wall of the pressing mesh ring 5 can be set to be a plane, or as shown in FIG. Figure 3 As shown, the outer wall of the joint 2 and the inner wall of the mesh pressing ring 5 are set as corresponding curved surfaces. For example, at least one inward annular groove is formed on the outer wall of the joint 2, and at least one annular protrusion corresponding to the annular groove is formed on the inner wall of the mesh pressing ring 5. This can reduce the force acting on the mesh sleeve 1, improve the quality of the mesh sleeve 1, and extend its service life.

[0040] Embodiment 2:

[0041] The number of layers of the mesh sleeve 1 can be set to one, three, four or more layers, and the number of layers of the bellows 3 can be set to two, four, five or more layers. The number of layers of both is determined according to the model, standard, and specific use environment of the swing hose.

[0042] Embodiment 3:

[0043] like Figure 4 As shown, a production process for a high-pressure swing hose for a rocket engine comprises the following steps:

[0044] S101, making bellows 3

[0045] According to the use requirements, the bellows 3 of corresponding size is made of stainless steel or other metal materials that meet the requirements.

[0046] S103, installation connector 2

[0047] Joints 2 are fixedly installed at both ends of the bellows 3. The joints 2 are of annular structure. The ends of the bellows 3 are fixed to the inner side surfaces of the joints 2 by welding.

[0048] S105, install the net 1

[0049] A double-layer mesh sleeve 1 is woven outside the corrugated pipe 3 and the joint 2 to ensure that the mesh sleeve 1 is closely attached to the outer wall of the corrugated pipe 3 .

[0050] S107, install the pressure ring 5

[0051] A pressing mesh ring 5 is mounted on the outer side of the mesh sleeve 1, so that the end of the mesh sleeve 1 is clamped between the joint 2 and the pressing mesh ring 5, and the pressing mesh ring 5 is pressed by a crimping machine, so that the pressing mesh ring 5, the mesh sleeve 1 and the joint 2 are closely fitted together, and the force applied to the swing hose during the movement is dispersed from the position of the weld bead 4 to the entire contact surface between the pressing mesh ring 5 and the mesh sleeve 1, thereby extending the service life of the mesh sleeve 1;

[0052] Finally, the end of the mesh sleeve 1 is welded, and the outer end face of the joint 2, the outer end face of the mesh ring 5 and the end of the mesh sleeve 1 are connected together by welding to form a weld bead 4, so that the joint 2, the mesh ring 5 and the mesh sleeve 1 form a whole, thereby improving the strength of the swing hose.

[0053] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A high-pressure swing hose for a rocket engine, characterized in that: include: The bellows (3) is provided with at least one layer, and both ends are coaxially fixed on the inner wall of the joint (2). A plurality of reinforcing rings (31) are coaxially installed at intervals on the outer wall of the bellows (3), which are suitable for reinforcing the strength of the bellows (3); The mesh sleeve (1) is coaxially and tightly wrapped around the outside of the corrugated pipe (3); the mesh sleeve (1) is provided with at least one layer, and both ends are coaxially buckled and pressed on the outer wall of the joint (2) through a mesh pressing ring (5).

2. The high-pressure swing hose for a rocket engine according to claim 1, characterized in that: The outer wall of the joint (2) and the inner wall of the pressing mesh ring (5) are both smooth surfaces.

3. The high-pressure swing hose for a rocket engine according to claim 2, characterized in that: The outer wall of the joint (2) and the inner wall of the mesh pressing ring (5) are flat surfaces, suitable for fixing the mesh sleeve (1).

4. The high-pressure swing hose for a rocket engine according to claim 2, characterized in that: At least one inwardly-pointing annular groove is formed on the outer wall of the joint (2), and at least one annular protrusion corresponding to the annular groove is formed on the inner wall of the pressing mesh ring (5).

5. The high-pressure swing hose for a rocket engine according to claim 1, characterized in that: The end of the mesh sleeve (1), the outer end surface of the mesh pressing ring (5), and the outer end surface of the joint (2) are fixedly mounted together by welding to form a weld bead (4), which is suitable for firmly connecting the three into a whole.

6. The high-pressure swing hose for a rocket engine according to claim 1, characterized in that: The reinforcing ring (31) is coaxially sleeved in the wave valley of the corrugated tube (3).

7. The high-pressure swing hose for a rocket engine according to any one of claims 1 to 6, characterized in that: The mesh sleeve (1) is provided with two layers, and the corrugated tube (3) is provided with three layers.

8. A production process for a high-pressure swing hose for a rocket engine, characterized in that: The following steps are involved: S101, making bellows (3) Producing a corrugated tube (3) as claimed in any one of claims 1 to 7; S103, installation connector (2) Fixing the two ends of the corrugated tube (3) in the joint (2); S105, install the mesh (1) The mesh sleeve (1) is braided outside the corrugated tube (3) and the joint (2); S107, install the pressure ring (5) The mesh pressing ring (5) is mounted on and pressed tightly onto the two ends of the mesh sleeve (1).

9. The production process of a high-pressure swing hose for a rocket engine according to claim 8, characterized in that: In the step S107 of installing the mesh pressing ring (5), after the mesh pressing ring (5) is sleeved on the outside of the mesh sleeve (1), the mesh pressing ring (5) is pressed tightly onto the mesh sleeve (1) by a crimping machine.

10. The production process of a high-pressure swing hose for a rocket engine according to claim 9, characterized in that: In the step S107 of installing the pressing mesh ring (5), after fastening the pressing mesh ring (5), the outer end surface of the joint (2), the outer end surface of the pressing mesh ring (5) and the end of the mesh sleeve (1) are welded together to form the weld bead (4).

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