A stainless steel rocket gas supply balance pressure joint

Abstract

The present invention discloses a stainless-steel rocket gas supply balance pressure joint, which relates to the technical field of rocket gas supply. The stainless-steel rocket gas supply balance pressure joint is provided with an on-board joint on the surface of the on-board panel, and a ground joint is installed on the ground panel. The ground joint is inserted into the interior of the on-board joint; an air supply hole is opened on the on-board joint, an inflation hole is opened on the ground joint, a sealing component for sealing is arranged on the ground joint, and a clamping structure for installing the ground joint on the ground panel is also arranged on the ground joint; a ventilation hole is also opened on the on-board joint. By getting rid of the traditional threaded fixed connection form of the gas supply joint and with the frequent disassembly of the ground part of the gas path joint, a structure with a boss at one end and an axial elastic retaining ring at the other end is used for fixing with the ground panel. With a balance pressure design, no back pressure will be exerted on the panel during the high and low pressure gas transmission process, greatly reducing the load requirement for the rocket ground panel, reducing the panel thickness and lowering the panel weight.

Description

Technical Field

[0001] The present invention relates to the technical field of rocket gas supply, and particularly to a stainless-steel rocket gas supply balance pressure joint. Background Art

[0002] In the aerospace field, a detachable gas supply socket is usually arranged at the tail end of a rocket, and multiple gas supply interfaces are arranged on the gas supply socket to achieve the quick docking and combined gas supply of multiple gas supply pipelines, so as to ensure the reliable transmission of normal-temperature gases such as nitrogen and air. For a gas supply connector docked with the on-board gas supply socket, it should have the ability of long-term reliable docking to ensure the reliability of gas supply; when the rocket ignites and takes off, it should also have the ability to adapt to the slight drift and roll of the rocket body during ignition and takeoff, and can achieve reliable detachment at zero second.

[0003] Before the launch of a cryogenic liquid rocket, it is necessary to supply various gases to the rocket. Traditional gas supply joints will cause back pressure on the on-board panel and the ground panel during the gas transmission process. Especially for high-pressure gas supply, when the back pressure is too high, it is necessary to increase the panel thickness to make up for it to prevent the panel from deforming due to back pressure and affecting the seal. In addition, the fixing method of traditional gas supply joints is mostly in the form of threads, and the docking and replacement operations are not convenient. Multiple disassembly is likely to cause thread jamming. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a stainless-steel rocket gas supply balance pressure joint, which solves the problems that traditional gas supply joints will cause back pressure on the on-board panel and the ground panel during the gas transmission process. Especially for high-pressure gas supply, when the back pressure is too high, it is necessary to increase the panel thickness to make up for it to prevent the panel from deforming due to back pressure and affecting the seal. In addition, the fixing method of traditional gas supply joints is mostly in the form of threads, and the docking and replacement operations are not convenient. Multiple disassembly is likely to cause thread jamming.

[0005] To achieve the above object, the present invention is realized through the following technical solutions: A stainless-steel rocket gas supply balance pressure joint includes an on-board panel and a ground panel. An on-board joint is installed on the surface of the on-board panel, and a ground joint is installed on the ground panel. The ground joint is inserted into the inside of the on-board joint; an air supply hole is opened on the on-board joint, an inflation hole is opened on the ground joint, a sealing component for sealing is arranged on the ground joint, and a clamping structure for installing the ground joint on the ground panel is also arranged on the ground joint; a ventilation hole is also opened on the on-board joint.

[0006] Further, the limited flow area of the air supply hole on the on-board joint is greater than the effective flow area of the balance joint, and the limited flow area of the inflation hole on the ground joint is greater than the effective flow area of the balance joint.

[0007] Further, the on-arrow joint includes a connecting portion and a fixing portion. The connecting portion and the fixing portion are fixedly welded together. The vent hole is opened on the surface of the fixing portion, and the ground joint is inserted into the interior of the fixing portion.

[0008] Further, the air supply hole includes a confluence portion and an inlet portion. The confluence portion is arranged inside the connecting portion, the inlet portion is arranged inside the fixing portion, and the confluence portion is in communication with the inlet portion.

[0009] Further, the inflation hole includes an air outlet portion and a circulation portion. There are multiple air outlet portions which are evenly arranged in an array around the central axis of the ground joint, and the air outlet portion is in communication with the circulation portion.

[0010] Further, an installation ear is fixedly connected to the surface of the fixing portion. The installation ear is fixedly connected to the on-arrow joint. The surface of the installation ear is movably connected to the surface of the on-arrow panel. The fixing portion movably penetrates through the on-arrow panel, and the installation ear is fixed to the on-arrow panel by an internal hexagonal bolt.

[0011] Further, a spring is arranged inside the fixing portion. One end of the spring is movably connected to the top of the inner side wall of the fixing portion, and the other end of the spring is movably connected to the top of the ground joint.

[0012] Further, the clamping structure includes a fixing boss. The fixing boss is fixedly connected to the ground joint. A fixing hole is opened on the surface of the ground panel, and a fixing groove is opened on the inner side wall of the fixing hole. The surface of the fixing boss is movably connected to the inner side wall of the fixing groove.

[0013] Further, a retaining ring groove is opened on the surface of the ground joint, and an axially elastic energy storage sealing ring is installed inside the retaining ring groove. The surface of the axially elastic energy storage sealing ring is movably connected to the surface of the ground panel.

[0014] Further, the sealing member includes two sealing grooves. The two sealing grooves are respectively located at the upper and lower parts of the inflation hole. Sealing rings are installed inside the two sealing grooves, and the surfaces of the two sealing rings are movably connected to the inner side wall of the fixing portion.

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

[0016] This stainless-steel rocket gas supply balanced pressure joint gets rid of the traditional threaded fixed connection form of the gas supply joint. The ground part of the gas path joint is frequently disassembled. It adopts a structure with a boss at one end and an axially elastic retaining ring at the other end to be fixed to the ground panel. The joint and the panel are in clearance fit, reducing the machining accuracy of the panel. With the balanced pressure design, no reverse pressure will be exerted on the panel during the high and low pressure gas transmission process, greatly reducing the load requirement on the rocket ground panel, reducing the panel thickness and the panel weight.

[0017] Of course, it is not necessary for any product implementing the present invention to achieve all the above-mentioned advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the on-board joint of the stainless steel rocket gas supply balance pressure joint based on the present invention.

[0019] Figure 2 It is a sectional view of the on-board joint of the stainless steel rocket gas supply balance pressure joint based on the present invention.

[0020] Figure 3 It is a sectional view after the overall connection of the stainless steel rocket gas supply balance pressure joint based on the present invention.

[0021] Figure 4 It is based on the stainless steel rocket gas supply balance pressure joint of the present invention Figure 3 and is an enlarged view of the structure at position A.

[0022] Figure 5 It is based on the stainless steel rocket gas supply balance pressure joint of the present invention Figure 3 and is an enlarged view of the structure at position B.

[0023] Figure 6 It is a schematic structural diagram of the ground panel of the stainless steel rocket gas supply balance pressure joint based on the present invention.

[0024] Figure 7 It is a schematic structural diagram of the ground joint of the stainless steel rocket gas supply balance pressure joint based on the present invention.

[0025] In the figure, 1 is the on-board joint; 101 is the connecting part; 102 is the fixing part; 2 is the spring; 3 is the ground joint; 4 is the ventilation hole; 5 is the inflation hole; 501 is the air outlet part; 502 is the circulation part; 6 is the on-board panel; 7 is the ground panel; 8 is the hexagon socket head bolt; 9 is the axial elastic energy storage sealing ring; 10 is the mounting ear; 11 is the fixing boss; 12 is the fixing hole; 13 is the air supply hole; 1301 is the confluence part; 1302 is the inlet part; 14 is the fixing groove; 15 is the snap ring groove; 16 is the sealing groove; 17 is the sealing ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0028] See also Figures 1-7 The embodiment of the present invention provides a technical solution: a rocket air supply balance pressure joint based on stainless steel, including an arrow panel 6 and a ground panel 7, an arrow joint 1 is installed on the surface of the arrow panel 6, and a ground joint 3 is installed on the ground panel 7, and the ground joint 3 is plugged into the interior of the arrow joint 1; an air supply hole 13 is provided on the arrow joint 1, and an inflation hole 5 is provided on the ground joint 3. A sealing component for sealing is provided on the ground joint 3, and a clamping structure for installing the ground joint 3 on the ground panel 7 is also provided on the ground joint 3; a vent hole 4 is also provided on the arrow joint 1.

[0029] Specifically, the limited flow area of the air supply hole 13 on the arrow joint 1 is larger than the effective flow area of the balancing joint, and the limited flow area of the inflation hole 5 on the ground joint 3 is larger than the effective flow area of the balancing joint.

[0030] In this embodiment, the limited flow area of the air supply hole 13 is larger than the effective flow area of the balancing joint and the limited flow area of the charging hole 5 is larger than the effective flow area of the balancing joint, which can make the gas flow smoothly and prevent poor gas flow.

[0031] Specifically, the arrow joint 1 includes a connecting portion 101 and a fixing portion 102 , the connecting portion 101 and the fixing portion 102 are fixedly welded together, the vent hole 4 is opened on the surface of the fixing portion 102 , and the ground joint 3 is inserted into the inside of the fixing portion 102 .

[0032] The air supply hole 13 includes a confluence portion 1301 and an inlet portion 1302 . The confluence portion 1301 is disposed inside the connecting portion 101 , and the inlet portion 1302 is disposed inside the fixing portion 102 . The confluence portion 1301 is communicated with the inlet portion 1302 .

[0033] Specifically, the inflation hole 5 includes an air outlet portion 501 and a circulation portion 502 . The air outlet portions 501 are provided in plurality and are arranged in a circular array around the central axis of the ground joint 3 . The air outlet portions 501 and the circulation portion 502 are communicated.

[0034] In this embodiment, the air outlet part 501 is arranged in a circumferential array, which is beneficial to the dispersed flow of gas and is beneficial to reducing the air pressure inside the joint. Then it enters the inlet part 1302 and finally flows out through the confluence part 1301.

[0035] Specifically, an installation ear 10 is fixedly connected to the surface of the fixing part 102. The installation ear 10 is fixedly connected to the arrow upper joint 1. The surface of the installation ear 10 is movably connected to the surface of the arrow upper panel 6. The fixing part 102 movably penetrates through the arrow upper panel 6. The installation ear 10 is fixed to the arrow upper panel 6 by an internal hexagonal bolt 8.

[0036] In this embodiment, the arrow upper joint 1 can be fixed to the arrow upper panel 6 through the installation ear 10 and the internal hexagonal bolt 8 to prevent it from falling off.

[0037] Specifically, a spring 2 is arranged inside the fixing part 102. One end of the spring 2 is movably connected to the top of the inner side wall of the fixing part 102, and the other end of the spring 2 is movably connected to the top of the ground joint 3.

[0038] Specifically, the clamping structure includes a fixing boss 11. The fixing boss 11 is fixedly connected to the ground joint 3. A fixing hole 12 is formed on the surface of the ground panel 7. A fixing groove 14 is formed on the inner side wall of the fixing hole 12. The surface of the fixing boss 11 is movably connected to the inner side wall of the fixing groove 14.

[0039] A retaining ring groove 15 is formed on the surface of the ground joint 3. An axial elastic energy storage sealing ring 9 is installed inside the retaining ring groove 15. The surface of the axial elastic energy storage sealing ring 9 is movably connected to the surface of the ground panel 7.

[0040] In this embodiment, the fixing boss 11 on the ground joint 3 passes through the fixing hole 12 on the ground panel 7 and rotates clockwise into the fixing groove 14. Elastic force is applied by the spring 2 to make it fit tightly with the fixing groove 14. The axial elastic energy storage sealing ring 9 is used to clamp tightly to prevent the ground joint 3 from falling off.

[0041] Specifically, the sealing component includes two sealing grooves 16. The two sealing grooves 16 are respectively located above and below the inflation hole 5. Sealing rings 17 are installed inside the two sealing grooves 16. The surfaces of the two sealing rings 17 are movably connected to the inner side wall of the fixing part 102.

[0042] In this embodiment, sealing can be achieved through the two sealing rings 17, enabling the gas to flow out through the air outlet part 501 and enter the inlet part 1302, and then flow out through the confluence part 1301, effectively preventing leakage.

[0043] During use, insert the upper arrow connector 1 onto the upper arrow panel 6 so that the mounting ear 10 aligns with the reserved hole on the upper arrow panel 6. Then, use the hexagon socket head bolt 8 to fix the mounting ear 10 to the upper arrow panel 6, thereby fixing the upper arrow connector 1. The ground connector 3 is fixedly connected with a fixing boss 11. During installation, insert the fixing boss 11 into the fixing groove 14, and then rotate the ground connector 3 so that the fixing boss 11 is snap-fitted inside the fixing groove 14. At this time, the ground connector 3 passes through the fixing hole 12 on the surface of the ground panel 7.

[0044] In addition, a snap ring groove 15 is formed on the ground connector 3, and an axially elastic energy storage sealing ring 9 is installed inside the snap ring groove 15. After the ground connector 3 passes through the fixing hole 12 on the surface of the ground panel 7, the axially elastic energy storage sealing ring 9 is located below the ground panel 7 and contacts the ground panel 7 to achieve sealing, axial clamping, and prevent the ground connector 3 from falling off.

[0045] The upper arrow connector 1 includes a connecting portion 101 and a fixing portion 102. The connecting portion 101 and the fixing portion 102 are processed separately and then welded together. The air supply hole 13 includes a confluence portion 1301 and an inlet portion 1302. The confluence portion 1301 is arranged inside the connecting portion 101, and the inlet portion 1302 is arranged inside the fixing portion 102. The confluence portion 1301 is communicated with the inlet portion 1302. The inflation hole 5 includes an air outlet portion 501 and a circulation portion 502. Multiple air outlet portions 501 are provided and arranged in a circumferential array around the central axis of the ground connector 3. The air outlet portion 501 is communicated with the circulation portion 502. The upper arrow connector 1 is inserted into the inside of the inlet portion 1302 and contacts the spring 2. Under the action of the spring 2, the fixing boss 11 presses against the fixing groove 14 tightly. A ventilation hole 4 is also formed on the upper arrow connector 1 to prevent a vacuum from being formed at the position of the spring 2 when the ground connector 3 is inserted, causing the ground connector 3 to be unable to be inserted.

[0046] The two sealing grooves 16 are respectively located at the upper and lower parts of the inflation hole 5, and sealing rings 17 are installed inside the two sealing grooves 16. The surfaces of the two sealing rings 17 are movably connected to the inner side wall of the fixing portion 102, and the sealing rings 17 can prevent gas leakage.

[0047] Breaking away from the traditional threaded fixed connection form of the air supply connector, the ground part of the air path connector is frequently disassembled. A structure with a boss at one end and an axially elastic snap ring at the other end is adopted to fix to the ground panel. The joints and the panel are all in clearance fit, reducing the machining accuracy of the panel. With a balanced pressure design, no reverse pressure will be exerted on the panel during the high and low pressure gas transmission process, greatly reducing the load requirement on the arrow ground panel, reducing the panel thickness, and reducing the panel weight.

[0048] It should be noted that in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0049] The preferred embodiments of the present invention disclosed above are only used to assist in the description of the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A stainless-steel rocket gas supply balanced pressure joint, comprising an upper rocket panel (6) and a ground panel (7), characterized in that: An arrow upper joint (1) is mounted on the surface of the arrow upper panel (6), a ground joint (3) is mounted on the ground panel (7), and the ground joint (3) is inserted into the interior of the arrow upper joint (1). An air supply hole (13) is formed in the arrow upper joint (1), an inflation hole (5) is formed in the ground joint (3), a sealing member for sealing is provided on the ground joint (3), and a clamping structure for mounting the ground joint (3) on the ground panel (7) is further provided on the ground joint (3). A ventilation hole (4) is further formed in the arrow upper joint (1). The arrow upper joint (1) includes a connecting portion (101) and a fixing portion (102), the connecting portion (101) and the fixing portion (102) are fixedly welded together, the ventilation hole (4) is formed in the surface of the fixing portion (102), and the ground joint (3) is inserted into the interior of the fixing portion (102). Among them, the fixing portion (102) includes an inner blind hole and an outer fluid circulation portion, a spring (2) is arranged inside the inner blind hole, one end of the spring (2) is movably connected to the top of the inner side wall of the inner blind hole, and the other end of the spring (2) is movably connected to the top of the ground joint (3). When the ground joint (3) is inserted into the inner blind hole, the ventilation hole (4) prevents a vacuum from being formed at the position of the spring (2), causing the ground joint (3) to be unable to be inserted. The limited flow area of the air supply hole (13) on the arrow upper joint (1) is larger than the effective flow area of the balance joint, and the limited flow area of the inflation hole (5) on the ground joint (3) is larger than the effective flow area of the balance joint. The air supply hole (13) includes a confluence portion (1301) and an inlet portion (1302), the confluence portion (1301) is arranged inside the connecting portion (101), the inlet portion (1302) is arranged inside the fixing portion (102), and the confluence portion (1301) is communicated with the inlet portion (1302). The inflation hole (5) includes an air outlet portion (501) and a circulation portion (502), a plurality of air outlet portions (501) are provided and are circumferentially and uniformly arranged around the central axis of the ground joint (3), and the air outlet portion (501) is communicated with the circulation portion (502); the top end of the ground joint (3) is inserted into the inner blind hole, and the air flow sequentially passes through the circulation portion (502) and the air outlet portion (501), enters the outer fluid circulation portion, and then flows out through the inlet portion (1302) and the confluence portion (1301). An installation ear (10) is fixedly connected to the surface of the fixing portion (102), the installation ear (10) is fixedly connected to the arrow upper joint (1), the surface of the installation ear (10) is movably connected to the surface of the arrow upper panel (6), the fixing portion (102) movably penetrates through the arrow upper panel (6), and the installation ear (10) is fixed to the arrow upper panel (6) by an inner hexagon bolt (8). The sealing member includes two sealing grooves (16), the two sealing grooves (16) are respectively located at the upper and lower parts of the air outlet part (501), sealing rings (17) are installed inside the two sealing grooves (16), the surface of the upper sealing ring (17) is movably connected with the inner blind hole of the fixing part (102), and the surface of the lower sealing ring (17) is movably connected with the inner hole wall on the lower side of the fixing part (102).

2. The one kind of stainless-steel rocket gas supply balance pressure joint according to claim 1, characterized in that: The clamping structure includes a fixing boss (11), the fixing boss (11) is fixedly connected to the ground joint (3), a fixing hole (12) is formed on the surface of the ground panel (7), a fixing groove (14) is formed on the inner side wall of the fixing hole (12), and the surface of the fixing boss (11) is movably connected with the inner side wall of the fixing groove (14); a retaining ring groove (15) is formed on the surface of the ground joint (3), an axial elastic energy storage sealing ring (9) is installed inside the retaining ring groove (15), and the surface of the axial elastic energy storage sealing ring (9) is movably connected with the surface of the ground panel (7); The fixing boss (11) on the ground joint (3) passes through the fixing hole (12) on the ground panel (7), rotates clockwise, turns into the fixing groove (14), is pressed tightly against the fixing groove (14) by the elastic force applied by the spring (2), and then is clamped tightly by the axial elastic energy storage sealing ring (9) to prevent the ground joint (3) from falling off.

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