Extra-large annular integrated propellant management device

Abstract

The present invention provides an oversized annular integrated propellant management device, comprising a channel assembly, a channel connecting pipe, and a liquid outlet pipe; a plurality of channel assemblies are sequentially connected end to end through a plurality of channel connecting pipes to form an annular shape, and the liquid outlet pipe is arranged on one of the channel connecting pipes; the channel assembly comprises an inner screen assembly and an outer screen assembly, a management cavity is formed between the inner screen assembly and the outer screen assembly, the bubble bursting point value of the inner screen assembly is greater than the bubble bursting point value of the outer screen assembly; the channel connecting pipe is connected to the management cavity. The present invention is integrated and easy to test through a multi-section channel assembly; the channel compensation pipe is used for connection, and the shell deformation can be compensated by tensile or compression characteristics, thereby protecting the propellant management device from damage; by using an inner screen assembly and an outer screen assembly inside the channel assembly, the propellant output to the downstream is guaranteed to be in a non-air-entrained state, thereby increasing the working reliability of the management device.

Description

Technical Field

[0001] The present invention relates to the field of aerospace technology, and in particular to an oversized annular integrated propellant management device. Background Art

[0002] Surface tension tanks utilize the surface tension of liquids to manage propellant. Due to their lack of moving parts, they offer high reliability, long life, and low weight, making them the preferred solution for liquid propulsion systems. The core technology of surface tension tanks is their internal propellant management device (PMD), which manages propellant in microgravity environments. The PMD is designed to deliver propellant reliably and air-free downstream at all stages of operation.

[0003] The existing Chinese patent publication number CN103133862A discloses a load-bearing surface tension tank, including a connected shell and a propellant management device. The shell includes an upper shell 4, a lower shell 7, an upper flange 1, and a lower flange 10; the propellant management device includes an air port 2, a liquid passage 3 with a tube, a load-bearing cylinder 5, a guide tube 6, a pressure ring 8, a mesh 9, a liquid port 11, an air trap shell 12, an air trap cover 13 and a liquid passage 14. The liquid port 11, air trap shell 12, air trap cover 13, mesh 9 and pressure ring 8 constitute a bubble trap device arranged at the bottom of the lower shell 7.

[0004] Surface tension tanks mainly have mesh structures and plate structures. At present, the maximum volume of domestic mesh surface tension tanks does not exceed 2000L, the discharge flow rate is not more than 200ml / s, and the tank structure is spherical or spherical. The internal PMD is a conformal design, including semi-managed PMD and fully managed PMD. The structure is relatively regular. Moreover, with the development over the past few decades, the design inheritance of PMD has become higher and higher, and the technology has become more and more mature.

[0005] In recent years, with the rapid development of applications in satellites, ships, and instruments, the demand for surface tension tanks has become increasingly higher. For example, the tank volume is required to be larger and larger, reaching more than 5000L; the discharge flow rate is required to be larger and larger, reaching more than 5L / s; at the same time, the structure is becoming more and more irregular, such as the ellipsoidal common bottom tank.

[0006] The above requirements have brought a series of challenges to the structural design of the surface tension tank PMD. For example, in order to meet the needs of large-volume and irregular tanks, the PMD must be designed to match the strength and deformation of the shell. In order to meet the large flow requirements of large-volume tanks, a large-area screen structure must be arranged to adapt to the flow and flow resistance matching of the tank. In addition, due to its large size, performance testing becomes more difficult.

[0007] Therefore, in order to meet the performance requirements of the ultra-large volume ellipsoidal common bottom tank, it is necessary to provide a propellant management device that can adapt to the pressure deformation capacity of the ultra-large volume tank, meet the ultra-large flow rate propellant discharge, be integrated, and have the advantages of simple performance testing. Summary of the Invention

[0008] In view of the defects in the prior art, the purpose of the present invention is to provide an extra-large-sized annular integrated propellant management device.

[0009] According to the present invention, an extra-large annular integrated propellant management device is provided, comprising: a channel assembly, a channel connecting tube, and a liquid outlet pipe; a plurality of the channel assemblies are sequentially connected end to end through a plurality of the channel connecting tubes to form a ring, and the liquid outlet pipe is arranged on one of the channel connecting tubes; the channel assembly includes an inner screen assembly and an outer screen assembly, a management cavity is formed between the inner screen assembly and the outer screen assembly, the bubble bursting point value of the inner screen assembly is greater than the bubble bursting point value of the outer screen assembly; the channel connecting tube is connected to the management cavity.

[0010] Preferably, the number of the channel assemblies is between 4 and 12.

[0011] Preferably, the liquid outlet pipes that are not provided with the channel connecting pipes are all elastic channel compensating pipes, and the connection between the channel assembly and the channel compensating pipes is provided with a channel adapter ring.

[0012] Preferably, the liquid outlet pipe is connected to a liquid port, and the liquid outlet pipe is connected to the liquid port via a liquid port compensation pipe.

[0013] Preferably, the channel assembly further comprises a channel skeleton and a sealing plate assembly, and the outer screen assembly, the channel skeleton and the sealing plate assembly cooperate to form an outer cavity.

[0014] Preferably, the outer screen assembly includes an outer through assembly, the inner screen assembly includes an inner through assembly, and the outer through assembly and the inner through assembly are respectively fastened to the channel skeleton.

[0015] Preferably, the distance that the outer passage component protrudes from one side of the channel skeleton is not less than 20 mm, and the distance that the inner passage component protrudes from one side of the channel skeleton is 60 mm.

[0016] Preferably, the outer screen assembly further includes an air window assembly, the sealing plate assembly includes an upper sealing plate assembly, and a plurality of the air window assemblies are symmetrically arranged on the upper sealing plate assembly.

[0017] Preferably, the upper sealing plate assembly includes an upper sealing plate, the upper sealing plate is an arched structure, the height difference of the arch is 4 to 10 mm, the highest point of the arch is a plane structure, the width of the plane is 20 to 40 mm, and 1 to 4 air window assemblies are arranged on the plane.

[0018] Preferably, the inner screen assembly further comprises a bottom collection assembly, both ends of which are respectively connected to the inner passage assembly and the upper sealing plate assembly, and a plurality of the bottom collection assemblies are provided on the channel assembly.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention uses a multi-section channel assembly to conduct individual performance tests on each section of the channel assembly, which is integrated and simple to test. Through the channel compensation tube connection, shell deformation can be compensated through tension or compression characteristics to protect the propellant management device from damage. By using an inner screen assembly and an outer screen assembly inside the channel assembly, the propellant output to the downstream is guaranteed to be free of air, thereby increasing the working reliability of the management device.

[0021] 2. The present invention can reduce the flow rate per unit screen area under large flow conditions by rationally arranging the screen structure and increasing the screen area, so as to appropriately match the tank discharge flow and flow resistance to meet the requirements of ultra-large flow propellant discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0023] Figure 1 This is a top view of the super-large annular integrated propellant management device that mainly embodies the present invention;

[0024] Figure 2 This is a cross-sectional view of the entirety of the large-scale annular integrated propellant management device, which is a primary embodiment of the present invention. The left channel assembly is a view of the internal structure of the cavity with a portion of the outer screen assembly cut away, while the right channel assembly is not cut away.

[0025] Figure 3 This is a top view of the channel assembly that mainly embodies the present invention;

[0026] Figure 4 The present invention mainly embodies Figure 3 A-direction cross-section;

[0027] Figure 5 This is a cross-sectional view of the top net component of the present invention;

[0028] Figure 6This is a cross-sectional view of the top net component in the direction of B, which mainly embodies the present invention;

[0029] Figure 7 This is a cross-sectional view of the side screen assembly that is mainly embodied in the present invention;

[0030] Figure 8 This is a cross-sectional view of the side net assembly in the direction B, which mainly embodies the present invention;

[0031] Figure 9 This is an axial cross-sectional view of the air window assembly that mainly embodies the present invention;

[0032] Figure 10 The present invention mainly embodies Figure 3 Middle B-direction cross-section;

[0033] Figure 11 The present invention mainly embodies Figure 3 Middle C-direction cross-section;

[0034] Figure 12 This is a top view of the bottom collection screen that mainly embodies the present invention.

[0035] As shown in the figure:

[0036] Channel assembly 1 Channel compensation tube 2 Channel adapter ring 3

[0037] Channel connecting pipe 4 liquid outlet pipe 5 liquid port compensation pipe 6

[0038] Liquid port 7 external connection component 11 internal connection component 12

[0039] Air louver assembly 13 channel frame 14 upper sealing plate assembly 15

[0040] The bottom receiving assembly 16 and the side sealing plate 17 are connected to the frame 111

[0041] External mesh 112 External pressure plate 113 Top mesh assembly 121

[0042] Side net assembly 122 air louver frame 131 air louver mesh 132

[0043] The air window pressure plate 133 is connected to the support ear 151 and the upper sealing plate 152

[0044] Bottom collection screen 161 bottom collection tube 162 fixing nut 163

[0045] Positioning column 164 top net pressure plate 1211 top net 1212

[0046] Top net lower pressure plate 1213 side net frame 1221 side net 1222

[0047] Side net pressing plate 1223 bottom frame 1611 bottom net 1612

[0048] Bottom pressure plate 1613 DETAILED DESCRIPTION

[0049] The present invention will be described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those skilled in the art, several changes and improvements can be made without departing from the scope of the present invention. These all fall within the scope of protection of the present invention.

[0050] like Figure 1 As shown, an extra-large-sized annular integrated propellant management device provided according to the present invention includes: a channel assembly 1, a channel connecting pipe 4 and a liquid outlet pipe 5; multiple channel assemblies 1 are connected end to end in sequence through multiple channel connecting pipes 4 to form a ring, and the liquid outlet pipe 5 is arranged on one of the channel connecting pipes 4; the channel assembly 1 includes an inner screen assembly and an outer screen assembly, and a management cavity is formed between the inner screen assembly and the outer screen assembly, and the bubble rupture point value of the inner screen assembly is greater than the bubble rupture point value of the outer screen assembly; the channel connecting pipe 4 is connected to the management cavity.

[0051] The channel assembly 1 includes an inner screen assembly and an outer screen assembly. The cavity volume formed between the inner screen assembly and the outer screen assembly is the management volume of the management device. The inner screen assembly and the outer screen assembly have different bubble bursting point values, wherein the bubble bursting point value of the inner screen assembly is greater than the bubble bursting point value of the outer screen assembly. During the working process, the engine first consumes the propellant in the cavity. The inner screen assembly ensures that the propellant output downstream is in a non-air-entrained state. As the cavity is consumed, the propellant outside the cavity is continuously replenished through the outer screen assembly. The function of the outer screen assembly is that as long as the outer screen assembly is in contact with the propellant, the propellant entering the management cavity will be in a non-air-entrained state. The reason why the bubble rupture point value of the inner screen assembly is greater than the bubble rupture point value of the outer screen assembly is that if the inner screen assembly and the outer screen assembly cannot work in contact with the propellant at the same time, the outer screen assembly is ensured to burst and intake air first, and the inner screen assembly is burst and intake air later, thereby increasing the working reliability of the management device.

[0052] The present application divides the entire device into multiple integrated channel assemblies 1, and the number of channel assemblies 1 is between 4 and 12. The liquid outlet pipes 5 that are not provided with channel connecting pipes 4 are all elastic channel compensation tubes 2, and the connection between the channel assembly 1 and the channel compensation tube 2 is provided with a channel adapter ring 3. The liquid outlet pipe 5 is connected to the liquid port 7, and the liquid outlet pipe 5 and the liquid port 7 are connected through the liquid port compensation tube 6. The channel compensation tube 2 has certain tensile and compression properties. When the tank shell is compressed and deformed, the channel compensation tube 2 and the liquid port compensation tube 6 can compensate for the shell deformation through the tensile or compression characteristics, thereby protecting the propellant management device from damage. In this way, the problem of PMD being damaged due to its inability to adapt to the large deformation caused by the pressure on the tank shell can be solved.

[0053] By dividing the PMD into multiple segments, each channel assembly is appropriately sized. This allows for individual performance testing of each segment, with PMD assembly only proceeding after passing the test. This approach facilitates integration and simplifies testing. By dividing the PMD into multiple, integrated channel assemblies, each segment possesses independent, identical performance. This solution addresses the difficulty of performance testing in tanks due to the large size of the PMD.

[0054] This application takes the following data as an example. There are four channel assemblies 1, six channel adapter rings 3, and three channel compensation tubes 2. A channel adapter ring 3 is welded at both ends of any two channel assemblies 1, and a channel adapter ring 3 is welded at a corresponding position of the other two channel assemblies 1. Then, a channel compensation tube 2 is welded between the channel assemblies 1 welded with the channel adapter ring 3, and then the channel connecting tube 4 is welded between the channel assemblies 1 without the channel adapter ring 3 welded. Finally, the liquid outlet pipe 5, the liquid port compensation tube 6 and the liquid port 7 are welded in sequence, wherein the liquid port compensation tube 6 is located between the liquid outlet pipe 5 and the liquid port 7.

[0055] like Figure 2 and 3 As shown, the channel assembly 1 also includes a channel skeleton 14 and a sealing plate assembly. The outer screen assembly, the channel skeleton 14, and the sealing plate assembly cooperate to form an outer cavity. The outer screen assembly includes an outer channel assembly 11, and the inner screen assembly includes an inner channel assembly 12. The outer channel assembly 11 and the inner channel assembly 12 are respectively fastened to the channel skeleton 14. The outer screen assembly also includes an air louver assembly 13, and the sealing plate assembly includes an upper sealing plate assembly 15. Multiple air louver assemblies 13 are symmetrically arranged on the upper sealing plate assembly 15. The outer channel assembly 11 protrudes from one side of the channel skeleton 14 by no less than 20 mm, and the inner channel assembly 12 protrudes from one side of the channel skeleton 14 by 60 mm.

[0056] The channel assembly 1 is composed of an outer passage assembly 11, an inner passage assembly 12, a louver assembly 13, a channel frame 14, an upper sealing plate assembly 15, a bottom collection assembly 16, and side sealing plates 17. The outer passage assembly 11, the louver assembly 13, the channel frame 14, the upper sealing plate assembly 15, and the side sealing plates 17 constitute the outer cavity of the channel assembly 1, while the inner passage assembly 12, the channel frame 14, and the bottom collection assembly 16 constitute the inner cavity of the channel assembly 1. First, assemble the inner passage component 12 to the channel frame 14 so that the inner passage component 12 protrudes 60 mm on one side of the channel frame 14, and then connect them by welding; weld one end of the bottom collection component 16 to the inner passage component 12, and the number of bottom collection components 16 in a single channel component 1 is 2; weld one end of the upper sealing plate component 15 to the channel frame 14; weld the outer passage component 11 to the upper sealing plate component 15 and the channel frame 14; then weld the bottom collection component 16 and the upper sealing plate component 15; then weld the air window component 13 to the upper sealing plate component 15, and the number of air window components 13 in a single channel component 1 is 2; finally, weld two side sealing plates 17 to the two ends of the above assembly respectively.

[0057] like Figure 4 As shown, the external communication component 11 is composed of an external communication skeleton 111, an external communication mesh 112, and an external communication pressure plate 113. First, the external communication mesh 112 is welded to the external communication pressure plate 113, and then welded to the external communication skeleton 111 after passing the performance test; the internal communication component 12 is composed of a top mesh component 121 and a side mesh component 122, and the top mesh component 121 and the side mesh component 122 are connected by welding.

[0058] like Figure 5 and 6 As shown, the top mesh assembly 121 consists of a top mesh upper pressure plate 1211, a top mesh 1212, and a top mesh lower pressure plate 1213. First, the top mesh 1212 is welded to the top mesh upper pressure plate 1211, and then welded to the top mesh lower pressure plate 1213 after passing the performance test.

[0059] like Figure 7 and 8 As shown, the side net assembly 122 is composed of a side net frame 1221, a side net 1222, and a side net pressing plate 1223. First, the side net 1222 is welded to the side net pressing plate 1223, and then welded to the side net frame 1221 after passing the performance test.

[0060] like Figure 9 As shown, the louver assembly 13 is composed of a louver frame 131, a louver mesh 132, and a louver pressure plate 133. First, the louver mesh 132 is welded to the louver pressure plate 133, and then welded to the louver frame 131 together after passing the performance test.

[0061] The upper sealing plate assembly 15 includes an upper sealing plate 152 , which is an arched structure with a height difference of 4 to 10 mm. The highest point of the arch is a plane structure with a width of 20 to 40 mm. One to four air window assemblies 13 are arranged on the plane.

[0062] In the structure, the upper sealing plate assembly 15 is composed of connecting ears 151 and an upper sealing plate 152. The number of connecting ears 151 in a single upper sealing plate assembly 15 is 6, which are respectively welded to the upper sealing plate 152.

[0063] like Figure 10 and 11 As shown, the ends of the bottom collection assembly 16 are connected to the inner channel assembly 12 and the upper sealing plate assembly 15, respectively. Multiple bottom collection assemblies 16 are provided on the channel assembly 1. The bottom collection assembly 16 structurally consists of a bottom collection screen 161, a bottom liquid collection tube 162, a fixing nut 163, and a positioning post 164. The bottom liquid collection tube 162 is first welded to the bottom collection screen 161, and then the positioning post 164 is installed on the bottom collection screen 161. The positioning post 164 passes through the upper sealing plate 152 and is screwed in place with the fixing nut 163. The connection is then loosened by welding. The bottom collection screen 161 is 2 to 4 mm from the upper sealing plate 152.

[0064] like Figure 12 As shown, the bottom collection screen 161 is composed of a bottom collection frame 1611, a bottom collection mesh 1612, and a bottom collection pressure plate 1613. First, the bottom collection mesh 1612 is welded to the bottom collection pressure plate 1613, and then welded to the bottom collection frame 1611 after passing the performance test.

[0065] This application can reduce the flow rate per unit screen area under large flow conditions by rationally arranging the screen structure and increasing the screen area, so that the tank discharge flow and flow resistance can be properly matched. To meet the requirements of ultra-large flow propellant discharge, the single-layer screen area in the PMD screen assembly can reach 150,000 mm 2 This solves the problem of large tank discharge flow resistance or even screen damage caused by insufficient screen area under high tank flow conditions.

[0066] This application manages propellant media in microgravity environments, enabling the downstream delivery of a large flow of air-free propellant media driven by upstream gas pressure. It also accommodates the air-free supply of propellant under reverse and lateral conditions at specific flow rates. This application offers advantages such as adaptability to pressure deformation of ultra-large tank volumes, ability to discharge ultra-large propellant flows, integration, and simplified performance testing. It is suitable for use as a propellant management device for ultra-large, special-shaped tanks in aerospace products such as satellites, spacecraft, and space stations.

[0067] In the description of this application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply 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 this application.

[0068] The above describes specific embodiments of the present invention. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. The embodiments of this application and the features in the embodiments may be combined with each other in any manner unless there is a conflict.

Claims

1. An ultra-large annular integrated propellant management device, characterized in that: include: A channel assembly (1), a channel connecting pipe (4), and a liquid outlet pipe (5); The plurality of channel assemblies (1) are sequentially connected end to end through the plurality of channel connecting pipes (4) to form a ring, and the liquid outlet pipe (5) is provided on one of the channel connecting pipes (4); The channel assembly (1) comprises an inner screen assembly and an outer screen assembly, a management cavity is formed between the inner screen assembly and the outer screen assembly, and the bubble bursting point value of the inner screen assembly is greater than the bubble bursting point value of the outer screen assembly; The channel connecting pipe (4) is in communication with the management cavity; The channel assembly (1) further comprises a channel frame (14) and a sealing plate assembly, wherein the outer screen assembly, the channel frame (14) and the sealing plate assembly cooperate to form an outer cavity; The outer screen assembly includes an outer through assembly (11), and the inner screen assembly includes an inner through assembly (12). The outer through assembly (11) and the inner through assembly (12) are respectively fastened to the channel skeleton (14).

2. The super-large-sized annular integrated propellant management device according to claim 1, characterized in that: The number of the channel components (1) is between 4 and 12.

3. The super-large annular integrated propellant management device according to claim 1, characterized in that: The liquid outlet pipes (5) not provided with the channel connecting pipe (4) are all elastic channel compensation pipes (2), and the connection between the channel assembly (1) and the channel compensation pipe (2) is provided with a channel adapter ring (3).

4. The super-large annular integrated propellant management device according to claim 1, characterized in that: The liquid outlet pipe (5) is connected to a liquid port (7), and the liquid outlet pipe (5) and the liquid port (7) are connected via a liquid port compensation pipe (6).

5. The super-large annular integrated propellant management device according to claim 1, characterized in that: The outer passage component (11) protrudes from one side of the channel frame (14) by no less than 20 mm, and the inner passage component (12) protrudes from one side of the channel frame (14) by 60 mm.

6. The super-large annular integrated propellant management device according to claim 1, characterized in that: The outer screen assembly further comprises an air window assembly (13), the sealing plate assembly comprises an upper sealing plate assembly (15), and a plurality of the air window assemblies (13) are symmetrically arranged on the upper sealing plate assembly (15).

7. The super-large annular integrated propellant management device according to claim 6, characterized in that: The upper sealing plate assembly (15) comprises an upper sealing plate (152), the upper sealing plate (152) is an arched structure, the height difference of the arch is 4 to 10 mm, the highest point of the arch is a plane structure, the width of the plane is 20 to 40 mm, and 1 to 4 air window assemblies (13) are arranged on the plane.

8. The super-large annular integrated propellant management device according to claim 7, characterized in that: The inner screen assembly further comprises a bottom collecting assembly (16), the two ends of which are respectively connected to the inner passage assembly (12) and the upper sealing plate assembly (15), and a plurality of the bottom collecting assemblies (16) are provided on the channel assembly (1).

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