A plate-net combined channel-type guide plate based on a waist-shaped hole structure

Abstract

The present invention relates to a plate mesh combined with a channel-type guide plate based on a waist-shaped hole structure, belonging to the technical field of aerospace propulsion equipment. It comprises a guide plate and a tank, wherein the guide plate is arranged parallel to the inner wall of the tank, and there is a gap between the guide plate and the inner wall of the tank. The two sides of the guide plate are respectively capillary porous plates and groove structures, wherein the capillary porous plates are connected to the groove structure, and a plurality of waist-shaped capillary holes are arranged in an array on the capillary porous plate. The waist-shaped capillary holes of the capillary porous plate are arranged corresponding to the grooves of the groove structure. The channel-type guide plate of the present invention has a simple and lightweight structure, high reliability, and strong stability. It is suitable for various microgravity acceleration and flow working conditions, has long-range liquid diversion capabilities and efficient gas-liquid separation performance, fully conforms to the development needs of future propulsion systems, and has broad application prospects.

Description

Technical Field

[0001] The invention relates to a channel-type guide plate based on a waist-shaped hole structure, belonging to the technical field of aerospace propulsion equipment. Background Art

[0002] The surface tension tank is an important component of the satellite propellant system and plays an important role in promoting the development of aerospace technology. The surface tension tank mainly realizes gas-liquid separation through the propellant management device (PMD). In a microgravity environment, the surface tension principle of liquid is used to transport the liquid propellant without air to the outlet under certain acceleration and flow conditions, while ensuring that all the liquid in the tank is emptied. At present, surface tension tanks are mainly divided into two categories: mesh surface tension tanks and plate surface tension tanks. Among them, the mesh tank manages the fluid through the liquid retention capacity of the capillary mesh, which can meet various microgravity acceleration and flow requirements, but the screen structure has high processing cost, low reliability, and the PMD mass is relatively large. For example: The publication number is CN118417692A, and the invention is named a laser welding method for heterogeneous material channel components of a surface tension tank, and its technical solution discloses Figure 2-3 , which has good flow conduction energy, but weak gas-liquid separation ability.

[0003] Existing mesh and plate-type propellant management systems each have their advantages and disadvantages. Future propulsion systems will need to adapt to high reverse acceleration environments and possess high-flow refueling capabilities. This requires surface tension tanks to be able to operate under these conditions while maintaining operational reliability and stability. Therefore, by integrating the advantages and disadvantages of both existing tank types, developing a new generation of suitable plate-mesh combined propellant management systems has become a new trend in the future development of surface tension tanks.

[0004] Therefore, it is urgent to propose a plate mesh combined with a channel-type guide plate based on a waist-shaped hole structure to solve the above technical problems. Summary of the Invention

[0005] To address the aforementioned issues, a channel-type flow guide plate with a plate-net structure and a waist-shaped hole structure is provided. A brief overview of the invention is provided below to provide a basic understanding of certain aspects of the invention. It should be understood that this overview is not an exhaustive overview of the invention. It is not intended to identify key or important aspects of the invention, nor is it intended to limit the scope of the invention.

[0006] The technical solution of the present invention:

[0007] A plate-net combined channel-type guide plate based on a waist-shaped hole structure includes a guide plate and a storage tank. The guide plate is arranged parallel to the inner wall of the storage tank, and there is a gap between the guide plate and the inner wall of the storage tank. The two sides of the guide plate are respectively provided with a capillary porous plate and a groove structure. The capillary porous plate is connected to the groove structure. A plurality of waist-shaped capillary holes are arranged in an array on the capillary porous plate. The waist-shaped capillary holes of the capillary porous plate are arranged corresponding to the grooves of the groove structure.

[0008] Preferably, the groove of the groove structure is a "U"-shaped groove, and the width of the groove of the groove structure is 2 to 6 mm.

[0009] Preferably, the waist-shaped capillary pores of the capillary porous plate are waist-shaped through holes.

[0010] Preferably, the capillary porous plate is processed with a plurality of evenly arranged waist-shaped capillary holes by double-sided laser drilling.

[0011] Preferably, the diameter of the waist-shaped capillary pores is 0.01 mm to 0.1 mm, and the axial length of the waist-shaped capillary pores is consistent with the thickness of the capillary porous plate.

[0012] Preferably, the guide plate extends from the bottom end of the storage tank to the liquid outlet at the top end of the storage tank.

[0013] Preferably, the number of the guide plates is four, and the guide plates are evenly arranged along the circumferential direction in the tank.

[0014] Preferably, both ends of the guide plate are arc-shaped, and the capillary porous plate and the groove structure are corresponding arc-shaped.

[0015] Preferably, the channel-type guide plate has a capillary porous plate structure on the side close to the tank wall.

[0016] Preferably: a plate mesh combined with a channel-type guide plate based on a waist-shaped hole structure provides a closed flow path for the propellant liquid and can be used in conjunction with a propellant management device such as a liquid accumulator and a gas-liquid separator.

[0017] The present invention has the following beneficial effects:

[0018] 1. The channel-type guide plate of the present invention adopts a brand-new plate-net combined structure, which can integrate the characteristics of the existing net-type PMD and plate-type PMD, eliminate the inferior and retain the superior, and adapt to the development of the new generation of surface tension tank propellant management devices.

[0019] 2. The channel-type guide plate of the present invention has a simple and lightweight structure, high reliability, strong stability, and excellent gas-liquid separation effect. It is suitable for various microgravity acceleration and flow working conditions, fully conforms to the development needs of future propulsion systems, and has broad application prospects.

[0020] 3. The channel-type guide plate of the present invention can be used in conjunction with propellant management devices such as liquid accumulators and gas-liquid separators, and can be adaptively modified according to the structural dimensions of the surface tension tank. It can achieve full management of the propellant liquid in the tank, and has long-range liquid diversion capabilities and efficient gas-liquid separation performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of assembling a channel-type guide plate with a waist-shaped hole structure in a surface tension tank according to the present invention;

[0022] Figure 2 This is a schematic diagram of a channel-type guide plate combined with a plate mesh based on a waist-shaped hole structure according to the present invention;

[0023] Figure 3 for Figure 2 AA view and partial enlarged view of the waist-shaped hole;

[0024] Figure 4 Schematic diagram of gas-liquid two-phase distribution on both sides of the capillary porous plate of the present invention;

[0025] Figure 5 for Figure 2 Partial view in the B direction.

[0026] In the figure, 1-guide plate, 2-storage box, 3-waist-shaped capillary pores, 1a-capillary porous plate, 1b-groove structure. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions, and advantages of the present invention more clearly apparent, the present invention is described below using specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present invention.

[0028] Specific implementation method 1: Combination Figure 1-5 This embodiment describes a plate mesh combined with a channel-type guide plate based on a waist-shaped hole structure, comprising a guide plate 1 and a tank 2. The guide plate 1 is a channel-type structure. The guide plate 1 is arranged parallel to the inner wall of the tank 2. There is a gap between the guide plate 1 and the inner wall of the tank 2. The propellant liquid can flow along the gap under the action of surface tension. The two sides of the guide plate 1 are respectively a capillary porous plate 1a and a groove structure 1b. The capillary porous plate 1a is connected to the groove structure 1b (as shown in FIG. Figure 5 As shown) a plurality of waist-shaped capillary holes 3 are evenly arranged on the capillary porous plate 1a, and the waist-shaped capillary holes 3 of the capillary porous plate 1a correspond to the grooves of the groove structure 1b to form channels;

[0029] The channel-type guide plate 1 has a U-shaped groove structure 1b on the side away from the wall of the tank 2. The groove of the groove structure 1b is a U-shaped groove with a width of 2 to 6 mm. The cross-section of the internal channel of the channel-type guide plate 1 is rectangular. The groove structure 1b is welded to the capillary porous plate 1a, ensuring the structural strength of the channel-type guide plate and providing a closed channel for the flow of the propellant liquid. In a microgravity environment, the propellant can be driven to flow toward the liquid outlet based on the surface tension of the liquid, ensuring sufficient transmission speed.

[0030] The waist-shaped capillary pores 3 of the capillary porous plate 1a are waist-shaped through holes, that is, (e.g. Figure 3-4 The sidewalls of the waist-shaped through hole are arc-shaped, the apertures at both ends of the axial direction are larger than the apertures in the middle, the waist-shaped capillary pores 3 are thin in the middle and thick on both sides, and the cross sections are all circular;

[0031] The capillary porous plate 1a is processed with a plurality of waist-shaped capillary holes 3 arranged in a linear array by double-sided laser drilling;

[0032] The pore diameter of the waist-shaped capillary pores 3 is in the range of 0.01 mm to 0.1 mm, which can provide a large bubble bursting point pressure, effectively preventing the gas in the storage tank 2 from passing through the capillary porous plate 1a and entering the channel-type guide plate 1 to mix with the propellant liquid. The axial length of the waist-shaped capillary pores 3 is consistent with the thickness of the capillary porous plate 1a.

[0033] The guide plate 1 extends from the bottom end of the tank 2 to the liquid outlet at the top end of the tank 2, and has a long-range liquid diversion capability;

[0034] like Figure 2 As shown, there are four guide plates 1, which are evenly arranged along the circumference of the tank 2. The angle between adjacent guide plates is 90°, ensuring that at least one guide plate is submerged in the propellant liquid when the north-south position and the east-west position are maintained.

[0035] The two ends of the guide plate 1 are arc-shaped, and the capillary porous plate 1a and the groove structure 1b are correspondingly arc-shaped, that is, the shape of the guide plate 1 is set corresponding to the shape of the inner wall of the storage tank 2;

[0036] The side of the channel-type guide plate 1 close to the tank wall is a capillary porous plate 1a structure; in a microgravity environment, the propellant liquid can pass through the capillary porous plate 1a into the channel of the channel-type guide plate 1, and flow along the channel-type guide plate 1 to the liquid outlet of the tank 2 under the driving action of surface tension, providing the propulsion system with air-free propellant liquid, thereby realizing full management of the propellant liquid in the surface tension tank.

[0037] A channel-type flow guide plate with a plate-net structure and kidney-shaped holes is used in conjunction with propellant management devices such as liquid accumulators and gas-liquid separators. The channel-type flow guide plate is particularly suitable for managing propellant in surface tension tanks under microgravity. The capillary porous plate is laser-drilled on both sides to form multiple micron-sized kidney-shaped capillary holes. These holes have a high bubble burst pressure, retaining the propellant liquid while also acting as a gas barrier, achieving excellent gas-liquid separation. This channel-type flow guide plate combines the advantages of both mesh-type and plate-type propellant management devices. It is not only simple and lightweight, but also highly safe and reliable. It can also adapt to various high-flow and high-acceleration operating environments, meeting the development needs of next-generation satellite propulsion systems and possessing broad application prospects.

[0038] Example 1:

[0039] Combine Figure 1-5 A channel-type guide plate with a plate-net structure and a waist-shaped hole structure. The guide plate 1 is a channel-type structure, and the side close to the wall of the tank 2 is a capillary porous plate 1a structure. In a microgravity environment, the propellant liquid can pass through the capillary porous plate 1a into the channel-type guide plate 1 and flow along the channel-type guide plate 1 to the liquid outlet of the tank 2 under the action of surface tension. This provides the propulsion system with air-free propellant liquid and realizes the full management of the propellant liquid in the surface tension tank.

[0040] In this embodiment, the channel-type guide plate 1 is arranged parallel to the inner wall of the tank 2. Figure 1 As shown, it extends from the bottom end of the storage tank 2 to the top liquid outlet, and has long-range liquid diversion capabilities;

[0041] In this embodiment, there are four channel-type guide plates 1, which are evenly arranged along the circumference in the tank 2. Figure 2 As shown, the angle between adjacent guide plates is 90°, which ensures that at least one guide plate is submerged in the propellant liquid when maintaining the north-south position and the east-west position;

[0042] In this embodiment, the side of the channel-type guide plate 1 away from the wall of the tank 2 is a "U"-shaped groove structure 1b, such as Figure 3 As shown, the groove structure 1b is welded to the capillary porous plate 1a, which ensures the structural strength of the channel-type guide plate and provides a closed flow channel for the flow of the propellant liquid;

[0043] In this embodiment, the capillary porous plate 1a and the groove structure 1b are made of stainless steel or titanium alloy, and both are 1 mm thick.

[0044] In this embodiment, the cross section of the internal channel of the channel-type guide plate 1 is rectangular, with a length ranging from 20 to 80 mm and a width ranging from 2 to 6 mm. In a microgravity environment, the gap in the channel can drive the liquid propellant to flow toward the liquid outlet under the action of surface tension, ensuring sufficient transmission speed;

[0045] In this embodiment, the capillary porous plate 1a is provided with a plurality of waist-shaped capillary through holes 3 by laser drilling on both sides, and the apertures of the waist-shaped through holes are all in the micrometer level;

[0046] In this embodiment, the capillary porous plate 1a not only retains the propellant liquid but also acts as a gas barrier, preventing gas inhalation at a specific liquid level or pressure, which is also known as the bubble burst point;

[0047] In this embodiment, the diameter of the waist-shaped capillary pores 3 is in the range of 0.01 mm to 0.1 mm, which can provide a large bubble bursting point pressure, effectively preventing the gas in the tank 2 from passing through the capillary porous plate 1a and entering the channel-type guide plate 1 to mix with the propellant liquid;

[0048] In this embodiment, the waist-shaped capillary pores 3 are thin in the middle and thick on both sides, and their cross sections are all circular. Figure 3 As shown, the pore diameters are defined as D1 and D2, respectively, and D1>D2. According to the Young-Laplace equation, the formula for calculating the bubble bursting point pressure of cylindrical small holes shows that, when the surface tension and contact angle of the propellant liquid are known, the bubble bursting point pressure of the cylindrical through hole is directly related to the pore size. The bubble bursting point pressure of the waist-shaped capillary pore 3 of the present invention is much greater than the bubble bursting point pressure of the cylindrical through hole corresponding to the maximum pore diameter D1, that is, compared with the cylindrical capillary pore with the same pore diameter D1, it has a stronger gas-liquid separation ability.

[0049] In this embodiment, the bubble bursting point pressure of the waist-shaped capillary pore 3 is related to the pore diameter D2, and the smaller the D2 value is, the greater the bubble bursting point pressure of the waist-shaped capillary pore 3 is.

[0050] In this embodiment, if Figure 4 As shown, when the pressure difference p1-p2 on both sides of the capillary porous plate 1a is less than the bubble bursting point pressure of the waist-shaped capillary pores 3, the gas outside the capillary porous plate 1a will not be able to pass through the capillary pores into the channel-type flow guide 1; in a steady state, the propellant liquid 4 will form a bubble inside the capillary porous plate 1a. Figure 4 The curved phase interface 5 is shown;

[0051] In this embodiment, the length of the waist-shaped capillary pores 3 is consistent with the thickness of the capillary porous plate 1a, which is 1 mm.

[0052] In this embodiment, the waist-shaped capillary pores 3 are evenly arranged on the capillary porous plate 1a. Figure 5 As shown, the circumferential and axial distances between the centers of the small holes are defined as L h With L v , and L h =L v , the parameter value is related to the aperture of the waist-shaped capillary pore 3, which is about 2D1~4D1, ensuring that the capillary porous plate 1a provides sufficient flow area for the propellant while having sufficient structural strength;

[0053] In this embodiment, a certain gap is provided between the channel-type guide plate 1 and the inner wall of the tank 2, with a gap distance of 2 to 8 mm, to prevent liquid blockage caused by a gap that is too small and to ensure that the propellant liquid can climb along the gap under the action of surface tension and smoothly pass through the capillary porous plate 1a into the channel-type guide plate 1;

[0054] In this embodiment, the channel-type guide plate 1 can be used in conjunction with a propellant management device such as a liquid accumulator and a gas-liquid separator, and is easy to connect to achieve a better gas-liquid separation effect;

[0055] The channel-type guide plate based on the waist-shaped hole plate structure in the present invention combines the advantages of the mesh PMD and the plate PMD. It not only retains the advantages of the simple and light structure, high safety and reliability of the guide plate, but also can adapt to various large flow and large acceleration working environments, and conform to the development of future satellite propulsion systems.

[0056] It should be noted that in the above embodiments, as long as the technical solutions are not contradictory, they can be permuted and combined. Those skilled in the art can exhaust all possibilities based on the mathematical knowledge of permutations and combinations. Therefore, the present invention will no longer describe the technical solutions after permutations and combinations one by one, but it should be understood that the technical solutions after permutations and combinations have been disclosed by the present invention.

[0057] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A channel-type guide plate with a plate mesh structure based on a waist-shaped hole structure, comprising a guide plate (1) and a storage tank (2), wherein the guide plate (1) and the inner wall of the storage tank (2) are arranged parallel to each other, and a gap is formed between the guide plate (1) and the storage tank (2), and characterized in that: The guide plate (1) has a capillary porous plate (1a) and a groove structure (1b) on both sides, the capillary porous plate (1a) is connected to the groove structure (1b), a plurality of waist-shaped capillary holes (3) are evenly arranged on the capillary porous plate (1a), and the waist-shaped capillary holes (3) of the capillary porous plate (1a) are arranged corresponding to the grooves of the groove structure (1b); The groove of the groove structure (1b) is a "U"-shaped groove; The waist-shaped capillary pores (3) of the capillary porous plate (1a) are waist-shaped through holes; The axial length of the waist-shaped capillary pore (3) is consistent with the thickness of the capillary porous plate (1a).

2. The channel-type guide plate with a plate-net structure based on a waist-shaped hole structure according to claim 1, characterized in that: The width of the groove of the groove structure (1b) is 2~6mm.

3. The plate-net combined channel-type guide plate based on the waist-shaped hole structure according to claim 2, characterized in that: The capillary porous plate (1a) is processed with a plurality of waist-shaped capillary holes (3) arranged in a linear array by double-sided laser drilling.

4. The channel-type guide plate with a plate-net structure and a waist-shaped hole structure according to claim 3, characterized in that: The diameter of the waist-shaped capillary pores (3) is between 0.01 mm and 0.1 mm.

5. The channel-type guide plate with a plate-net structure and a waist-shaped hole structure according to claim 1, characterized in that: The guide plate (1) extends from the bottom end of the storage tank (2) to the liquid outlet at the top end of the storage tank (2).

6. The channel-type guide plate with a plate-net structure based on a waist-shaped hole structure according to claim 5, characterized in that: The number of the guide plates (1) is four, and the guide plates (1) are evenly arranged along the circumferential direction inside the storage tank (2).

7. A channel-type guide plate with a plate-net structure and a waist-shaped hole structure according to claim 1, 5 or 6, characterized in that: Both ends of the guide plate (1) are arc-shaped, and the capillary porous plate (1a) and the groove structure (1b) are corresponding arc-shaped.

8. The plate-net combined channel-type guide plate based on a waist-shaped hole structure according to claim 7, characterized in that: The channel-type guide plate (1) has a capillary porous plate (1a) structure on the side close to the tank wall.

9. The plate-net combined channel-type guide plate based on a waist-shaped hole structure according to claim 7, characterized in that: A plate mesh combined with a channel-type guide plate based on a waist-shaped hole structure is a channel-type structure, which provides a closed flow path for the propellant liquid and can be used in conjunction with a liquid accumulator and a gas-liquid separator propellant management device.

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