Plate-net combined channel type guide plate based on kidney-shaped hole structure

Abstract

The invention relates to a plate-net combined channel type guide plate based on a kidney-shaped hole structure, and belongs to the technical field of aerospace propulsion equipment. Comprising a flow guide plate and a storage box, the flow guide plate is parallel to the inner wall face of the storage box, a gap is formed between the flow guide plate and the inner wall face of the storage box, a porous capillary plate and a groove structure are arranged on the two sides of the flow guide plate respectively, the porous capillary plate is connected with the groove structure, and a plurality of kidney-shaped pores are formed in the porous capillary plate in an array mode. And the waist-shaped capillary pores of the porous capillary plate correspond to the grooves of the groove structure. The channel type flow guide plate is simple and light in structure, high in reliability, high in stability and suitable for various microgravity acceleration and flow working conditions, has long-range liquid flow guide capacity and efficient gas-liquid separation performance, completely meets the development requirement of a future propelling system and has wide 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 achieves gas-liquid separation through the propellant management device (PMD). In a microgravity environment, the surface tension principle of liquid is used to transport the non-gas-entrained liquid propellant 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. 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 name of the invention is a laser welding method for heterogeneous material channel components of a surface tension tank. Its technical solution discloses Figure 2-3 , which has good flow conduction energy, but weak gas-liquid separation ability.

[0003] The existing mesh and plate propellant management devices have their own advantages and disadvantages, and the future propulsion system needs to adapt to large reverse acceleration environments and have large flow filling capabilities, which requires surface tension tanks to be able to adapt to large acceleration and large flow working conditions while ensuring operational reliability and stability. Therefore, combining the advantages and disadvantages of the existing two types of tanks, developing a new generation of suitable plate-mesh combined propellant management devices 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] In order to solve the above problems, a plate mesh combined with a channel-type guide plate based on a waist-shaped hole structure is provided. A brief overview of the invention is given 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 determine the key or important parts 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 mesh combined with a channel-type guide plate based on a waist-shaped hole structure comprises 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 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 by double-sided laser drilling to form a plurality of evenly arranged waist-shaped capillary holes.

[0011] Preferably, the diameter of the waist-shaped capillary pores is between 0.01 mm and 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 tank to the liquid outlet at the top end of the 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 one 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 a new generation of surface tension tank propellant management devices.

[0019] 2. The channel-type guide plate of the present invention has a simple and light structure, high reliability, strong stability, excellent gas-liquid separation effect, 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, so as to achieve full management of the propellant liquid in the tank, and possess long-range liquid diversion capabilities and efficient gas-liquid separation performance. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0023] Figure 3 for Figure 2 AA view and partial enlarged view of 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] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is described below by the specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0028] Specific implementation method 1: Combination Figure 1-5 The present embodiment is described. A channel-type guide plate based on a plate mesh combined with a waist-shaped hole structure in the present embodiment comprises 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 surface of the tank 2. There is a gap between the guide plate 1 and the inner wall surface 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 (such as Figure 5 As shown in FIG. 1 , 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 and the grooves of the groove structure 1b are arranged correspondingly to form a channel;

[0029] The side of the channel-type flow guide plate 1 away from the wall of the tank 2 is a "U"-shaped groove structure 1b, the groove of the groove structure 1b is a "U"-shaped groove, and the width of the groove of the groove structure 1b is 2 to 6 mm; the cross-section of the internal channel of the channel-type flow guide plate 1 is rectangular, and the groove structure 1b is welded to the capillary porous plate 1a, which ensures the structural strength of the channel-type flow guide plate and provides 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, thereby ensuring a sufficient transmission speed;

[0030] The waist-shaped capillary pores 3 of the capillary porous plate 1a are waist-shaped through holes, that is, (such as Figure 3-4 The side wall of the waist-shaped through hole is 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 size of the waist-shaped capillary pores 3 is in the range of 0.01 mm to 0.1 mm, which can provide a larger bubble bursting point pressure, effectively preventing the gas in the tank 2 from passing through the capillary porous plate 1a into the channel-type guide plate 1 and mixing 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 circumferential direction in the tank 2, and 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 is maintained and the east-west position is 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 corresponding arc-shaped, that is, the shape of the guide plate 1 is set corresponding to the shape of the inner wall surface 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 propellant liquid without air entrainment, thereby realizing full management of the propellant liquid in the surface tension tank.

[0037] A plate mesh combined with a channel-type guide plate based on a waist-shaped hole structure is applied to the channel-type guide plate, which can be used in conjunction with propellant management devices such as liquid accumulators and gas-liquid separators, and is particularly suitable for propellant management in surface tension tanks under microgravity environments; the capillary porous plate is provided with multiple micron-level waist-shaped capillary holes by double-sided laser drilling, which has a high bubble bursting point pressure, and acts as a gas barrier while retaining the propellant liquid, and has a good gas-liquid separation effect; the channel-type guide plate combines the advantages of the mesh-type and plate-type propellant management devices, and is not only simple and light in structure, but also safe and reliable, and can adapt to various large flow and large acceleration working environments, conforming to the development needs of the new generation of satellite propulsion systems, and has broad application prospects. .

[0038] Embodiment 1:

[0039] Combination Figure 1-5 A plate mesh combined with a channel-type guide plate based on a waist-shaped hole structure, wherein 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 driving action of surface tension, providing the propulsion system with propellant liquid without air entrainment, and realizing the full management of the propellant liquid in the surface tension tank;

[0040] In this embodiment, the channel guide plate 1 is arranged parallel to the inner wall surface 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 a long-range liquid diversion capability;

[0041] In this embodiment, there are four channel-type guide plates 1, which are evenly arranged along the circumferential direction 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 the north-south position is maintained and the east-west position is maintained;

[0042] In this embodiment, the side of the channel 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 the thickness is 1 mm.

[0044] In this embodiment, the cross section of the internal channel of the channel-type guide plate 1 is rectangular, the length ranges from 20 to 80 mm, and the width ranges from 2 to 6 mm. The gap in the channel under the microgravity environment can drive the liquid propellant to flow toward the liquid outlet under the action of surface tension, thereby 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 double-sided laser drilling, 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 functions as a gas barrier, which can prevent gas inhalation at a specific liquid level or pressure, which is also called the bubble bursting point;

[0047] In this embodiment, the aperture of the waist-shaped capillary pores 3 is in the range of 0.01 mm to 0.1 mm, which can provide a larger bubble bursting point pressure, and effectively prevent 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 the cross-sections are all circular. Figure 3 As shown, the apertures are defined as D1 and D2, respectively, and D1>D2; according to the formula for calculating the bubble bursting point pressure of cylindrical small holes based on the Young-Laplace equation, it can be seen 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 aperture 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 aperture D1, that is, compared with the cylindrical capillary pores with the same aperture 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 in FIG. 1 , 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 in the figure, 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 pores 3, which is about 2D1 to 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, and the gap distance is 2 to 8 mm, so as to prevent the gap from being too small and causing liquid blockage, and 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 guide plate's simple and light structure, high safety and reliability, but also can adapt to various large flow and high 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 arranged and combined, and those skilled in the art can exhaust all possibilities based on the mathematical knowledge of arrangement and combination. Therefore, the present invention will no longer describe the technical solutions after arrangement and combination one by one, but it should be understood that the technical solutions after arrangement and combination have been disclosed by the present invention.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A plate mesh combined channel-type guide plate 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 surface of the storage tank (2) are arranged parallel to each other, and there is a gap between the guide plate (1) and the storage tank (2), characterized in that: 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); a plurality of waist-shaped capillary holes (3) are evenly arranged on the capillary porous plate (1a); the waist-shaped capillary holes (3) of the capillary porous plate (1a) and the grooves of the groove structure (1b) are arranged correspondingly.

2. According to claim 1, a plate mesh combined with a channel-type guide plate based on a waist-shaped hole structure is characterized in that: The groove of the groove structure (1b) is a "U"-shaped groove, and the width of the groove of the groove structure (1b) is 2 to 6 mm.

3. A channel-type guide plate with a plate mesh combined with a waist-shaped hole structure according to claim 1 or 2, characterized in that: The waist-shaped capillary pores (3) of the capillary porous plate (1a) are waist-shaped through holes.

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

5. The plate mesh combined channel guide plate based on waist-shaped hole structure according to claim 3 is characterized by: The diameter of the waist-shaped capillary pore (3) is between 0.01 mm and 0.1 mm, and the axial length of the waist-shaped capillary pore (3) is consistent with the thickness of the capillary porous plate (1a).

6. The plate mesh combined channel guide plate based on 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).

7. The plate mesh combined channel guide plate based on waist-shaped hole structure according to claim 6 is characterized by: The number of the guide plates (1) is four, and the guide plates (1) are evenly arranged along the circumferential direction inside the tank (2).

8. A channel-type guide plate with a plate mesh combined with a waist-shaped hole structure according to claim 1, 6 or 7, 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.

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

10. The plate mesh combined channel guide plate based on waist-shaped hole structure according to claim 8, 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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