Common base surface tension reservoir

Abstract

The present application provides a kind of co-base surface tension tank, comprising: tank shell, intermediate bottom, oxygen tank management device, fuel tank management device and composite winding layer;The intermediate bottom is connected in the tank shell, and the inner arc side of the intermediate bottom is arranged as fuel tank between the tank shell, the bottom of the fuel tank is provided with the fuel tank management device, the outer arc side of the intermediate bottom is arranged as oxygen tank with the tank shell, and the bottom of the oxygen tank is provided with the oxygen tank management device;The outer surface of the tank shell is wound with the composite winding layer.The present application realizes the design of co-base structure and special-shaped management device in limited axial size, and realizes the light weight of tank by composite winding, which is of great significance for the application of co-base surface tension tank.

Description

Technical Field

[0001] This invention relates to the field of tank structures, and more specifically, to a common-bottom surface tension tank. Background Technology

[0002] Space propulsion systems require various pressure vessels to store liquids and gases. These pressure vessels are crucial components of space launch vehicles. As propellant management components, the design of propellant tanks is highly correlated with the overall system design. With the development of manned spaceflight, higher demands are being placed on lightweight and high-emission-efficiency propellant tanks, along with requirements for their center of gravity (CG). The aim is to lower the CG of the spacecraft by reducing the CG of the tanks.

[0003] The common-bottom tank uses a common-bottom structure to divide the tank into an upper and lower tank, saving the weight of the tank bottom. Furthermore, the pressure difference between the upper and lower tanks can be used to offset their respective internal pressure loads, further reducing the overall weight of the common-bottom design. The common-bottom tank makes full use of the space within the tank section, saving weight in that section and shortening the rocket's height, which is beneficial for rocket weight reduction and attitude control.

[0004] Current common-bottom tanks are mainly used in the launch vehicle field, with relatively low operating pressures, typically 0.5MPa-0.8MPa. The tank shell is made entirely of metal. During flight, the propellant sinks to the bottom, eliminating the need for dedicated propellant management. Furthermore, the intermediate bottom is generally assembled to the tank's cylindrical section, requiring a cylindrical tank shell structure. Spacecraft attitude control propulsion system tanks typically operate at 2.0MPa. Conventional all-metal shells are not conducive to lightweight tank design. The operating environment of spacecraft attitude control propulsion system tanks is microgravity, necessitating propellant management under microgravity conditions. Spacecraft attitude control propulsion systems have specific requirements for the integrated design of the tank and the system; the spatial envelope dimensions make it difficult to fully guarantee a cylindrical tank structure. Therefore, conventional common-bottom tanks cannot be widely used in spacecraft attitude control propulsion systems. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the purpose of this invention is to provide a common-bottom surface tension tank.

[0006] A common-bottom surface tension tank according to the present invention includes: a tank shell, an intermediate bottom, an oxygen tank management device, a fuel tank management device, and a composite material winding layer;

[0007] The intermediate bottom is connected inside the storage tank shell. A fuel tank is set between the inner arc side of the intermediate bottom and the storage tank shell. A fuel tank management device is set at the bottom of the fuel tank. An oxygen tank is set between the outer arc side of the intermediate bottom and the storage tank shell. An oxygen tank management device is set at the bottom of the oxygen tank.

[0008] The composite material winding layer is wrapped around the outer surface of the tank shell.

[0009] Preferably, the tank shell is configured as a thin-walled ellipsoidal shell, and the intermediate bottom is configured as a thin-walled spherical shell.

[0010] Preferably, the ratio of the minor axis to the major axis of the tank shell is 0.65, the ratio of the thickness δ1 of the tank shell to the major axis D1 is less than 0.0006, and the ratio of the thickness δ2 of the intermediate bottom to the diameter D2 is less than 0.0005.

[0011] Preferably, the tank shell and the intermediate bottom are made of 5A06 aluminum alloy, 5B70 aluminum alloy, 2219 aluminum alloy or 2195 aluminum alloy.

[0012] Preferably, the oxygen tank management device is fixedly installed on the tank shell, and the oxygen tank management device and the tank shell are sealed by an O-ring.

[0013] Preferably, the fuel tank management device is fixedly installed on the tank shell, the fuel tank management device is configured as a complete ring structure, and the fuel tank management device is connected to the corrugated pipe of the tank shell.

[0014] Preferably, the oxygen tank pressure measuring tube is fixedly installed on the inner arc side of the middle bottom by a clamp, and one end of the oxygen tank pressure measuring tube is connected to a pressure measuring port of the storage tank shell.

[0015] Preferably, a fuel tank pressure measuring pipe is fixedly installed on one inner side wall of the storage tank shell corresponding to the outer arc side of the middle bottom by a clamp, and one end of the fuel tank pressure measuring pipe is connected to a pressure measuring port of the storage tank shell.

[0016] Preferably, the composite material winding layer is a SYT55S carbon fiber winding layer.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. This invention realizes the design of a common bottom structure within a limited axial dimension and the design of an irregularly shaped management device. It also achieves the lightweighting of the tank through composite material winding. The original ratio of wall thickness to long axis was 0.003. After adding the winding layer, the ratio of wall thickness to long axis is 0.0006, and the wall thickness is reduced to 20% of the original. This is of great significance for the application of common bottom surface tension tanks.

[0019] 2. The storage tank of this invention has an ellipsoidal structure with a diameter of 2510mm, which maximizes the use of the radial dimension of the aircraft and effectively reduces the axial dimension of the storage tank, thereby lowering the center of gravity of the aircraft.

[0020] 3. This invention enables the management of propellants in a microgravity environment through a management device;

[0021] 4. The invention uses welding to connect the intermediate bottom of the tank to the ellipsoidal shell, breaking through the technical limitation that the intermediate bottom can only be connected to the column section, thus expanding the application range of the common bottom tank. Attached Figure Description

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

[0023] Figure 1 This is a schematic diagram of the overall structure of the common-bottom surface tension tank;

[0024] Figure 2 This is a partially enlarged cross-section of the tank shell;

[0025] Figure 3 This is a magnified view of a portion of the middle bottom section;

[0026] As shown in the figure:

[0027] Detailed Implementation

[0028] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0029] Example 1

[0030] like Figure 1 As shown, this embodiment includes: a storage tank shell 1, an intermediate bottom 2, an oxygen tank management device 3, a fuel tank management device 4, and a composite material winding layer 7; the intermediate bottom 2 is connected inside the storage tank shell 1, the fuel tank is set between the inner arc side of the intermediate bottom 2 and the storage tank shell 1, the fuel tank management device 4 is set at the bottom of the fuel tank, the oxygen tank is set between the outer arc side of the intermediate bottom 2 and the storage tank shell 1, the oxygen tank management device 3 is set at the bottom of the oxygen tank, and the composite material winding layer 7 is wound on the outer surface of the storage tank shell 1.

[0031] like Figure 2 and Figure 3As shown, the tank shell 1 is a thin-walled ellipsoidal shell, and the intermediate bottom 2 is a thin-walled spherical shell. The ratio of the minor axis to the major axis of the tank shell 1 is 0.65, the ratio of the thickness δ1 to the major axis D1 of the tank shell 1 is less than 0.0006, and the ratio of the thickness δ2 to the diameter D2 of the intermediate bottom 2 is less than 0.0005. The materials used for the tank shell 1 and the intermediate bottom 2 are 5A06 aluminum alloy, 5B70 aluminum alloy, 2219 aluminum alloy, or 2195 aluminum alloy. The composite material winding layer 7 is a SYT55S carbon fiber winding layer.

[0032] The oxygen tank management device 3 is fixedly installed on the storage tank shell 1, and the oxygen tank management device 3 and the storage tank shell 1 are sealed by an O-ring. The fuel tank management device 4 is fixedly installed on the storage tank shell 1. The fuel tank management device 4 is configured as a complete ring structure and is connected to the bellows of the storage tank shell 1. The oxygen tank pressure measuring pipe 5 is fixedly installed on the inner arc side of the intermediate bottom 2 by clamps, and one end of the oxygen tank pressure measuring pipe 5 is connected to a pressure measuring port of the storage tank shell 1. The fuel tank pressure measuring pipe 6 is fixedly installed on the inner side wall of the storage tank shell 1 on the outer arc side of the intermediate bottom 2 by clamps, and one end of the fuel tank pressure measuring pipe 6 is connected to a pressure measuring port of the storage tank shell 1.

[0033] Example 2

[0034] Example 2 is a preferred example of Example 1.

[0035] like Figure 1 As shown, this embodiment includes: a storage tank shell 1, an intermediate bottom 2, an oxygen tank management device 3, a fuel tank management device 4, an oxygen tank pressure measuring tube 5, a fuel tank pressure measuring tube 6, and a composite material winding layer 7.

[0036] The intermediate bottom 2 is located inside the tank shell 1 and is welded to the inner side of the ellipsoidal shell of the tank shell 1; the oxygen tank management device 3 is located at the bottom of the oxygen tank, and the fuel tank management device 4 is located at the bottom of the fuel tank; the oxygen tank pressure measuring pipe 5 and the fuel tank pressure measuring pipe 6 are respectively located on the intermediate bottom 2 and the wall of the tank shell 1. The composite material winding layer 7 is wound around the outer surface of the tank shell 1.

[0037] like Figure 2 and Figure 3As shown, the tank shell 1 is a thin-walled ellipsoidal welded structure. The major axis of the tank shell 1 is 2510 mm, the ratio of the minor axis to the major axis is 0.65, the column height is 40 mm, and the ratio of the thickness δ1 to the major axis D1 of the tank shell is less than 0.0006. The material used to prepare the tank shell 1 is one of 5A06, 5B70, 2219, and 2195. The intermediate bottom 2 is a thin-walled spherical structure with an inner diameter of 2400 mm. The ratio of the thickness δ2 to the diameter D2 of the intermediate bottom 2 is less than 0.0005, and the material used to prepare the intermediate bottom 2 is one of 5A06, 5B70, 2219, and 2195. The intermediate bottom 2 is connected to the tank shell 1 by friction stir welding or argon arc welding.

[0038] The oxygen tank management device 3 has a discharge flow rate of 5-10 L / s. It is connected to the tank shell 1 by 24 axial bolts and sealed with two O-rings to ensure that propellant from the oxygen tank is delivered to the downstream pipeline only through the oxygen tank management device 3. The fuel tank management device 4 also has a discharge flow rate of 5-10 L / s. It is connected to the tank shell 1 by 24 axial bolts and is a ring-shaped device with a diameter of 2200 mm. The fuel tank management device 4 delivers propellant to the downstream pipeline through a corrugated pipe inside the tank.

[0039] The oxygen tank pressure measuring pipe 5 and the fuel tank pressure measuring pipe 6 are connected to the pressure measuring ports of the storage tank shell 1 by bolts. The oxygen tank pressure measuring pipe 5 and the fuel tank pressure measuring pipe 6 are fixed to the intermediate bottom 2 and the storage tank shell 1 respectively by clamps. The composite material winding layer 7 is a SYT55S carbon fiber winding layer.

[0040] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0041] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A common-bottom surface tension storage tank, characterized in that, include: The tank shell (1), the intermediate bottom (2), the oxygen tank management device (3), the fuel tank management device (4), and the composite material winding layer (7); The storage tank shell (1) is connected to the intermediate bottom (2). A fuel tank management device (4) is set between the inner arc side of the intermediate bottom (2) and the storage tank shell (1). A fuel tank is set at the fuel tank management device (4). An oxygen tank management device (3) is set between the outer arc side of the intermediate bottom (2) and the storage tank shell (1). An oxygen tank is set at the oxygen tank management device (3). The outer surface of the storage tank shell (1) is wrapped with the composite material winding layer (7). The tank shell (1) is configured as a thin-walled ellipsoidal shell, and the intermediate bottom (2) is configured as a thin-walled spherical shell; The ratio of the minor axis to the major axis of the tank shell (1) is 0.65, the ratio of the thickness δ1 of the tank shell (1) to the major axis D1 is less than 0.0006, and the ratio of the thickness δ2 of the intermediate bottom (2) to the diameter D2 is less than 0.0005. The fuel tank management device (4) is fixedly installed on the storage tank shell (1). The fuel tank management device (4) is configured as a complete ring structure. The fuel tank management device (4) is connected to the corrugated pipe of the storage tank shell (1). The oxygen tank pressure measuring tube (5) is fixedly installed on the inner arc side of the middle bottom (2) by a clamp, and one end of the oxygen tank pressure measuring tube (5) is connected to a pressure measuring port of the storage tank shell (1); The inner side wall of the storage tank shell (1) corresponding to the outer arc side of the middle bottom (2) is fixedly installed with a fuel tank pressure measuring pipe (6) by a clamp. One end of the fuel tank pressure measuring pipe (6) is connected to a pressure measuring port of the storage tank shell (1).

2. The common-bottom surface tension tank according to claim 1, characterized in that: The tank shell (1) and the intermediate bottom (2) are made of 5A06 aluminum alloy, 5B70 aluminum alloy, 2219 aluminum alloy or 2195 aluminum alloy.

3. The common-bottom surface tension tank according to claim 1, characterized in that: The oxygen tank management device (3) is fixedly installed on the storage tank shell (1), and the oxygen tank management device (3) and the storage tank shell (1) are sealed by an O-ring.

4. The common-bottom surface tension tank according to claim 1, characterized in that: The composite material winding layer (7) is a SYT55S carbon fiber winding layer.

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