Oxygen tank with liquid nitrogen tank and liquid rocket

Abstract

The utility model provides an oxygen tank with a liquid nitrogen tank and a liquid rocket, and the liquid nitrogen tank is arranged in the oxygen tank and is fixedly arranged above an outflow molded surface of the oxygen tank through a bracket; the liquid nitrogen box comprises a lower hemisphere assembly and an upper hemisphere assembly, and the lower hemisphere assembly and the upper hemisphere assembly are connected in a sealed mode to form a sphere. The liquid nitrogen box is stored in the oxygen box, liquid oxygen in the oxygen box can preserve heat of the liquid nitrogen box by means of the characteristic that the temperature difference between the liquid oxygen and the liquid nitrogen is small, heat insulation wrapping of the liquid nitrogen box is avoided, the workload of heat insulation wrapping of the liquid nitrogen box is reduced, and meanwhile the weight of the liquid nitrogen box is reduced. The liquid nitrogen box is arranged to be a sphere, so that the negative pressure resistance of the liquid nitrogen box is improved, and meanwhile, the positive pressure resistance of the liquid nitrogen box is also improved.

Description

Technical Field

[0001] This application relates to the field of liquid rocket tank technology, specifically to an oxygen tank equipped with a liquid nitrogen tank and a liquid rocket. Background Technology

[0002] During rocket flight, oxygen tanks and liquid nitrogen tanks need to be pressurized. However, in the current technology, liquid nitrogen tanks are usually cylindrical in shape, which has a weak ability to resist both negative and positive pressure. When the external pressure is greater than the internal pressure by a certain value, the liquid nitrogen tank will be crushed. When the internal pressure of the cylinder is greater than the external pressure by a certain value, it will explode or be severely deformed.

[0003] In addition, in existing technologies, liquid nitrogen tanks and oxygen tanks are usually set up independently, requiring independent insulation of the liquid nitrogen tank, which increases the workload of heat insulation wrapping of the liquid nitrogen tank. Utility Model Content

[0004] In view of this, the purpose of this utility model embodiment is to provide an oxygen tank and a liquid rocket equipped with a liquid nitrogen tank, so as to solve at least one of the above-mentioned problems.

[0005] To achieve the above objectives, in a first aspect, this utility model provides an oxygen tank equipped with a liquid nitrogen tank, wherein a support is provided inside the oxygen tank, and the liquid nitrogen tank is positioned above the outlet profile of the oxygen tank via the support.

[0006] The outflow profile is located between the rear bottom of the oxygen tank and the main delivery pipeline of the oxygen tank.

[0007] In some possible implementations, the liquid nitrogen tank includes a lower hemisphere assembly and an upper hemisphere assembly, the lower hemisphere assembly and the upper hemisphere assembly being sealed together to form a sphere.

[0008] The lower hemisphere assembly includes a liquid nitrogen delivery pipe, a siphon structure, a liquid nitrogen delivery outlet, and a lower hemisphere shell;

[0009] One end of the liquid nitrogen delivery pipe is connected to the liquid nitrogen delivery outlet located on the lower hemispherical shell, and the other end of the liquid nitrogen delivery pipe is connected to the siphon structure located at the bottom of the lower hemispherical shell.

[0010] In some possible implementations, the lower hemisphere assembly further includes a delivery pipeline support for securing the liquid nitrogen delivery pipeline to the lower hemisphere housing.

[0011] In some possible implementations, the upper hemispherical assembly includes an upper hemispherical housing and a pressure-boosting flange disposed on top of the upper hemispherical housing.

[0012] In some possible implementations, the sphere is made of aluminum alloy.

[0013] In some possible implementations, the diameter of the sphere is greater than or equal to 2.5 times the diameter of the main oxygen delivery pipeline;

[0014] The bottom of the liquid nitrogen tank is 100mm to 200mm above the top of the outflow profile.

[0015] In some possible implementations, a filter screen with an opening ratio of 50% to 55% is laid on the surface of the support.

[0016] In some possible implementations, the oxygen tank is further provided with an anti-vortex plate and an anti-sway baffle, which are alternately arranged above the outflow profile.

[0017] In some possible implementations, the inner side of the anti-vortex plate is connected to the bracket, and the bottom of the anti-vortex plate is connected to the rear bottom of the oxygen tank;

[0018] The anti-sway baffle is connected to the side wall of the oxygen tank and is set horizontally, with a vertical height of 560mm to 600mm between it and the rear bottom of the oxygen tank.

[0019] In some possible implementations, the outflow profile includes a conical transition profile, a first rounded corner at the connection between the conical transition profile and the rear bottom of the oxygen tank, and a second rounded corner at the connection between the conical transition profile and the main delivery pipeline of the oxygen tank. The conical angle of the conical transition profile is 75 to 80 degrees, the first rounded corner is R300 mm to R350 mm, and the second rounded corner is R50 mm to R80 mm.

[0020] Secondly, this utility model provides a liquid rocket, which includes the oxygen tank with a liquid nitrogen tank as described in the first aspect.

[0021] The beneficial effects of this utility model embodiment are as follows:

[0022] This embodiment of the invention stores liquid nitrogen in an oxygen tank. Taking advantage of the similar temperature difference between liquid oxygen and liquid nitrogen, the liquid oxygen in the oxygen tank can keep the liquid nitrogen tank warm, avoiding the need for heat insulation wrapping of the liquid nitrogen tank, reducing the workload of heat insulation wrapping of the liquid nitrogen tank, and also reducing the weight of the liquid nitrogen tank.

[0023] This embodiment of the invention improves the liquid nitrogen tank's resistance to negative pressure (i.e., when the external pressure is greater than the internal pressure of the sphere by a certain value, such as 0.6 MPa, the liquid nitrogen tank will not be crushed) and also improves its resistance to positive pressure (i.e., when the internal pressure of the sphere is greater than the external pressure by a certain value, such as 3.0 MPa, the liquid nitrogen tank will not burst or be severely deformed).

[0024] The liquid nitrogen tank in this embodiment is made of aluminum alloy, which reduces the weight of the liquid nitrogen tank.

[0025] This embodiment of the invention places the liquid nitrogen tank above the outflow profile of the oxygen tank. The smooth transition of the spherical liquid nitrogen tank can suppress the collapse of the propellant flowing out of the liquid oxygen tank.

[0026] In this embodiment of the invention, the diameter of the liquid nitrogen tank is not less than 2.5 times the diameter of the main delivery pipeline of the oxygen tank, which can prevent the oxygen tank from collapsing. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a top view of the internal structure of the oxygen chamber according to an embodiment of the present invention;

[0029] Figure 2 This is a side view of the internal structure of an oxygen chamber according to an embodiment of the present utility model;

[0030] Figure 3 This is a partial perspective view of an oxygen chamber according to an embodiment of the present utility model;

[0031] Figure 4 This is a schematic diagram of the structure of a liquid nitrogen tank according to an embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the structure of a lower hemisphere assembly according to an embodiment of the present invention;

[0033] Figure 6 This is a cross-sectional view of a siphon structure according to an embodiment of the present utility model;

[0034] Figure 7 This is a schematic diagram of the structure of an upper hemispherical component according to an embodiment of this utility model.

[0035] Explanation of icon numbers:

[0036] 1. Liquid nitrogen tank; 11. Lower hemisphere assembly; 111. Liquid nitrogen delivery pipe; 112. Siphon structure; 113. Liquid nitrogen delivery outlet; 114. Delivery pipe support; 115. Lower hemisphere shell; 12. Upper hemisphere assembly; 121. Upper hemisphere shell; 122. Pressure-boosting flange;

[0037] 2. Oxygen tank; 21. Support frame; 22. Outflow profile; 221. Conical transition profile; 222. First rounded corner; 223. Second rounded corner; 23. Filter screen; 24. Anti-vortex plate; 25. Anti-sway baffle; 26. Main delivery pipeline of oxygen tank. Detailed Implementation

[0038] The features and exemplary embodiments of various aspects of this utility model will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a comprehensive understanding of this utility model. However, it will be apparent to those skilled in the art that this utility model can be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of this utility model by illustrating examples of it. In the accompanying drawings and the following description, at least some well-known structures and techniques have not been shown to avoid unnecessarily obscuring the utility model; and, for clarity, the dimensions of some structures may be exaggerated. Furthermore, the features, structures, or characteristics described below can be combined in any suitable manner in one or more embodiments.

[0039] Example 1

[0040] like Figure 1 , Figure 2 and Figure 3 As shown, this utility model provides an oxygen tank 2 equipped with a liquid nitrogen tank 1. A support 21 is provided inside the oxygen tank 2, and the liquid nitrogen tank 1 is positioned above the outflow profile 22 of the oxygen tank 2 via the support 21.

[0041] This embodiment of the invention stores liquid nitrogen tank 1 in oxygen tank 2 and fixes it above the outflow profile 22 by bracket 21. Taking advantage of the similar temperature difference between liquid oxygen and liquid nitrogen, the liquid oxygen in oxygen tank 2 can keep the liquid nitrogen tank warm, avoiding the need for heat insulation covering of liquid nitrogen tank 1, reducing the workload of heat insulation covering liquid nitrogen tank 1, and also reducing the weight of liquid nitrogen tank 1.

[0042] like Figure 4 As shown, the liquid nitrogen tank 1 includes a lower hemisphere assembly 11 and an upper hemisphere assembly 12, which are sealed together to form a sphere.

[0043] Specifically, during rocket flight, oxygen tank 2 and liquid nitrogen tank 1 need to be pressurized. Therefore, liquid nitrogen tank 1 should be able to withstand three harsh operating conditions: negative pressure, high pressure, and low temperature. To improve the performance of liquid nitrogen tank 1 in withstanding internal and external high pressure, this embodiment of the invention designs liquid nitrogen tank 1 as a sphere. This improves the liquid nitrogen tank's resistance to negative pressure, meaning that when the external pressure is greater than the internal pressure of the sphere by a certain value, such as 0.6 MPa, the liquid nitrogen tank will not be crushed. At the same time, it also improves the liquid nitrogen tank's resistance to positive pressure, meaning that when the internal pressure of the sphere is greater than the external pressure by a certain value, such as 3.0 MPa, the liquid nitrogen tank will not explode or be severely deformed.

[0044] like Figure 5 and Figure 6 As shown, in some embodiments, the lower hemisphere assembly 11 includes a liquid nitrogen delivery pipe 111, a siphon structure 112, a liquid nitrogen delivery outlet 113, a delivery pipe support 114, and a lower hemisphere shell 115. One end of the liquid nitrogen delivery pipe 111 is connected to the liquid nitrogen delivery outlet 113 disposed on the lower hemisphere shell 115, and the other end of the liquid nitrogen delivery pipe 111 is connected to the siphon structure 112 disposed at the bottom of the lower hemisphere shell 115. The liquid nitrogen delivery pipe 111 is fixed to the lower hemisphere shell 115 by the delivery pipe support 114.

[0045] In this embodiment, the liquid nitrogen tank 1 is placed in the oxygen tank 2. Liquid nitrogen is connected to the main liquid nitrogen tank delivery pipeline via the liquid nitrogen tank 1, the siphon structure 112, the liquid nitrogen delivery pipeline 111, and the liquid nitrogen delivery outlet 113. The siphon structure can utilize the gravity of the liquid and the pressure difference between the upper and lower parts to stably deliver liquid nitrogen from the lower hemisphere assembly 11 of the liquid nitrogen tank 1 to the main liquid nitrogen tank delivery pipeline without the need for additional power equipment (such as a pump). It continuously lifts the liquid nitrogen from the storage position and delivers it to the liquid nitrogen delivery outlet 113, ensuring the continuity of liquid nitrogen supply. In this embodiment, the use of the siphon structure avoids the bottom opening of the tank and the bottom connection of the liquid nitrogen delivery pipeline 111. The liquid nitrogen delivery pipeline 111 is fixed to the lower hemisphere shell 115 by the delivery pipeline bracket 114, which can prevent the liquid nitrogen delivery pipeline 111 from shaking during use.

[0046] like Figure 7 As shown, in some embodiments, the upper hemisphere assembly 12 includes an upper hemisphere housing 121 and a pressure-boosting flange 122 disposed on top of the upper hemisphere housing 121.

[0047] In this embodiment, the pressure-boosting flange 122 is located at the top of the liquid nitrogen tank 1. The pressure-boosting flange 122 serves as the inlet of the pressure-boosting port of the liquid nitrogen tank 1, providing an inlet for pressurizing gas to pressurize the liquid nitrogen tank 1.

[0048] In some embodiments, the spheres are made of aluminum alloy. This embodiment utilizes the low density of aluminum alloy to reduce the weight of the liquid nitrogen tank 1.

[0049] In some embodiments, the diameter of the liquid nitrogen tank 1 is greater than or equal to 2.5 times the diameter of the main oxygen delivery pipeline 26.

[0050] In this embodiment, the diameter of the liquid nitrogen tank 1 is not less than 2.5 times the diameter of the main oxygen delivery pipeline 26. This prevents the liquid oxygen in the oxygen tank 2 from collapsing during the outflow process. In other words, the liquid nitrogen tank 1 serves as an anti-collapse device for the oxygen tank 2, preventing collapse during the outflow process. Preferably, the diameter of the main liquid oxygen delivery pipeline is between 550mm and 600mm, and the diameter of the liquid nitrogen tank is between 1370mm and 1500mm.

[0051] In some embodiments, the bottom of the liquid nitrogen tank 1 is 100mm to 200mm above the top of the outflow profile 22. This embodiment makes full use of the spherical nature of the liquid nitrogen tank 1, placing it above the outflow profile 22 of the oxygen tank 2. The smooth transition of the sphere helps to suppress the collapse of the outflow propellant from the oxygen tank 2, preferably by 150mm.

[0052] In some embodiments, a filter screen 23 is laid on the surface of the support 21, and the opening ratio of the filter screen 23 is 50% to 55%.

[0053] Specifically, the filter screen 23 can be installed on either the inner or outer surface of the support 21, with an opening ratio of 50% to 55%. During use, the oxygen tank 2 may generate impurities inside, such as metal shavings and fragments of sealing material. The filter screen 23 can intercept these impurities, preventing them from entering the flow channel of the outflow profile 22 and avoiding blockage or damage to downstream equipment. Furthermore, the filter screen 23 can rectify the outflowing fluid, making it pass through the outflow profile more evenly, avoiding uneven outflow caused by local impurity accumulation or fluid disturbance, thereby ensuring the stability and consistency of the fluid outflow.

[0054] In some embodiments, the oxygen tank 2 is further provided with an anti-vortex plate 24 and an anti-sway baffle 25. The anti-vortex plate 24 and the anti-sway baffle 25 are alternately arranged above the outflow profile 22. The inner side of the anti-vortex plate 24 is connected to the support 21, and the bottom of the anti-vortex plate 24 is connected to the rear bottom of the oxygen tank 2. The anti-sway baffle 25 is connected to the side wall of the oxygen tank 2 and is arranged horizontally. The vertical height between the baffle and the rear bottom of the oxygen tank 2 is 560mm to 600mm.

[0055] In this embodiment, the anti-vortex plate 24 and the anti-sway baffle 25 can be the same in number, for example, four in each case. The four anti-vortex plates can be arranged symmetrically, and the four anti-sway baffles 25 can also be arranged symmetrically. The anti-vortex plate 24 and the anti-sway baffle 25 form a 45-degree angle, and their state can be adjusted under different accelerations. The thickness of both the anti-vortex plate 24 and the anti-sway baffle 25 is about 2mm, and they are made of stainless steel. The diameter of the anti-sway baffle is 1100mm.

[0056] When liquid oxygen flows within oxygen tank 2 or is disturbed by external factors, it is prone to generating vortices. The anti-vortex plate 24 can disrupt the conditions for vortex formation, making the liquid flow more stable. The presence of vortices can lead to uneven fluid velocity at the outlet of oxygen tank 2, affecting the stable supply of liquid oxygen to subsequent systems. The anti-vortex plate 24 also ensures more uniform flow of liquid oxygen out of oxygen tank 2, improving fluid stability and controllability.

[0057] Furthermore, during rocket launch, various attitude changes and accelerations occur, causing the liquid oxygen in oxygen tank 2 to easily slosh. This sloshing can cause a shift in the center of gravity of oxygen tank 2, affecting the rocket's flight stability. The anti-sloshing baffle 25 in this embodiment can effectively suppress the amplitude of liquid oxygen sloshing, increase the damping of liquid oxygen sloshing in oxygen tank 2, and make the center of gravity of the liquid in oxygen tank 2 relatively stable. This helps the rocket maintain good attitude and stability during flight, improving the accuracy and reliability of flight control.

[0058] In some embodiments, the outflow profile 22 includes a conical transition profile 221, a first rounded corner 222 at the connection between the conical transition profile 221 and the rear bottom of the oxygen tank 2, and a second rounded corner 223 at the connection between the conical transition profile 221 and the main delivery pipeline 26 of the oxygen tank. The conical angle of the conical transition profile 221 is 75 degrees to 85 degrees, the first rounded corner 222 is R300mm to R350mm, and the second rounded corner 223 is R50mm to R80mm.

[0059] Example 2

[0060] This utility model embodiment also provides a liquid rocket, which includes an oxygen tank 2 equipped with a liquid nitrogen tank 1 as described in Embodiment 1.

[0061] This embodiment of the invention stores liquid nitrogen tank 1 in oxygen tank 2. Taking advantage of the similar temperature difference between liquid oxygen and liquid nitrogen, the liquid oxygen in oxygen tank 2 can keep liquid nitrogen tank 1 warm, avoiding the need for heat insulation covering of liquid nitrogen tank 1, reducing the workload of heat insulation covering liquid nitrogen tank 1, and also reducing the weight of liquid nitrogen tank 1.

[0062] This embodiment of the invention improves the pressure resistance of the liquid nitrogen tank 1 by making the liquid nitrogen tank 1 a sphere.

[0063] The liquid nitrogen tank 1 in this embodiment is made of aluminum alloy, which reduces the weight of the liquid nitrogen tank.

[0064] In this embodiment of the invention, the liquid nitrogen tank 1 is positioned above the outlet surface 22 of the oxygen tank 2. The smooth transition of the spherical liquid nitrogen tank 1 can suppress the collapse of the propellant outlet from the oxygen tank 2.

[0065] In this embodiment of the invention, the diameter of the liquid nitrogen tank 1 is not less than 2.5 times the diameter of the main oxygen delivery pipeline 26, which can prevent the oxygen tank 2 from collapsing.

[0066] In the description of the embodiments of this utility model, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing the utility model and for 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 the utility model. Furthermore, the terms "first," "second," or "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0067] Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" in this utility model embodiment should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integrated connections; similarly, they can refer to mechanical connections, electrical connections, or direct connections, or indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0068] Although the present invention has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An oxygen tank (2) equipped with a liquid nitrogen tank (1), characterized in that, The oxygen tank (2) is provided with a support (21), and the liquid nitrogen tank (1) is provided above the outlet profile (22) of the oxygen tank (2) via the support (21); The outflow profile (22) is located between the rear bottom of the oxygen tank (2) and the main oxygen delivery pipeline (26).

2. An oxygen tank (2) equipped with a liquid nitrogen tank (1) according to claim 1, characterized in that, The liquid nitrogen tank (1) includes a lower hemisphere assembly (11) and an upper hemisphere assembly (12), wherein the lower hemisphere assembly (11) and the upper hemisphere assembly (12) are sealed together to form a sphere; the lower hemisphere assembly (11) includes a liquid nitrogen delivery pipe (111), a siphon structure (112), a liquid nitrogen delivery outlet (113), a delivery pipe support (114), and a lower hemisphere shell (115); One end of the liquid nitrogen delivery pipe (111) is connected to the liquid nitrogen delivery outlet (113) provided on the side wall of the lower hemispherical shell (115), and the other end of the liquid nitrogen delivery pipe (111) is connected to the siphon structure (112) provided at the bottom of the lower hemispherical shell (115). The liquid nitrogen delivery pipe (111) is fixed to the lower hemispherical shell (115) by the delivery pipe support (114).

3. An oxygen tank (2) equipped with a liquid nitrogen tank (1) according to claim 2, characterized in that, The upper hemisphere assembly (12) includes an upper hemisphere housing (121) and a pressure-boosting flange (122) disposed on the top of the upper hemisphere housing (121).

4. An oxygen tank (2) equipped with a liquid nitrogen tank (1) according to claim 2, characterized in that, The sphere is made of aluminum alloy.

5. An oxygen tank (2) equipped with a liquid nitrogen tank (1) according to claim 1, characterized in that, The diameter of the liquid nitrogen tank (1) is greater than or equal to 2.5 times the diameter of the main oxygen delivery pipeline (26); The bottom of the liquid nitrogen tank (1) is 100 mm to 200 mm above the top of the outflow profile (22).

6. An oxygen tank (2) equipped with a liquid nitrogen tank (1) according to claim 1, characterized in that, A filter screen (23) is laid on the surface of the support (21), and the filter screen (23) has an opening ratio of 50% to 55%.

7. An oxygen tank (2) equipped with a liquid nitrogen tank (1) according to claim 1, characterized in that, The oxygen tank (2) is also equipped with an anti-vortex plate (24) and an anti-sway baffle (25), which are alternately arranged above the outflow profile (22).

8. An oxygen tank (2) equipped with a liquid nitrogen tank (1) according to claim 7, characterized in that, The inner side of the anti-vortex plate (24) is connected to the bracket (21), and the bottom of the anti-vortex plate (24) is connected to the rear bottom of the oxygen tank (2); The anti-sway baffle (25) is connected to the side wall of the oxygen tank (2) and is set horizontally, with a vertical height of 560mm to 600mm between it and the rear bottom of the oxygen tank (2).

9. An oxygen tank (2) equipped with a liquid nitrogen tank (1) according to claim 1, characterized in that, The outflow profile (22) includes a conical transition profile (221), a first rounded corner (222) at the connection between the conical transition profile (221) and the rear bottom of the oxygen tank (2), and a second rounded corner (223) at the connection between the conical transition profile (221) and the main delivery pipeline (26) of the oxygen tank; The cone angle of the conical transition surface (221) is 75 degrees to 85 degrees; The first fillet (222) is R300mm to R350mm; The second fillet (223) is R50mm to R80mm.

10. A liquid rocket, characterized in that, The liquid rocket includes an oxygen tank (2) equipped with a liquid nitrogen tank (1) as described in any one of claims 1-9.

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