Stable fuel supply system for fuel tank of unmanned aerial vehicle

Abstract

The utility model relates to a stable fuel supply system for a fuel tank of an unmanned aerial vehicle, and aims to solve the problem of unstable fuel supply caused by shaking of a fuselage in the flight process of the unmanned aerial vehicle. The stable oil supply system comprises an oil tank, a wave-proof plate, an oil storage chamber, an oil storage groove, a one-way valve and an oil suction pipe. The wave-proof plate is arranged in the oil tank and used for slowing down fluctuation of the liquid level of fuel oil. The oil storage tank is located at the lowermost part of the oil tank and controls fuel oil to flow in through the one-way valve to ensure that the oil suction pipe is always below the fuel oil level; the oil storage chamber is communicated with the side wall of the oil tank, allows fuel oil to flow in from two sides and prevents reverse flow through the one-way valve; the one-way valve oil suction pipe is used for controlling the flow direction of fuel oil, and oil supply interruption caused by backflow is avoided. According to the system, by improving the internal structure of the fuel tank, it is ensured that the unmanned aerial vehicle can provide stable fuel supply for the engine in different flight states, and therefore the flight safety and reliability of the unmanned aerial vehicle are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of unmanned aerial vehicles, and in particular to a stable fuel supply system for a fuel tank of an unmanned aerial vehicle. Background Art

[0002] With the rapid development of UAV technology, its application in military reconnaissance, geographic mapping, agricultural monitoring and other fields has become more and more extensive. The flight stability of UAVs directly affects the efficiency and safety of their missions. Especially in long-term and complex flight missions, the stability of fuel supply has become an issue that cannot be ignored. In particular, small UAVs require a simplified oil circuit structure to reduce weight and improve fuel supply reliability due to their limited load.

[0003] In existing UAV fuel tank designs, a simple tank structure is usually used to transfer fuel to the engine through gravity. However, there are some problems with this design. First, when the UAV is flying at high speed or performing complex maneuvers, the fuel level will change, resulting in unstable fuel supply pressure. Second, the traditional fuel tank design does not take into account the fluctuation of the fuel level, which may cause interruption or insufficient fuel supply. In addition, the traditional fuel tank design does not take into account the problem of fuel reflux, which may cause damage or failure of the fuel supply system.

[0004] Therefore, it is particularly important to develop a stable internal fuel supply system for UAV fuel tanks that can maintain a stable fuel supply. Summary of the invention

[0005] In order to solve the above problems, the present invention proposes a stable fuel supply system for a UAV tank. The system mainly includes components such as a tank shell, a wave-breaking plate, an oil storage chamber, an oil storage tank, a one-way valve, and an oil suction pipe. The design of the built-in wave-breaking plate and the one-way valve significantly improves the adaptability and stability of the fuel supply system to changes in flight attitude; stable fuel supply can be achieved without adding additional auxiliary fuel tanks, reducing the weight and complexity of the overall system; the internal structure of the fuel tank is optimized, and the flight safety and reliability of the UAV are improved.

[0006] The stable fuel supply system of the UAV fuel tank mainly includes a fuel tank shell, a wave-breaking plate, an oil storage chamber, an oil storage tank, a one-way valve and an oil suction pipe; the wave-breaking plate, the oil storage chamber, the oil storage tank, the one-way valve and the oil suction pipe are all arranged inside the fuel tank shell; the wave-breaking plate is used to prevent the swaying of the fuel liquid in the fuel tank from causing the change of the center of gravity; the one-way valve is arranged on the wave-breaking plate, and is used to make the fuel flow from the oil storage chamber into the oil storage tank in one direction, and the bottom of the oil suction pipe extends into the oil storage tank, and is used to absorb the fuel.

[0007] A further improvement is that the wave-breaking plate divides the interior of the oil tank shell into a first part, a second part, and a third part, wherein the first part and the third part are the oil storage chamber, and the oil suction pipe and the oil storage tank are both arranged in the second part.

[0008] A further improvement is that the oil storage tank is provided at the bottom of the fuel tank shell, the fuel flows into the oil storage tank from the one-way valve, the oil suction pipe passes through the wave-breaking plate from top to bottom and penetrates into the oil storage tank, and the oil suction pipe is always below the oil level.

[0009] A further improvement is that the fuel flows into the oil storage tank from both sides, the one-way valve prevents the fuel from flowing out of the oil storage tank, and the oil suction pipe sucks the fuel regardless of the posture of the fuel tank.

[0010] A further improvement is that a certain gap is provided between the wave-breaking plate and the inner wall of the fuel tank shell to facilitate the flow of fuel in the fuel tank while preventing unnecessary resistance caused by close contact with the inner wall.

[0011] A further improvement is that the one-way valve includes one or more one-way valves for controlling the direction in which the fuel flows from the oil storage chamber into the oil storage tank.

[0012] The shape and size of the fuel storage tank are specially designed to store sufficient fuel under various flight conditions to ensure that the fuel suction pipe can continuously absorb the required amount of fuel.

[0013] The wave-breaking plate is made of lightweight and high-strength material to reduce the weight of the entire fuel supply system and improve the load efficiency of the UAV.

[0014] The one-way valve oil suction pipe is made of corrosion-resistant and wear-resistant materials, ensuring stable performance and service life in long-term use.

[0015] The fuel tank is designed to be streamlined in shape to reduce air resistance, which helps to improve the flight performance and fuel economy of the UAV.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The stable fuel supply system of the UAV fuel tank of the present invention includes a carefully designed fuel tank, which is provided with a wave-breaking plate inside the fuel tank to reduce the fluctuation of the fuel liquid level caused by the change of flight attitude. The wave-breaking plate is made of a lightweight but high-strength material, which can not only effectively reduce the swaying of the fuel, but also keep the weight of the entire fuel tank within a reasonable range. The oil storage tank is located at the bottom of the fuel tank and is connected to the oil storage chamber through one or more one-way valves. This design ensures that the oil suction pipe can always be below the fuel liquid level even when the UAV is flying at high speed or performing complex maneuvers, thereby ensuring a continuous and stable supply of fuel. In addition, the present invention also takes into account the problem of fuel reflux. By setting a one-way valve, the damage or failure of the fuel supply system caused by fuel reflux is effectively avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 : Schematic diagram of the overall structure of the UAV tank stable fuel supply system;

[0020] Figure 2 : Schematic diagram of the shell of the UAV fuel tank stable fuel supply system;

[0021] Figure 3 : Schematic diagram of the layout of the wave-breaking plates inside the fuel tank;

[0022] 1. Oil tank shell; 2. Wave-breaking plate; 21. Side plate; 211. First through hole; 212. Embedded groove; 22. Middle plate; 221. Second through hole; 222. Vertical middle plate; 223. Horizontal middle plate; 224. Middle plate embedded groove; 3. One-way valve; 4. Oil suction pipe; 5. Oil storage tank; 6. Oil storage chamber. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0024] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] The following embodiments are intended to further illustrate but not limit the stable fuel supply system for a UAV tank described in the present invention.

[0026] The fuel tank shell 1 serves as the outer protective layer of the entire fuel supply system. It not only needs to bear the weight of the fuel, but also has the ability to resist changes in the external environment. In the present application, the fuel tank shell 1 is made of a lightweight, high-strength material and also has excellent corrosion resistance, so that it can withstand different climatic conditions, i.e. physical shocks, while remaining lightweight and not adding extra flight burden to the drone. The wave-breaking plate 2 is located inside the fuel tank, maintaining a certain distance from the inner wall of the fuel tank to form a gap. By designing and installing a wave-breaking plate inside the fuel tank, the fluctuation of fuel caused by changes in the aircraft's attitude can be reduced during the flight of the drone, thereby maintaining a stable supply of fuel. Figure 3 As shown, the wave-breaking plate 2 includes two side plates 21 and three middle plates 22. The side plates 21 are provided with a first through hole 211 and an embedded groove 212 for accommodating the middle plates 22. The middle plates 22 are provided with a second through hole 221 and a protruding stopper. The aperture of the second through hole 221 is smaller than that of the first through hole 211. The protruding stopper is embedded in the embedded groove of the side plates 21 to ensure that the two side plates 21 and the three middle plates 22 are connected and firmly connected. Among them, the first through hole 211 on the side plate 21 is used to balance the air pressure when the fuel flows, while the second through hole 221 on the middle plate is designed to be smaller to control the flow speed and fluctuation amplitude of the fuel. In addition, the combined use of the protruding stopper and the embedded groove not only enhances the stability of the wave-breaking plate structure, but also facilitates the assembly and maintenance of the fuel tank.

[0027] Among them, the middle plate 22 includes two identical vertical middle plates 222 and a horizontal middle plate 223. The vertical middle plates 222 are also provided with middle plate grooves 224, which are arranged at the upper part of the vertical middle plates 222. The protruding limiting pieces on the horizontal middle plates 223 are embedded in the middle plate grooves 225, so that the horizontal middle plates 223 and the two vertical middle plates 222 are connected and the connection is firm.

[0028] In an optional embodiment of the present application, the two side plates 21 of the wave-breaking plate 2 evenly divide the oil tank into three parts, namely the first part, the second part and the third part, and the first part is connected to the second part and the third part; the second part is in the middle part of the oil tank, and is provided with a middle plate 22 and an oil suction pipe 4, and the oil storage tank is in the second part, and the first part and the third part are both oil storage chambers 6.

[0029] The one-way valve 3 is a control component installed between the oil storage chamber and the oil storage tank. Specifically, it is installed at the bottom of the two side plates 21 of the wave-breaking plate. The two one-way valves 3 can only be opened toward the inside surrounded by the wave-breaking plate, and cannot be opened toward the outside. It allows the fuel to flow from the oil storage chamber to the oil storage tank in one direction, but prevents the fuel from flowing in the opposite direction, ensuring that a stable fuel supply can be maintained even when the aircraft attitude changes. By installing the one-way fire door 3 at the bottom of the two side plates 21 of the wave-breaking plate, the principle of gravity and the dynamic pressure difference of the fuel is used to intelligently adjust the flow direction of the fuel.

[0030] One end of the oil suction pipe 4 is connected to the oil storage tank 5, and the other end is connected to the engine of the UAV. The oil suction pipe 4 passes through the center of the horizontal middle plate 223 and goes down to the oil storage tank 5 at the bottom of the fuel tank. In this way, the oil suction pipe 4 not only ensures the optimization of the oil suction position, but also minimizes the possibility of air entering the fuel system through its structure. The oil suction pipe 4 is designed to always be below the fuel liquid level. Through the combination of the one-way valve 3 and the oil storage tank 5, it is ensured that fuel can be sucked even under severe dynamic conditions.

[0031] The oil storage tank 5 is located at the bottom of the fuel tank and is where the fuel flowing down through the one-way valve 3 is collected. Its capacity is designed according to actual needs to meet the needs of the drone in different flight modes, including long-term flights or specific operations that require a large amount of fuel. This design ensures that the oil suction pipe 4 can be immersed in the fuel in any flight posture of the drone, thereby providing a continuous and stable fuel supply.

[0032] The oil storage chamber 6 is located in the first and third parts of the fuel tank, adjacent to the wave-breaking plate 2, and is used to temporarily store the fuel flowing in from both sides of the fuel tank. The oil storage chamber 6 is connected to the one-way valve 3, so that the fuel can flow into the oil storage tank 5 stably through the valve.

[0033] These components form an orderly fuel flow path inside the fuel tank: the fuel first enters the fuel storage chamber 6 from both sides of the fuel tank, then flows into the fuel storage tank 6 through the one-way valve 3, and finally is stably delivered to the engine of the UAV through the oil suction pipe 4. Through the close cooperation and coordinated work of the above components, the UAV fuel tank stable fuel supply system of the present invention can provide efficient and reliable fuel supply under various complex flight conditions, which not only improves the flight performance and safety of the UAV, but also provides solid technical support for its use in a wider range of application fields.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0035] The embodiments described above are only descriptions of the preferred methods of the present application, and are not intended to limit the scope of the present application. Without departing from the design spirit of the present application, various modifications and improvements made to the technical solutions of the present application by ordinary technicians in this field should fall within the protection scope determined by the claims of the present application.

Claims

1. A stable fuel supply system for an unmanned aerial vehicle tank, characterized in that: It includes a fuel tank shell, a wave-breaking plate, an oil storage chamber, an oil storage tank, a one-way valve and an oil suction pipe; the wave-breaking plate, the oil storage chamber, the oil storage tank, the one-way valve and the oil suction pipe are all arranged inside the fuel tank shell; the wave-breaking plate is used to prevent the fuel liquid from swaying in the fuel tank and causing the change of the center of gravity; the one-way valve is arranged on the wave-breaking plate, and is used to make the fuel flow from the oil storage chamber into the oil storage tank in one direction, and the bottom of the oil suction pipe extends into the oil storage tank, and is used to absorb the fuel.

2. The UAV fuel tank stable fuel supply system according to claim 1 is characterized in that: The wave-breaking plate divides the interior of the oil tank shell into a first part, a second part, and a third part, wherein the first part and the third part are the oil storage chamber, and the oil suction pipe and the oil storage tank are both arranged in the second part.

3. The UAV fuel tank stable fuel supply system according to claim 2 is characterized in that: The oil storage tank is provided at the bottom of the oil tank shell, and the fuel flows into the oil storage tank from the one-way valve. The oil suction pipe passes through the wave-breaking plate from top to bottom and penetrates into the oil storage tank, and the oil suction pipe is always below the oil level.

4. The UAV fuel tank stable fuel supply system according to claim 3 is characterized in that: The fuel flows into the oil storage tank from both sides, and the one-way valve prevents the fuel from flowing out of the oil storage tank. Regardless of the posture of the fuel tank, the fuel suction pipe can absorb the fuel.

5. The UAV fuel tank stable fuel supply system according to claim 3 is characterized in that: A certain gap is provided between the wave-breaking plate and the inner wall of the fuel tank shell to facilitate the flow of fuel in the fuel tank.

6. The UAV fuel tank stable fuel supply system according to claim 3 is characterized in that: The one-way valve includes one or more one-way valves for controlling the direction in which the fuel flows from the oil storage chamber into the oil storage tank.

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