Unmanned aerial vehicle based on narrow tube effect

Abstract

The invention relates to the technical field of unmanned aerial vehicles, in particular to an unmanned aerial vehicle based on a narrow tube effect. The unmanned aerial vehicle comprises an unmanned aerial vehicle body and uniformly-distributed narrow pipe channel devices, the unmanned aerial vehicle body is provided with rotors, the tops of the narrow pipe channel devices surround the rotors and are located below the rotors, the bottoms of the narrow pipe channel devices are provided with steady-flow grids, and the inner diameters of the narrow pipe channel devices are gradually reduced from top to bottom. The narrow pipe channel device is provided with an air inlet, an air outlet and a high-precision airflow sensor, the steady flow grating comprises a fixed grating and a rotating grating, and an airflow channel is regulated and controlled through the adjusting assembly. The inner wall is made of ultra-high molecular weight polyethylene materials, and the outer wall is provided with flow deflectors. According to the unmanned aerial vehicle, the narrow pipe effect is used for accelerating airflow to improve the wind energy efficiency, the steady flow grating and the sensor enhance the stability, the narrow pipe channel device replaces a support optimization structure, the unmanned aerial vehicle is suitable for aerial photography, logistics and other scenes, and the endurance and loading capacity is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of unmanned aerial vehicles (UAVs), and in particular to a UAV based on a narrow tube effect. Background Art

[0002] As a flexible and efficient flying device, drones have been widely used in various fields. Their flight performance primarily depends on the lift generated by their rotors, and the efficiency with which they utilize airflow directly impacts the drone's endurance, payload capacity, and stability. Traditional drone rotors are often exposed, causing significant airflow diffusion beneath the rotors, resulting in significant energy loss and low wind energy utilization efficiency. Furthermore, traditional drones' supports serve only a single function, disrupting airflow stability and further impacting flight performance.

[0003] In the field of energy utilization, the narrow tube effect (i.e., the phenomenon that the velocity of a fluid increases when it passes through a narrow channel) has been successfully applied to scenarios such as wind energy collection. For example, the narrow tube wind power system developed by Jiangsu Zhongyun Wind Power Technology Co., Ltd. can effectively utilize wind energy in low wind speed areas; other domestic research has also solved problems such as wind collection, wind induction, and wind speed increase by combining architectural science with the narrow tube effect, and promoted the application of narrow tube wind technology in scenarios such as offshore and land. Although a systematic research system has not been formed abroad, there are also practices that utilize the narrow tube effect in the natural environment. For example, wind towers in the Middle East use similar principles to achieve natural ventilation, and small towns along the Mediterranean coast drive small wind turbines through narrow streets and alleys.

[0004] However, the application of the narrow tube effect in the field of UAVs is still a blank. Traditional UAVs have the following defects:

[0005] Low efficiency in wind energy utilization: the airflow generated by the exposed rotor diffuses in all directions and cannot be utilized in a concentrated manner, resulting in a large loss of lift, short flight time, and limited load capacity; poor airflow stability: during flight, external airflow interference and the rotor's own airflow turbulence can easily cause the drone to bump, affecting flight stability, especially in complex environments; single structural function: traditional brackets only play a supporting role, which not only increases the weight of the fuselage, but may also destroy the airflow field and aggravate energy loss; limited environmental adaptability: in low wind speed or complex airflow environments, the power output of traditional drones is prone to fluctuations, making it difficult to maintain stable flight.

[0006] Therefore, combining the narrow tube effect with the UAV structure to develop a UAV that can improve wind energy utilization efficiency and enhance flight stability has become an important direction for improving UAV performance and is of great significance to expanding the application scenarios of UAVs. Summary of the Invention

[0007] The present invention aims to overcome the above problems and provide a UAV based on the narrow tube effect. To achieve the above object, the present invention adopts the following technical solutions:

[0008] A UAV based on the narrow tube effect comprises a UAV body and a narrow tube channel device, wherein a plurality of narrow tube channel devices are evenly arranged around the UAV body, the UAV body is provided with a plurality of rotors, the tops of the narrow tube channel devices surround the rotors, and the narrow tube channel devices are located below the rotors;

[0009] A flow stabilizing grid is provided at the bottom of the narrow tube channel device, and the inner diameter of the narrow tube channel device gradually decreases from the top to the bottom.

[0010] As an improvement, the narrow tube channel device is provided with an air inlet and an air outlet, the air inlet and the air outlet are provided with high-precision airflow sensors, the flow stabilizing grille is provided with an adjustment component, and the high-precision airflow sensor is electrically connected to the adjustment component.

[0011] As an improvement, the inner wall of the narrow tube channel device is made of ultra-high molecular weight polyethylene material.

[0012] As an improvement, the flow stabilizing grille includes a fixed grille and a rotating grille, the fixed grille and the rotating grille are rotatably connected, the fixed grille is fixedly arranged at the bottom of the narrow tube channel device, and the staggered angle between the fixed grille and the rotating grille forms an airflow channel.

[0013] As an improvement, a grille shaft is provided between the fixed grille and the rotating grille for connection, and the adjustment component includes an adjustment motor, which is arranged on the grille shaft.

[0014] As an improvement, a number of support frames are provided around the main body of the drone, a rotating shaft is rotatably provided on the support frame, the rotor is arranged on the rotating shaft, a rotating motor is fixed on the support frame, and the rotating motor is connected to the rotating shaft.

[0015] As an improvement, the high-precision airflow sensor is arranged on the grille axis and the rotating axis.

[0016] As an improvement, the narrow tube channel device is provided with an airflow control component, and the airflow control component is a guide vane.

[0017] As an improvement, the guide plate includes an upper guide plate and a lower guide plate, and the upper guide plate and the lower guide plate are evenly arranged on the outer wall of the narrow tube channel device. The cross-sectional area of ​​the lower guide plate is smaller than the cross-sectional area of ​​the upper guide plate, and the connecting line between the outer end of the upper guide plate and the outer end of the lower guide plate is parallel to the inclined line from the top to the bottom of the narrow tube channel device.

[0018] The advantages of the present invention are:

[0019] 1. The present invention accelerates the airflow generated by the rotor within the channel through the narrow tube effect of the narrow tube channel device. According to the principles of fluid mechanics, the increased flow rate can increase lift output, improve wind energy utilization efficiency compared to traditional UAVs, extend flight time, improve load capacity, and significantly optimize the UAV's power performance.

[0020] 2. The flow-stabilizing grille in this invention streamlines airflow and reduces turbulence. Combined with high-precision airflow sensors and dynamic control components, it can respond to airflow fluctuations in real time, reducing drone turbulence. This improves flight stability in complex airflow environments, reduces jitter in aerial photography, and minimizes cargo sway during logistics transport.

[0021] 3. The ultra-high molecular weight polyethylene inner wall of the present invention reduces airflow friction loss, the guide vanes enhance the airflow convergence effect, and the overall structure conforms to the aerodynamic design, further reducing flight resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a top view of the structure of a UAV based on the narrow tube effect in Example 1.

[0023] Figure 2 This is a bottom-up structural diagram of a UAV based on the narrow tube effect in Example 1.

[0024] Figure 3 This is a top view of a UAV based on the narrow tube effect in Example 1.

[0025] Figure 4 This is a bottom view of a UAV based on the narrow tube effect in Example 1.

[0026] Figure 5 This is an exploded structural diagram of the flow stabilizing grid in Example 1.

[0027] The symbols in the figure are:

[0028] 1. UAV body; 2. Narrow channel device; 3. Rotor; 4. Flow stabilizing grid; 5. Support frame; 6. Fixed grid;

[0029] 7. Rotating grille; 8. Grille shaft; 9. Adjusting motor; 10. Rotating shaft; 11. Rotating motor; 12. Upper guide vane;

[0030] 13. Lower guide vane. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0032] In the description of the embodiments of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the product of the invention is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it should not be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and should not be understood as indicating or implying relative importance.

[0033] Furthermore, the use of terms such as "horizontal," "vertical," and "overhanging" does not necessarily imply that the component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0034] In the description of the embodiments of the present invention, "a plurality of" means at least two.

[0035] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0036] The present invention is described in detail and specifically below through specific examples to provide a better understanding of the present invention. However, the following examples do not limit the scope of protection of the present invention.

[0037] Example 1

[0038] This embodiment discloses a UAV based on the narrow tube effect.

[0039] like Figures 1 to 5As shown, this embodiment includes a drone body 1 and a narrow tube channel device 2. The structural design of the narrow tube channel device 2 realizes airflow acceleration and stabilization, thereby improving the flight performance of the drone.

[0040] Main structure

[0041] Drone body 1: This core component houses several rotors 3 (typically 4-6, symmetrically distributed) that provide lift. It also integrates core components like the flight control system and powertrain to ensure proper flight.

[0042] Narrow channel devices 2: Several narrow channel devices 2 are evenly distributed around the drone body 1 (corresponding one to each rotor 3). Their tops surround the rotors 3, and their bottoms are located below them, forming a channel structure that envelops the airflow around the rotors 3. The inner diameter of these narrow channel devices 2 gradually decreases from top to bottom (forming a funnel shape), utilizing the narrow channel effect to accelerate the airflow within the channel and increase its kinetic energy.

[0043] Airflow control structure

[0044] Flow Stabilizer Grid 4: Flow stabilizer grid 4 is installed at the bottom of the narrow tube channel device 2 to organize the accelerated airflow, reduce turbulence, and enhance airflow stability. Flow stabilizer grid 4 comprises a fixed grid 6 and a rotating grid 7. Fixed grid 6 is fixed to the bottom of the narrow tube channel device 2. Rotating grid 7 and fixed grid 6 are rotatably connected via a grid shaft 8. The staggered angle between the two forms an airflow channel. Adjusting the staggered angle can change the cross-sectional area of ​​the airflow channel, thereby adjusting the airflow velocity.

[0045] Adjustment component: The flow stabilizing grid 4 is provided with an adjustment component, including an adjustment motor 9. The adjustment motor 9 is arranged on the grid shaft 8 and can drive the rotating grid 7 to rotate relative to the fixed grid 6, thereby adjusting the stagger angle.

[0046] Airflow Sensors and Control: The narrow channel device 2 is equipped with an air inlet (the top opening corresponding to the rotor 3) and an air outlet (the bottom opening connected to the flow stabilization grille 4). High-precision airflow sensors are installed at each inlet and outlet to monitor parameters such as airflow velocity and pressure within the channel in real time. These high-precision airflow sensors are electrically connected to the adjustment component (adjustment motor 9). The flight control system controls the adjustment motor 9 based on the sensor data, dynamically adjusting the airflow path of the flow stabilization grille 4 to optimize airflow conditions.

[0047] Materials and auxiliary structures

[0048] Inner wall material: The inner wall of the narrow tube channel device 2 is made of ultra-high molecular weight polyethylene material, which has a low friction coefficient and high wear resistance, can reduce the friction loss of the airflow in the channel and improve the fluidity of the airflow.

[0049] Airflow Control Assembly: The narrow tube channel device 2 is equipped with guide vanes (airflow control assembly), including upper guide vanes 12 and lower guide vanes 13, both evenly arranged on the outer wall of the narrow tube channel device 2. The cross-sectional area of ​​the lower guide vane 13 is smaller than that of the upper guide vane 12, and the line connecting the outer ends of the upper guide vane 12 and the lower guide vane 13 is parallel to the inclined line from the top to the bottom of the narrow tube channel device 2. This guides external airflow into the channel and enhances the airflow convergence effect.

[0050] Rotor 3 Drive Structure: The drone body 1 is surrounded by several support frames 5, each rotatably provided with a rotational shaft 10. The rotor 3 is mounted on this shaft. A rotary motor 11 is fixed to the support frames 5 and connected to the rotational shaft 10, providing rotational power for the rotor 3. High-precision airflow sensors are installed on the grille shaft 8 and the rotational shaft 10 to comprehensively monitor the airflow and the operating status of the rotor 3.

[0051] How it works

[0052] During flight, the rotating motor 11 drives the rotors 3, generating a downward airflow that enters the narrow channel device 2 (top air inlet). Because the inner diameter of the narrow channel device 2 gradually decreases from top to bottom, the narrow channel effect (fluid continuity principle and Bernoulli principle) causes the airflow velocity to increase within the channel, boosting kinetic energy and improving wind energy utilization efficiency.

[0053] During flight, high-precision airflow sensors at the inlet and outlet monitor airflow velocity, pressure, and other parameters in real time, transmitting this data to the flight control system. When airflow becomes unstable or lift adjustment is required, the control system activates the adjustment assembly (adjustment motor 9), rotating the rotating grille 7 of the flow stabilization grille 4 relative to the fixed grille 6, changing the staggered angle of the airflow channel and thereby adjusting airflow velocity and stability. Guide vanes on the outer wall guide external airflow into the auxiliary channel, further enhancing the airflow convergence effect.

[0054] The inner wall of ultra-high molecular weight polyethylene material reduces airflow friction loss and ensures efficient acceleration of airflow; the narrow tube channel device 2 also replaces the traditional bracket, reducing the weight of the fuselage while avoiding airflow interference and improving flight stability.

[0055] While the specific embodiments of the present invention have been described in detail above, they are merely exemplary, and the present invention is not equivalent to the specific embodiments described above. For those skilled in the art, any equivalent modifications and substitutions of the present invention are also within the scope of the present invention. Therefore, equivalent changes and modifications made without departing from the spirit and scope of the present invention are intended to be encompassed within the scope of the present invention.

Claims

1. A UAV based on the narrow tube effect, characterized in that: The invention comprises an unmanned aerial vehicle (UAV) body (1) and a narrow tube channel device (2), wherein a plurality of the narrow tube channel devices (2) are evenly arranged around the UAV body (1), a plurality of rotors (3) are provided on the UAV body (1), the tops of the narrow tube channel devices (2) surround the rotors (3), and the narrow tube channel devices (2) are located below the rotors (3); A flow stabilizing grid (4) is provided at the bottom of the narrow tube channel device (2), and the inner diameter of the narrow tube channel device (2) gradually decreases from the top to the bottom.

2. The UAV based on the narrow tube effect according to claim 1, characterized in that: The narrow tube channel device (2) is provided with an air inlet and an air outlet, and the air inlet and the air outlet are provided with high-precision airflow sensors. The flow stabilizing grille (4) is provided with an adjustment component, and the high-precision airflow sensor is electrically connected to the adjustment component.

3. The UAV based on the narrow tube effect according to claim 1, characterized in that: The inner wall of the narrow tube channel device (2) is made of ultra-high molecular weight polyethylene material.

4. The UAV based on the narrow tube effect according to claim 2, characterized in that: The flow stabilizing grille (4) comprises a fixed grille (6) and a rotating grille (7), wherein the fixed grille (6) and the rotating grille (7) are rotatably connected, and the fixed grille (6) is fixedly arranged at the bottom of the narrow tube channel device (2), and the staggered angle between the fixed grille (6) and the rotating grille (7) forms an air flow channel.

5. The UAV based on the narrow tube effect according to claim 4, characterized in that: A grid shaft (8) is provided between the fixed grid (6) and the rotating grid (7) for connection. The adjustment component comprises an adjustment motor (9), and the adjustment motor (9) is arranged on the grid shaft (8).

6. The UAV based on the narrow tube effect according to claim 5, characterized in that: A plurality of support frames (5) are provided around the drone body (1); a rotating shaft (10) is rotatably provided on the support frame (5); the rotor (3) is arranged on the rotating shaft (10); a rotating motor (11) is fixedly provided on the support frame (5); and the rotating motor (11) is connected to the rotating shaft (10).

7. The UAV based on the narrow tube effect according to claim 6, characterized in that: The high-precision airflow sensor is arranged on the grille shaft (8) and the rotating shaft (10).

8. The UAV based on the narrow tube effect according to claim 1, characterized in that: The narrow tube channel device (2) is provided with an airflow control component, and the airflow control component is a guide vane.

9. The UAV based on the narrow tube effect according to claim 8, characterized in that: The guide plate comprises an upper guide plate (12) and a lower guide plate (13), the upper guide plate (12) and the lower guide plate (13) being evenly arranged on the outer wall of the narrow tube channel device (2), the cross-sectional area of ​​the lower guide plate (13) being smaller than the cross-sectional area of ​​the upper guide plate (12), and the connecting line between the outer end of the upper guide plate (12) and the outer end of the lower guide plate (13) being parallel to the inclined line from the top to the bottom of the narrow tube channel device (2).

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