A wing lift enhancement device under post-stall conditions

Abstract

This invention discloses a wing lift enhancement device under post-stall conditions, relating to the field of wings. It includes a lift-enhancing winglet device, a wing supplementary surface device, a motor, and a linkage device. The lift-enhancing winglet device is directly connected to the motor and linkage device to achieve rotation of the lift-enhancing winglet device driven by the motor and linkage device. The wing supplementary surface device is a relatively independent device used to fill the gap left on the main wing surface after the lift-enhancing winglet device opens. The lift-enhancing winglet device, wing supplementary surface device, motor, and linkage device are fixed to the wing via auxiliary fixing ribs to achieve fixation of the entire lift enhancement device on the wing. The wing lift enhancement device disclosed in this invention has a simple structure and light weight. It mainly uses a servo motor to control the opening angle and closing of the lift enhancement device, resulting in high control reliability and occupying fewer flight control channels.

Description

Technical Field

[0001] This invention relates to the field of wings, and more particularly to a wing lift enhancement device under post-stall conditions. Background Technology

[0002] In recent years, drone technology has developed rapidly. One of the more efficient modes of locomotion is flapping-wing flight. Compared to common propeller and turbojet engine propulsion systems, it is energy-efficient, has high thrust, high efficiency, and long endurance. Some existing flapping-wing aircraft on the market can even mimic the shape of real birds, blending seamlessly into flocks. Due to their high efficiency, energy saving, long endurance, and good camouflage, biomimetic flapping-wing aircraft have broad application prospects in future military applications, long-distance cargo transport, and terrain mapping. However, current flapping-wing aircraft also have significant problems, including: 1. Inability to maintain stable flight at large angles of attack like birds; 2. Small stall angle of attack; 3. Increased difficulty in control and poor stability as the aircraft approaches stall; 4. A longer runway buffer period during landing, unlike birds which can utilize high angles of attack for sudden stops or short landings.

[0003] Therefore, those skilled in the art are dedicated to developing a wing lift enhancement device for post-stall conditions. Summary of the Invention

[0004] The purpose of this invention is to provide a wing lift enhancement device to solve at least one of the technical problems in the prior art.

[0005] To achieve the above objectives, the present invention provides a wing lift enhancement device, comprising a lift-enhancing winglet device, a wing supplementary surface device, a motor, and a linkage device; the lift-enhancing winglet device is directly connected to the motor and linkage device to achieve rotation of the lift-enhancing winglet device driven by the motor and linkage device; the wing supplementary surface device is a relatively independent device used to fill the gap left on the main wing surface after the lift-enhancing winglet device is opened; the lift-enhancing winglet device, the wing supplementary surface device, the motor, and the linkage device are fixed together with the wing by auxiliary fixing ribs to achieve fixation of the entire lift enhancement device on the wing.

[0006] Furthermore, the lifting winglet device includes: a lifting winglet, a lifting device fixing device, and a lifting device rotating shaft; the lifting device fixing device and the drive motor fixing device are fixed together, and the lifting winglet as a whole passes through the lifting device rotating shaft, and uses it as an axis to realize the fixed-axis rotation of the lifting winglet.

[0007] Furthermore, the lifting device fixing device has small holes, the position and size of which correspond to the small holes on the drive motor fixing device. The lifting device shaft passes through the two small holes in sequence to fix the lifting device shaft.

[0008] Furthermore, the wing supplementary surface device includes: a wing supplementary surface, a small compression spring, and a fixed base; the fixed base and an auxiliary fixing rib are connected together to provide a support plane for the small compression spring; the small compression spring is installed between the fixed base and the wing supplementary surface to realize the rebound of the wing supplementary surface.

[0009] Furthermore, the motor and linkage device includes: a drive motor and a servo arm, wherein the drive motor is adapted to drive the servo arm to rotate.

[0010] Furthermore, the drive motor is a small 9g drive motor.

[0011] Furthermore, the motor and linkage device also includes a drive motor linkage, and the servo arm and the drive motor linkage are connected together by pins and buckles, allowing relative rotation between them.

[0012] Furthermore, the motor and linkage device also includes a lifting device linkage. The drive motor linkage and the lifting device linkage are connected together by pins and buckles, and they can rotate relative to each other to achieve fixed-axis rotation of the lifting device wing driven by the motor and transmitted through the linkage.

[0013] Furthermore, the drive voltage of the servo motor is 4.8V-6V, and the drive torque is 1.8kg-2.2kg.

[0014] Furthermore, the servo arm, drive motor connecting rod, and lifting device connecting rod are all fixed and installed using M3 bolts and nuts.

[0015] The wing lift enhancement device provided by this invention has at least the following beneficial effects:

[0016] 1. It has a simple structure and light weight. It mainly uses a servo motor to control the opening angle and closing of the lift enhancement device, which has high control reliability and occupies few flight control channels.

[0017] 2. When the lift enhancement device is activated, it can generate a downwash from the lift enhancement device to the upper surface of the wing, and can promote the fusion of leading-edge vortices and wingtip vortices, thereby helping to delay the airflow separation on the upper surface of the aircraft and increase the aircraft's stall angle of attack.

[0018] 3. During aircraft landing, the lift enhancement device can be activated by servo control, generating additional lift and reducing the aircraft's taxiing distance, thus enabling short-distance taxiing landing.

[0019] The following will further explain the concept, specific structure, and technical effects of the present invention in conjunction with the accompanying drawings, so as to fully understand the purpose, features, and effects of the present invention. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the wing lift enhancement device in an embodiment of the present invention.

[0021] Explanation of reference numerals in the attached drawings: 1. Drive motor; 2. Drive motor mounting device; 3. Auxiliary mounting rib; 4. Servo arm; 5. Drive motor connecting rod; 6. Lifting device connecting rod; 7. Lifting device mounting device; 8. Lifting device shaft. Detailed Implementation

[0022] The following description, with reference to the accompanying drawings, illustrates several preferred embodiments of the present invention to make its technical content clearer and easier to understand. The present invention can be embodied in many different forms, and the scope of protection of the present invention is not limited to the embodiments mentioned herein.

[0023] In the accompanying drawings, components with the same structure are indicated by the same numerical designation, and components with similar structures or functions are indicated by similar numerical designations. The dimensions and thicknesses of each component shown in the drawings are arbitrary, and the present invention does not limit the dimensions and thicknesses of each component. To make the illustrations clearer, the thickness of some components has been appropriately exaggerated in the drawings.

[0024] like Figure 1 As shown, an embodiment of the present invention provides a wing lift enhancement device under post-stall conditions, including a lift-enhancing winglet device, a wing supplementary surface device, a motor, and a linkage device.

[0025] The lift-enhancing winglet device, motor, and linkage mechanism include: a drive motor 1, a servo arm 4, a drive motor linkage 5, a lift-enhancing device linkage 6, a lift-enhancing device winglet, a lift-enhancing device fixing device 7, and a lift-enhancing device rotating shaft 8. In the embodiment, the servo arm 4, drive motor linkage 5, and lift-enhancing device linkage 6 form a linkage mechanism. The lift-enhancing device linkage 6 is coupled to the lift-enhancing device rotating shaft 8. The lift-enhancing device fixing device 7 is fixed to a plate, defining the orientation of the lift-enhancing device rotating shaft 8, and the lift-enhancing device winglet is fixed to the rotating shaft 8. In the embodiment, the drive motor 1 drives the servo arm 4 to rotate, with a servo drive voltage of 4.8V-6V and a drive torque of 1.8kg-2.2kg. The rotation of the servo arm 4 drives the drive motor linkage 5 and the lift-enhancing device linkage 6 to rotate. The lift-enhancing device linkage 6 provides torque to the rotating shaft 8, which is fixed to the winglet, ultimately driving the lift-enhancing device winglet to rotate.

[0026] The wing supplementary surface device includes: a wing supplementary surface, a small compression spring, and a fixed base. The wing supplementary surface device assists in adjusting the aircraft's angle of attack. Before the aircraft flies at a low angle of attack, when the lift-enhancing winglet is not deployed, the wing supplementary surface is located below the lift-enhancing winglet, with its upper surface in contact with the lower surface of the lift-enhancing winglet. The lift-enhancing winglet indirectly compresses the small compression spring by applying pressure to the wing supplementary surface. When the lift-enhancing winglet is deployed and rotated upwards at a certain angle, the wing supplementary surface below the winglet separates. At this point, the wing supplementary surface bounces upwards a distance due to the elastic force of the small compression spring until the wing supplementary surface and the lift-enhancing winglet re-contact. This effectively fills the gaps in the wing caused by the deployment of the lift-enhancing winglet.

[0027] In this embodiment, the drive motor fixing device 2 and the auxiliary fixing rib 3, as well as the drive motor fixing device 2 and the lifting device fixing device 7, are all fixed and installed using M3 screws. The servo arm 4, the drive motor connecting rod 5, and the lifting device connecting rod 6 are all fixed and installed using M3 bolts and nuts.

[0028] The wing lift enhancement device under post-stall conditions provided in this embodiment has the following beneficial effects:

[0029] 1. It has a simple structure and light weight. It mainly uses a servo motor to control the opening angle and closing of the lift enhancement device, which has high control reliability and occupies few flight control channels.

[0030] 2. When the lift enhancement device is activated, it can generate a downwash from the lift enhancement device to the upper surface of the wing, and can promote the fusion of leading-edge vortices and wingtip vortices, thereby helping to delay the airflow separation on the upper surface of the aircraft and increase the aircraft's stall angle of attack.

[0031] 3. During aircraft landing, the lift enhancement device can be activated by servo control, generating additional lift and reducing the aircraft's taxiing distance, thus enabling short-distance taxiing landing.

[0032] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A wing high-lift device, characterized in that, It includes a lift-enhancing winglet device, a wing supplementary surface device, a motor, and a linkage device. The lift-enhancing winglet device is directly connected to the motor and linkage device to enable the rotation of the lift-enhancing winglet device driven by the motor and linkage device. The wing supplementary surface device is a relatively independent device used to fill the gap left on the main wing surface after the lift-enhancing winglet device is deployed. The lift-enhancing winglet device, the wing supplementary surface device, the motor, and the linkage device are fixed to the wing through auxiliary fixing ribs to achieve the fixation of the entire lift enhancement device on the wing. The lifting winglet device includes: a lifting winglet, a lifting device fixing device, and a lifting device rotating shaft; the lifting device fixing device and the drive motor fixing device are fixed together, and the lifting winglet passes through the lifting device rotating shaft as a whole, and uses it as an axis to realize the fixed-axis rotation of the lifting winglet. The wing supplementary surface device includes: a wing supplementary surface, a small compression spring, and a fixed base; the fixed base and an auxiliary fixing rib are connected together to provide a support plane for the small compression spring; the small compression spring is installed between the fixed base and the wing supplementary surface to realize the rebound of the wing supplementary surface; When the lift-enhancing device winglet is not deployed, the wing supplementary surface is located below the lift-enhancing device winglet, with the upper surface of the wing supplementary surface in contact with the lower surface of the lift-enhancing device winglet. The lift-enhancing device winglet indirectly compresses the small compression spring by applying pressure to the wing supplementary surface. When the lift-enhancing device winglet is deployed and rotated upwards at a certain angle, the lift-enhancing device winglet separates from the wing supplementary surface. Due to the elastic force of the small compression spring, the wing supplementary surface bounces upwards a certain distance until the wing supplementary surface and the lift-enhancing device winglet re-contact. The motor and linkage device includes: a drive motor, a servo arm, a drive motor linkage, and a lift-enhancing device linkage. The drive motor is adapted to drive the servo arm to rotate. The servo arm and the drive motor linkage are connected together by pins and clips, allowing relative rotation between them. The drive motor linkage and the lift-enhancing device linkage are connected together by pins and clips, allowing relative rotation between them, so as to realize the fixed-axis rotation of the lift-enhancing device winglet driven by the motor and transmitted through the linkage.

2. The wing lift enhancer of claim 1, wherein The lifting device fixing device has small holes, the position and size of which correspond to the small holes on the drive motor fixing device. The lifting device shaft passes through the two small holes in sequence to fix the lifting device shaft.

3. The wing high-lift device of claim 1, wherein, The drive motor is a small 9g drive motor.

4. The wing high-lift device of claim 1, wherein, The servo motor has a driving voltage of 4.8V-6V and a driving torque of 1.8kg-2.2kg.

5. The wing lift enhancer of claim 3, wherein, The servo arm, drive motor connecting rod, and lifting device connecting rod are all fixed and installed using M3 bolts and nuts.

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