Coaxial double-propeller single-duct type wing body fusion vertical take-off and landing aircraft

Abstract

The utility model relates to a coaxial double-propeller single duct type wing body fusion vertical take-off and landing aircraft, which comprises an aircraft body, an empennage, side wings, an air inlet duct, wingtip winglets, a ducted fan and an undercarriage, the aircraft adopts a wing body fusion layout, the ducted fan is detachably arranged below the aircraft body through screws, and the ducted fan comprises a jet flow cylinder, a forward rotation motor and a reverse rotation motor. One ends of the undercarriages on the two sides are fixed to the outer wall of a jet flow cylinder of the ducted fan through screws, the other ends of the undercarriages are grounded, the air inlet channel is arranged on the upper surface of the fuselage, and the air inlet channel and the ducted fan are both communicated with the fuselage. Airflow jetted downwards is used as power, upward lifting force can be provided for the fuselage, so that the fuselage can vertically take off and land, the stability of the fuselage in the take-off and landing process is effectively improved, the overall stability of the aircraft is improved, meanwhile, the limitation in the use process is reduced, and the aircraft is convenient to use. And the difficulty of operating the aircraft by an aircraft user is reduced.

Description

Technical Field

[0001] This utility model relates to the field of aircraft technology, specifically to a coaxial twin-propeller single-duct wing-body blended vertical takeoff and landing aircraft. Background Art

[0002] With the rapid development of the aviation industry, aircraft on the market are becoming increasingly advanced and diverse. To improve the aerodynamic characteristics of aircraft, manufacturers need to continuously improve their lift-enhancing capabilities.

[0003] Existing aircraft require auxiliary propulsion or takeoff via a runway. The former can easily cause significant swaying within a short period, while the latter requires a long runway. Therefore, the choice of takeoff and landing sites is limited, increasing limitations in use and placing higher demands on the pilot's skill level. To address this, a coaxial twin-propeller, single-ducted wing-body blended vertical takeoff and landing (VTOL) aircraft is proposed. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention aims to provide a coaxial twin-propeller single-duct wing-body blended vertical takeoff and landing (VTOL) aircraft. Through the coordinated operation of the jet tube, reversible motors, and propellers, the aircraft utilizes downward-jetting airflow as propulsion to provide upward lift to the fuselage, enabling vertical takeoff and landing. This effectively improves the stability of the aircraft during takeoff and landing. In this way, users can take off without the need for auxiliary means such as boosters or runway maneuvers, improving the overall stability of the aircraft while reducing limitations during use and lowering the difficulty of operating the aircraft.

[0005] This utility model is achieved through the following technical solution.

[0006] A coaxial twin-propeller single-ducted blended wing-body vertical takeoff and landing aircraft includes a fuselage, tail, side wings, air intakes, winglets, ducted fans, and landing gear. The aircraft adopts a blended wing-body layout. The ducted fan is detachably mounted on the underside of the fuselage by screws. The ducted fan includes a jet tube, a forward motor, and a reverse motor. One end of the landing gear on each side is fixed to the outer wall of the jet tube of the ducted fan by screws, and the other end of the landing gear touches the ground. The air intake is located on the upper surface of the fuselage. Both the air intake and the ducted fan are connected to the fuselage. Outside air enters the upper part of the ducted fan through the air intake and the fuselage, and is then ejected from the lower part of the ducted fan. The forward motor is equipped with a forward propeller, and the reverse motor is equipped with a reverse propeller. The forward and reverse motors are coaxial, thus forming a coaxial twin-propeller. Ducted fans provide a unidirectional channel for the jet airflow. When the forward and reverse rotor motors rotate simultaneously at the same speed, the torque generated by the rotation of the forward and reverse rotors balances each other, preventing the fuselage from being subjected to torque and eliminating the aircraft's spin. Simultaneously, the thrust generated by both rotors is directed directly downwards, enabling the aircraft to achieve vertical takeoff and landing.

[0007] Furthermore, the ducted fan is fixed to the bottom of the casing by four ducted screws. Four fan-shaped holes are opened at the contact point between the ducted fan's nozzle and the lower surface of the casing. A circular hole with the same inner diameter as the nozzle is opened at the point where the lower surface of the casing is directly opposite to the inner diameter of the nozzle, so as to achieve the purpose of direct communication between the inside of the ducted fan and the inside of the casing.

[0008] Furthermore, the air intake is semi-elliptical in shape, allowing outside air to communicate with the fuselage interior. The fuselage interior is also connected to the ducted fan interior, further enabling outside air to flow into the ducted fan. The ducted fan can draw air from the air intake through the fuselage interior, providing an air supply for the duct.

[0009] Furthermore, the landing gear includes a balance frame detachably mounted on both sides of the outer surface of the jet tube. Each end of the outer wall of the balance frame has a bracket for supporting the fuselage. The bracket and the balance frame are rotatably connected via a balance bar. The landing gear is used to absorb shocks to the fuselage during landing.

[0010] Furthermore, a fixing block is fixedly installed on the outer surface of the balance frame at the support position. The support and the fixing block are elastically connected by a tension spring. A first telescopic airbag is installed on the outer surface of the fixing block at the tension spring position to stabilize the support during the swinging process.

[0011] Furthermore, one end of the first telescopic airbag is connected to the fixed block, and the other end of the first telescopic airbag is connected to the bracket. A hole is provided through the outer surface of the first telescopic airbag for deflating and storing air.

[0012] Furthermore, the landing gear also includes a sleeve fixedly installed at the bottom of the support. A support rod is slidably arranged inside the sleeve, and a buffer pad is provided at the middle of the bottom end of the support rod. A second telescopic airbag is slidably arranged inside the sleeve, and a return spring is provided inside the second telescopic airbag for resetting the compressed second telescopic airbag.

[0013] Furthermore, the top end of the second telescopic airbag is connected to the top end of the inner surface of the sleeve, and the bottom end of the second telescopic airbag is connected to the bottom end of the support rod. An air guide tube is provided at the top end of the second telescopic airbag for deflating and storing air in the second telescopic airbag. The inner cavity of the air guide tube is connected to the inner cavity of the second telescopic airbag. The top end of the air guide tube penetrates the top end of the inner surface of the sleeve and extends to the outside of the sleeve. The fixing block, balance bar, bracket, and support rod are all hollow structures.

[0014] Furthermore, the bottom end of the jet tube is provided with a slope to guide the jetting airflow, and the slope is designed with an arc shape.

[0015] Compared with the prior art, the advantages of this utility model are:

[0016] I. This utility model utilizes the combined action of a jet tube, a reversible motor, and a propeller to provide upward lift to the fuselage by using downward-jetting airflow as power, enabling the fuselage to take off and land vertically. This effectively improves the stability of the fuselage during takeoff and landing. Through this method, users can take off without the need for auxiliary means or a runway approach, improving the overall stability of the aircraft while reducing limitations in use and lowering the difficulty for users to operate the aircraft.

[0017] Second, this utility model can effectively dampen the fuselage during landing by using the landing gear, reduce the impact force generated during landing, reduce the possibility of damage to internal components of the aircraft, and improve the overall service life of the aircraft. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a side view of the overall structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the ducted fan structure of this utility model;

[0021] Figure 4 This is a schematic cross-sectional view of the ducted fan of this utility model.

[0022] Figure 5 This is a schematic diagram of the landing gear structure of this utility model.

[0023] Attached diagram labels: 1. Fuselage; 2. Tail fin; 3. Side fin; 4. Air intake; 5. Winglet; 6. Ducted fan; 7. Jet tube; 8. Forward motor; 9. Propeller; 10. Reverse motor; 11. Reverse propeller; 12. Duct bolt; 13. Balancer bolt hole; 14. Landing gear; 15. Balancer; 16. Balancer bolt; 17. Fixing block; 18. Tension spring; 19. First telescopic airbag; 20. Stabilizer bar; 21. Bracket; 22. Sleeve; 23. Second telescopic airbag; 24. Return spring; 25. Support rod; 26. Buffer pad; 27. Air duct. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0025] like Figures 1 to 5 As shown, a coaxial twin-propeller single-ducted blended wing-body vertical takeoff and landing aircraft includes a fuselage 1, a tail 2, side wings 3, an air intake 4, winglets 5, a ducted fan 6, and landing gear 14. The aircraft adopts a blended wing-body layout. The ducted fan 6 is detachably mounted on the underside of the fuselage 1 by screws. The ducted fan 6 includes a jet tube 7, a forward motor 8, and a reverse motor 10. One end of the landing gear 14 on both sides is fixed to the outer wall of the jet tube 7 of the ducted fan 6 by screws, and the other end of the landing gear 14 touches the ground. The air intake 4 is located on the upper surface of the fuselage 1. Both the air intake 4 and the ducted fan 6 are connected to the fuselage 1. Outside air enters the upper part of the ducted fan 6 through the air intake 4 and the fuselage 1, and is then ejected from the lower part of the ducted fan 6. The forward motor 8 is equipped with a forward rotor 9, and the reverse motor 10 is equipped with a reverse rotor 11. The forward motor 8 and the reverse motor 10 are coaxial, thus forming a coaxial twin-propeller. The ducted fan 6 provides a unidirectional channel for the jet airflow. When the forward motor 8 and the reverse motor 10 rotate simultaneously at the same speed, the torque generated by the rotation of the forward propeller 9 and the reverse propeller 11 balances each other, so that the fuselage 1 is not subjected to torque, and the entire aircraft no longer produces a spin phenomenon. At the same time, the thrust generated by the forward propeller 9 and the reverse propeller 11 is directed directly downwards, enabling the entire aircraft to achieve the purpose of vertical take-off and landing.

[0026] Furthermore, the ducted fan 6 is fixed to the bottom of the body 1 by four ducted screws 12. Four fan-shaped holes are opened at the contact point between the jet tube 7 of the ducted fan 6 and the lower surface of the body 1. A circular hole with the same inner diameter as the jet tube 7 is opened at the position where the lower surface of the body 1 is directly opposite to the inner diameter of the jet tube 7, so as to achieve the purpose of direct communication between the interior of the ducted fan 6 and the interior of the body 1.

[0027] Furthermore, the inlet of the air intake 4 is semi-elliptical, achieving the purpose of connecting the outside air with the interior of the fuselage 1. The interior of the fuselage 1 is also connected to the interior of the ducted fan 6, thus further achieving the purpose of connecting the outside air with the interior of the ducted fan 6. The ducted fan 6 can draw in air from the air intake 4 through the interior of the fuselage 1, providing an air intake source for the duct.

[0028] Furthermore, the landing gear 14 includes a balance frame 15 detachably mounted on both sides of the outer surface of the jet tube 7. Each end of the outer wall of the balance frame 15 is provided with a bracket 21 for supporting the fuselage 1. The bracket 21 and the balance frame 15 are rotatably connected via a balance bar 20. The landing gear 14 is used to dampen the fuselage during landing.

[0029] Furthermore, a fixing block 17 is fixedly installed on the outer surface of the balance frame 15 at the position of the support 21. The support 21 and the fixing block 17 are elastically connected by a tension spring 18. A first telescopic airbag 19 is installed on the outer surface of the fixing block 17 at the position of the tension spring 18 to stabilize the support 21 during the swinging process.

[0030] Furthermore, one end of the first telescopic airbag 19 is connected to the fixing block 17, and the other end of the first telescopic airbag 19 is connected to the bracket 21. A hole is provided through the outer surface of the first telescopic airbag 19 for deflating and storing air.

[0031] Furthermore, the landing gear 14 also includes a sleeve 22 fixedly installed at the bottom of the bracket 21. A support rod 25 is slidably arranged inside the sleeve 22. A buffer pad 26 is provided at the middle of the bottom end of the support rod 25. A second telescopic airbag 23 is slidably arranged inside the sleeve 22. A return spring 24 is provided inside the second telescopic airbag 23 for resetting the compressed second telescopic airbag 23.

[0032] Furthermore, the top end of the second telescopic airbag 23 is connected to the top end of the inner surface of the sleeve 22, and the bottom end of the second telescopic airbag 23 is connected to the bottom end of the support rod 25. The top end of the second telescopic airbag 23 is provided with an air guide tube 27 for deflating and storing air in the second telescopic airbag 23. The inner cavity of the air guide tube 27 is connected to the inner cavity of the second telescopic airbag 23. The top end of the air guide tube 27 penetrates the top end of the inner surface of the sleeve 22 and extends to the outside of the sleeve 22. The fixing block 17, the balance bar 20, the bracket 21, and the support rod 25 are all hollow structures.

[0033] Furthermore, the bottom end of the jet tube 7 is provided with a slope to guide the jetting airflow, and the slope is designed with an arc shape.

[0034] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A coaxial twin-propeller single-ducted blended wing-body vertical takeoff and landing aircraft, characterized in that, The aircraft includes a fuselage (1), tail (2), side wings (3), air intakes (4), winglets (5), ducted fans (6), and landing gear (14). The aircraft adopts a blended wing-body layout. The ducted fans (6) are detachably mounted on the underside of the fuselage (1) with screws. The ducted fans (6) include a jet tube (7), a forward motor (8), and a reverse motor (10). One end of the landing gear (14) on both sides is fixed to the outer wall of the jet tube (7) of the ducted fans (6) with screws. The other end of the landing gear (14) touches the ground. The air intake (4) is located on the upper surface of the fuselage (1). The air intake (4) and the ducted fan (6) are connected to the fuselage (1). Outside air enters the upper end of the ducted fan (6) through the air intake (4) and the fuselage (1), and is ejected from the lower end of the ducted fan (6). The forward motor (8) is equipped with a forward propeller (9), and the reverse motor (10) is equipped with a reverse propeller (11). The forward motor (8) and the reverse motor (10) are coaxial, thus forming a coaxial dual propeller.

2. The coaxial twin-propeller single-ducted blended wing-body vertical takeoff and landing aircraft according to claim 1, characterized in that, The ducted fan (6) is fixed to the bottom of the body (1) by four duct screws (12). The nozzle (7) of the ducted fan (6) has four fan-shaped holes at the contact point with the lower surface of the body (1). The lower surface of the body (1) has a circular hole with the same inner diameter as the nozzle (7) at the point where it is directly opposite to the inner diameter of the nozzle (7), so that the inside of the ducted fan (6) can be directly connected to the inside of the body (1).

3. The coaxial twin-propeller single-ducted blended wing-body vertical takeoff and landing aircraft according to claim 1, characterized in that, The air intake (4) has a semi-elliptical inlet, which enables the outside air to communicate with the interior of the fuselage (1).

4. The coaxial twin-propeller single-ducted blended wing-body vertical takeoff and landing aircraft according to claim 1, characterized in that, The landing gear (14) includes a balance frame (15) that can be detachably installed on both sides of the outer surface of the jet tube (7). The balance frame (15) has a bracket (21) at both ends of its outer wall for supporting the fuselage (1). The bracket (21) and the balance frame (15) are rotatably connected by a balance bar (20).

5. A coaxial twin-propeller single-ducted blended wing-body vertical takeoff and landing aircraft according to claim 4, characterized in that, The outer surface of the balance frame (15) is fixedly provided with a fixing block (17) at the position of the support (21). The support (21) and the fixing block (17) are elastically connected by a tension spring (18). The outer surface of the fixing block (17) is provided with a first telescopic airbag (19) at the position of the tension spring (18) to stabilize the support (21) during the swing process.

6. A coaxial twin-propeller single-ducted blended wing-body vertical takeoff and landing aircraft according to claim 5, characterized in that, One end of the first telescopic airbag (19) is connected to the fixing block (17), and the other end of the first telescopic airbag (19) is connected to the bracket (21). A hole is provided through the outer surface of the first telescopic airbag (19) for deflating and storing air.

7. A coaxial twin-propeller single-ducted blended wing-body vertical takeoff and landing aircraft according to claim 6, characterized in that, The landing gear (14) also includes a sleeve (22) fixedly installed at the bottom of the bracket (21). A support rod (25) is slidably arranged inside the sleeve (22). A buffer pad (26) is provided at the middle of the bottom end of the support rod (25). A second telescopic airbag (23) is slidably arranged inside the sleeve (22). A return spring (24) is provided inside the second telescopic airbag (23) for resetting the compressed second telescopic airbag (23).

8. A coaxial twin-propeller single-ducted blended wing-body vertical takeoff and landing aircraft according to claim 7, characterized in that, The top end of the second telescopic airbag (23) is connected to the top end of the inner surface of the sleeve (22), and the bottom end of the second telescopic airbag (23) is connected to the bottom end of the support rod (25). The top end of the second telescopic airbag (23) is provided with an air guide tube (27) for deflating and storing air in the second telescopic airbag (23). The inner cavity of the air guide tube (27) is connected to the inner cavity of the second telescopic airbag (23). The top end of the air guide tube (27) penetrates the top end of the inner surface of the sleeve (22) and extends to the outside of the sleeve (22). The fixing block (17), balance bar (20), bracket (21), and support rod (25) are all hollow structures.

9. A coaxial twin-propeller single-ducted blended wing-body vertical takeoff and landing aircraft according to claim 1, characterized in that, The bottom end of the jet tube (7) is provided with a slope to guide the jetting airflow. The slope is designed with an arc shape.

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