Paddle and fan integrated aviation propeller

Abstract

The invention provides a propeller and fan integrated aviation propeller. The propeller and fan integrated aviation propeller comprises a propeller and fan integrated assembly; the paddle and fan integrated assembly comprises a shell and a fan, the ducted fan is arranged in the shell; the propeller assembly is arranged on the peripheral wall of the shell; and the driving system is connected with the shell and used for driving the paddle and fan integrated assembly to rotate to generate composite thrust. The propeller and the ducted fan are effectively combined to form the propeller and fan integrated composite aero-engine, effective superposition of the thrust of the aero-engine is formed, the manufacturing process of the aero-engine is simplified, maximization of the aviation thrust is formed in an integrated mode, and the purpose of integrated manufacturing of the propeller and the ducted fan is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of aviation vehicles, and in particular, to an aviation propulsion device that combines a propeller and a fan in one. Background Art

[0002] In the field of aviation power, traditional commercial aircraft engines mainly rely on gas turbine core engines as power sources. Their operating principles are based on thermodynamics and rely on fossil fuels such as oil. This power model not only faces the challenge of environmental pollution, but is also limited by the sustainability of resources, making it difficult to adapt to the development needs of future green aviation.

[0003] As for the existing aviation thrust technology, one type is propellers and the other is ducted fan jets. In the state of low-speed flight (less than 600 kilometers per hour), the efficiency of propeller engines is relatively high, and for high-speed flight (subsonic and supersonic flight), it is necessary to rely on ducted fan jets, which is the main pattern of today's supersonic aircraft and commercial aviation engines. However, for traditional thermal aviation engines, it is difficult to combine the two into one. Because the scale of traditional thermal aviation engines is relatively large, generally more than one meter. Integrating the two into one will make the scale even larger, and the propeller will produce a shock wave effect when rotating at high speed, greatly reducing the efficiency of the engine. Therefore, the integration of propellers and fans is both technically difficult and unrealistic. For electric-driven aviation engines, the flexible design of motors can be used to achieve the integration of propellers and fans within a small and medium scale range. This is the purpose of this patent. Summary of the invention

[0004] In view of the defects in the prior art, the purpose of this application is to provide an aviation propulsion device that combines a propeller and a fan.

[0005] In one aspect of the present application, a propeller-fan integrated aviation propeller is provided, comprising:

[0006] Propeller-fan integrated assembly;

[0007] The propeller-fan integrated assembly comprises:

[0008] case;

[0009] a ducted fan disposed in the housing;

[0010] A propeller assembly is arranged on the outer peripheral wall of the housing;

[0011] A drive system is connected to the housing and is used to drive the propeller-fan assembly to rotate and generate compound thrust.

[0012] Further, the propeller assembly includes a plurality of propeller blades, and the plurality of propeller blades are evenly spaced and arranged on the outer peripheral wall of the housing;

[0013] The propeller blades and the housing are integrally formed or detachably connected.

[0014] Furthermore, the ducted fan comprises:

[0015] A duct is embedded in the shell and is integrally formed with the shell;

[0016] The fan is arranged in the duct, and the driving system drives the shell to rotate, thereby driving the duct and the fan to rotate.

[0017] Further, the drive system includes a rim drive motor, and the rim drive motor includes: an internal rotor and an external stator;

[0018] A rolling body is provided between the stator and the rotor;

[0019] The rotor is connected to the housing, and is used for driving the housing to rotate while the rotor rotates, thereby driving the propeller assembly and the ducted fan to rotate.

[0020] Furthermore, the diameter of the housing is the same as the diameter of the rotor.

[0021] Furthermore, it also includes a transmission device, which is arranged between the shell and the drive system and is used to drive the propeller-fan integrated assembly to rotate under the drive of the drive system to generate a compound thrust.

[0022] Furthermore, one end of the transmission device is connected to the rotor, and the other end is connected to the housing.

[0023] Furthermore, the transmission device is sleeved on the outer peripheral wall of the shell and is threadedly connected to the shell, and the diameter of the transmission device is the same as the diameter of the rotor.

[0024] Furthermore, the transmission device is a bearing.

[0025] Further, the wheel rim drive motor comprises a housing and a hollow structure located in the housing;

[0026] The ducted fan is arranged in the hollow structure of the rim drive motor, and the propeller assembly is installed on the outer shell. The rim drive motor drives the propeller assembly to rotate while driving the ducted fan to rotate, thereby generating additional thrust.

[0027] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0028] The present application realizes the integrated manufacturing of propellers and ducted fans by integrating the propeller assembly, drive system and transmission device, effectively combining the unique advantages of propellers and ducted fans to effectively superimpose the thrust of aircraft engines, thereby simplifying the aircraft engine manufacturing process, maximizing the aviation thrust in an integrated manner, and achieving the purpose of integrated manufacturing of propellers and ducted fans. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0030] Figure 1 This is a schematic diagram of the structure of an aviation propeller with a combined propeller and fan according to an embodiment of the present application.

[0031] Figure 2 This is a schematic diagram of the structure of an aviation propeller with a combined propeller and fan according to an embodiment of the present application.

[0032] Figure 3 Schematic diagram of the ducted fan structure according to an embodiment of the present application

[0033] Figure 4 This is a schematic diagram of the structure of another propeller-fan integrated aviation propulsion system according to an embodiment of the present application.

[0034] Figure 5 This is a schematic diagram of the structure of another propeller-fan integrated aviation propulsion system according to an embodiment of the present application.

[0035] Figure 6 This is a schematic structural diagram of a transmission device and propeller-fan integrated assembly according to one embodiment of the present application.

[0036] Figure 7 This is a schematic diagram of the structure of the rim drive according to an embodiment of the present application.

[0037] Figure 8 This is a performance effect diagram of an embodiment of the present application.

[0038] In the figure: 1. propeller-fan integrated assembly; 11. casing; 12. ducted fan; 121. duct; 122. fan; 13. propeller assembly; 131. propeller blades; 2. drive system; 21. rim drive motor; 211. stator; 212. rotor; 213. rolling element; 214. casing; 3. transmission device. DETAILED DESCRIPTION

[0039] The present application is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present application, but do not limit the present application in any form. It should be noted that, for those of ordinary skill in the art, several variations and improvements can also be made without departing from the concept of the present application. These all belong to the protection scope of the present application.

[0040] The present application proposes to effectively combine the unique advantages of the propeller assembly 13 and the ducted fan 12 to form an effective superposition of the thrust of the aircraft engine. By using an electric motor to drive the ducted fan 12 and the propeller assembly 13, the resistance caused by this cross-sectional area can be effectively avoided, thereby improving the thrust efficiency of the aircraft engine.

[0041] Reference Figure 1 to Figure 2 As shown, a propeller-fan integrated aviation propulsion device according to an embodiment of the present application includes: a propeller-fan integrated assembly 1, the propeller-fan integrated assembly 1 includes a shell 11; a ducted fan 12 is arranged in the shell 11; a propeller assembly 13 is arranged on the outer peripheral wall of the shell 11; a driving system 2 is connected to the shell 11, and is used to drive the propeller-fan integrated assembly 1 to rotate to generate a compound thrust.

[0042] The present invention effectively combines the unique advantages of the propeller assembly 13 and the ducted fan 12 to form an effective superposition of the aircraft engine thrust, simplifies the aircraft engine manufacturing process, maximizes the aircraft thrust in an integrated manner, and achieves the purpose of integrated manufacturing of the propeller and the ducted fan 12.

[0043] The housing 11 is a cylindrical housing.

[0044] Specifically, the propeller-fan integrated assembly 1 includes a cylindrical shell, and the ducted fan 12 is embedded in the interior of the cylindrical shell. The propeller assembly 13 is arranged on the inner wall of the cylindrical shell to realize the combination of the propeller assembly 13 and the ducted fan 12. Then the drive system 2 is used to drive the propeller-fan integrated assembly 1 to rotate. The thrust mode of the ducted fan 12 is to inhale air and then eject it from the tail to generate forward thrust. It follows the law of conservation of momentum; the propeller uses the reaction between the blades and the air to generate forward pulling force. It follows Newton's third law. The ducted fan 12 inside the shell 11 generates backward jet thrust, and the propeller assembly 13 generates forward pulling force. The propeller assembly 13 and the ducted fan 12 jointly generate a composite thrust.

[0045] In some possible embodiments, the propeller assembly 13 includes a plurality of propeller blades 131 that are evenly spaced apart on the outer peripheral wall of the housing 11 ; the propeller blades 131 are integrally formed with the housing 11 or are detachably connected.

[0046] It is composed of three propeller blades, and the root of the propeller blade 131 is connected to the outer wall of the shell 11. The shell 11 supports and fixes the propeller blade 131 and drives the propeller blade 131 to rotate, and also protects the internal duct fan 12. During the assembly, the propeller blade 131 and the shell 11 can be printed as one piece, or the propeller blade 131 and the shell 11 can be detachably connected.

[0047] In one specific implementation manner, 3D printing can be used to form an integrated structure of the propeller blades 131 and the shell 11. This method can be suitable for small sizes and can reduce labor and physical costs. Since the one-piece molding of parts reduces the steps and time required for assembly, the assembly cost and the manpower required in the assembly process can be reduced; the possibility of failure can be reduced. The integrated molding can reduce the connection points in the assembly process and can effectively avoid quality and reliability problems caused by poor contact; production efficiency can be improved and weight can be reduced. The integrated molding can improve production efficiency and there is no need to produce connectors that separate components. Therefore, the overall mass of the aircraft can be reduced to a certain extent; the appearance can be made more beautiful. The one-piece molding can reduce hidden seams and connection points to a certain extent, making the product appearance neater and more beautiful to a certain extent.

[0048] In another specific implementation, the propeller blades 131 are printed separately from the shell 11, and then the propeller blades 131 are assembled on the shell 11, and the propeller blades 131 and the shell 11 are connected by a mortise and tenon structure. This detachable method can facilitate maintenance and replacement. The propeller blades 131 are relatively easy to damage. If one propeller blade 131 fails, it must be completely replaced for the safety of the aircraft. If separate assembly is used, only this part needs to be replaced and repaired, which can effectively reduce the maintenance cost. In this way, the dynamic balance of the propeller blades 131 can also be adjusted autonomously. Each propeller blade 131 is stuck in the tenon groove of the turntable through the tenon. The propeller blades 131 are loosely installed. This installation allows each blade to be stuck in the tenon groove of the shell 11 through the tenon. There is still space between the tenon and the tenon groove, so that it can be leveled by itself during rotation. At the same time, this method can reduce vibration and noise. The root of the propeller blade 131 adopts a mortise and tenon structure, that is, a loose installation can effectively reduce the vibration of the propeller blade 131 during operation, thereby reducing the noise generated during the flight, and can improve the durability of the propeller blade 131. The blades with a mortise and tenon structure can have higher durability, which can effectively improve the ability of the propeller blade 131 to resist adverse environments and extend the service life of the propeller blade 131.

[0049] In summary, the propeller blades 131 can be folded, and the connection is sufficiently loose. The loose installation is more flexible in the installation of the propeller blades 131, and the installation of the propeller blades 131 itself can adjust the dynamic balance of the engine during rotation.

[0050] like Figure 2 and Figure 3As shown, in some possible embodiments, the ducted fan 12 includes: a duct 121, which is embedded in the shell 11 and formed integrally with the shell 11; a fan 122, which is arranged in the duct 121, and the driving system 2 drives the shell 11 to rotate, driving the duct 121 and the fan 122 to rotate.

[0051] Specifically, the duct 121 is a fan casing, which is embedded in the shell 11 and formed integrally with the shell 11. The fan 122 is arranged in the fan casing and fixed in the fan casing. When the fan casing rotates with the shell 11 driven by the drive system 2, the fan casing and the fan 122 are driven to rotate.

[0052] In the above embodiments, one specific implementation is that the duct 121 is fixed inside the housing 11 and can rotate with the housing 11, and the fan 122 is fixed inside the duct 121 and can rotate with the housing 11. Another specific implementation is that a part of the housing 11 forms the duct 121, the fan 122 is arranged inside the housing 11 near one end of the housing 11, the housing 11 supports and fixes the fan 122 and has a certain protective effect on it, and the propeller blade 131 is arranged near the other end of the housing 11 and can rotate with the housing 11 under the drive of the drive system 2.

[0053] In some possible embodiments, the drive system 2 includes a rim drive motor 21, and the rim drive motor 21 includes: an internal rotor 212 and an external stator 211; a rolling body 213 is provided between the stator 211 and the rotor 212; the rotor 212 is connected to the shell 11, and is used to drive the shell 11 to rotate while the rotor 212 rotates, thereby driving the propeller assembly 13 and the ducted fan 12 to rotate.

[0054] In the present application, the outside of the rim drive motor 21 is a stator 211, and the inside is a rotor 212, and there are a number of rolling bodies 213 between the two. The rolling bodies 213 play the role of rolling and transmitting force. The rotor 212 of the rim drive motor 21 is connected to one end of the shell 11 of the propeller-fan integrated component 1. When the rim drive motor 21 rotates, the rotor 212 is connected to the shell 11, driving the shell 11 to rotate, and the ducted fan 12 in the shell 11 rotates synchronously with the shell 11. At the same time, the propeller assembly 13 on the outer peripheral wall of the shell 11 rotates with the shell 11, and the propeller blades 131 provide airflow efficiency and suction capacity, thereby achieving the effect of propeller-fan integration.

[0055] In an embodiment in which a portion of the shell 11 forms a duct, the fan 122 is disposed inside the shell 11 near one end of the shell 11, and the propeller blades 131 are disposed near the other end of the shell 11. They can rotate along with the shell 11 under the drive of the drive system 2, and the fan 122 is disposed near one end of the rotor 212.

[0056] In some possible embodiments, the diameter of the housing 11 is the same as the diameter of the rotor 212 .

[0057] By setting the diameter of the shell 11 and the diameter of the rotor 212 to the same size, when the shell 11 is driven to rotate, the propeller assembly 13 and the ducted fan 12 cause the airflow to flow in different areas, a part of the cylindrical shell forms the duct of the propeller assembly 13, and the other part forms the duct 121 of the ducted fan 12, and the front and rear ducts are the same size, so the edges of the ducted fan 12 and the propeller assembly 13 overlap without causing too much loss to the oncoming airflow.

[0058] The present application effectively combines the unique advantages of the propeller assembly 13 and the ducted fan 12 to form an effective superposition of the thrust of the aircraft engine. The two are effectively combined into one to form a thrust pattern of the propeller fan. It should be pointed out that this reasoning pattern is most suitable for electric aircraft engines, because the overall scale is within one meter, and the advantages of the motor can be fully utilized, while it is difficult for traditional aircraft engines to form such a pattern.

[0059] like Figures 4 to 5 As shown, in some possible embodiments, a transmission device 3 is further included, which is arranged between the housing 11 and the drive system 2, and is used to drive the propeller-fan assembly 1 to rotate and generate compound thrust under the drive of the drive system 2. Specifically, one end of the transmission device 3 is connected to the rotor 212, and the other end is connected to the housing 11.

[0060] The present application sets a transmission device 3 between the shell 11 and the drive system 2, so that the rim drive motor 21 drives the rotation, and at the same time drives the front propeller-fan combined assembly 1 to rotate through the transmission device 3, so that the propeller assembly 13 is separated from the duct 121 wind airway, so that their respective advantages can be brought into play. The rim drive motor 21 drives the ducted fan 12 and the propeller assembly 13 contained therein, which can effectively avoid the resistance caused by the cross-sectional area, thereby improving the thrust efficiency of the aircraft engine.

[0061] like Figure 6 As shown, in the above embodiment, the transmission device 3 is sleeved on the outer peripheral wall of the housing 11 and is threadedly connected to the housing 11 .

[0062] By sleeved one end of the transmission device 3 on the outer peripheral wall of one end of the housing 11, threads are provided on the inner wall of the transmission device 3 and the outer peripheral wall of one end of the housing 11, and the transmission device 3 is connected to the housing 11 through the threads.

[0063] In the above embodiment, the diameter of the transmission device 3 is the same as the diameter of the rotor 212 . Specifically, the transmission device 3 is a bearing.

[0064] The present application closely integrates the propeller assembly 13, the ducted fan 12 and the drive system 2, and equips with an optimized transmission device 3, so that the propeller can achieve high-efficiency propulsion. The integrated propeller and fan design can effectively avoid the resistance caused by the cross-sectional area, thereby improving the thrust efficiency of the aircraft engine, reducing the number of components, simplifying the overall structure, and thus reducing the weight of the aircraft.

[0065] In a preferred embodiment of the present invention, the propeller assembly 13, the ducted fan 12 and the transmission device 3 can be integrally formed.

[0066] By integrating the aviation propulsion system into one piece, we can reduce the manpower and physical costs. Since the integrated molding of parts reduces the steps and time required for assembly, we can reduce our assembly costs and the manpower required in the assembly process. Integrated molding can reduce the number of joints in the assembly process and effectively avoid quality and reliability problems caused by poor contact. Integrated molding can improve our production efficiency and eliminate the need to produce connectors that separate components. Therefore, the overall quality of the aircraft can be reduced to a certain extent. Integrated molding can reduce hidden seams and connection points to a certain extent, making the product appearance neater and more beautiful.

[0067] The propeller assembly 13 and the drive system 2 are connected by a bearing with the same diameter as the duct 121. The rotation of the motor drives the rotor 212 to rotate while driving the front half to rotate through the bearing. The two make the air flow in different areas and the front and rear ducts are the same size, so the edges of the duct fan 12 and the propeller overlap without causing too much loss to the oncoming airflow.

[0068] like Figure 7 As shown, in some possible embodiments, the rim drive motor 21 is an internal hollow structure. The ducted fan 12 is arranged inside the rim motor, and the propeller assembly 13 is arranged on the housing 214 of the rim drive. The rim drive drives the propeller assembly 13 to rotate while driving the ducted fan 12 to rotate, thereby generating additional thrust.

[0069] The present invention discloses an assembly method of a rim-driven motor. The rotor 212 of the rim-driven motor 21 is in the inner ring, and the inner ring is sleeved on the outer shell 214 of the ducted fan 12, and the outer shell 214 is connected with the propeller, which is their assembly method. The connection method can be formed by 3D printing or can be used. The propeller and the outer shell 214 are fixed by a mortise and tenon structure in close contact and bolting. In this rim motor drive, the connection method of the rotor 212 and the outer shell 214, the outer shell 214 and the ducted fan 12, and the outer shell 214 and the propeller is simple and direct, thereby reducing the loss in the energy transmission process and the number and complexity of the transmission components, greatly improving the transmission efficiency, and at the same time, the rim-driven motor is hollow in the middle, which can reserve a large enough air space for the ducted fan 12. If the driving motor makes full use of the advantage that the shape of the motor can be flexibly designed, and the motor is designed as a hollow cylindrical state in the middle, these sufficient spaces can be used, and the edge of the motor overlaps the edge of the ducted fan 12 with the edge of the propeller, so that the oncoming airflow will not cause too much area loss.

[0070] like Figure 8 As shown, the composite structure actually manufactured by 3D printing technology produces a thrust-to-power ratio of 200 watts per 1000 grams of thrust, and the power-to-weight ratio performance has good linearity, which is equivalent to a thrust of 1 kilowatt and 5 kilograms. The efficiency of the ducted fan 12 on the market is much higher. Therefore, the use of a rim-driven motor can also give full play to the advantages of the motor drive and this structure.

[0071] The above describes the specific embodiments of the present application. It should be understood that the present application is not limited to the above specific embodiments, and those skilled in the art can make various modifications or variations within the scope of the claims, which does not affect the substantive content of the present application. The above preferred features can be used in any combination without conflicting with each other.

Claims

1. A propeller-fan integrated aviation propeller, It is characterized in that include: Propeller-fan integrated assembly; The propeller-fan integrated assembly comprises: case; a ducted fan disposed in the housing; A propeller assembly is arranged on the outer peripheral wall of the housing; A drive system is connected to the housing and is used to drive the propeller-fan assembly to rotate and generate compound thrust.

2. The propeller-fan integrated aviation propeller according to claim 1, It is characterized in that The propeller assembly includes a plurality of propeller blades, and the plurality of propeller blades are evenly spaced and arranged on the outer peripheral wall of the housing; The propeller blades and the housing are integrally formed or detachably connected.

3. The propeller-fan integrated aviation propeller according to claim 2, It is characterized in that The ducted fan comprises: A duct is embedded in the shell and is integrally formed with the shell; The fan is arranged in the duct, and the driving system drives the shell to rotate, thereby driving the duct and the fan to rotate.

4. The propeller-fan integrated aviation propeller according to claim 3, It is characterized in that The drive system includes a rim drive motor, and the rim drive motor includes: an internal rotor and an external stator; A rolling body is provided between the stator and the rotor; The rotor is connected to the housing, and is used for driving the housing to rotate while the rotor rotates, thereby driving the propeller assembly and the ducted fan to rotate.

5. The propeller-fan integrated aviation propeller according to claim 4, It is characterized in that The diameter of the housing is the same as the diameter of the rotor.

6. The propeller-fan integrated aviation propeller according to claim 4, It is characterized in that It also includes a transmission device, which is arranged between the shell and the drive system and is used to drive the propeller-fan integrated assembly to rotate under the drive of the drive system to generate a compound thrust.

7. The propeller-fan integrated aviation propeller according to claim 6, It is characterized in that One end of the transmission device is connected to the rotor, and the other end is connected to the housing.

8. The propeller-fan integrated aviation propeller according to claim 7, It is characterized in that The transmission device is sleeved on the outer peripheral wall of the shell and is threadedly connected to the shell. The diameter of the transmission device is the same as the diameter of the rotor.

9. The propeller-fan integrated aviation propeller according to claim 6, It is characterized in that The transmission device is a bearing.

10. The propeller-fan integrated aviation propeller according to claim 4, It is characterized in that The wheel rim drive motor comprises a housing and a hollow structure located in the housing; The ducted fan is arranged in the hollow structure of the rim drive motor, and the propeller assembly is installed on the outer shell. The rim drive motor drives the propeller assembly to rotate while driving the ducted fan to rotate, thereby generating additional thrust.

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