Ducted fan structure, aircraft power system and aircraft

Abstract

The utility model relates to a ducted fan structure, an aircraft power system and an aircraft, the ducted fan structure comprises an outer frame, a paddle assembly, a motor and a fixing rod, and the motor is fixedly installed in the outer frame; the paddle assembly is fixedly mounted at the driving end of the motor; the fixing rod is located outside the outer frame, and one end is fixedly connected with the tail end of the motor. The utility model has the beneficial effects of simple structure, reasonable design, small volume, high rotating speed of the motor, high power and long service life.

Description

Technical Field

[0001] The utility model relates to the technical field of aircraft, and particularly relates to a ducted fan structure, an aircraft power system and an aircraft. Background Art

[0002] As an aircraft power system, the ducted fan has the advantages of high efficiency, low noise, strong environmental adaptability and high safety. However, due to the limitations of materials, power and electronic technologies, the technical problems such as the excessive weight of the structure and airborne system of the ducted aircraft and poor stability have not been well solved, which has also greatly restricted the development of the ducted aircraft. With the improvement of basic technologies and the emergence of lightweight aviation materials, the technical difficulties in the development of ducted aircraft have been gradually solved. At present, the ducted configuration aircraft is in good agreement with the development trend of unmanned aircrafts and is one of the hotspots in the development of unmanned aircraft technology.

[0003] The ducted fan aircraft configuration has extremely high recognition. Its lift system mainly adopts a ducted configuration, and the propeller blades are arranged inside the duct. The ducted fan has higher aerodynamic efficiency than an air propeller of the same size. The specific reasons are as follows:

[0004] 1) The distance between the propeller tip and the inner wall of the duct is very close, which can effectively inhibit the generation of tip vortices, thereby improving the aerodynamic efficiency of the propeller;

[0005] 2) The duct changes the slipstream state downstream of the propeller blade, increases the slipstream area, reduces the slipstream velocity and the loss of slipstream kinetic energy;

[0006] 3) At the position of the duct lip above the propeller, due to the contraction of the flow tube cross-section, the air flow accelerates, forming a negative pressure area that can generate leading-edge suction. At the same time, the expansion of the duct below the rotor can reduce the air flow velocity and increase the static pressure, so that the ducted fan generates greater lift.

[0007] Under the conditions of the same propeller diameter and thrust, in the hover state, a well-designed ducted fan can improve the propeller efficiency by 15% - 35% compared with an air propeller of the same size. Due to the high hover propeller efficiency of the ducted fan, a propeller diameter much smaller than that of a helicopter can be used, so that the problem of excessive tip Mach number caused by a large propeller diameter during forward flight can be effectively solved. Due to the suppression of tip vortices by the duct wrapping and the real physical shielding, the noise can be effectively reduced. Therefore, the ducted fan aircraft has the advantages of low noise and high collision safety. Content of the Utility Model

[0008] The utility model provides a ducted fan structure, an aircraft power system and an aircraft, aiming to solve the problems in the prior art.

[0009] The technical solution of the utility model to solve the above technical problems is as follows:

[0010] A ducted fan structure includes an outer frame, a blade assembly, a motor, and a fixing rod. The motor is fixedly installed inside the outer frame; the blade assembly is fixedly installed on the driving end of the motor; the fixing rod is located outside the outer frame, and one end of the fixing rod is fixedly connected to the end of the motor.

[0011] The beneficial effects of the present utility model are as follows: During use, the motor drives the blade assembly to rotate to generate a forward driving force, thereby providing power for the aircraft.

[0012] The structure of the present utility model is simple, reasonably designed, small in size, high in motor speed, large in power, and long in service life.

[0013] On the basis of the above technical solution, the present utility model can also be improved as follows.

[0014] Further, the motor is fixedly connected to the outer frame through a bracket assembly.

[0015] The beneficial effect of adopting the above further solution is that the structure is simple, reasonably designed, the motor and the outer frame are connected by the bracket assembly, the assembly is convenient, and the stability of the motor assembly is ensured.

[0016] Further, the bracket assembly includes a plurality of connecting brackets. The plurality of connecting brackets are evenly spaced in a circumferential manner outside the motor, and both ends of the plurality of connecting brackets are respectively fixedly connected to the motor and the outer frame.

[0017] The beneficial effect of adopting the above further solution is that the structure is simple, reasonably designed, the motor and the outer frame are connected by a plurality of connecting brackets, which can not only realize the assembly between the motor and the outer frame, but also does not affect the power generated by the blade assembly.

[0018] Further, a plurality of slots are evenly spaced on the inner wall of the outer frame. The other ends of the plurality of connecting brackets are respectively fixedly connected with tenons, and the plurality of tenons are respectively inserted into the plurality of slots.

[0019] The beneficial effect of adopting the above further solution is that the structure is simple, reasonably designed, and the quick assembly between the connecting bracket and the outer frame is realized by the insertion between the tenons at the other ends of the plurality of connecting brackets and the plurality of slots on the inner wall of the outer frame, which saves time and effort.

[0020] Further, one ends of the plurality of connecting brackets are respectively fixedly connected with bracket seats, and the plurality of bracket seats are respectively fixedly connected to the motor through bolts.

[0021] The beneficial effect of adopting the above further solution is that the structure is simple, reasonably designed, one ends of the plurality of connecting brackets are connected to the motor through the bracket seats, increasing the contact area between the other ends of the plurality of connecting brackets and the motor, and ensuring the stability of the assembly.

[0022] Further, a plurality of the bracket seats are respectively provided with avoidance notches for avoiding the bolts.

[0023] The beneficial effect of adopting the above further solution is that the structure is simple, the avoidance notches are reasonably arranged, which is convenient for assembling the bolts, and the weight is light.

[0024] Further, a heat sink is fixedly installed at the end of the motor, a rear air deflector is fixedly sleeved at the end of the motor, and a front air deflector is fixedly sleeved at the driving end of the motor.

[0025] The beneficial effect of adopting the above further solution is that the structure is simple, the design is reasonable, the heat sink is used to dissipate heat from the motor, ensuring the working performance of the motor;

[0026] In addition, the above-mentioned front air deflector and rear air deflector guide the airflow generated during the rotation of the blade assembly.

[0027] Further, the fixing rod is an L-shaped rod, the L-shaped rod includes a first rod and a second rod, one end of the first rod is fixedly connected to the end of the motor; the second rod is distributed perpendicular to the first rod, one end of it is fixedly connected to the other end of the first rod, and the other end is fixedly connected with a flange for connecting the fuselage; the inside of the first rod is hollow, and a plurality of wire passing holes are provided inside it.

[0028] The beneficial effect of adopting the above further solution is that the structure is simple, and the shape design of the above fixing rod is reasonable, which can not only realize the connection between the motor and the fuselage, but also facilitate the assembly of the cables.

[0029] The present invention also relates to an aircraft power system, including the ducted fan structure as described above.

[0030] The beneficial effect of adopting the above further solution is that the present invention also provides an aircraft power system, the power system has a simple structure, reasonable design, small volume, high motor speed, high strength and long service life.

[0031] The present invention also relates to an aircraft, including the aircraft power system as described above.

[0032] The beneficial effect of adopting the above further solution is that the present invention also provides an aircraft, the aircraft has a simple structure, reasonable design, small volume, high motor speed, high strength and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is one of the structural schematic diagrams of the present invention;

[0034] Figure 2 is the second structural schematic diagram of the present invention;

[0035] Figure 3This is the front view of the present utility model;

[0036] Figure 4 This is the side view of the present utility model;

[0037] Figure 5 is Figure 4 the sectional view taken along the A-A direction in

[0038] Figure 6 This is one of the exploded views of the present utility model;

[0039] Figure 7 This is the second exploded view of the present utility model;

[0040] Figure 8 This is the structural schematic diagram of a single connecting bracket in the present utility model.

[0041] In the drawings, the list of components represented by each reference numeral is as follows:

[0042] 1. Outer frame; 2. Blade assembly; 3. Motor; 4. Fixed rod; 5. Connecting bracket; 6. Mortise; 7. Bracket seat; 8. Rear fairing; 9. Front fairing; 10. Flange. Detailed implementation manners

[0043] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0044] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0045] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0046] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0047] Example 1

[0048] like Figures 1 to 8 As shown, this embodiment provides a ducted fan structure, including an outer frame 1, a blade assembly 2, a motor 3 and a fixing rod 4, wherein the motor 3 is fixedly installed in the outer frame 1; the blade assembly 2 is fixedly installed on the driving end of the motor 3; the fixing rod 4 is located outside the outer frame 1, and one end thereof is fixedly connected to the end of the motor 3.

[0049] During use, the motor 3 is used to drive the blade assembly 2 to rotate to generate a forward thrust, thereby providing power for the aircraft.

[0050] Preferably, in this embodiment, the outer frame 1 is preferably a circular ring structure.

[0051] In addition, the outer wall of the outer frame 1 is an arc-shaped structure.

[0052] This embodiment has a simple structure, reasonable design, small size, high motor speed, high power and long service life.

[0053] Example 2

[0054] On the basis of Example 1, in this embodiment, the motor 3 is fixedly connected to the outer frame 1 via a bracket assembly.

[0055] This solution has a simple structure and a reasonable design. The bracket assembly is used to connect the motor 3 and the outer frame 1, which is convenient for assembly and ensures the stability of the assembly of the motor 3.

[0056] Example 3

[0057] On the basis of Example 2, in this embodiment, the bracket assembly includes a plurality of connecting brackets 5, and the plurality of connecting brackets 5 are evenly distributed outside the motor 3 at circumferential intervals, and the two ends thereof are fixedly connected to the motor 3 and the outer frame 1 respectively.

[0058] This solution has a simple structure and a reasonable design. By using multiple connecting brackets 5 to connect the motor 3 and the outer frame 1, the assembly between the motor 3 and the outer frame 1 can be achieved without affecting the power generated by the blade assembly 2.

[0059] Preferably, in this embodiment, the above-mentioned multiple connecting brackets 5 are respectively preferably in the shape of long strip plates and extend radially along the outer frame 1.

[0060] In addition, preferably six of the above-mentioned connecting brackets 5 are provided.

[0061] Embodiment 4

[0062] On the basis of Embodiment 3, in this embodiment, a plurality of slots are evenly spaced on the inner wall of the outer frame 1. The other ends of the plurality of connecting brackets 5 are respectively fixedly connected with tenons 6, and the plurality of tenons 6 are respectively inserted into the plurality of slots.

[0063] This solution has a simple structure and a reasonable design. By inserting the tenons 6 at the other ends of the multiple connecting brackets 5 into the multiple slots on the inner wall of the outer frame 1, the rapid assembly between the connecting brackets 5 and the outer frame 1 is realized, saving time and effort.

[0064] Preferably, in this embodiment, the plurality of tenons 6 are respectively preferably in the shape of long strips and extend along the width direction of the connecting bracket 5.

[0065] In addition, one side of the plurality of tenons 6 is in a linear structure and the other side is in an arc structure.

[0066] Embodiment 5

[0067] On the basis of any one of the above-mentioned Embodiments 3 to 4, in this embodiment, one ends of the plurality of connecting brackets 5 are respectively fixedly connected with bracket seats 7, and the plurality of bracket seats 7 are respectively fixedly connected with the motor 3 through bolts.

[0068] This solution has a simple structure and a reasonable design. One ends of the multiple connecting brackets 5 are connected to the motor 3 through the bracket seats 7, increasing the contact area between the other ends of the multiple connecting brackets 5 and the motor 3 and ensuring the stability of the assembly.

[0069] Preferably, in this embodiment, the plurality of bracket seats 7 are respectively in the shape of long strip blocks, and U-shaped grooves penetrating through both ends are respectively provided thereon; one ends of the plurality of connecting brackets 5 respectively extend into the plurality of U-shaped grooves and are respectively fixedly connected to the bottoms of the plurality of U-shaped grooves through a plurality of bolts.

[0070] Embodiment 6

[0071] On the basis of Embodiment 5, in this embodiment, avoiding notches for avoiding the bolts are respectively provided on the plurality of bracket seats 7.

[0072] This solution has a simple structure, a reasonable avoidance notch, is convenient for assembling bolts, and is light in weight.

[0073] Embodiment 7

[0074] Based on the above embodiments, in this embodiment, a heat sink is fixedly installed at the end of the motor 3, a rear air deflector 8 is fixedly sleeved on the end of the motor 3, and a front air deflector 9 is fixedly sleeved on the driving end of the motor 3.

[0075] This solution has a simple structure and a reasonable design. The heat sink is used to dissipate heat from the motor 3 to ensure the working performance of the motor 3.

[0076] In addition, the above front air deflector 9 and rear air deflector 8 guide the airflow generated during the rotation of the blade assembly 2.

[0077] Preferably, in this embodiment, the above front air deflector 9 and rear air deflector 8 are respectively of a structure that is thick at one end and thin at the other end, and their thick ends are respectively open; the thick ends of the front air deflector 9 and rear air deflector 8 are respectively fixedly connected to both ends of the motor 3.

[0078] Embodiment 8

[0079] Based on the above embodiments, in this embodiment, the fixing rod 4 is an L-shaped rod. The L-shaped rod includes a rod one and a rod two. One end of the rod one is fixedly connected to the end of the motor 3; the rod two is distributed perpendicular to the rod one, one end of it is fixedly connected to the other end of the rod one, and the other end is fixedly connected to a flange 10 for connecting to the fuselage; the rod one is hollow inside, and there are several wire passing holes inside it.

[0080] This solution has a simple structure. The shape design of the above fixing rod 4 is reasonable, which can not only realize the connection between the motor 3 and the fuselage, but also facilitate the assembly of cables.

[0081] Preferably, in this embodiment, the above rear air deflector 8 covers the rod one.

[0082] In addition, an avoidance opening is provided at the edge of the corresponding end of the above outer frame 1, and the rod two passes through the avoidance opening.

[0083] Embodiment 9

[0084] Based on the above embodiments, this embodiment further provides an aircraft power system, including the ducted fan structure as described above.

[0085] This embodiment further provides an aircraft power system. This power system has a simple structure, a reasonable design, a small volume, a high motor speed, high strength, and a long service life.

[0086] Embodiment 10

[0087] Based on the above-mentioned Embodiment 9, this embodiment further provides an aircraft, including the aircraft power system as described above.

[0088] This embodiment further provides an aircraft, which has a simple structure, reasonable design, small volume, high motor speed, high strength, and long service life.

[0089] The working principle of the present utility model is as follows:

[0090] During use, the motor 3 is used to drive the blade assembly 2 to rotate, so as to generate a forward driving force, thereby providing power for the aircraft.

[0091] It should be noted that all the electronic components involved in the present utility model adopt existing technologies, and the above-mentioned components are electrically connected to the controller, and the control circuits between the controller and each component are existing technologies.

[0092] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0093] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0094] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A ducted fan structure, characterized in that: It includes an outer frame (1), a blade assembly (2), a motor (3) and a fixing rod (4). The motor (3) is fixedly installed inside the outer frame (1); the blade assembly (2) is fixedly installed on the driving end of the motor (3); the fixing rod (4) is located outside the outer frame (1), and one end of it is fixedly connected to the end of the motor (3); the fixing rod (4) is an L-shaped rod, and the L-shaped rod includes a first rod and a second rod. One end of the first rod is fixedly connected to the end of the motor (3); the second rod is distributed perpendicular to the first rod, one end of it is fixedly connected to the other end of the first rod, and the other end is fixedly connected with a flange (10) for connecting to the fuselage; the first rod is hollow inside, and there are several wire passing holes inside it.

2. The ducted fan structure according to claim 1, characterized in that: The motor (3) is fixedly connected to the outer frame (1) through a bracket assembly.

3. The ducted fan structure according to claim 2, characterized in that: The bracket assembly includes a plurality of connecting brackets (5). The plurality of connecting brackets (5) are evenly spaced circumferentially outside the motor (3), and both ends of them are fixedly connected to the motor (3) and the outer frame (1) respectively.

4. The ducted fan structure according to claim 3, wherein: A plurality of slots are evenly spaced on the inner wall of the outer frame (1). The other ends of the plurality of connecting brackets (5) are respectively fixedly connected with tenons (6), and the plurality of tenons (6) are respectively inserted into the plurality of slots.

5. The ducted fan structure according to claim 3, wherein: One ends of the plurality of connecting brackets (5) are respectively fixedly connected with bracket seats (7), and the plurality of bracket seats (7) are respectively fixedly connected to the motor (3) through bolts.

6. The ducted fan structure according to claim 5, wherein: The plurality of bracket seats (7) are respectively provided with avoidance notches for avoiding the bolts.

7. The ducted fan structure according to any one of claims 1-6, characterized in that: A heat sink is fixedly installed at the end of the motor (3). A rear air deflector (8) is fixedly sleeved at the end of the motor (3), and a front air deflector (9) is fixedly sleeved at the driving end of the motor (3).

8. An aircraft power system, characterized in that: It includes a ducted fan structure according to any one of claims 1-7.

9. An aircraft, characterized in that: It includes an aircraft power system according to claim 8.

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