CN218858681U

CN218858681U - Ducted structure, ducted fan and aircraft

Info

Publication number: CN218858681U
Application number: CN202221695788.9U
Authority: CN
Inventors: 胡华智
Original assignee: Ehang Intelligent Equipment Guangzhou Co Ltd
Current assignee: Ehang Intelligent Equipment Guangzhou Co Ltd
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2023-04-14
Anticipated expiration: 2032-06-30

Abstract

The embodiment of the application discloses duct structure is applied to the duct fan, includes: the first duct of annular and extend outwards along this first duct and with the communicating one or more second duct of first duct. The application also discloses a corresponding ducted fan and an aircraft. This application can improve propulsion efficiency greatly, reduce the size, improves the speed governing characteristic, not only can produce the propulsive force, to a plurality of duct fan driven aircraft moreover, as long as the thrust speed of every duct fan of independent control, just can reach the effect of direct production attitude control power.

Description

Ducted structure, ducted fan and aircraft

Technical Field

The embodiment of the application relates to the aircraft technology, in particular to a duct structure, a duct fan and an aircraft.

Background

The ducted fan is a propeller which is provided with a duct at the periphery of a fan type propeller to generate propulsive force, and is also called a ducted propeller. Compared with the traditional propeller, the ducted propeller has the advantages of small eddy current loss, compact structure and low noise, and has obvious advantages in the application of small vertical take-off and landing unmanned aerial vehicles.

Ducted fans of the prior art are typically applied to turbine engines to generate propulsion by means of a central axial drive blade. The blade root of the ducted fan with the structure has the advantages of large stress, large through-flow resistance, large disturbance loss in flow, low propulsion efficiency, large size and low speed regulation characteristic, and can only generate thrust but not directly generate attitude control force.

Disclosure of Invention

The embodiment of the application provides a ducted structure, a ducted fan and an aircraft, so that the propelling efficiency of the ducted fan is increased, the size is reduced, and the attitude control force can be directly generated.

In a first aspect, an embodiment of the present application provides a ducted structure, which is applied to a ducted fan, and includes:

the first duct of annular and follow this first duct extend outward and with the communicating one or more second duct of first duct.

In some possible embodiments, the second duct is tangential to the first duct, forming a volute structure, and has a length greater than the length of the second duct that it intersects the first duct.

In some possible embodiments, the main body of the first duct is an outer semi-circular ring.

In some possible embodiments, guard rails are further disposed on the front and/or the back of the first duct.

In some possible embodiments, the guard rail comprises a plurality of guard bars radially diverging to the semi-circular side edge.

In some possible embodiments, the central position of the guard rail is set as an inner ring, and the guard bar radiates from the outer side of the inner ring; and/or the periphery of the protective guard is also provided with an outer ring connected with the inner side of the main body.

In some possible embodiments, a mounting rim is also provided on the inner ring.

In some possible embodiments, the mounting rim is disposed inwardly along a vertical plane of the inner ring.

In some possible embodiments, the front side guard bars and the back side guard bars are staggered; and/or the protective strip is of an arc-shaped structure.

In a second aspect, embodiments of the present application provide a ducted fan including a ducted structure as described above.

In a third aspect, embodiments of the present application provide an aircraft comprising an airframe and a ducted propeller disposed outside the airframe, the ducted propeller including at least two ducted fans as described above.

In some possible embodiments, the body is of missile-type shell construction.

The beneficial effect of this application is:

the embodiment of the application extends the setting rather than communicating second duct through the periphery of first duct, the utilization is followed the air current that forms in the second duct gets into first duct to form the air thrust that can drive the paddle rotation in first duct and produce lift to the aircraft, because changed radial drive into with coaxial drive, thereby improved propulsion efficiency greatly, the size has been reduced, speed governing characteristic has been improved, not only can produce the propulsive force, and to a plurality of duct fan drive's aircraft, as long as the thrust speed of every duct fan of independent control, just can reach the effect of direct production attitude control power.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief description will be given below of the drawings required for the embodiments or the technical solutions in the prior art, and it is obvious that the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a perspective view of a ducted structure according to an embodiment of the present application.

Figure 2 is a plan view schematic of a ducted structure according to an embodiment of the present application.

Figure 3 is another plan view schematic of the ducted structure of an embodiment of the present application.

Fig. 4 is a schematic structural diagram of a ducted fan according to an embodiment of the present application.

FIG. 5 is a schematic structural diagram of an aircraft in an embodiment of the present application.

Description of the reference numerals:

100-body; 200-ducted fans; 10-ducted configuration;

1-a first duct, 2-a second duct, 11-a body, 12-a guard rail, 120-a guard bar, 121-an inner ring, 122-an outer ring, 1211-a mounting rim.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described in detail through embodiments with reference to the accompanying drawings in the examples of the present application. Obviously, the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be noted that: in the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout; in the description of the present application, the terms "central," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like refer to orientations or positional relationships illustrated in the drawings, which are used for convenience in describing the present application and to simplify the description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the scope of the present application; in the description of the present application, "first", "second", and the like are used only for distinguishing one from another, and do not indicate the degree of importance, order, and the like thereof.

In the description of the present application, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a movable connection, and a detachable connection; can be mechanically or electrically connected; may be directly connected, may be indirectly connected through an intermediate medium, may be internally connected to the two elements, or the like. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.

Referring to fig. 1 to 5, a ducted structure 10 provided in an embodiment of the present application is applied to a ducted fan 200, and includes:

a first duct 1 of annular shape and one or more second ducts 2 extending outwards along the first duct 1 and communicating with said first duct 1.

In some possible embodiments, the second duct 2 is tangential to the first duct 1, forming a volute structure, and the length of the second duct 2 is greater than the length of the intersection with the first duct 1.

In some possible embodiments, the main body 11 of the first duct 1 is of an external semi-circular ring shape.

In some possible embodiments, guard rails 12 are further disposed on the front and/or the back of the first duct 1.

In some possible embodiments, the guard rail 12 comprises a plurality of guard bars 120 radially diverging to the semi-circular side edge.

In some possible embodiments, the central position of the guard rail 12 is set as an inner ring 121, and the guard bar 120 radiates from the outside of the inner ring 121;

in some possible embodiments, the outer circumference of the guard rail 12 is further provided with an outer ring 122 connected to the inner side of the main body 11.

In some possible embodiments, a mounting rim 1211 is also provided on the inner ring 121.

In some possible embodiments, the mounting rim 1211 is disposed inwardly along a vertical plane of the inner ring 121.

In some possible embodiments, the front side guard bars 120 and the back side guard bars 120 are staggered;

in some possible embodiments, the guard bar 120 is an arc-shaped structure.

Referring to fig. 3, the ducted fan 200 provided in the embodiment of the present application includes the ducted structure 10 as described in the previous embodiment.

Referring to fig. 4, an aircraft provided by the embodiment of the present application includes an airframe 100 and a ducted propeller disposed outside the airframe 100, where the ducted propeller includes at least two ducted fans 200 as described in the previous embodiments.

In some possible embodiments, the machine body 100 adopts a missile type shell structure.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present application and the technical principles employed. Those skilled in the art will appreciate that the present application is not limited to the particular embodiments described herein, but is capable of many obvious modifications, rearrangements and substitutions without departing from the scope of the application. Therefore, although the present application has been described in more detail with reference to the above embodiments, the present application is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. The utility model provides a duct structure, is applied to duct fan, its characterized in that includes:

the first duct of annular and along this first duct outwards extend and with the communicating one or more second duct of first duct, the second duct with first duct is tangent, forms the whirlpool cover structure, the main part of first duct is outer semicircle annular.

2. The ducted structure according to claim 1, wherein:

the second duct has a length greater than the length of the second duct that intersects the first duct.

3. The ducted structure according to claim 1 or 2, characterized in that: guard railings are further arranged on the front face and/or the back face of the first duct.

4. The ducted structure according to claim 3, wherein: the guard rail comprises a plurality of guard strips which are radially diffused to the semicircular annular side edge.

5. The ducted structure according to claim 4, wherein:

the central position of the guard rail is set as an inner ring, and the guard bar starts to radiate from the outer side of the inner ring; and/or the periphery of the protective guard is also provided with an outer ring connected with the inner side of the main body.

6. The ducted structure according to claim 5, wherein: and the inner ring is also provided with a mounting edge.

7. The ducted structure according to claim 6, wherein: the mounting flange is disposed inwardly along a vertical plane of the inner ring.

8. The ducted structure according to claim 3, wherein: the protection strips on the front side and the protection strips on the back side are arranged in a staggered mode; and/or the protective strip is of an arc-shaped structure.

9. A ducted fan, characterized by: comprising a ducted structure according to any of claims 1-8.

10. The utility model provides an aircraft, includes organism and locates the duct propeller of organism outside which characterized in that: the ducted propeller comprises at least two ducted fans according to claim 9.

11. The aircraft of claim 10, wherein: the machine body adopts a missile type shell structure.