Duct airflow adjusting and guiding structure

Abstract

The utility model relates to the field of aero-engines, in particular to a duct airflow adjusting and guiding structure. The duct airflow adjusting and guiding structure comprises a nacelle shell, the right side of the nacelle shell is fixedly connected with a split box through bolts, the split box is of a split structure design, the inner side wall of the split box is of a spherical surface design, a thrust vectoring nozzle is placed in the split box, and the thrust vectoring nozzle is connected with the right side of the nacelle shell. The outer side wall of the part, located in the split casing, of the thrust vectoring nozzle is of a spherical surface design, and an air outlet in the right side of the thrust vectoring nozzle penetrates through the right side of the split casing. The ducted fan can be installed at any part of an airplane through the hanging seat according to the requirements of the airplane, and the airplane does not need to consider a movement mechanism and driving force for overturning the ducted fan and is completely realized by the ducted fan; the diameter of the thrust vectoring nozzle in spherical fit is large and is equal to the diameter of the ducted fan, so that the structural rigidity is well guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of unmanned aerial vehicle power, in particular to a ducted airflow regulating and guiding structure. Background Art

[0002] At present, when vertical take-off and landing aircraft using electric ducted fans need to change the thrust direction during take-off and landing, the whole electric ducted fan is usually flipped over to achieve this. This makes the aircraft installation structure complicated and the dynamic load is applied to the moving components, which increases the design difficulty. In addition, the ducted fan must be installed exposed on the aircraft and the structures within the movement trajectory must be avoided, which limits the aircraft structural design. In view of the above situation, technical innovation is carried out on the basis of the existing ducted airflow regulation and guidance structure. Utility Model Content

[0003] The purpose of the utility model is to provide a ducted airflow regulating and guiding structure to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a ducted airflow regulating and guiding structure, comprising:

[0005] A nacelle shell, the right side of which is fixedly connected with a split casing by bolts, the split casing is of split structure design, the inner side wall of the split casing is of spherical design, a vector nozzle is placed inside the split casing, the outer side wall of the part of the vector nozzle located inside the split casing is of spherical design, the air outlet on the right side of the vector nozzle passes through the right side of the split casing, and the diameter of the air outlet on the right side of the vector nozzle is smaller than the diameter of the spherical part of the vector nozzle, wherein:

[0006] A group of axial holes are opened through the front and rear sides of the split casing, and a group of ear shafts are set on the front and rear sides of the vector nozzle. The connecting line of the two groups of ear shafts passes through the vector nozzle and the center of the spherical part of the split casing, and the ear shafts are set in the axial holes.

[0007] Preferably, the front side of the split casing is fixedly connected to a steering gear by bolts, and the outer side wall of the output end of the steering gear is designed with external splines.

[0008] Preferably, an inner spline hole is provided on the front side of the ear shafts located in front of the vector nozzle in the two groups of ear shafts, and the portion of the output end of the servo engine provided with an outer spline is inserted into the inner spline hole.

[0009] Preferably, a fan stator casing is arranged inside the nacelle shell, a notch is penetrated through the top of the nacelle shell, a hanger is fixedly connected to the top of the fan stator casing by bolts, and the top of the hanger penetrates the top of the notch.

[0010] Preferably, a motor stator is disposed inside the fan stator casing, a motor rotor is disposed inside the motor stator, and a protruding shaft of the motor rotor passes through the left side of the motor stator.

[0011] Preferably, a fan blade disk is provided on the outer side wall of the extended shaft of the motor rotor, and the fan blade disk is located on the left side of the inner side wall of the nacelle shell.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] The utility model can be installed at any part of the aircraft through a hanger according to the needs of the aircraft. The aircraft does not need to consider the movement mechanism and driving force of the flip ducted fan, and it is completely realized by the ducted fan itself; since the diameter of the spherical match of the vector nozzle is larger and equivalent to the diameter of the ducted fan, the structural rigidity is better guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of a ducted airflow regulating and guiding structure of the utility model;

[0015] Figure 2 This is a front cross-sectional view of a ducted airflow regulating and guiding structure of the utility model;

[0016] Figure 3 It is a left side cross-sectional view of a ducted airflow regulating and guiding structure of the utility model.

[0017] In the figure: 1. Nacelle shell; 11. Hanging bracket; 12. Vector nozzle; 121. Ear shaft; 13. Split casing; 14. Servo; 2. Fan blade disk; 21. Fan stator casing; 22. Motor stator; 23. Motor rotor. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-Figure 3A ducted airflow regulating and guiding structure comprises a nacelle shell 1, the right side of the nacelle shell 1 is fixedly connected with a split casing 13 by bolts, the split casing 13 is designed as a split structure, so as to ensure that the spherical part of the vector nozzle 12 can be loaded into the spherical part of the split casing 13, the inner side wall of the split casing 13 is designed as a spherical surface, the vector nozzle 12 is placed inside the split casing 13, the outer side wall of the part of the vector nozzle 12 located inside the split casing 13 is designed as a spherical surface, the air outlet on the right side of the vector nozzle 12 passes through the right side of the split casing 13, the air outlet diameter on the right side of the vector nozzle 12 is smaller than the diameter of the spherical part of the vector nozzle 12, a group of axial holes are opened on both the front and rear sides of the split casing 13, and the front and rear sides of the vector nozzle 12 are fixed A set of ear shafts 121 is fixedly provided, and the connecting line of the two sets of ear shafts 121 passes through the center of the spherical part of the vector nozzle 12 and the split casing 13, so that the friction surface of the vector nozzle 12 in the movement can be reduced, thereby reducing the friction resistance of the movement, the ear shaft 121 is rotatably set in the shaft hole, and the front side of the split casing 13 is fixedly connected with the steering gear 14 by bolts, and the outer side wall of the output end of the steering gear 14 is designed with an external spline. The front side of the ear shaft 121 located on the front side of the vector nozzle 12 of the two sets of ear shafts 121 is provided with an internal spline hole, and the part with the external spline at the output end of the steering gear 14 is inserted into the internal spline hole. The steering gear 14 drives the vector nozzle 12 to rotate around the ear shaft 121 through the ear shaft 121, thereby changing the up and down inclination angle of the right side air outlet of the vector nozzle 12.

[0020] A fan stator casing 21 is fixedly arranged inside the nacelle shell 1, and a notch is penetrated through the top of the nacelle shell 1. The top of the fan stator casing 21 is fixedly connected to a hanger 11 by bolts, and the device is installed on the UAV through the hanger 11. The top of the hanger 11 penetrates the top of the notch, and a motor stator 22 is fixedly arranged inside the fan stator casing 21. A motor rotor 23 is rotatably arranged inside the motor stator 22. The extended shaft of the motor rotor 23 penetrates the left side of the motor stator 22, and a fan blade disk 2 is fixedly arranged on the outer wall of the extended shaft of the motor rotor 23. When the motor rotor 23 is powered on and rotated, it will drive the fan blade disk 2 to rotate. The fan blade disk 2 is located on the left side of the inner wall of the nacelle shell 1.

[0021] Working principle: The device is installed on the UAV through the mount 11. When the motor rotor 23 is powered on and rotated, it will drive the fan blade 2 to rotate, so that the external air is input into the split casing 13 along the nacelle shell 1, and then introduced into the vector nozzle 12 from the split casing 13. The servo 14 drives the vector nozzle 12 to rotate around the ear shaft 121 through the ear shaft 121, thereby changing the up and down inclination angle of the right side air outlet of the vector nozzle 12. At this time, the effect of changing the jet angle is achieved, thereby providing the UAV with propulsion at different angles. Since the diameter of the air outlet on the right side of the vector nozzle 12 is smaller than the diameter of the spherical part of the vector nozzle 12, the airflow ejected from the right side of the vector nozzle 12 can be gathered, thereby increasing the airflow speed.

Claims

1. A ducted airflow regulating and guiding structure, characterized in that: include: A nacelle shell (1), the right side of the nacelle shell (1) being fixedly connected to a split casing (13) by bolts, the split casing (13) being of split structural design, the inner side wall of the split casing (13) being of spherical design, a vector nozzle (12) being placed inside the split casing (13), the outer side wall of a portion of the vector nozzle (12) located inside the split casing (13) being of spherical design, an air outlet on the right side of the vector nozzle (12) penetrating the right side of the split casing (13), the air outlet on the right side of the vector nozzle (12) having a diameter smaller than a diameter of the spherical portion of the vector nozzle (12), wherein: A group of axial holes are formed on both the front and rear sides of the split casing (13), and a group of ear shafts (121) are formed on both the front and rear sides of the vector nozzle (12). The connecting line of the two groups of ear shafts (121) passes through the center of the spherical part of the vector nozzle (12) and the split casing (13), and the ear shafts (121) are arranged in the axial holes.

2. The ducted airflow regulating and guiding structure according to claim 1, characterized in that: The front side of the split casing (13) is fixedly connected to a steering gear (14) by means of bolts, and the outer side wall of the output end of the steering gear (14) is designed with external splines.

3. The ducted airflow regulating and guiding structure according to claim 2, characterized in that: The front side of the trunnions (121) located at the front side of the vector nozzle (12) in the two groups of trunnions (121) is provided with an inner spline hole, and the part of the output end of the steering gear (14) provided with an outer spline is inserted into the inner spline hole.

4. The ducted airflow regulating and guiding structure according to claim 1, characterized in that: A fan stator casing (21) is arranged inside the nacelle shell (1), a notch is penetrated through the top of the nacelle shell (1), a hanger (11) is fixedly connected to the top of the fan stator casing (21) by bolts, and the top of the hanger (11) penetrates the top of the notch.

5. The ducted airflow regulating and guiding structure according to claim 4, characterized in that: A motor stator (22) is disposed inside the fan stator casing (21), a motor rotor (23) is disposed inside the motor stator (22), and a protruding shaft of the motor rotor (23) passes through the left side of the motor stator (22).

6. The ducted airflow regulating and guiding structure according to claim 5, characterized in that: A fan blade disk (2) is provided on the outer side wall of the extended shaft of the motor rotor (23), and the fan blade disk (2) is located on the left side of the inner side wall of the nacelle shell (1).

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