Annular propeller

Abstract

The utility model relates to a propeller, in particular to an annular propeller which comprises a blade disc, a plurality of outer grooves which are evenly arrayed are formed in the side wall of the blade disc in a penetrating mode, a plurality of first round holes which are evenly arrayed are formed in the blade disc in a penetrating mode, a plurality of grooves which are evenly arrayed are formed in the side wall of a second round hole, and the size and the length of a linear blade are consistent with those of an annular edge. The width of the blade is consistent with that of an original annular blade, the blade is also an optimized low-resistance geometrical shape, the continuity and the damping effect of airflow are better ensured, the newly-added blade is located in the middle of the inner side of each annular blade, the overall strength of the annular propeller is enhanced, and meanwhile the vibration characteristic of the blade is weakened. The blades are made of titanium alloy or aeronautical aluminum alloy, the outer layers of the blades are covered with carbon fibers and Kevlar fibers, the impact resistance of the fan blade is guaranteed while the weight is lighter, the linear blades and the annular blades are independently manufactured through the modular manufacturing process, then the linear blades and the annular blades are combined through the high-precision riveting technology, and the stability and consistency of assemblies are guaranteed.

Description

Technical Field

[0001] The utility model relates to a propeller, in particular to an annular propeller. Background Art

[0002] In the propulsion system of an aircraft, a propeller is a key component, and its design directly affects the performance of the aircraft, including lift, thrust and noise level. Although the annular propellers currently on the market, as described in U.S. Patent No. 10836466, have made progress in reducing noise, they are still limited in structural strength and performance suitable for manned aircraft. The existing fan-shaped propellers are too noisy, and the existing annular propeller structure that can transfer noise to low frequencies is not strong enough and stable under high load applications. Therefore, the purpose of the utility model is to provide an annular propeller. Utility Model Content

[0003] The main purpose of the utility model is to provide an annular propeller to solve the problem that the existing fan-blade propeller proposed in the related art has excessive noise, and the existing annular propeller structure that can transfer noise to low frequency has insufficient strength and stability under high load applications.

[0004] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, there is provided an annular propeller, comprising a blade disk, a side wall of the blade disk is penetrated by a plurality of outer grooves in a uniform array, a first circular hole in a uniform array is penetrated on the blade disk, a second circular hole is penetrated at the center of the upper surface of the blade disk, a side wall of the second circular hole is penetrated by a plurality of grooves in a uniform array, and a blade portion is provided on the side wall of the blade disk.

[0005] Furthermore, the blade portion includes a first annular blade, a first clamping groove is formed at one end of the first annular blade, and a plurality of second protruding rods are formed on the inner wall of the other end of the first annular blade.

[0006] Furthermore, a connecting blade is provided at one end of the first slot, a plurality of first through holes are formed through both sides of the connecting blade, and a plurality of first protruding rods are provided at the center of the inner wall of the connecting blade.

[0007] Furthermore, a second annular blade is provided at the other end of the connecting blade, a plurality of second convex rods are fixedly provided on the inner wall of one end of the second annular blade, an arc groove is provided at the other end of the second annular blade, and a plurality of third convex rods are fixedly provided in the arc groove.

[0008] Furthermore, a straight blade is provided on the inner wall of the connecting blade, a surface of one end of the straight blade is arc-shaped, a plurality of second through holes are opened through one end of the straight blade, and a second slot is opened at the other end of the straight blade.

[0009] Furthermore, the outer groove is correspondingly connected to the first slot, the outer groove is correspondingly connected to the second slot, the first annular blade and the second annular blade are arc-shaped, and the length of the straight blade is the same as the distance between the two ends of the first annular blade.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] In this annular propeller, the length of the newly added straight blades is consistent with the edge of the ring, and the width is consistent with the original annular blades. They are also optimized low-resistance geometric shapes to better ensure the continuity of the airflow and the shock absorption effect. The newly added blades are located in the middle of the inner side of each ring, which enhances the overall strength of the annular propeller and weakens the vibration characteristics of the blades. The blade materials include titanium alloy or aviation aluminum alloy as the keel, and the outer layer is covered with carbon fiber and Kevlar fiber, which is lighter and ensures the impact resistance of the fan blades. A modular manufacturing process is adopted to manufacture straight blades and annular blades separately, and then a high-precision riveting technology combination is used to ensure the stability and consistency of the components. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the preferred embodiment of the utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the blade disk in the preferred embodiment of the utility model;

[0014] Figure 3 This is a schematic diagram of the structure of the blade side view in the preferred embodiment of the utility model;

[0015] Figure 4 This is a schematic diagram of the structure of the blade in the preferred embodiment of the utility model from the front;

[0016] Figure 5 This is a schematic diagram of the structure of the blade layers in the preferred embodiment of the utility model;

[0017] Figure 6 It is a schematic structural diagram of a blade cross-section in a preferred embodiment of the utility model.

[0018] Illustrations: 1. First annular blade; 101. Second annular blade; 103. Connecting blade; 2. Straight blade; 3. Leaf disk; 4. First circular hole; 5. Second circular hole; 6. Groove; 7. Outer groove; 8. First material layer; 9. Second material layer; 10. Third material layer; 11. First through hole; 12. Second through hole; 13. First slot; 14. Second slot; 15. First protrusion; 16. Second protrusion; 17. Third protrusion. DETAILED DESCRIPTION

[0019] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0020] See also Figure 1 - Figure 6 As shown, the purpose of this embodiment is to reduce the noise of the annular propeller and make the structural strength more stable. In view of this, an annular propeller is provided, including a blade disk 3, a plurality of uniform arrays of outer grooves 7 are formed through the side wall of the blade disk 3, a plurality of uniform arrays of first circular holes 4 are formed through the blade disk 3, a second circular hole 5 is formed through the center of the upper surface of the blade disk 3, a plurality of uniform arrays of grooves 6 are formed on the side wall of the second circular hole 5, and a blade portion is provided on the side wall of the blade disk 3. The second circular hole 5 of the blade disk 3 is used to connect with the motor, and the groove 6 on the inner wall of the second circular hole 5 is used to increase the contact area between the motor output shaft and the inner wall of the second circular hole 5, so that the motor and the blade disk 3 are connected more firmly, and the first circular hole 4 on the blade disk 3 can reduce the overall weight of the blade disk 3.

[0021] The blade portion includes a first annular blade 1, a first clamping groove 13 is formed at one end of the first annular blade 1, and a plurality of second protruding rods 16 are formed on the inner wall of the other end of the first annular blade 1. The first clamping groove 13 of the first annular blade 1 is used to be clamped and connected to the outer groove 7 of the blade disk 3, and the second protruding rod 16 of the first annular blade 1 is used to be connected to the first through hole 11 to connect and fix the connecting blade 103 to the first annular blade 1.

[0022] A connecting blade 103 is disposed at one end of the first slot 13, a plurality of first through holes 11 are formed on both sides of the connecting blade 103, and a plurality of first protruding rods 15 are disposed at the center of the inner wall of the connecting blade 103. The first protruding rods 15 on the inner wall of the connecting blade 103 are used to connect and fix the connecting blade 103 to the linear blade 2.

[0023] The other end of the connecting blade 103 is provided with a second annular blade 101, and a plurality of second protruding rods 16 are fixedly provided on the inner wall of one end of the second annular blade 101. The other end of the second annular blade 101 is provided with an arc groove, and a plurality of third protruding rods 17 are fixedly provided in the arc groove. The second protruding rods 16 on the inner wall of the second annular blade 101 are connected and fixed to the first through hole 11 of the connecting blade 103, and the connecting blade 103 is fixed to the inner wall of the second annular blade 101 and the first annular blade 1.

[0024] A straight blade 2 is disposed on the inner wall of the connecting blade 103 . The surface of one end of the straight blade 2 is arc-shaped. A plurality of second through holes 12 are formed through one end of the straight blade 2 . A second slot 14 is formed at the other end of the straight blade 2 . The second slot 14 at one end of the straight blade 2 is clamped and fixed in the outer slot 7 of the blade disk 3. The straight blade 2, the second annular blade 101 and the first annular blade 1 are all formed by a composite of multiple layers of materials, namely a first material layer 8, a second material layer 9 and a third material layer 10. When the blade size is small, the length is between 20 and 55 cm. The innermost third material layer 10 uses super-hard aluminum alloy as the keel material, and utilizes its light weight and high strength characteristics to ensure that the blade structure reduces weight as much as possible while maintaining strength. When the blade size is large, the length is greater than 55 cm. The third material layer 10 uses titanium alloy material, and its excellent strength and corrosion resistance can meet higher mechanical strength requirements and maintain structural integrity. The second material layer 9 of the middle layer is made of carbon fiber material. Through prepreg lamination technology, the carbon fiber material can better ensure the uniform distribution of carbon fiber and the optimal fiber direction. The outermost first material layer 8 is made of Kevlar fiber material, and a vacuum bag curing process is used to increase adhesion to the carbon fiber layer and edge closure.

[0025] The outer groove 7 is correspondingly connected with the first clamping groove 13, and the outer groove 7 is correspondingly connected with the second clamping groove 14. The first annular blade 1 and the second annular blade 101 are in an arc shape, and the length of the straight blade 2 is the same as the distance between the two ends of the first annular blade 1. The same length of the straight blade 2 and the distance between the two ends of the first annular blade 1 can make the straight blade 2 better fixed on the connecting blade 103 between the first annular blade 1 and the second annular blade 101. Finally, the surface of the blade disk 3 is anodized or coated with a protective layer to improve corrosion resistance and wear resistance.

[0026] The length of the newly added straight blade 2 is consistent with the annular edge, and the width is consistent with the original annular blade. It is also an optimized low-resistance geometry to better ensure the continuity of the airflow and the shock absorption effect. The newly added straight blade 2 is located in the middle of the inner side of each annular blade, which enhances the overall strength of the annular propeller and weakens the vibration characteristics of the blade. The blade material includes titanium alloy or aviation aluminum alloy as the keel, and the outer layer is covered with carbon fiber and Kevlar fiber, which is lighter and ensures the impact resistance of the fan blade. A modular manufacturing process is adopted to manufacture straight blades and annular blades separately, and then a high-precision riveting technology combination is used to ensure the stability and consistency of the components.

[0027] When the utility model is used in practice, the connecting blade 103 is first connected and fixed to the first annular blade 1, and then the connecting blade 103 is connected and fixed to the second annular blade 101, and then the straight blade 2 is connected to the first protruding rod 15 of the connecting blade 103 for fixing, and then the first slot 13 of the first annular blade 1 and the second slot 14 of the straight blade 2 are clamped on the outer groove 7 of the outer wall of the blade disk 3, and the third protruding rod 17 of the second annular blade 101 is fixed to the outer wall of the adjacent first annular blade 1, and the riveting between the blades makes the entire annular propeller more solid, stable and consistent, and then the motor is connected and fixed to the second circular hole 5 of the blade disk 3, and the annular propeller can be rotated for use, so that the noise of the overall annular propeller will be greatly reduced, and the structural strength will be higher.

[0028] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An annular propeller, comprising a blade disk (3), characterized in that: The side wall of the blade disk (3) is penetrated by a plurality of outer grooves (7) in a uniform array, the blade disk (3) is penetrated by a plurality of first circular holes (4) in a uniform array, a second circular hole (5) is penetrated at the center of the upper surface of the blade disk (3), the side wall of the second circular hole (5) is penetrated by a plurality of grooves (6) in a uniform array, and the side wall of the blade disk (3) is provided with a blade portion.

2. The annular propeller according to claim 1, characterized in that: The blade portion comprises a first annular blade (1), one end of the first annular blade (1) is provided with a first clamping groove (13), and the inner wall of the other end of the first annular blade (1) is provided with a plurality of second protruding rods (16).

3. The annular propeller according to claim 2, characterized in that: A connecting blade (103) is provided at one end of the first slot (13), a plurality of first through holes (11) are provided through both sides of the connecting blade (103), and a plurality of first protruding rods (15) are provided at the center of the inner wall of the connecting blade (103).

4. The annular propeller according to claim 3, characterized in that: A second annular blade (101) is provided at the other end of the connecting blade (103), a plurality of second convex rods (16) are fixedly provided on the inner wall of one end of the second annular blade (101), and an arc-shaped groove is provided at the other end of the second annular blade (101), a plurality of third convex rods (17) are fixedly provided in the arc-shaped groove.

5. The annular propeller according to claim 4, characterized in that: The inner wall of the connecting blade (103) is provided with a straight blade (2), one end surface of the straight blade (2) is arc-shaped, one end of the straight blade (2) is penetrated by a plurality of second through holes (12), and the other end of the straight blade (2) is provided with a second slot (14).

6. The annular propeller according to claim 5, characterized in that: The outer groove (7) is correspondingly connected to the first clamping groove (13), and the outer groove (7) is correspondingly connected to the second clamping groove (14). The first annular blade (1) and the second annular blade (101) are in an arc shape, and the length of the straight blade (2) is the same as the distance between the two ends of the first annular blade (1).

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