Blade with bionic dorsal fins

Abstract

The utility model discloses a blade with bionic dorsal fins, which is provided with an inner side close to a blade handle and an outer side far away from the blade handle, the blade surface of the blade is provided with a plurality of bionic dorsal fins, the bionic dorsal fins are ribs protruding outwards from the blade surface, each rib extends from the front side of the blade to the rear side of the blade, and the blade surface of the blade is provided with the bionic dorsal fins. And the height and the thickness are continuously increased. According to the technical scheme, the bionic dorsal fins are additionally arranged on the curved surface of the blade surface by simulating the biological structure design of the multi-fin fish in the nature, the curved surface is matched with the bionic dorsal fins to have excellent fluid dynamic performance, and the fluid dynamic characteristics of the blade can be optimized by applying the curved surface shapes to the axial flow impeller; and resistance and energy consumption during fluid flowing are reduced, so that the aerodynamic efficiency and the output power of the impeller are improved. And meanwhile, more reasonable stress distribution and strength distribution are achieved, and the structural stability and durability of the axial flow impeller can be enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of wind blades, in particular to a blade with a bionic dorsal fin. Background Art

[0002] Traditional fan blades are mostly made of steel or aluminum alloy, usually with simple geometric shapes and cross-sectional shapes, such as flat, curved, twisted, etc. This simple design is easy to manufacture and install, and uses common manufacturing processes such as casting, forging, and stamping. The blades produced have a simple structure and are relatively easy to maintain and replace parts.

[0003] However, due to design and material limitations, traditional fan blades may suffer from poor aerodynamic performance, heavy weight, and low efficiency. These issues affect the overall performance and application range of the fan, leading to increased operating costs and failing to meet energy conservation and emission reduction requirements. Utility Model Content

[0004] The main purpose of the utility model is to provide a blade with a bionic dorsal fin, aiming to solve the technical problems of poor aerodynamic performance and low efficiency of traditional fan blades.

[0005] To achieve the above-mentioned purpose, the utility model proposes a blade with a bionic dorsal fin, having an inner side close to its petiole and an outer side away from the petiole. A plurality of bionic dorsal fins are provided on the surface of the blade. The bionic dorsal fins are ribs protruding outward from the blade surface. Each of the ribs extends from the front side to the rear side of the blade, and the height and thickness continue to increase.

[0006] Optionally, the bionic dorsal fins are distributed on the same leaf surface at equal intervals.

[0007] Optionally, the length of each bionic dorsal fin increases sequentially from the inner side to the outer side of the blade.

[0008] Optionally, the bionic dorsal fin is arc-shaped on the blade surface.

[0009] Optionally, the trailing edge of the blade is at least partially toothed.

[0010] Optionally, when the blade is mounted on the impeller, the blade cross-sectional parameters at the radius ∅930 with the impeller rotation axis as the center are: Cmax is 4.1mm, e is 35.5mm, b is 180.7mm, B 1A 2 degrees, B 2A is 37 degrees, ζi is 25 degrees;

[0011] Where Cmax: C is the airfoil thickness, the distance between the normal line of the airfoil centerline and the intersection of the airfoil contour line, that is, the diameter of the airfoil inscribed circle, and the maximum value of the airfoil thickness is called the maximum airfoil thickness Cmax;

[0012] e: Maximum thickness position, the distance from the leading edge of the airfoil to the maximum thickness of the airfoil along the chord direction;

[0013] b: chord length, the length of the chord of the wing;

[0014] B 1A : The airfoil inlet geometric angle is the angle between the tangent line through the leading edge of the airfoil to the airfoil centerline and the forehead line (lower horizontal line);

[0015] B 2A : The airfoil inlet geometric angle is the angle between the tangent line through the airfoil trailing edge point to the airfoil midline and the rear forehead line (upper horizontal line);

[0016] ζi: airfoil installation angle, which is the angle between the chord and the cascade front line.

[0017] Optionally, when the blade is mounted on the impeller, the blade cross-sectional parameters at the radius ∅780 with the impeller rotation axis as the center are: Cmax is 3mm, e is 30.9mm, b is 147.2mm, B 1A 5 degrees, B 2A is 30 degrees and ζi is 22 degrees.

[0018] Optionally, the blade section parameters at radius ∅630 are: Cmax is 3.3 mm, e is 30.7 mm, b is 137.2 mm, B 1A 5 degrees, B 2A is 35 degrees and ζi is 25 degrees.

[0019] Optionally, the blade section parameters at radius ∅480 are: Cmax is 3.8 mm, e is 39.2 mm, b is 126.7 mm, B 1A 8 degrees, B 2A is 43 degrees and ζi is 33 degrees.

[0020] Optionally, the blade section parameters at radius ∅330 are: Cmax is 4.8 mm, e is 49.3 mm, b is 114.6 mm, B 1A is 16 degrees, B 2A is 51 degrees and ζi is 41 degrees.

[0021] The technical solution of this utility model imitates the biological structure of bilaterian fish in nature, adding multiple bionic dorsal fins to the curved surface of the blade. The curved surface and the bionic dorsal fins have excellent fluid dynamics performance. Applying these curved surface shapes to axial flow impellers can optimize the fluid dynamics characteristics of the blades, reduce resistance and energy consumption during fluid flow, and thus improve the aerodynamic efficiency and output power of the impeller. At the same time, it has a more reasonable stress and strength distribution, which helps to enhance the structural stability and durability of the axial flow impeller. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0023] Figure 1 A front view of an embodiment of a blade with a bionic dorsal fin provided by the present invention;

[0024] Figure 2 for Figure 1 A partial enlarged view of point A in the middle;

[0025] Figure 3 for Figure 1 Schematic diagram of the segmentation of each radius;

[0026] Figure 4 It is a schematic diagram of the names of the intersection lines of the blade surfaces;

[0027] Figure 5 A diagram of the intersection of curved surfaces at a section ∅930 of an embodiment of a blade with a bionic dorsal fin provided by the present invention;

[0028] Figure 6 A diagram of the intersection of curved surfaces at a section ∅780 of an embodiment of a blade with a bionic dorsal fin provided by the present invention;

[0029] Figure 7 A diagram of the intersection of curved surfaces at a section ∅630 of an embodiment of a blade with a bionic dorsal fin provided by the present invention;

[0030] Figure 8 A diagram of the intersection of curved surfaces at a section ∅480 of an embodiment of a blade with a bionic dorsal fin provided by the present invention;

[0031] Figure 9 This is a diagram of the intersection lines of the curved surfaces at the ∅330 section in an embodiment of a blade with a bionic dorsal fin provided by the present invention.

[0032] In the figure: blade with bionic dorsal fin-100, petiole-1, leaf surface-2, bionic dorsal fin-3, trailing edge-4.

[0033] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0035] In order to better describe and illustrate the embodiments of the present application, reference may be made to one or more drawings, but the additional details or examples used to describe the drawings should not be considered as limiting the scope of the utility model invention of the present application, any of the currently described embodiments or preferred methods.

[0036] In the description of the present invention, it should be noted that the terms "length", "width", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate that the device referred to must have a specific orientation or operate in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0038] Due to design and material limitations, traditional fan blades may suffer from poor aerodynamic performance, heavy weight, and low efficiency. These issues affect the overall performance and application range of the fan, leading to increased operating costs and failing to meet energy conservation and emission reduction requirements.

[0039] In view of this, the present invention proposes a blade with a bionic dorsal fin. Figure 1-8 For an embodiment of a blade with a bionic dorsal fin provided by the present invention, please refer to Figure 1-9A plurality of bionic dorsal fins 3 are provided on the blade surface 2 of the blade 100. The bionic dorsal fins 3 are ribs protruding outward from the blade surface 2. Each rib extends from the front side to the rear side of the blade 100, and from the front side to the rear side of the blade 100, the height of each rib (the distance from the outer edge of the rib to the blade surface 2) increases continuously, and the thickness of each rib increases continuously.

[0040] In the technical solution of the present utility model, by imitating the biological structure design of the polypterus in nature, a plurality of bionic dorsal fins 3 are attached to the curved surface of the blade 2. The curved surface combined with the bionic dorsal fin 3 has excellent fluid dynamics performance. Applying these curved surface shapes to the axial flow impeller can optimize the fluid dynamics characteristics of the blade 100, reduce the resistance and energy consumption during fluid flow, and thus improve the aerodynamic efficiency and output power of the impeller.

[0041] To achieve reasonable stress and strength distribution on blade 100, in one embodiment of the present invention, each bionic dorsal fin 3 is evenly spaced on the same blade surface 2. When blades 100 form an impeller, this helps enhance the structural stability and durability of the axial flow impeller. It should be understood that each bionic dorsal fin 3 is only provided on one side of blade surface 2 of blade 100.

[0042] Furthermore, the blade 100 has an inner side close to its petiole 1 and an outer side away from the petiole 1 . As the width of the blade 100 continues to expand from the inner side to the outer side, the length of each bionic dorsal fin 3 becomes longer in sequence from the inner side to the outer side of the blade 100 .

[0043] In order to make the bionic dorsal fin 3 better adapt to the airflow when the impeller rotates, in one embodiment of the present invention, the bionic dorsal fin 3 is arc-shaped on the blade surface 2 .

[0044] To better reduce the noise generated by the blade 100 during rotation, please refer to Figure 1 and 2 In one embodiment of the present invention, at least part of the trailing edge 4 is serrated. These serrated structures can generate a vortex effect in the fluid, thereby reducing the generation of noise.

[0045] See also Figure 3-9 In one embodiment of the present invention, a bionic design is adopted for the blade surface. When the blade 100 is installed on the impeller, the cross-sectional parameters of the blade 100 at the radius ∅930 are: Cmax is 4.1mm, e is 35.5mm, b is 180.7mm, and B is 0. 1A 2 degrees, B 2A is 37 degrees, ζi is 25 degrees; the cross-sectional parameters of blade 100 at radius ∅780 are: Cmax is 3mm, e is 30.9mm, b is 147.2mm, B 1A 5 degrees, B 2Ais 30 degrees, ζi is 22 degrees; the cross-sectional parameters of blade 100 at radius ∅630 are: Cmax is 3.3mm, e is 30.7mm, b is 137.2mm, B 1A 5 degrees, B 2A is 35 degrees, ζi is 25 degrees; the cross-sectional parameters of blade 100 at radius ∅480 are: Cmax is 3.8mm, e is 39.2mm, b is 126.7mm, B 1A 8 degrees, B 2A is 43 degrees, ζi is 33 degrees; the cross-sectional parameters of blade 100 at radius ∅330 are: Cmax is 4.8mm, e is 49.3mm, b is 114.6mm, B 1A is 16 degrees, B 2A is 51 degrees, ζi is 41 degrees;

[0046] Where Cmax: C is the airfoil thickness, the distance between the normal line of the airfoil centerline and the intersection of the airfoil contour line, that is, the diameter of the airfoil inscribed circle, and the maximum value of the airfoil thickness is called the maximum airfoil thickness Cmax;

[0047] e: Maximum thickness position, the distance from the leading edge of the airfoil to the maximum thickness of the airfoil along the chord direction;

[0048] b: chord length, the length of the chord of the wing;

[0049] B 1A : The airfoil inlet geometric angle is the angle between the tangent line through the leading edge of the airfoil to the airfoil centerline and the forehead line (lower horizontal line);

[0050] B 2A : The airfoil inlet geometric angle is the angle between the tangent line through the four points on the airfoil trailing edge to the airfoil midline and the rear forehead line (upper horizontal line);

[0051] ζi: airfoil installation angle, which is the angle between the chord and the cascade front line.

[0052] It should be noted that the purpose of the bionic curved surface design is to imitate the biological structure design of the polypterus in nature, with multiple bionic dorsal fins 51 attached to the back. The curved surface combined with the bionic dorsal fins 51 on the back can achieve the following effects.

[0053] Improved aerodynamic performance: Bionic surface design mimics the curved shapes of organisms found in nature, such as bird wings and fish fins. These shapes have been selected and evolved over time to exhibit excellent fluid dynamics. Applying these curved shapes to axial flow impellers optimizes the blade's fluid dynamics, reducing flow resistance and energy consumption, thereby improving the impeller's aerodynamic efficiency and output power.

[0054] Noise reduction: The bionic surface design can more effectively control the flow state of the fluid on the blade surface, reducing the occurrence of unstable flow phenomena such as eddy currents and turbulence. These unstable flow phenomena are one of the main causes of fluid machinery noise. Therefore, the bionic surface design helps to reduce the noise level of axial flow impellers, making them more environmentally friendly and energy-saving.

[0055] Enhanced structural stability: Bionic surface designs often have more reasonable stress and strength distribution, which helps enhance the structural stability and durability of axial flow impellers. Under high loads or harsh operating conditions, the bionic surface design can better withstand the impact and vibration of the fluid, thereby extending the service life of the impeller.

[0056] Optimizing flow and pressure distribution: The bionic curved surface design allows for fine-tuning of the blade's curved shape based on actual operating conditions to achieve more uniform flow and pressure distribution. This helps reduce turbulence and backflow within the impeller, improving flow efficiency and stability.

[0057] Broadening the scope of applications: Due to the advantages of bionic surface design in aerodynamic performance, noise control, and structural stability, axial flow impellers can be applied more widely in various fields. For example, in ventilation, air conditioning, and refrigeration, axial flow impellers with bionic surface design can provide more efficient, energy-saving, and environmentally friendly solutions.

[0058] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A leaf having a bionic dorsal fin, having an inner side near its petiole (1) and an outer side away from the petiole (1), characterized in that: A plurality of bionic dorsal fins (3) are provided on the blade surface (2), and the bionic dorsal fins (3) are ribs protruding outward from the blade surface (2), and each rib extends from the front side to the rear side of the blade, and the height and thickness continuously increase.

2. The blade with a bionic dorsal fin according to claim 1, characterized in that: The bionic dorsal fins (3) are distributed at equal intervals on the same leaf surface.

3. The blade with a bionic dorsal fin according to claim 1, characterized in that: The length of each bionic dorsal fin (3) increases in sequence from the inner side to the outer side of the blade.

4. The blade with a bionic dorsal fin according to claim 1, wherein: The bionic dorsal fin (3) is arc-shaped on the leaf surface (2).

5. The blade with a bionic dorsal fin according to claim 1, wherein: The trailing edge (4) of the blade is at least partially tooth-shaped.

6. The blade with a bionic dorsal fin according to claim 1, wherein: When the blade is installed on the impeller, the blade cross-sectional parameters at the radius ∅930 with the impeller rotation axis as the center are: Cmax is 4.1mm, e is 35.5mm, b is 180.7mm, B 1A 2 degrees, B 2A is 37 degrees, ζi is 25 degrees; Where Cmax: C is the airfoil thickness, the distance between the normal line of the airfoil centerline and the intersection of the airfoil contour line, that is, the diameter of the airfoil inscribed circle, and the maximum value of the airfoil thickness is called the maximum airfoil thickness Cmax; e: Maximum thickness position, the distance from the leading edge of the airfoil to the maximum thickness of the airfoil along the chord direction; b: chord length, the length of the chord of the wing; B 1A : The airfoil inlet geometric angle is the angle between the tangent line through the leading edge of the airfoil to the airfoil centerline and the forehead line; B 2A : The airfoil inlet geometric angle is the angle between the tangent line through the airfoil trailing edge point to the airfoil midline and the rear forehead line; ζi: airfoil installation angle, which is the angle between the chord and the cascade front line.

7. The blade with a bionic dorsal fin according to claim 6, characterized in that: When the blade is installed on the impeller, the blade cross-sectional parameters at the radius ∅780 with the impeller rotation axis as the center are: Cmax is 3mm, e is 30.9mm, b is 147.2mm, B 1A 5 degrees, B 2A is 30 degrees and ζi is 22 degrees.

8. The blade with a bionic dorsal fin according to claim 6, characterized in that: The blade section parameters at radius ∅630 are: Cmax is 3.3mm, e is 30.7mm, b is 137.2mm, B 1A 5 degrees, B 2A is 35 degrees and ζi is 25 degrees.

9. The blade with a bionic dorsal fin according to claim 6, wherein: The blade section parameters at radius ∅480 are: Cmax is 3.8mm, e is 39.2mm, b is 126.7mm, B 1A 8 degrees, B 2A is 43 degrees and ζi is 33 degrees.

10. The blade with a bionic dorsal fin according to claim 6, characterized in that: The blade section parameters at radius ∅330 are: Cmax is 4.8mm, e is 49.3mm, b is 114.6mm, B 1A is 16 degrees, B 2A is 51 degrees and ζi is 41 degrees.

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