Ultra-silence cooling fan blade and cooling fan

Abstract

The ultra-silence cooling fan blade comprises a fan blade seat and a plurality of blades, the fan blade seat is of a hollow structure with one face open, and the blades are arranged on the cylindrical face of the fan blade seat. Triangular or triangle-like protrusions or pits are evenly arranged on the surfaces of the blades in the wind cutting direction and the wind outlet direction in an array mode. According to the ultra-silence cooling fan blade and the cooling fan, the triangular or triangle-like protrusions or pits are designed on the blade surface of the fan blade in an array mode, tiny turbulent flow can be formed on the surfaces of the protrusions or the pits when the fan runs, and the turbulent flow is evenly formed; the fluid is blown out by being attached to the surface more tightly, so that the low-pressure area is reduced, the resistance is reduced, the airflow is more stable, and the air supply distance is farther; and resonance can be inhibited, and noise is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat dissipation fan, in particular to a super-silence heat dissipation fan blade and heat dissipation fan. BACKGROUND

[0002] The conventional heat dissipation fan is prone to cause noise superposition due to resonance when running, and the noise is larger. The surface of the fan blade is smooth, and the fluid is easy to quickly separate after passing through the blade, forming a low pressure area, which causes the resistance to increase greatly, reduces the wind speed and reduces the air supply distance. The unreasonable design of the blade causes uneven turbulence, increases the resistance and causes additional noise.

[0003] Therefore, it is necessary to solve the above technical problems. SUMMARY

[0004] The present application provides a super-silence heat dissipation fan blade and heat dissipation fan to solve the above technical problems. Triangular or triangular-shaped protrusions or pits are designed on the surface of the fan blade. When the fan is running, a small turbulence is formed on the surface of the protrusion or pit, and the turbulence is uniformly formed. The fluid is blown out more closely to the surface, thereby reducing the low pressure area, reducing the resistance, and the airflow is more stable, and the air supply distance is farther. The occurrence of resonance can also be inhibited, and the noise is reduced.

[0005] To achieve the above purpose, the technical scheme of the present application is as follows: A super-silence heat dissipation fan blade, comprising a blade seat and a plurality of blades, the blade seat is a hollow structure with an open surface, a plurality of blades are arranged on the cylindrical surface of the blade seat, and triangular or triangular-shaped protrusions or pits are uniformly arranged on the surface of the blades along the cutting wind direction and the air outlet direction.

[0006] The triangular or triangular-shaped protrusions or pits on the surface of the blade of the super-silence heat dissipation fan blade serve to improve the wind power (optimal design of aerodynamics) and blow the wind farther after passing through the air duct. When the fan is running, a small turbulence is formed on the surface of the protrusion or pit, and the turbulence is uniformly formed. The fluid is blown out more closely to the surface, thereby reducing the low pressure area, reducing the resistance, and the airflow is more stable, and the air supply distance is farther. The occurrence of resonance can also be inhibited, and the noise is reduced.

[0007] Further optimization scheme, the height of the triangular protrusion is 0.1-0.5mm, the edge length is 1-3mm, and the distance between adjacent protrusions is 2-5mm. The triangular protrusion with the size can more effectively enhance the wind pressure stability.

[0008] Further optimization scheme, the vertex of the triangular protrusion along the air outlet direction of the blade surface is directed to the blade rotation direction, and the bottom angle of the protrusion is 30°-60°. The triangular protrusion is beneficial to optimize the generation of turbulence and reduce the risk of boundary layer separation.

[0009] Further optimization scheme, the other side of the blade corresponding to the cutting wind direction is provided with a plurality of tooth structure. The tooth structure increases the blade surface area, enhances the aerodynamic effect, improves the torque and lift of the blade, thereby improving the efficiency and performance of the fan; the tooth structure on the blade can also improve the stability of the fan blade, change the structure of the fan blade, and the fan blade can rotate more stably and is not prone to instability phenomena such as distortion; the tooth structure can also reduce the turbulence generated by the fluid, thereby reducing the generation of noise.

[0010] Further optimization scheme, the outer edge of the blade is a wavy streamline profile. The wavy streamline profile simulates the structure design of butterfly wings. It can be seen from the simulation software that there is a noise source at the outermost periphery of the blade. Now the wing structure is designed to further reduce noise.

[0011] Further optimization scheme, the hub surface of the fan blade is provided with a conical thread structure. When the fluid flows through the fan blade, the conical thread structure on the hub surface makes the fluid adhere to the wall, ensuring smoothness, reducing turbulence and vortex, thereby reducing noise; the conical thread can better disperse the centrifugal force generated by the fan, reducing vibration.

[0012] Further optimization scheme, the triangular-shaped protrusion is a trapezoidal protrusion or a protrusion similar to the shape of a shark body. The trapezoidal protrusion or the protrusion similar to the shape of a shark body also has the effect of reducing air resistance and enhancing wind pressure stability, increasing the air supply distance.

[0013] A heat dissipation fan comprising the super-silent heat dissipation fan blade of any of the above.

[0014] Further optimization scheme, further comprising a rotor shaft core and a stator assembly; the fan blade seat is arranged around the stator assembly and is fixed at the center of the rotor shaft core; a motor shell is arranged on the inner cylindrical surface of the fan blade seat, and a plurality of magnetic strips are arranged in the motor shell.

[0015] Further optimization scheme, further comprising an oil-containing bearing, the rotor shaft core is arranged through the shaft hole of the oil-containing bearing, one end of the rotor shaft core is provided with a shaft core buckle to position the oil-containing bearing, and an anti-friction washer is arranged between the shaft core buckle and the oil-containing bearing. The arrangement of the oil-containing bearing and the anti-friction washer is beneficial to reduce friction when the rotor rotates and reduce noise.

[0016] Compared with the prior art, the super-silent heat dissipation fan blade and the heat dissipation fan of the present application have the following technical advantages: 1. Reduce noise, reduce noise by 5-10dB under the same air volume, and reduce high-frequency noise by more than 30%; 2. Improve wind pressure, increase wind pressure by 15-20% for the same power fan, and increase air supply distance by 25%. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a perspective view of a first embodiment of the fan blade of the present application; Figure 2 is Figure 1 a perspective view from another angle; Figure 3 is Figure 1 a front view of the fan blade; Figure 4 is Figure 3 a left side view of the fan blade; Figure 5 is Figure 3 a top view of the fan blade; Figure 6 is a perspective view of a second embodiment of the fan blade of the present application; Figure 7 is a perspective view of a third embodiment of the fan blade of the present application; Figure 8 is Figure 7 a perspective view from another angle; Figure 9 is a cross-sectional view of a fan of the present application; Figure 10 is a detailed view of the structure of the fan of the present application; Figure 9 In the drawings: fan blade 10, protrusion 11, fan blade seat 12, toothed structure 13, threaded structure 14, blade 1a, rotor shaft core 20, stator assembly 30, silicon steel sheet 31, winding 32, circuit board 33, motor housing 40, magnetic strip 50, oil-containing bearing 60, shaft core retaining ring 70, anti-friction washer 80, outer frame 90, mounting hole 91.

[0018] DETAILED DESCRIPTION

[0019] The present application will be further described in detail below with reference to the embodiments in the drawings.

[0020] As shown in FIG. 1, a first embodiment of the fan blade of the present application is shown. As shown in FIG. 2, a second embodiment of the fan blade of the present application is shown. As shown in FIG. 3 and FIG. 4, a third embodiment of the fan blade of the present application is shown. As shown in FIG. 5 and FIG. 6, a specific embodiment of the fan of the present application is shown. Figures 1 to 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10

[0021] As shown in FIG. 1, a first embodiment of the fan blade of the present application is shown. As shown in FIG. 2, a second embodiment of the fan blade of the present application is shown. As shown in FIG. 3 and FIG. 4, a third embodiment of the fan blade of the present application is shown. As shown in FIG. 5 and FIG. 6, a specific embodiment of the fan of the present application is shown. Figures 1 to 5 ​​​​​​​As shown, the fan blade 10 of the first embodiment of the super-silent cooling fan comprises a fan blade base 12 and a plurality of blades 1a. The fan blade base 12 is a hollow structure with an open surface. The plurality of blades 1a are arranged on the cylindrical surface of the fan blade base 12. The surface of the blade 1a is uniformly arrayed with triangular or triangular-like protrusions 11 along the air cutting direction and the air outlet direction.

[0022] The triangular or triangular-like protrusions 11 on the surface of the blade 1a of the super-silent cooling fan fan blade 10 serve to increase the wind power, so that the air is blown further after passing through the air duct. When the fan is running, a small turbulent flow is formed on the surface of the protrusion 11, and the turbulent flow is uniformly formed, so that the fluid is blown out more closely to the surface, thereby reducing the low pressure area, reducing the resistance, the airflow is more stable, the air supply distance is farther, and the resonance is inhibited, and the noise is reduced.

[0023] As shown in Figure 1 and Figure 2 , the other side of the blade 1a corresponding to the air cutting direction is provided with a plurality of tooth-like structures 13. The tooth-like structure increases the surface area of the blade 1a, enhances the aerodynamic effect, improves the torque and lift of the blade 1a, thereby improving the efficiency and performance of the fan. The tooth-like structure on the blade 1a can also improve the stability of the fan blade, change the structure of the fan blade, and make the fan blade more stable during rotation and less likely to twist and other unstable phenomena. The tooth-like structure can also reduce the turbulent flow generated by the fluid, thereby reducing the generation of noise.

[0024] The height of the triangular protrusion 11 is 0.1-0.5mm, the edge length is 1-3mm, and the distance between adjacent protrusions 11 is 2-5mm. Specifically, the height of the triangular protrusion 11 is 0.3mm, the edge length is 2x2x1.6mm, and the distance between adjacent protrusions 11 is 3mm. The triangular protrusion 11 with this size can more effectively enhance the stability of the wind pressure. Tests show that at a speed of 3000rpm, the noise is 28dB(A), the air volume is increased by 18%, and the wind pressure is increased by 22%.

[0025] In addition, as shown in Figure 3 , the triangular protrusions 11 on the outer ring side of the blade 1a are smaller in shape than the protrusions 11 on the inner ring side.

[0026] The triangular protrusions 11 are uniformly distributed on the surface of the blade 1a, and their geometric parameters (height, edge length, and spacing) can be optimized by fluid mechanics simulation. They generate uniform micro-turbulent flow in the boundary layer, inhibit airflow separation and reduce resistance, and improve wind pressure and air supply distance.

[0027] As shown in Figure 1 , the vertices of the triangular protrusions 11 on the surface of the blade 1a along the air outlet direction are directed towards the rotation direction of the blade 1a. Specifically, as shown in Figure 3As shown, the apexes of the triangular protrusions 11 on the air outlet surface of the blade 1a are located on the same torus, and the apexes of the triangular protrusions 11 on the side surface of the blade 1a are located on the same torus. The triangular protrusions 11 are arranged in this way to facilitate optimization of turbulence generation and reduction of the risk of boundary layer separation.

[0028] The fan blade 10 is made of light composite material and coated with a nanoscale hydrophobic coating, which is conducive to further reducing air friction noise.

[0029] From Figure 1 Or Figure 3 As shown from the direction shown, the fan blade 10 of the ultra-quiet cooling fan of the first embodiment rotates in the counterclockwise direction.

[0030] As shown in Figure 6 The fan blade 10 of the ultra-quiet cooling fan of the second embodiment is different from the first embodiment in that the fan blade 10 rotates in the clockwise direction from the direction shown.

[0031] In addition, the fan blade 10 of the ultra-quiet cooling fan of the present application can also be provided with triangular protrusions 11, which are trapezoidal protrusions 11 or protrusions 11 similar to the shape of a shark body. The trapezoidal protrusions 11 or protrusions 11 similar to the shape of a shark body also have the effect of enhancing the stability of the air pressure and increasing the air supply distance.

[0032] As shown in Figure 7 And Figure 8 The fan blade 10 of the ultra-quiet cooling fan of the third embodiment of the present application is different from the first embodiment in that the outer edge of the blade 1a is a wavy streamline profile 15 and the hub surface of the fan blade is provided with a tapered thread structure 14. The wavy streamline profile simulates the structure of butterfly wings. As can be seen from the simulation software, there is a noise source at the outermost periphery of the fan blade. Now the wing structure is designed to further reduce noise. When the fluid flows through the fan blade, the tapered thread structure on the hub surface makes the fluid adhere to the wall, ensuring smoothness, reducing turbulence and vortex, and thus reducing noise; the tapered thread can better disperse the centrifugal force generated by the fan, reducing vibration.

[0033] The present application also discloses a cooling fan comprising the ultra-quiet cooling fan blade 10 of one of the first embodiment, the second embodiment or the third embodiment.

[0034] As shown in Figure 9 And Figure 10 The cooling fan further comprises a rotor shaft core 20 and a stator assembly 30; the fan blade seat 12 is arranged around the stator assembly 30 and is fixed at the center of the rotor shaft core 20; a motor shell 40 is arranged on the inner cylindrical surface of the fan blade seat 12, and a plurality of magnetic strips 50 are arranged in the motor shell 40.

[0035] AsFigure 9 and Figure 10 As shown in the figure, the heat dissipation fan further comprises an oil-impregnated bearing 60, the rotor shaft core 20 is arranged through the shaft hole of the oil-impregnated bearing 60, one end of the rotor shaft core 20 is provided with a shaft core snap ring 70 for positioning the oil-impregnated bearing 60, and a friction preventing washer 80 is arranged between the shaft core snap ring 70 and the oil-impregnated bearing 60. The arrangement of the oil-impregnated bearing 60 and the friction preventing washer 80 is beneficial to reduce the friction when the rotor rotates and reduce the noise.

[0036] As shown in the figure, the stator assembly 30 comprises a silicon steel sheet 31, a winding 32 and a circuit board 33. The heat dissipation fan further comprises an outer frame 90, and two mounting holes 91 are arranged on two surfaces of the outer frame 90 for fixing the fan. Figure 10

[0037] The fan blade and the heat dissipation fan can form micro turbulence on the surface of the protrusion when the fan operates, and the turbulence is uniformly formed; the fluid is more closely blown out along the surface, so that the low pressure area and the resistance are reduced, the airflow is more stable, the air supply distance is farther, the resonance is inhibited, and the noise is reduced.

[0038] In summary, the present application is as described in the specification and the drawings, and the actual sample is made and tested for many times. According to the test effect, it is proved that the present application can achieve the expected purpose, and the practicability is self-evident. The above-mentioned examples are only used to facilitate the description of the content of the present application, and are not limited in form; any person skilled in the art without departing from the technical features and similar features of the present application, using the equivalent embodiments of the disclosed technical content for partial changes or modifications, all belong to the protection scope of the present application.​

Claims

1. An ultra-quiet cooling fan blade, comprising a blade seat (12) and a plurality of blades (1a), wherein the blade seat (12) is a hollow structure with one side open, and the plurality of blades (1a) are arranged on the cylindrical surface of the blade seat (12), characterized in that: The surface of the blade (1a) is provided with triangular or quasi-triangular protrusions (11) or recesses in a uniform array along the wind cutting direction and the wind outlet direction.

2. The ultra-quiet cooling fan blade according to claim 1 is characterized in that: The height of the triangular protrusion (11) is 0.1 to 0.5 mm, the side length is 1 to 3 mm, and the spacing between adjacent protrusions (11) is 2 to 5 mm.

3. The ultra-quiet cooling fan blade according to claim 1 is characterized in that: The apex of the triangular protrusion (11) on the surface of the blade (1a) along the air outlet direction faces the rotation direction of the blade (1a), and the bottom angle of the protrusion (11) is 30° to 60°.

4. The ultra-quiet cooling fan blade according to claim 1 is characterized in that: A plurality of tooth-shaped structures (13) are provided on the other side of the blade (1a) corresponding to the wind cutting direction.

5. The ultra-quiet cooling fan blade according to claim 1 is characterized in that: The outer edge of the blade (1a) is a wavy streamlined profile.

6. The ultra-quiet cooling fan blade according to claim 1 is characterized in that: The hub surface of the fan blade is provided with a tapered thread structure (14).

7. The ultra-quiet cooling fan blade according to claim 1 is characterized in that: The triangular-shaped protrusion (11) is a trapezoidal protrusion (11) or a protrusion (11) similar in shape to a shark's body.

8. A cooling fan, characterized in that: It comprises the ultra-quiet cooling fan blade (10) according to any one of claims 1 to 5.

9. The heat dissipation fan according to claim 8, wherein: It also includes a rotor shaft core (20) and a stator assembly (30); the fan blade seat (12) is arranged around the stator assembly (30), and its center is fixed on the rotor shaft core (20); a motor housing (40) is provided on the inner cylindrical surface of the fan blade seat (12), and a plurality of magnetic strips (50) are provided in the motor housing (40).

10. The heat dissipation fan according to claim 9, wherein: It also includes an oil-containing bearing (60), the rotor shaft core (20) is arranged to pass through the shaft hole of the oil-containing bearing (60), one end of the rotor shaft core (20) is provided with a shaft core retaining ring (70) to position the oil-containing bearing (60), and an anti-friction washer (80) is provided between the shaft core retaining ring (70) and the oil-containing bearing (60).

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