Wing-shaped fan blade, fan and machining process of wing-shaped fan blade

Abstract

The invention discloses a wing-shaped fan blade, a fan and a machining process of the wing-shaped fan blade. The wing-shaped fan blade comprises a hub and a plurality of blades formed on the periphery of the hub. A plurality of grooves are formed in the upper end face and the lower end face of each blade. The width of the blades is gradually increased from the air inlet to the air outlet, so that the air sweeping area of the fan is increased. The invention has the technical effects and advantages that: the grooves can disperse airflow to different directions, so that the vibration of air is reduced, the air flow becomes soft, the sound is naturally reduced, and the silencing effect is achieved. The method has the advantages that'noisy 'uncomfortable sound is effectively reduced, experiments show that projection peak in FFT (fast fourier transform) is obviously reduced on a spectrogram, and the projection rate P / R is obviously reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of centrifugal fan processing, and more particularly to a fan blade with a wing shape, a fan and a processing technology thereof. Background Art

[0002] Today's laptops are all high-performance and high-power, requiring fans to provide greater performance to dissipate heat. This requires fans to be designed with more blades to improve fan performance. However, high-density fan blades will increase noise, giving users a "very noisy" and uncomfortable sound experience.

[0003] Therefore, there is an urgent need for a centrifugal fan that can maintain the original heat dissipation performance of the fan and enhance the user's good experience of the low-noise fan. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a fan with wing-shaped blades and a processing technology thereof.

[0005] The technical solutions of the present invention are as follows: A first aspect of the present invention provides a fan blade having a wing shape, comprising a hub and a plurality of blades formed on the outer periphery of the hub; a plurality of grooves are formed on the upper and lower end surfaces of each blade.

[0006] The width of the blades gradually increases from the air inlet to the air outlet, thereby increasing the wind sweeping area of ​​the fan.

[0007] The grooves are distributed in a circumferential manner.

[0008] The specifications of the wing-shaped fan blades are: a fan blade angle of 80-120 degrees, 30-150 blades, and a blade spacing of 0.3-3 mm.

[0009] The fan blade angle is 100 degrees, the number of fan blades is 101, the minimum blade spacing is 0.53mm, and the maximum blade spacing is 1.66mm.

[0010] The outer ends of the blades are connected by circular reinforcement plates.

[0011] A second aspect of the present invention provides a fan having wing-shaped blades, wherein the fan blades are wing-shaped blades.

[0012] A third aspect of the present invention provides a method for processing a fan blade having a wing shape, comprising the following steps: S1. Select injection molding material; S2. Use an injection molding machine to injection mold the fan blades; S3. Processing grooves on the blades.

[0013] The groove and the fan blade are integrally injection-molded.

[0014] The groove is formed on the blade by CNC processing.

[0015] The plastic particle model of the injection molding material is LCP.

[0016] Technical effects and advantages of the present invention: 1. The grooves can disperse the airflow in different directions, reducing the vibration of the air. The air flow becomes softer, the sound is naturally smaller, and it has a noise-absorbing effect.

[0017] 2. Through experiments, we found that the peaks in the FFT spectrum were significantly reduced, and the protrusion ratio (P / R) was significantly reduced, effectively reducing the "loud" and uncomfortable sound. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the present invention as a whole; Figure 2 for Figure 1 Schematic diagram of the structure at A in the middle; Figure 3 A structural diagram of another perspective of the present invention; Figure 4 This is a plan view of the present invention; Figure 5 To improve the peak difference graph before and after; Figure 6 To improve the front and rear protrusion ratio P / R diagram. DETAILED DESCRIPTION

[0019] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention. Example

[0020] The first aspect of the present invention provides a fan blade having a wing shape, such as Figures 1 to 3 As shown, it includes a hub 1 and a plurality of blades 2 formed on the outer periphery of the hub; a plurality of grooves 3 are formed on the upper and lower end surfaces of each blade.

[0021] Preferably, the width of the blades gradually increases from the air inlet a to the air outlet b, thereby increasing the wind sweeping area of ​​the fan.

[0022] Preferably, Figure 4 As shown in the dotted circle, the grooves are distributed in a circular pattern, and there are 8 circles of circumferentially distributed grooves, each circle being equidistantly distributed in the diameter direction.

[0023] Preferably, the specifications of the wing-shaped fan blades are: the fan blade angle (the angle between the hub and the blade) is 80-120 degrees, the number of blades is 30-150, and the blade spacing is 0.3-3mm.

[0024] Preferably, the outer ends of the blades 2 are connected via circular reinforcement plates 4 .

[0025] Preferably, a plurality of soil filling grooves 5 are provided on the hub 1 for counterweighting the fan blades for dynamic balancing. Example

[0026] The second aspect of the present invention provides a fan with wing-shaped blades, wherein the fan blades are wing-shaped blades. A connecting seat 6 is provided at the center of the hub, and the connecting seat is connected to the power shaft and then placed in the housing to form the fan. Example

[0027] A third aspect of the present invention provides a method for processing a fan blade having a wing shape, comprising the following steps: S1. Select injection molding material; S2. Use an injection molding machine to injection mold the fan blades; S3. Processing grooves on the blades.

[0028] Preferably, the groove and the fan blade are integrally injection molded.

[0029] Preferably, the groove is formed on the blade by CNC processing.

[0030] Preferably, the plastic particle model of the injection molding material is LCP. Example

[0031] like Figure 4 As shown, the fan blade angle is 100 degrees, the number of fan blades is 101, the minimum blade spacing is 0.53mm, and the maximum spacing is 1.66mm. There are 8 circles of circumferentially distributed grooves, and each circle is equidistantly distributed in the diameter direction.

[0032] like Figure 5 indivual Figure 6 As shown in the figure, when designing the fan blades, spoiler grooves are added to the upper and lower end surfaces of the blades. Through experiments, it is found that the protruding peak in the FFT shown in the spectrum diagram is significantly reduced, and the protrusion ratio P / R is significantly reduced.

[0033] Explanation in the figure: FFT (Fourier transform); peak in FFT (protruding peak in FFT); P / R (full name Prominence Ratio), prominence rate.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fan blade having a wing shape, characterized in that: The utility model comprises a hub and a plurality of blades formed on the outer periphery of the hub; the upper and lower end surfaces of each blade are provided with a plurality of grooves.

2. The wing-shaped fan blade according to claim 1, characterized in that: The width of the blades gradually increases from the air inlet to the air outlet, thereby increasing the wind sweeping area of ​​the fan.

3. The wing-shaped fan blade according to claim 1, characterized in that: The grooves are distributed in a circumferential manner.

4. The wing-shaped fan blade according to claim 1, characterized in that: The specifications of the wing-shaped fan blades are: a fan blade angle of 80-120 degrees, 30-150 blades, and a blade spacing of 0.3-3 mm.

5. The wing-shaped fan blade according to claim 4, characterized in that: The fan blade angle is 100 degrees, the number of fan blades is 101, the minimum blade spacing is 0.53mm, and the maximum blade spacing is 1.66mm.

6. The wing-shaped fan blade according to claim 1, characterized in that: The outer ends of the blades are connected by circular reinforcement plates.

7. A fan having wing-shaped blades, characterized in that: The fan blades are the wing-shaped fan blades described in any one of claims 1 to 6.

8. A method for processing a fan blade having a wing shape, characterized in that: The following steps are involved: S1. Select injection molding material; S2. Use an injection molding machine to injection mold the fan blades; S3. Processing grooves on the blades.

9. The method for processing a fan blade having a wing shape according to claim 8, characterized in that: The groove and the fan blade are integrally injection-molded.

10. The method for processing a fan blade having a wing shape according to claim 8, characterized in that: The groove is formed on the blade by CNC processing.

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