Stationary blade structure of fan

Abstract

The utility model provides a stationary blade structure of a fan, which comprises a fan frame body, a shaft barrel, a plurality of connecting bodies and a flow guide convex body, the fan frame body comprises a body, a shaft barrel, a plurality of connecting bodies and a flow guide convex body, two sides of the body are respectively provided with a fan air inlet side and a fan air outlet side, and an air flow channel is arranged between the fan air inlet side and the fan air outlet side; the shaft barrel is arranged in the airflow channel; the connectors are connected with the body and the shaft barrel; the flow guide convex body is arranged along the axis of the shaft barrel, the flow guide convex body comprises a bottom and a top connected with the bottom, the bottom is arranged corresponding to the shaft barrel, and the sectional area of the bottom is larger than that of the top, so that the flow guide convex body is in a shape with a wide bottom and a narrow top. The air flow is guided by the flow guide convex body with the wide bottom and the narrow top, so that the air outlet side of the fan frame body is smooth in air outlet, and the effects of reducing turbulence noise and improving aerodynamic efficiency are achieved.

Description

Technical Field

[0001] This utility model relates to a stator blade structure, and more particularly to a stator blade structure for a fan that can reduce turbulence noise. Background Technology

[0002] With the rapid development of modern technology, the advent of digital technology enables electronic products to achieve a wide variety of functions. Some electronic products can cope with many different situations through their own computing power, while others obtain results by connecting to large servers or network communication equipment through the network. The development of modern servers or network communication equipment has greatly improved computing power while also significantly reducing size.

[0003] However, the significant increase in computing power also leads to a significant increase in waste heat, while the substantial reduction in size makes heat dissipation difficult. This is especially true for servers or network communication equipment, which require multiple fans for cooling due to the large volume of data processed. However, conventional fan cooling often suffers from turbulent airflow at the fan exhaust, resulting in noise and poor aerodynamic efficiency. Figure 1 As shown. Utility Model Content

[0004] The purpose of this invention is to provide a fan blade structure that improves the turbulence on the air outlet side by using a guide protrusion to reduce noise and improve efficiency.

[0005] Another objective of this invention is to provide a fan blade structure that can be installed on the air outlet side and has a guide vane.

[0006] To achieve the above objectives, this utility model provides a fan blade structure, characterized in that it includes a fan frame and a guide protrusion, wherein:

[0007] The fan housing includes:

[0008] A main body, with a fan inlet side and a fan outlet side on both sides, and an airflow channel is formed in the main body, which is located between the fan inlet side and the fan outlet side.

[0009] A shaft cylinder, disposed within the airflow passage of the main body, the shaft cylinder being used to pivotally mount a fan wheel; and

[0010] A plurality of connecting bodies connect the main body to the shaft cylinder;

[0011] The guide protrusion is disposed along the axis of the shaft cylinder of the fan frame. The guide protrusion includes a bottom and a top connected to the bottom. The bottom is disposed corresponding to the shaft cylinder. The cross-sectional area of ​​the bottom is larger than the cross-sectional area of ​​the top, so that the guide protrusion has a shape that is wider at the bottom and narrower at the top.

[0012] The shape of this product, which is wide at the bottom and narrow at the top, can be bullet-shaped, conical, hemispherical, or pointed.

[0013] The bottom is connected to the shaft cylinder so that the guide protrusion is integrally formed on the shaft cylinder.

[0014] The bottom is detachably mounted to the shaft cylinder so that the guide protrusion is fixed to the shaft cylinder.

[0015] The bottom is glued and fixed to the shaft.

[0016] The fan wheel and the guide protrusion are respectively provided on both sides of the shaft cylinder. The fan wheel is close to the air inlet side of the fan, and the guide protrusion is close to the air outlet side of the fan.

[0017] A stator frame is disposed on the fan frame. The stator frame has an air inlet side and an air outlet side on its two sides. A guide channel is formed in the stator frame, which is located between the air inlet side and the air outlet side. A plurality of stator blades are disposed in the guide channel. A guide protrusion is located in the guide channel and is connected to the stator frame through the stator blades. The stator frame is connected to the fan outlet side of the fan frame through the air inlet side, so that the bottom of the guide protrusion is connected to the shaft of the fan frame.

[0018] The guide protrusion extends axially from the air inlet side of the stator frame toward the guide channel.

[0019] The volume of the guide protrusion gradually decreases from the air inlet side to the air outlet side.

[0020] The bottom circle of the guide protrusion has a radius of r and a height of h, and the relationship that h is greater than or equal to 2r is satisfied.

[0021] By having the guide protrusion arranged along the axis of the shaft of the fan frame and positioned on the fan outlet side of the fan frame, the airflow from the fan outlet side of the fan frame is smoothed through the guidance of the guide protrusion, thereby reducing noise caused by turbulence and improving aerodynamic efficiency. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a common fan turbulence profile;

[0023] Figure 2 This is a three-dimensional schematic diagram of the stationary blade structure of the fan of this utility model;

[0024] Figure 3 for Figure 2 A three-dimensional schematic diagram of the fan blade structure from another angle;

[0025] Figure 4 for Figure 2 A cross-sectional view of the fan's stator blade structure;

[0026] Figure 5 for Figure 4 A three-dimensional schematic diagram of the guide protrusion in the stator blade structure of a fan;

[0027] Figure 6 This is a three-dimensional exploded view of the still blade structure of another fan according to this utility model;

[0028] Figure 7 for Figure 6 A three-dimensional exploded view of the stator blade structure of another fan from another angle;

[0029] Figure 8 for Figure 6 A three-dimensional schematic diagram of the still blade structure of another fan;

[0030] Figure 9 for Figure 8 A combined cross-sectional view of the stator blade structure of another fan;

[0031] Figure 10 The graphs show the back static pressure-gas flow rate-aerodynamic efficiency curves for the bladeless and bladeless structures of this invention.

[0032] Explanation of reference numerals in the attached drawings: 1-Fan frame; 10-Body; 11-Fan inlet side; 12-Fan outlet side; 13-Airflow channel; 14-Shaft cylinder; 15-Connector; 16-Fan wheel; 2-Stationary blade frame; 21-Inlet side; 22-Outlet side; 23-Guide channel; 25-Stationary blade; 3-Guide protrusion; 30-Bottom; 301-Flat surface; 31-Top; 310-Tip; A-Axis axis; r-Circular radius; h-Height; L1-Back static pressure-gas flow rate curve without stationary blade structure; L2-Back static pressure-gas flow rate curve of this utility model; L3-Gas flow rate-aerodynamic efficiency curve without stationary blade structure; L4-Gas flow rate-aerodynamic efficiency curve of this utility model. Detailed Implementation

[0033] The above-mentioned objectives of this utility model and its structural and functional characteristics will be described with reference to the preferred embodiments shown in the accompanying drawings.

[0034] Please refer to Figures 2 to 5As shown, this utility model provides a fan blade structure, including: a fan frame 1, which includes a body 10, a shaft cylinder 14, a plurality of connecting bodies 15, and a guide protrusion 3. The body 10 has a fan inlet side 11 and a fan outlet side 12 on its two sides respectively. An airflow channel 13 is formed within the body 10, located between the fan inlet side 11 and the fan outlet side 12. The shaft cylinder 14 is disposed within the airflow channel 13 of the body 10. A fan wheel 16 is pivotally mounted; a plurality of connecting bodies 15 connect the body 10 and the shaft cylinder 14; and the guide protrusion 3 is disposed along the axis A of the shaft cylinder 14 of the fan frame 1. The guide protrusion 3 includes a bottom 30 and a top 31 connected to the bottom 30, wherein the bottom 30 is correspondingly connected to the shaft cylinder 14, and the top 31 is disposed away from the shaft cylinder 14. The cross-sectional area of ​​the bottom 30 is larger than the cross-sectional area of ​​the top 31, so that the guide protrusion 3 presents a shape that is wider at the bottom and narrower at the top.

[0035] In this embodiment, the bottom 30 of the guide protrusion 3 has a circular or geometrically shaped plane 301, such as... Figure 5 As shown, the top 31 has a pointed tip 310. The volume of the guide protrusion 3 gradually decreases from the plane 301 to the pointed tip 310 to form a cone-like structure. In this embodiment, this bottom-wide and top-narrow shape can be bullet-shaped to obtain a better guiding effect, but it is not limited to this. Other similar bottom-wide and top-narrow shapes, such as cones, hemispheres, or pointed cones, can also be applied to this invention. Furthermore, in this embodiment, the bottom 30 of the guide protrusion 3 is directly connected to the shaft cylinder 14, so that the guide protrusion 3 is integrally formed on the shaft cylinder 14. At this time, the guide protrusion 3 and the shaft cylinder 14 can be regarded as one piece, so that the connecting bodies 15 connecting the body 10 and the shaft cylinder 14 are equivalent to connecting the body 10 and the guide protrusion 3. Figure 4As shown, the connecting bodies 15 simultaneously connect the body 10, the shaft 14, and the guide protrusion 3. In other embodiments, the connecting bodies 15 may selectively connect only the body 10 and the shaft 14, or only the body 10 and the guide protrusion 3. Since the guide protrusion 3 and the shaft 14 can be considered as one unit, in this utility model, when the term "connecting bodies 15 connect the body 10 and the shaft 14" is used to describe the connection relationship between them, it includes the following three connection states: the connecting bodies 15 simultaneously connect the body 10, the shaft 14, and the guide protrusion 3; the connecting bodies 15 connect the body 10 and the shaft 14; and the connecting bodies 15 connect the body 10 and the guide protrusion 3. However, it is not limited to this. Another option is that the bottom 30 of the guide protrusion 3 is detachably installed on the shaft 14 to achieve the purpose of snapping and fixing the guide protrusion 3 to the shaft 14. Another option is that the guide protrusion 3 can be adhesively fixed to the shaft cylinder 14, and the adhesive method can be a fixing adhesive or ultrasonic bonding. In other words, this utility model does not limit the guide protrusion 3 to be integrally formed on the shaft cylinder 14. The guide protrusion 3 can be a component independent of the shaft cylinder 14, which can be connected and fixed to the shaft cylinder 14 by various fixing means.

[0036] It is worth mentioning that, in order to achieve a better flow guiding effect, the shape of the flow guiding protrusion 3 should preferably not be designed as a flat convex shape; that is, the height of the flow guiding protrusion 3 should preferably not be less than the diameter of the bottom 30 of the flow guiding protrusion 3. Therefore, please refer to... Figure 5 As shown, the bottom radius of the guide protrusion 3 is r, and the height is h, satisfying the relationship that h is greater than or equal to 2r, i.e., h≥2r. This effectively ensures that the shape of the formed guide protrusion 3 is bullet-shaped, conical, or hemispherical, rather than flattened, thereby achieving a better airflow guiding effect. It is understood that since the guide protrusion 3 is detachably mounted on the shaft cylinder 14, this invention has considerable design flexibility, allowing for the design of guide protrusions 3 with different bottom radii and heights to meet the needs of different customers. A suitable size guide protrusion 3 can then be selected and installed on the shaft cylinder 14. Furthermore, the connecting body 15, which connects the fan frame 1 and the shaft cylinder 14, is, in addition to... Figure 4 In addition to the elongated shape shown, it can also be shaped like a still leaf, thereby achieving a better flow guiding effect.

[0037] Furthermore, it is understood that the fan wheel 16 and the guide protrusion 3 are respectively provided on both sides of the shaft cylinder 14, such as Figure 4As shown, the fan wheel 16 is positioned upstream of the airflow, while the guide protrusion 3 is positioned downstream. Furthermore, in this embodiment, the shaft cylinder 14 is approximately located midway between the fan inlet side 11 and the fan outlet side 12. The fan wheel 16 is closer to the fan inlet side 11, and the guide protrusion 3 is closer to the fan outlet side 12. Both the fan wheel 16 and the guide protrusion 3 are enclosed and protected by the body 10. However, this is not the only possibility. In other embodiments, the shaft cylinder 14 may also be designed to be positioned closer to the fan outlet side 12 to accommodate the space configuration of the larger fan wheel 16, and the guide protrusion 3 may be designed to protrude beyond the fan outlet side 12, thus giving the fan frame 1 a clear structural orientation.

[0038] Please refer to Figures 6 to 9 As shown, this utility model provides another fan blade structure, including: a fan frame 1 and a blade holder 2 connected to the fan frame 1. The fan frame 1 includes a body 10, a shaft cylinder 14, and a plurality of connecting bodies 15, while the blade holder 2 includes a guide protrusion 3. The main difference between this fan blade structure and the fan blade structure described above is that the guide protrusion 3 is disposed on the blade holder 2 instead of the fan frame 1. Therefore, the guide protrusion 3 is not directly connected to the shaft cylinder 14, but only makes corresponding contact with the shaft cylinder 14.

[0039] In this embodiment, similarly, the main body 10 of the fan frame 1 is provided with a fan inlet side 11 and a fan outlet side 12 on each side. An airflow channel 13 is provided between the fan inlet and outlet sides 11 and 12. A shaft cylinder 14 extends from the airflow channel 13 near the fan outlet side 12 and is connected to the fan frame 1 through a plurality of connectors 15. A fan wheel 16 is pivotally mounted on the outside of the shaft cylinder 14.

[0040] The stator frame 2 is assembled on the fan frame 1 to form a series fan. The stator frame 2 has an air inlet side 21 and an air outlet side 22 on each side. A guide channel 23 is formed in the stator frame 2. The guide channel 23 is located between the air inlet side 21 and the air outlet side 22. A plurality of stator blades 25 are provided in the guide channel 23. The guide protrusion 3 is located in the guide channel 23 and is connected to the stator frame 2 through the stator blades 25. The stator frame 2 is connected to the fan outlet side 12 of the fan frame 1 through the air inlet side 21, so that the bottom 30 of the guide protrusion 3 is connected to the shaft cylinder 14 of the fan frame 1.

[0041] In this embodiment, the guide protrusion 3 extends axially from the air inlet side 21 of the stator frame 2 towards the guide channel 23, and the volume of the guide protrusion 3 gradually decreases from the air inlet side 21 to the air outlet side 22, so that the guide protrusion 3 presents a conical structure with a wider bottom and a narrower top. Similarly, this shape with a wider bottom and a narrower top can be bullet-shaped to obtain a better guiding effect, but it is not limited to this. Other similar shapes with a wider bottom and a narrower top, such as conical or hemispherical shapes, can also be applied to this utility model.

[0042] By placing the stator frame 2 on the fan outlet side 12 of the fan frame 1, and providing the guide protrusion 3 and a plurality of stator blades 25 within the guide channel 23 of the stator frame 2, the airflow from the fan outlet side 12 to the air inlet side 21 of the stator frame 2 is guided by the guide protrusion 3 and each stator blade 25, ensuring smooth airflow from the outlet side 22 of the stator frame 2. This achieves the effect of reducing noise caused by turbulence and improving aerodynamic efficiency. Figure 9 As shown.

[0043] Please refer to Figure 10 As shown, the graph illustrates the back static pressure-gas flow rate-aerodynamic efficiency curves of the fan with and without the blade structure of this invention. A comparison of curves L1, L2, L3, and L4 in the graph shows that the present invention with the added blade structure has superior back static pressure and aerodynamic efficiency compared to the bladeless structure. Therefore, by placing this blade structure on the fan outlet side of the fan unit, and by providing a guide protrusion and multiple blades within the guide channel of the blade structure, the airflow from the fan outlet side to the inlet side of the blade unit is guided by the guide protrusion and the blades, ensuring smooth airflow at the outlet side of the blade unit, thereby reducing turbulence noise and improving efficiency.

[0044] The present invention has been described in detail above. However, the above description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. All equivalent variations and modifications made based on the present invention should still fall within the patent coverage of the present invention.

Claims

1. A vane structure of a fan, characterized by comprising: The fan frame body and a flow guide protrusion are included, wherein: The fan frame body includes: A body, two sides of the body are respectively provided with a fan air inlet side and a fan air outlet side, and an airflow passage is formed in the body between the fan air inlet side and the fan air outlet side; A shaft cylinder is arranged in the airflow passage in the body, and the shaft cylinder is used to pivotally arrange a fan wheel; A plurality of connecting bodies are connected between the body and the shaft cylinder; The flow guide protrusion is arranged along the axis of the shaft cylinder of the fan frame body, and the flow guide protrusion includes a bottom and a top connected to the bottom, the bottom is arranged corresponding to the shaft cylinder, and the cross-sectional area of the bottom is greater than that of the top, so that the flow guide protrusion has a bottom wide and top narrow shape.

2. The fan vane structure of claim 1, wherein: The bottom wide and top narrow shape is a bullet shape, a conical shape, a hemispherical shape or a pointed cone shape.

3. The fan vane structure of claim 1, wherein: The bottom is connected to the shaft cylinder, so that the flow guide protrusion is integrally formed on the shaft cylinder.

4. The fan vane structure of claim 1, wherein: The bottom is detachably mounted on the shaft cylinder, so that the flow guide protrusion is fixed on the shaft cylinder.

5. The fan vane structure of claim 1, wherein: The bottom is adhesively fixed on the shaft cylinder.

6. The fan vane structure of claim 1, wherein: The two sides of the shaft cylinder are respectively provided with the fan wheel and the flow guide protrusion, the fan wheel is close to the fan air inlet side, and the flow guide protrusion is close to the fan air outlet side.

7. The fan vane structure of claim 1, wherein Further includes: A stator frame body is arranged on the fan frame body, the stator frame body has an air inlet side and an air outlet side on two sides, an airflow passage is formed in the stator frame body between the air inlet side and the air outlet side, a plurality of stator blades are arranged in the airflow passage, the flow guide protrusion is arranged in the airflow passage and connected to the stator frame body through the plurality of stator blades, and the stator frame body is connected to the fan air outlet side of the fan frame body through the air inlet side, so that the bottom of the flow guide protrusion is connected to the shaft cylinder of the fan frame body.

8. The fan vane structure of claim 7, wherein: The flow guide protrusion extends axially from the air inlet side of the stator frame body to the airflow passage.

9. The fan vane structure of claim 7, wherein: The volume of the flow guide protrusion gradually decreases from the air inlet side to the air outlet side.

10. The vane structure of a fan according to any one of claims 1 to 9, characterized in that: The bottom surface of the flow guide protrusion has a radius of r and a height of h, and the relationship of h being greater than or equal to 2r is satisfied.

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