Stationary blade structure of fan

By setting a flow convex with a wide bottom and narrow top on the fan or static vane frame, the problem of turbulent flow field on the fan outlet side is solved, and the effect of reducing noise and improving aerodynamic efficiency is achieved.

CN120351184APending Publication Date: 2025-07-22ASIA VITAL COMPONENTS CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202510579611.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-05-07
Publication Date
2025-07-22

AI Technical Summary

Technical Problem

The waste heat generated by modern servers or network communication equipment under high computing power makes it difficult to dissipate heat, and the fan outlet is prone to chaotic flow fields, resulting in noise and poor fan aerodynamic efficiency.

Method used

The flow convex structure is adopted, designed to be a wide bottom and narrow top shape, and is arranged on the fan frame or static blade frame. The flow convex extends along the axis to guide the airflow, reduce turbulent noise and improve aerodynamic efficiency.

Benefits of technology

Through the design of the flow guide convex body, the turbulent noise on the fan air outlet side is reduced, the aerodynamic efficiency is improved, and a smoother air flow guidance is achieved.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN120351184A_ABST
    Figure CN120351184A_ABST
Patent Text Reader

Abstract

The invention 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.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The present invention relates to a stator vane structure, and particularly to a stator vane structure of a fan capable of reducing turbulent noise. Background Art

[0002] With the rapid development of modern technology, the advent of digital technology enables electronic products to achieve a variety of functions. Some electronic products rely on their own computing power to handle many different situations, while some electronic products obtain results through network connection to large servers or network communication devices for computing; the development of modern servers or network communication devices has greatly improved the computing power while significantly reducing the volume.

[0003] However, because the substantial improvement in computing power will also cause a significant increase in waste heat, and the substantial reduction in volume will lead to difficult heat dissipation. Especially for servers or network communication devices due to a large amount of computing data, multiple fans need to be installed for heat dissipation. However, for general fan heat dissipation, the flow field at the rear air outlet of the fan is prone to disorder, resulting in noise generation and poor aerodynamic efficiency of the fan, as Figure 1 shown. Summary of the Invention

[0004] The purpose of the present invention is to provide a stator vane structure of a fan, which improves the turbulent flow situation on the air outlet side through a flow guiding convex body to achieve the effects of reducing noise and improving efficiency.

[0005] Another purpose of the present invention is to provide a stator vane structure of a fan that can be installed on the air outlet side and has a flow guiding convex body.

[0006] To achieve the above purposes, the present invention provides a stator vane structure of a fan, characterized in that it includes a fan housing and a flow guiding convex body, wherein:

[0007] The fan housing includes:

[0008] A body, on both sides of which there are respectively a fan air inlet side and a fan air outlet side, and an air flow channel is formed in the body, and the air flow channel is located between the fan air inlet side and the fan air outlet side;

[0009] A shaft cylinder, disposed in the air flow channel in the body, and the shaft cylinder is used for pivotally mounting a fan wheel; and

[0010] A plurality of connecting bodies, connecting the body and the shaft cylinder;

[0011] The flow guiding convex body is arranged along the axis of the shaft cylinder of the fan housing. The flow guiding convex body includes a bottom and a top connected to the bottom. The bottom corresponds to the shaft cylinder, and the cross-sectional area of the bottom is larger than that of the top, so that the flow guiding convex body presents a shape with a wide bottom and a narrow top.

[0012] The shape with a wider bottom and a narrower top is bullet-shaped, conical, hemispherical or pyramidal.

[0013] The bottom is connected to the shaft cylinder so that the flow guiding convex body is integrally formed on the shaft cylinder.

[0014] The bottom is detachably mounted on the shaft cylinder so that the flow guiding convex body is fixed on the shaft cylinder.

[0015] The bottom is adhesively fixed to the shaft cylinder.

[0016] The fan wheels and the flow guiding convex bodies are respectively arranged on two sides of the shaft cylinder. The fan wheels are close to the air inlet side of the fan, and the flow guiding convex bodies are close to the air outlet side of the fan.

[0017] A stationary blade frame is arranged on the fan frame. Two sides of the stationary blade frame respectively have an air inlet side and an air outlet side. A flow guiding channel is formed in the stationary blade frame. The flow guiding channel is located between the air inlet side and the air outlet side. A plurality of stationary blades are arranged in the flow guiding channel. The flow guiding convex body is located in the flow guiding channel and is connected to the stationary blade frame through the stationary blades. The stationary blade frame is docked with the air outlet side of the fan frame through the air inlet side so that the bottom of the flow guiding convex body is docked with the shaft cylinder of the fan frame.

[0018] The flow guiding convex body axially extends from the air inlet side of the stationary blade frame into the flow guiding channel.

[0019] The volume of the flow guiding convex body gradually decreases from the air inlet side to the air outlet side.

[0020] The radius of the bottom surface circle of the flow guiding convex body is r, and the height is h, and the relationship that h is greater than or equal to 2r is satisfied.

[0021] By arranging the flow guiding convex body along the axis of the shaft cylinder of the fan frame and arranging the flow guiding convex body on the air outlet side of the fan frame, through the guidance of the flow guiding convex body, the air outlet of the air outlet side of the fan frame is smooth, achieving the effects of reducing the noise generated by the turbulent flow and improving the aerodynamic efficiency. Description of the Drawings

[0022] Figure 1 It is a schematic diagram of the turbulent flow profile of a conventional fan;

[0023] Figure 2 It is a three-dimensional schematic diagram of the stationary blade structure of the fan of the present invention;

[0024] Figure 3 It is Figure 2 Another three-dimensional schematic diagram of the stationary blade structure of the fan of

[0025] Figure 4 It is Figure 2Cross-sectional view of the stationary blade structure of the fan;

[0026] Figure 5 For Figure 4 Stereo schematic diagram of the flow guiding convex body in the stationary blade structure of the fan;

[0027] Figure 6 Stereo exploded view of the stationary blade structure of another fan of the present invention;

[0028] Figure 7 For Figure 6 Another angle stereo exploded view of the stationary blade structure of another fan;

[0029] Figure 8 For Figure 6 Stereo combined view of the stationary blade structure of another fan;

[0030] Figure 9 For Figure 8 Combined cross-sectional view of the stationary blade structure of another fan;

[0031] Figure 10 Back static pressure - gas flow - pneumatic efficiency curve of the stationary blade structure of the present invention and the structure without a stationary blade.

[0032] Explanation of reference numerals: 1 - fan housing; 10 - body; 11 - fan air inlet side; 12 - fan air outlet side; 13 - air flow channel; 14 - shaft cylinder; 15 - connecting body; 16 - impeller; 2 - stationary blade housing; 21 - air inlet side; 22 - air outlet side; 23 - flow guiding channel; 25 - stationary blade; 3 - flow guiding convex body; 30 - bottom; 301 - plane; 31 - top; 310 - tip; A - axis; r - circle radius; h - height; L1 - back static pressure - gas flow curve of the structure without a stationary blade; L2 - back static pressure - gas flow curve of the present invention; L3 - gas flow - pneumatic efficiency curve of the structure without a stationary blade; L4 - gas flow - pneumatic efficiency curve of the present invention. Detailed implementation manners

[0033] The above objects, structures and functional characteristics of the present invention will be described with reference to the preferred embodiments shown in the accompanying drawings.

[0034] Please refer to Figures 2 to 5As shown, the present invention provides a stator vane structure of a fan, comprising: a fan housing 1, which includes a body 10, a shaft cylinder 14, a plurality of connecting bodies 15 and a flow guiding convex body 3. On both sides of the body 10, there are respectively provided a fan air inlet side 11 and a fan air outlet side 12. An air flow channel 13 is formed inside the body 10, and the air flow channel 13 is located between the fan air inlet side 11 and the fan air outlet side 12. The shaft cylinder 14 is disposed in the air flow channel 13 inside the body 10, and the shaft cylinder 14 is used for pivotally mounting a fan wheel 16. The plurality of connecting bodies 15 connect the body 10 and the shaft cylinder 14. And the flow guiding convex body 3 is arranged along the axis A of the shaft cylinder 14 of the fan housing 1. The flow guiding convex body 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, the top 31 is arranged away from the shaft cylinder 14, and the cross-sectional area of the bottom 30 is larger than the cross-sectional area of the top 31, so that the flow guiding convex body 3 presents a shape with a wide bottom and a narrow top.

[0035] In this embodiment, the bottom 30 of the flow guiding convex body 3 has a circular or geometric plane 301, such as Figure 5 shown, the top 31 has a tip 310. The volume of the flow guiding convex body 3 gradually decreases from the plane 301 to the tip 310 to form a structure similar to a conical shape. And in this embodiment, this shape with a wide bottom and a narrow top can be a bullet shape, so as to obtain a better flow guiding effect. However, it is not limited thereto. Similar other shapes with a wide bottom and a narrow top, such as a conical shape, a hemispherical shape or a pointed cone shape, can also be applied to the present invention. In addition, in this embodiment, the bottom 30 of the flow guiding convex body 3 is directly connected to the shaft cylinder 14, so that the flow guiding convex body 3 is integrally formed on the shaft cylinder 14. At this time, the flow guiding convex body 3 and the shaft cylinder 14 can be regarded as one body. Therefore, the connecting bodies 15 connecting the body 10 and the shaft cylinder 14 are equivalent to connecting the body 10 and the flow guiding convex body 3. Such as Figure 4As shown, these connectors 15 connect the body 10, the shaft cylinder 14, and the flow guiding convex body 3 simultaneously. In other embodiments, these connectors 15 can alternatively connect only the body 10 and the shaft cylinder 14, or connect only the body 10 and the flow guiding convex body 3. Since the flow guiding convex body 3 and the shaft cylinder 14 can be regarded as an integral body, in the present invention, when using the words that these connectors 15 connect the body 10 and the shaft cylinder 14 to describe the connection relationship between each other, it includes the following three connection situations, that is, these connectors 15 connect the body 10, the shaft cylinder 14, and the flow guiding convex body 3 simultaneously, these connectors 15 connect the body 10 and the shaft cylinder 14, and these connectors 15 connect the body 10 and the flow guiding convex body 3. However, it is not limited thereto. Another option is that the bottom 30 of the flow guiding convex body 3 is detachably mounted on the shaft cylinder 14 to snap-fix the flow guiding convex body 3 to the shaft cylinder 14. Another option is that the flow guiding convex body 3 can be adhesively fixed to the shaft cylinder 14, and the adhesive fixing method can be by using fixing glue or ultrasonic bonding, etc. In other words, the present invention does not limit that the flow guiding convex body 3 is integrally formed on the shaft cylinder 14. The flow guiding convex body 3 can be a component independent of the shaft cylinder 14, and it can be connected and fixed to the shaft cylinder 14 by various fixing means.

[0036] It is worth mentioning that, in order to obtain a better flow guiding effect, the outer shape of the flow guiding convex body 3 is preferably not designed to be similar to a flat convex shape, that is, the height of the flow guiding convex body 3 is preferably not less than the diameter of the bottom 30 of the flow guiding convex body 3. Therefore, please refer to Figure 5 As shown, the bottom surface circle radius of the flow guiding convex body 3 is r, and the height is h, and it satisfies the relationship that h is greater than or equal to 2r, that is, h≥2r. In this way, it can effectively ensure that the outer shape of the formed flow guiding convex body 3 is in a warhead shape, a conical shape, or a hemispherical shape, rather than forming a shape similar to a flat convex shape, thereby achieving a better flow guiding effect. It can be understood that since the flow guiding convex body 3 is detachably mounted on the shaft cylinder 14, the present invention has a large design flexibility in space, and the flow guiding convex body 3 with different bottom surface circle radii and heights can be designed to meet the needs of different customers, and then a flow guiding convex body 3 with a suitable size is selected and set on the shaft cylinder 14. In addition, the connector 15 connecting the fan frame 1 and the shaft cylinder 14 can be in addition to being Figure 4 As shown in a long strip shape, it can also be in a shape similar to a stator vane, and thus a better flow guiding effect can also be obtained.

[0037] In addition, it can be understood that the fan wheels 16 and the flow guiding convex body 3 are respectively provided on both sides of the shaft cylinder 14, as shown in Figure 4As shown, to present the front-back relationship where the fan wheel 16 is located upstream of the air flow and the flow guiding convex body 3 is located downstream of the air flow. Furthermore, in this embodiment, the shaft cylinder 14 is approximately located at the middle position between the air inlet side 11 and the air outlet side 12 of the fan, the fan wheel 16 is close to the air inlet side 11 of the fan, the flow guiding convex body 3 is close to the air outlet side 12 of the fan, and both the fan wheel 16 and the flow guiding convex body 3 are covered and protected by the main body 10. However, it is not limited to this. In other embodiments, the shaft cylinder 14 can also be designed to be located close to the air outlet side 12 of the fan to accommodate the spatial configuration of a larger fan wheel 16, and the flow guiding convex body 3 can be designed to protrude from the air outlet side 12 of the fan, so as to make the fan housing 1 have obvious structural direction recognition.

[0038] Please refer to Figures 6 to 9 As shown, the present invention provides another stator blade structure of a fan, including: a fan housing 1 and a stator blade housing 2 docked to the fan housing 1, wherein the fan housing 1 includes a main body 10, a shaft cylinder 14 and a plurality of connecting bodies 15, and the stator blade housing 2 includes a flow guiding convex body 3. The main difference between this stator blade structure of the fan and the above-mentioned stator blade structure of the fan is that the flow guiding convex body 3 is arranged on the stator blade housing 2 instead of the fan housing 1. Therefore, the flow guiding convex body 3 is not directly connected to the shaft cylinder 14, and it only contacts the shaft cylinder 14 correspondingly.

[0039] In this embodiment, similarly, on both sides of the main body 10 of the fan housing 1, there are respectively an air inlet side 11 and an air outlet side 12 of the fan. There is an air flow channel 13 between the air inlet and outlet sides 11 and 12 of the fan. A shaft cylinder 14 extends at a position close to the air outlet side 12 of the air flow channel 13 and is connected to the fan housing 1 through a plurality of connecting bodies 15. A fan wheel 16 is pivotally arranged corresponding to the outside of the shaft cylinder 14.

[0040] The stator blade housing 2 is assembled and arranged on the fan housing 1 to form a series-connected fan. On both sides of the stator blade housing 2, there are respectively an air inlet side 21 and an air outlet side 22. A flow guiding channel 23 is formed inside the stator blade housing 2. The flow guiding channel 23 is located between the air inlet side 21 and the air outlet side 22. A plurality of stator blades 25 are arranged in the flow guiding channel 23. The flow guiding convex body 3 is located in the flow guiding channel 23 and is connected to the stator blade housing 2 through these stator blades 25. The stator blade housing 2 is docked to the air outlet side 12 of the fan housing 1 through the air inlet side 21, so that the bottom 30 of the flow guiding convex body 3 is docked to the shaft cylinder 14 of the fan housing 1.

[0041] In this embodiment, a flow guiding convex body 3 axially extends from the air inlet side 21 of the stationary blade housing 2 towards the flow guiding channel 23, and the volume of the flow guiding convex body 3 gradually decreases from the air inlet side 21 towards the air outlet side 22, so that the flow guiding convex body 3 presents a conical structure with a wide bottom and a narrow top. Similarly, this shape with a wide bottom and a narrow top can be a bullet shape, so as to obtain a better flow guiding effect. However, it is not limited thereto, and other similar shapes with a wide bottom and a narrow top, such as a conical shape or a hemispherical shape, etc., can also be applied to the present invention.

[0042] By arranging the stationary blade housing 2 on the fan air outlet side 12 of the fan housing 1, and the flow guiding convex body 3 and a plurality of stationary blades 25 are arranged in the flow guiding channel 23 of the stationary blade housing 2, when the air from the fan air outlet side 12 enters the air inlet side 21 of the stationary blade housing 2, through the guidance of the flow guiding convex body 3 and each stationary blade 25, the air outlet of the air outlet side 22 of the stationary blade housing 2 is smooth, so as to achieve the effects of reducing the noise generated by turbulent flow and improving the aerodynamic efficiency, as Figure 9 shown.

[0043] Please refer to Figure 10 shown, which is the back static pressure - gas flow - aerodynamic efficiency curve diagram of the stationary blade structure and the non-stationary blade structure of the fan of the present invention. From the comparison of the curves L1, L2, L3, and L4 in the figure, it can be seen that the present invention with the stationary blade structure has better back static pressure and aerodynamic efficiency than the non-stationary blade structure. Therefore, by arranging the stationary blade structure on the fan air outlet side of the fan unit, and the flow guiding convex body and a plurality of stationary blades are arranged in the flow guiding channel of the stationary blade structure, when the air from the fan air outlet side enters the air inlet side of the stationary blade unit, through the guidance of the flow guiding convex body and each stationary blade, the air outlet of the air outlet side of the stationary blade unit is smooth, achieving the effects of reducing turbulent flow noise and improving efficiency.

[0044] The above has described the present invention in detail, and what is described above is only a preferred embodiment of the present invention, and the scope of implementation of the present invention should not be limited thereby. That is, all equivalent changes and modifications made in accordance with the present invention should still fall within the scope of the patent of the present invention.

Claims

1. A stator vane structure of a fan, characterized in that, Comprising a fan housing and a flow guiding convex body, wherein: The fan housing includes: A body having a fan air inlet side and a fan air outlet side respectively provided on both sides thereof, and an air flow passage is formed in the body, and the air flow passage is located between the fan air inlet side and the fan air outlet side; A shaft cylinder disposed in the air flow passage in the body, and the shaft cylinder is used for pivotally mounting a fan wheel; and A plurality of connecting bodies connecting the body and the shaft cylinder; The flow guiding convex body is arranged along the axis of the shaft cylinder of the fan housing, and the flow guiding convex body includes a bottom portion and a top portion connected to the bottom portion. The bottom portion is disposed corresponding to the shaft cylinder, and the cross-sectional area of the bottom portion is larger than the cross-sectional area of the top portion, so that the flow guiding convex body presents a shape with a wide bottom and a narrow top.

2. The stator vane structure of the fan according to claim 1, characterized in that: The shape with a wide bottom and a narrow top is a bullet shape, a conical shape, a hemispherical shape or a pointed cone shape.

3. The stator vane structure of the fan according to claim 1, characterized in that: The bottom portion is connected to the shaft cylinder so that the flow guiding convex body is integrally formed on the shaft cylinder.

4. The stator vane structure of the fan according to claim 1, characterized in that: The bottom portion is detachably mounted on the shaft cylinder so that the flow guiding convex body is fixed on the shaft cylinder.

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

6. The stator vane structure of the fan according to claim 1, characterized in that: The fan wheel and the flow guiding convex body are respectively disposed corresponding to both sides of the shaft cylinder. The fan wheel is close to the fan air inlet side, and the flow guiding convex body is close to the fan air outlet side.

7. The stator vane structure of the fan according to claim 1, characterized in that, Further included is: A stator blade housing disposed on the fan housing. Both sides of the stator blade housing respectively have an air inlet side and an air outlet side. A flow guiding passage is formed in the stator blade housing, and the flow guiding passage is located between the air inlet side and the air outlet side. A plurality of stator blades are provided in the flow guiding passage. The flow guiding convex body is located in the flow guiding passage and is connected to the stator blade housing through the plurality of stator blades. The stator blade housing is docked with the fan air outlet side of the fan housing through the air inlet side so that the bottom portion of the flow guiding convex body docks with the shaft cylinder of the fan housing.

8. The stator vane structure of the fan according to claim 7, characterized in that: The flow guiding convex body axially extends from the air inlet side of the stator blade housing into the flow guiding passage.

9. The stator vane structure of the fan according to claim 7, characterized in that: The volume of the flow guiding convex body gradually decreases from the air inlet side to the air outlet side.

10. The stator vane structure of the fan according to any one of claims 1 to 9, characterized in that: The bottom surface circle radius of the flow guiding convex body is r, and the height is h, and the relationship h is greater than or equal to 2r is satisfied.