Noise reduction fan blade

Abstract

The utility model belongs to the technical field of fans, and particularly relates to a noise reduction fan blade which comprises a base plate, the base plate is of a cylindrical structure, a plurality of fan blades which are circumferentially distributed at equal intervals are arranged on the outer wall of the circumference of the base plate, and cutting edges are arranged at the tail ends of the fan blades and located on the edges of the front sides in the rotating direction. The front side face of the fan blade is provided with the hemispherical protrusions which are evenly distributed, wind noise generated when vortex enters the rear side of the fan blade is reduced, the cutting edge and the softening edge are arranged, noise generated when the fan blade collides with air when the fan blade rotates is reduced, airflow at the acute angle position of the cutting edge is softened through the softening edge, and the noise generated when the fan blade rotates is reduced. The airflow cut by the cutting edge becomes gentle, and the resistance and noise generated when the airflow is separated by the cutting edge are reduced; by arranging the flow guide assembly, wake flow softened by the fan blades enters the flow guide air channel, and vortex is greatly restrained and separated through guiding and consumption of the flow guide air channel.

Description

Technical Field

[0001] The utility model belongs to the technical field of fans, and in particular relates to a noise-reducing fan blade. Background Art

[0002] With the development of the electronics industry, the development of electronic products is gradually evolving towards high performance, high frequency, high speed and thinness. As the performance of electronic products continues to improve, the computing speed is getting faster and faster, the computing speed of its internal chipset is constantly improving, the number of chips is constantly increasing, and the heat emitted by the chips when working is also increasing accordingly. If this heat is not dissipated in time, it will greatly affect the performance of electronic products and reduce the computing speed of electronic products. As the heat continues to accumulate, it may also burn electronic products. Therefore, electronic products must be cooled.

[0003] Cooling fans play an extremely important role in the heat dissipation of electronic products at this stage. Among them, the fan blades have a great influence on the wind pressure and air volume generated by the fan, and also have a great influence on whether the fan will generate noise or the quantum size of the noise.

[0004] For example, the Chinese patent with publication number CN210265265U discloses a fan blade, belonging to the field of fan technology, including a shaft mounting plate, a mounting hole is arranged at the center of the shaft mounting plate, a plurality of blade mounting plates extending outward are formed on the outer circumference of the shaft mounting plate, a blade extending downward is formed below the blade mounting plate, an annular retaining ring is formed on the outer side of the blade mounting plate, and a vent is formed between adjacent blade mounting plates and the annular retaining ring. The utility model has the advantages of strong air output and simple processing.

[0005] This patent has some shortcomings when in use, such as: the device in this patent fixes multiple blades by setting a rotating shaft mounting plate and a blade mounting plate. Due to the increased deadweight, compared with traditional blades, this fixing method makes multiple blades require higher motor power and consume more energy during rotation; in addition, since the device in this patent uses multiple blades vertically arranged with the blade mounting plate for blowing, the direction of the blades is vertically arranged in the opposite direction of their rotation, so that the wind resistance generated when the blades rotate is greater, which increases energy consumption and generates greater noise at the same time; at the same time, the wind generated by the blades will be divided into two streams, one part blows to the front side and the other part blows to the back side, and the opposite wind direction offsets each other, making the fan blade blowing effect extremely poor. In view of this, we propose a noise-reducing fan blade. Utility Model Content

[0006] The purpose of the utility model is to provide a noise-reducing fan blade to solve the problems raised in the above-mentioned background technology.

[0007] In view of this, the utility model provides a noise reduction fan blade, comprising:

[0008] The chassis is cylindrical in structure, a plurality of blades are arranged on the circumferential outer wall of the chassis and are distributed at equal intervals around the circumference, a cutting edge is arranged at the tail end of the blade and at the front edge in the rotation direction, a softening edge is arranged at the tail end of the blade and close to the cutting edge, and a plurality of evenly distributed hemispherical protrusions are arranged on the front wind guide surface of the blade;

[0009] A plurality of flow guide components are respectively located at the tail ends of the front side surfaces of the plurality of fan blades and are used to guide the vortex-shaped gas generated when the fan blades rotate.

[0010] In the above technical solution, further, the number of the guide components is consistent with the number of fan blades.

[0011] In the above technical solution, further, the flow guide component includes:

[0012] A guide block is fixedly installed at the tail end of the fan blade and close to the rear edge in the direction of rotation. A cover is fixed to the front side of the guide block. An arc groove is provided on the guide block. A through groove is provided on the cover. The arc groove and the through groove constitute a guide air duct.

[0013] In the above technical solution, further, the air inlet side of the arc-shaped groove is tightly attached to the front surface of the fan blade, and the air outlet side of the arc-shaped groove is provided with an arc-shaped surface, and the arc-shaped surface cooperates with the through groove.

[0014] In the present technical solution, by fitting the air inlet side with the front side of the fan blade, the collision between the wind generated during the rotation of the fan blade and the guide block is further reduced, so that the vortex at the tail end of the fan blade can be effectively suppressed.

[0015] In the above technical solution, further, the chassis, the multiple fan blades, and the multiple hemispherical protrusions located on the fan blades are an integrally formed structure.

[0016] In the present technical solution, the structural stability of the device is increased by providing an integrally formed structure.

[0017] In the above technical solution, further, a connecting disk is fixed to the back wall of the chassis, a bearing is installed in the connecting disk, and a sealing gasket is installed at the opening of the connecting disk.

[0018] In the present technical solution, by setting a bearing, the device is easier to connect to the rotating shaft of the driving motor, thereby reducing the friction coefficient between the rotating shaft of the motor and the chassis, so that the chassis drives the multiple fan blades to rotate more smoothly, and the noise generated by the friction between the chassis and the driving motor can be greatly reduced.

[0019] In the above technical solution, further, a groove is formed on the front side wall of the chassis, and a cover is pasted in the groove.

[0020] In the technical solution, the front edge of the sticker cover is in an arc-shaped surface. By providing the sticker cover, it is convenient for manufacturers to print their own brand information on the sticker cover.

[0021] The beneficial effects of the utility model are:

[0022] 1. The noise reduction fan blade is provided with a plurality of evenly distributed hemispherical protrusions on the front side of the blade. The hemispherical protrusions are used to disrupt the vortex on the front side of the blade, disperse and weaken the vortex, thereby reducing the wind noise generated when the vortex enters the rear side of the blade.

[0023] 2. The noise reduction fan blades are provided with cutting edges and softening edges, so that the cutting edges can cut the air more easily, which changes the situation that the traditional blades are wider and thicker at the edge and thus have greater friction and collision with the airflow, and reduces the noise generated by the blades colliding with the air when they rotate. The airflow at the sharp angle of the cutting edge is softened by the softening edge, so that the airflow after being cut by the cutting edge becomes smooth, and the resistance and noise generated when the airflow is separated by the cutting edge are reduced.

[0024] 3. The noise reduction fan blade is provided with a guide component so that the wake flow softened by the blade enters the guide air duct. Through the guidance and consumption of the guide air duct, the vortex is greatly suppressed and separated, the aerodynamic loss of leakage at the tail end of the blade is reduced, and the aerodynamic efficiency of the blade is improved. At the same time, by reducing the impact disturbance between the vortex at the tail end of the blade and the inner wall of the wind shield and the downstream blades, the goal of reducing the large noise when multiple blades are working is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is one of the overall structural diagrams of the utility model;

[0026] Figure 2 This is the second schematic diagram of the overall structure of the utility model;

[0027] Figure 3 It is a cross-sectional schematic diagram of the flow guide assembly in the utility model;

[0028] Figure 4 It is an exploded schematic diagram of the chassis, bearing and cover in the utility model.

[0029] The symbols in the figure are:

[0030] 1. Chassis; 2. Fan blades; 3. Cutting edge; 4. Softening edge; 5. Hemispherical protrusion; 6. Guide block; 7. Cover; 8. Guide air duct; 9. Arc groove; 10. Through groove; 11. Connecting plate; 12. Bearing; 13. Sealing pad; 14. Groove; 15. Cover. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0032] In the description of the present application, it should be noted that the terms used here are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but in appropriate cases, the techniques, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0033] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0034] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0035] It should be noted that, in the present application, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0036] Embodiment 1:

[0037] See also Figure 1 - Figure 4 As shown, this embodiment provides a noise reduction fan blade, including:

[0038] The chassis 1 is a cylindrical structure, and a plurality of fan blades 2 are arranged on the circumferential outer wall of the chassis 1 and are distributed at equal intervals around the circumference. A cutting edge 3 is arranged at the tail end of the fan blade 2 and at the front edge in the rotation direction. A softening edge 4 is arranged at the tail end of the fan blade 2 and close to the cutting edge 3. A plurality of evenly distributed hemispherical protrusions 5 are arranged on the front wind guide surface of the fan blade 2.

[0039] A plurality of flow guide components, each of which is located at the tail end of the front surface of the plurality of blades 2 and is used to guide the vortex-shaped gas generated by the blades 2 when they rotate;

[0040] In this embodiment, the flow guide assembly includes:

[0041] A guide block 6 is fixedly mounted at the tail end of the fan blade 2 and close to the rear edge in the rotation direction. A cover 7 is fixed to the front side of the guide block 6. An arc groove 9 is formed on the guide block 6. A through groove 10 is formed on the cover 7. The arc groove 9 and the through groove 10 form a guide air duct 8.

[0042] The number of the flow guide components is consistent with the number of the fan blades 2.

[0043] Among them, the principle of this device is as follows:

[0044] When the device is in use, the hole of the connecting plate 11 on the back side of the chassis 1 is aligned with the rotating shaft of the driving motor of the fan and inserted so that the rotating shaft of the driving motor is plugged and matched with the bearing 12 in the connecting plate 11. The fan is started, and the rotating shaft of the driving motor drives the chassis 1 to rotate, and the multiple fan blades 2 on the chassis 1 rotate accordingly to form wind;

[0045] In the noise reduction process, when the fan blade 2 cuts the air, an airflow directed to the front and back sides of the fan blade 2 is generated at the cutting position. The airflow on the back side can be stably directed to the rear side of the rotation direction of the fan blade 2 under the guidance of the arc-shaped convex surface of the fan blade 2. In this process, the airflow on the back side is relatively stable, and the wind noise generated is low.

[0046] The airflow generated when the front side of the blade 2 in the conventional fan is cut is easy to generate a disturbing layer with the airflow of the parallel layer under the concave surface of the blade 2, thereby forming a disordered vortex and generating a large noise. However, the device is provided with a plurality of evenly distributed hemispherical protrusions 5 on the front side of the blade 2, and the hemispherical protrusions 5 are used to disrupt the vortex on the front side of the blade 2, disperse and weaken the vortex, thereby reducing the wind noise generated when the vortex enters the rear side of the blade 2;

[0047] Furthermore, the cutting edge 3 at the rear end of the fan blade 2 has a relatively small resistance area when in contact with the air, so that the cutting edge 3 can cut the air more easily, changing the situation that the traditional fan blade 2 is wider and thicker at the edge position and has greater friction and collision with the airflow, reducing the noise generated by the collision between the fan blade 2 and the air when it rotates, and softening the airflow at the sharp angle position of the cutting edge 3 by the softening edge 4, so that the airflow cut by the cutting edge 3 becomes smooth, reducing the resistance and noise generated when the airflow is separated by the cutting edge 3;

[0048] Furthermore, by providing a guide component, the wake flow softened by the fan blade 2 enters the guide air duct 8. Through the guidance and consumption of the guide air duct 8, the vortex is greatly suppressed and separated, reducing the aerodynamic loss of leakage at the tail end of the fan blade 2, thereby improving the aerodynamic efficiency of the fan blade 2. At the same time, by weakening the impact disturbance between the vortex at the tail end of the fan blade 2 and the inner wall of the wind shield and the downstream blades, the goal of reducing the large noise generated by multiple fan blades 2 during operation is achieved.

[0049] Embodiment 2:

[0050] The present embodiment provides a noise reduction fan blade, which, in addition to the technical solutions of the above-mentioned embodiments, also has the following technical features: the air inlet side of the arc groove 9 is tightly attached to the front surface of the blade 2, and the air outlet side of the arc groove 9 is provided with an arc surface, and the arc surface cooperates with the through groove 10.

[0051] Among them, by fitting the air inlet side with the front side of the fan blade 2, the collision between the wind generated by the fan blade 2 during the rotation and the guide block 6 is further reduced, so that the vortex at the tail end of the fan blade 2 can be effectively suppressed.

[0052] Embodiment 3:

[0053] The present embodiment provides a noise reduction fan blade, which, in addition to the technical solutions of the above-mentioned embodiments, also has the following technical features: the chassis 1 and the plurality of blades 2 and the plurality of hemispherical protrusions 5 located on the blades 2 are an integrally formed structure.

[0054] Among them, the structural stability of the device is increased by providing an integrated molding structure.

[0055] Embodiment 4:

[0056] The present embodiment provides a noise reduction fan blade, which, in addition to the technical solutions of the above-mentioned embodiments, also has the following technical features: a connecting plate 11 is fixed to the back wall of the chassis 1, a bearing 12 is installed in the connecting plate 11, and a sealing gasket 13 is installed at the opening of the connecting plate 11.

[0057] Among them, by setting the bearing 12, the device is easier to connect with the shaft of the driving motor, reducing the friction coefficient between the motor shaft and the chassis 1, so that the chassis 1 drives the multiple fan blades 2 to rotate more smoothly, and the noise generated by the friction between the chassis 1 and the driving motor can be greatly reduced.

[0058] Embodiment 5:

[0059] This embodiment provides a noise reduction fan blade, which, in addition to the technical solutions of the above embodiments, also has the following technical features: a groove 14 is opened on the front side wall of the chassis 1, and a cover 15 is pasted in the groove 14.

[0060] The front edge of the sticker cover 15 is in an arc-shaped surface. By providing the sticker cover 15 , it is convenient for manufacturers to print their own brand information on the sticker cover 15 .

[0061] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A noise-reducing fan blade, characterized in that: include: A chassis (1), the chassis (1) being of a cylindrical structure, the circumferential outer wall of the chassis (1) being provided with a plurality of fan blades (2) distributed at equal intervals around the circumference, the fan blade (2) being provided with a cutting edge (3) at the rear end and at the front edge in the direction of rotation, the fan blade (2) being provided with a softening edge (4) at the rear end and close to the cutting edge (3), and a plurality of evenly distributed hemispherical protrusions (5) being provided on the front wind guide surface of the fan blade (2); A plurality of flow guide components are respectively located at the tail ends of the front side surfaces of the plurality of fan blades (2) and are used to guide vortex-shaped gas generated by the fan blades (2) when they rotate.

2. A noise reduction fan blade according to claim 1, characterized in that: The number of the flow guide components is consistent with the number of the fan blades (2).

3. The noise reduction fan blade according to claim 1, characterized in that: The flow guide assembly comprises: A guide block (6), the guide block (6) being fixedly mounted at the tail end of the fan blade (2) and close to the rear edge in the rotation direction, a cover (7) being fixedly mounted on the front side of the guide block (6), an arc-shaped groove (9) being provided on the guide block (6), a through groove (10) being provided on the cover (7), and the arc-shaped groove (9) and the through groove (10) forming a guide air duct (8).

4. The noise reduction fan blade according to claim 3, characterized in that: The air inlet side of the arc-shaped groove (9) is in close contact with the front surface of the fan blade (2), and the air outlet side of the arc-shaped groove (9) is provided with an arc-shaped surface, and the arc-shaped surface matches the through groove (10).

5. The noise reduction fan blade according to claim 1, characterized in that: The chassis (1), the plurality of fan blades (2), and the plurality of hemispherical protrusions (5) located on the fan blades (2) are an integrally formed structure.

6. The noise reduction fan blade according to claim 1, characterized in that: A connecting disk (11) is fixed to the back side wall of the chassis (1), a bearing (12) is installed in the connecting disk (11), and a sealing cushion (13) is installed at the opening of the connecting disk (11).

7. The noise reduction fan blade according to claim 1, characterized in that: A groove (14) is formed on the front side wall of the chassis (1), and a cover (15) is pasted into the groove (14).

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