CN220769776U - Fan blade structure for cooling fan and cooling fan - Google Patents
Fan blade structure for cooling fan and cooling fan Download PDFInfo
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- CN220769776U CN220769776U CN202322224110.3U CN202322224110U CN220769776U CN 220769776 U CN220769776 U CN 220769776U CN 202322224110 U CN202322224110 U CN 202322224110U CN 220769776 U CN220769776 U CN 220769776U
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- 238000001816 cooling Methods 0.000 title claims abstract description 23
- 230000009467 reduction Effects 0.000 claims description 23
- 241000883990 Flabellum Species 0.000 claims 1
- 230000017525 heat dissipation Effects 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
- 238000010009 beating Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004630 mental health Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model provides a fan blade structure for a cooling fan and the cooling fan. The fan blade structure for the cooling fan comprises: a hub; a plurality of blades arranged at intervals along the circumferential direction of the hub; the wind protection ring is positioned on the periphery of the blades, the root of each blade is connected with the hub, and the top of each blade is connected with the inner wall of the wind protection ring. The fan blade structure for the cooling fan can reduce pneumatic noise generated by high-speed rotation of the fan.
Description
Technical Field
The utility model relates to the technical field of heat dissipation fans, in particular to a fan blade structure for a heat dissipation fan and the heat dissipation fan.
Background
The fan is used as a traditional fluid machine and is widely applied to various fields of national economy such as energy engineering and the like, such as products such as an energy storage alternating current device, a photovoltaic inverter, a charging pile and the like. In order to meet the heat dissipation, a mode of high rotation speed and simultaneous operation of multiple fans is often adopted, so that serious noise pollution is caused, and physical and mental health of people is even affected.
With the continuous optimization of motor noise and mechanical noise, the pneumatic noise of the fan becomes a main noise source of the axial flow fan. According to an aerodynamic generation mechanism, pneumatic noise of a fan is mainly divided into discrete noise and broadband noise, wherein the discrete noise of the fan is generated by beating surrounding gas medium in the high-speed rotation process of a blade to cause pressure pulsation of the surrounding gas; the broadband noise of the fan is mainly vortex noise generated by airflow pressure pulsation caused by turbulent boundary layers of blades and falling thereof.
Since the flow loss of the air flow is a process of energy dissipation, this process is accompanied by the generation of vibration, heat and noise, and the fan aerodynamic noise is closely related to the flow loss during the fan rotation. The flow loss of the fan mainly comprises leaf top leakage loss, secondary flow loss, unsteady loss and the like. The tip leakage loss refers to the loss caused by the gap between the tip and the wind protection ring in the rotation of the fan, and when the tip leakage vortex interacts with the main flow, a complex vortex structure is generated, and the tip leakage vortex, the separation vortex and the secondary vortex are important factors for generating aerodynamic noise. Therefore, it becomes important to reduce fan aerodynamic noise by controlling the generation of tip vortices.
In order to reduce the aerodynamic noise of the fan, it has been proposed to provide a perforated structure or a tail edge saw tooth structure on the surface of the fan, but the related art has the following disadvantages:
1. perforations arranged on the surface of the blade have a certain influence on the air quantity, and secondary turbulence noise can be easily caused when the rotating speed of the fan is high;
2. the blade is provided with the sawtooth structure, so that falling off and separation of trailing edge vortex can be inhibited to a certain extent, but generation of blade top gap vortex cannot be inhibited, and improvement on fan blade top gap vortex noise is not obvious.
Disclosure of Invention
The utility model provides a fan blade structure for a cooling fan and the cooling fan, wherein the fan blade structure for the cooling fan can reduce pneumatic noise generated by high-speed rotation of a fan.
In order to achieve the above object, the present utility model provides a fan blade structure for a heat dissipation fan, comprising: a hub; a plurality of blades arranged at intervals along the circumferential direction of the hub; the wind protection ring is positioned on the periphery of the blades, the root of each blade is connected with the hub, and the top of each blade is connected with the inner wall of the wind protection ring.
Further, the fan blade structure for the cooling fan further comprises a guide ring connected with the air protection ring, and the inner diameter of at least part of the guide ring is gradually increased from the air outlet end to the air inlet end along the central axis of the air protection ring.
Further, the guide ring is provided with an arc-shaped inner wall, and the arc-shaped inner wall protrudes towards the side where the central axis of the wind protection ring is located.
Further, the guide ring comprises a guide main body and a noise reduction piece connected with the guide main body, and the noise reduction piece is positioned at one end of the guide ring far away from the wind protection ring.
Further, the noise reduction piece is of an annular structure which is arranged around the central axis of the guide ring.
Further, the noise reduction piece is of a sawtooth structure arranged along the circumference of the guide ring.
Further, the wind protection ring and the plurality of blades are integrally formed.
According to another aspect of the present utility model, there is provided a heat dissipating fan, including a fan frame and the above-mentioned fan blade structure for a heat dissipating fan rotatably disposed in the fan frame.
Further, the fan frame is provided with an installation cavity, the wind protection ring is positioned in the installation cavity, and a space is reserved between the outer wall of the wind protection ring and the inner wall of the installation cavity.
Further, the outer diameter D of the guide ring of the fan blade structure for the cooling fan 1 Is greater than or equal to the inner diameter D of the fan frame 0 。
By adopting the technical scheme, the top of the blade is connected with the wind protection ring, so that the top of the blade can be completely intersected with the inner wall surface of the wind protection ring, and a gap between the wind protection ring and the top of the blade can be eliminated, thereby greatly inhibiting the generation of leakage vortex at the top of the blade, reducing the vortex noise in the gap area at the top of the blade, further effectively inhibiting the generation of tip vortex, and reducing the pneumatic noise generated by high-speed rotation of a fan.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:
fig. 1 shows a schematic structural view of an embodiment of a radiator fan of the present utility model;
fig. 2 is a schematic diagram showing an exploded structure of the heat radiation fan of fig. 1;
fig. 3 is a schematic structural view showing a blade structure of the heat dissipation fan of fig. 1;
fig. 4 shows a top view of the cooling fan of fig. 1;
FIG. 5 shows a top view of the fan blade structure of FIG. 3;
fig. 6 is a schematic view showing a structure of the heat radiation fan of fig. 1 at another angle;
FIG. 7 is a top view of a blade structure of the cooling fan of FIG. 6;
fig. 8 shows a schematic structural view of another embodiment of the heat dissipating fan of the present utility model;
FIG. 9 is a top view of the fan blade structure of the cooling fan of FIG. 8;
fig. 10 shows a schematic structural view of another embodiment of the heat dissipating fan of the present utility model; and
fig. 11 shows a top view of a blade structure of the heat dissipation fan of fig. 10.
Wherein the above figures include the following reference numerals:
1. a hub; 2. a blade; 3. a wind protection ring; 5. a guide ring; 6. an arc-shaped inner wall; 7. a noise reduction member; 8. a fan frame.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.
It should be noted that, the fan blade structure for a cooling fan in this embodiment is mainly used for an axial flow cooling fan.
As shown in fig. 1 to 7, an embodiment of the present utility model provides a fan blade structure for a heat dissipation fan. The fan blade structure for the cooling fan comprises a hub 1, a plurality of blades 2 and a wind protection ring 3. Wherein a plurality of blades 2 are arranged at intervals along the circumferential direction of the hub 1; the wind-protecting ring 3 is positioned on the periphery of the blades 2, the root of each blade 2 is connected with the hub 1, and the top of each blade 2 is connected with the inner wall of the wind-protecting ring 3.
In the above technical scheme, through connecting the wind guard ring 3 at the top of blade 2, can make the top of blade 2 intersect completely in the internal face of wind guard ring 3, can eliminate the clearance between wind guard ring 3 and the blade 2 top to can to a great extent restrain the blade top and reveal the vortex production, with the regional vortex noise of reduction blade top clearance, and then can effectively restrain the production of apex vortex, like this, can reduce the pneumatic noise that the fan high-speed rotation produced.
Therefore, compared with the prior art, in order to reduce the aerodynamic noise of the fan, the embodiment not only can reduce the generation of leakage vortex at the top of the blade, but also can avoid the generation of secondary turbulence noise when the perforated structure or the tail edge saw-tooth structure is arranged on the blade.
Specifically, in the embodiment of the present utility model, the wind guard ring is in a ring structure, the plurality of blades 2 are radially arranged around the hub 1, and the plurality of blades 2 are located between the wind guard ring 3 and the hub 1, and the root portions of the blades 2 are connected to the outer surface of the hub.
As shown in fig. 3, in the embodiment of the present utility model, the fan blade structure for a cooling fan further includes a guide ring 5 connected to the air protection ring 3, and at least a portion of the guide ring 5 gradually increases in inner diameter from the air outlet end to the air inlet end along the central axis of the air protection ring 3.
Through the arrangement, on one hand, the guide ring 5 can play a role in buffering transition on air flow at the air inlet end, the speed gradient of the air flow is reduced, so that the air flow separation phenomenon on the surface of the blade is restrained, and the pneumatic noise generated by high-speed rotation of the fan is reduced, on the other hand, the guide ring 5 can effectively restrain the backflow, improve the flowing condition of the air inlet and improve the air quantity.
Specifically, in the embodiment of the present utility model, the guide ring 5 is in an annular structure, and the guide ring 5 is located at the air inlet end.
As shown in fig. 6, in the embodiment of the present utility model, the deflector ring 5 has an arc-shaped inner wall 6, and the arc-shaped inner wall 6 protrudes toward the side where the central axis of the grommet 3 is located (the cross-sectional shape of the deflector ring 5 takes an arc shape).
Through the arrangement, the arc-shaped inner wall 6 of the guide ring can play a role in buffering transition on the air flow at the air inlet end, so that the speed gradient of the air flow is reduced, and the pneumatic noise is reduced.
As shown in fig. 6 to 11, in the embodiment of the present utility model, the guide ring 5 includes a guide body and a noise reduction member 7 connected to the guide body, and the noise reduction member 7 is located at an end of the guide ring 5 away from the wind guard ring 3. In this way, aerodynamic noise can be reduced.
In one embodiment of the present utility model, as shown in fig. 6 and 7, the noise reduction member 7 is an annular structure disposed around the central axis of the deflector ring 5.
In another embodiment, the noise reduction member 7 is a plurality of flanges arranged at intervals around the central axis of the guide ring 5, so that the noise reduction function can be also achieved.
In another embodiment, the end of the noise reduction member 7 away from the guide ring 5 has an arc surface, and the arc surface protrudes toward the side facing away from the guide ring 5 to perform the noise reduction function.
In another embodiment, as shown in fig. 8 to 11, the noise reduction member 7 is a saw tooth structure circumferentially arranged along the guide ring 5. Therefore, the large vortex at the air inlet end can be converted into a vortex with smaller scale in advance, separation and stretching of the vortex are inhibited to a certain extent, and vortex noise of the fan is reduced.
Specifically, as shown in fig. 8 and 9, the noise reduction member 7 has an arcuate saw tooth structure; as shown in fig. 10 and 11, the noise reduction member 7 has a triangular saw-tooth structure, and the specific saw-tooth shape of the noise reduction member 7 is not limited to the above-described shape, as long as the flow guiding noise reduction effect of the flow guiding ring 5 can be enhanced.
In the embodiment of the present utility model, as shown in fig. 1, the wind guard 3 and the plurality of blades 2 are integrally formed. The structure is simple and convenient to process.
As shown in fig. 1, an embodiment of the present utility model provides a heat radiation fan. The cooling fan comprises a fan frame 8 and the fan blade structure for the cooling fan, which is rotatably arranged in the fan frame 8.
Specifically, in the embodiment of the utility model, the fan frame 8 is provided with a mounting cavity, the wind protection ring 3 is positioned in the mounting cavity, and a certain gap exists between the outer wall of the wind protection ring 3 and the inner wall of the mounting cavity, so that the rotation of the wind protection ring 3 is not interfered.
Preferably, as shown in fig. 1, in the embodiment of the present utility model, the guide ring 5 of the fan blade structure protrudes from the fan frame 8 along the axial direction of the wind protection ring 3. Therefore, the buffer transition effect can be achieved on the air flow at the air inlet end, so that the air flow enters the fan blade structure after the flow speed of the air flow is reduced, and the pneumatic noise is reduced.
In one embodiment, the mounting cavity on the fan frame includes a straight hole section and a taper hole section that are connected, the straight hole section is used for accommodating the wind protection ring 3, the taper hole section is convenient for mounting the fan blade structure, and the guide ring 5 can be located in the taper hole section, so that the guide ring 5 does not protrude out of the fan frame (i.e. the guide ring 5 is lower than or flush with the fan frame). Wherein the taper hole section is formed by chamfering.
As shown in fig. 4 and 5, in the embodiment of the present utility model, the outer diameter D of the deflector ring 5 1 Is greater than or equal to the inner diameter D of the fan frame 8 0 。
Through above-mentioned setting, from air-out end to air inlet end, the external diameter of water conservancy diversion ring 5 increases gradually until being greater than fan frame internal diameter, can effectively reduce the production of backward flow to reduce the pressure loss that the backward flow caused, thereby improve air inlet end flow property, and then play the effect that improves the amount of wind.
In the embodiment of the utility model, the outer diameter D of the guide ring 1 Is a diversion ring far away from the wind-protecting ringThe outer diameter of one end (i.e. the maximum outer diameter), the inner diameter D of the fan frame 0 Is the inner diameter of the straight hole section.
The above heat dissipation fan has all advantages of the above fan blade structure, and will not be described herein.
From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects: through the top at the blade is connected and is protected the wind circle, can make the top of blade intersect completely in the internal face of protecting the wind circle, can eliminate the clearance between wind circle and the blade top to can to a great extent restrain the blade top and reveal the vortex production, with the regional vortex noise of reduction blade top clearance, and then can effectively restrain the production of apex vortex, like this, can reduce the pneumatic noise that the fan high-speed rotation produced.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (9)
1. The utility model provides a flabellum structure for radiator fan which characterized in that includes:
a hub (1);
a plurality of blades (2) arranged at intervals along the circumferential direction of the hub (1);
the wind protection rings (3) are positioned on the periphery of the blades (2), the root parts of the blades (2) are connected with the hub (1), and the top parts of the blades (2) are connected with the inner wall of the wind protection rings (3);
the fan blade structure for the cooling fan further comprises a guide ring (5) connected with the air protection ring (3), and the inner diameter of at least part of the guide ring (5) is gradually increased from the air outlet end to the air inlet end along the central axis of the air protection ring (3).
2. Fan blade structure for a radiator fan according to claim 1, characterized in that the guide ring (5) has an arc-shaped inner wall (6), the arc-shaped inner wall (6) protruding toward the side of the central axis of the shroud ring (3).
3. The fan blade structure for a radiator fan according to claim 1, wherein the guide ring (5) comprises a guide main body and a noise reduction member (7) connected with the guide main body, and the noise reduction member (7) is located at one end of the guide ring (5) far away from the wind protection ring (3).
4. A fan blade structure for a radiator fan according to claim 3, wherein the noise reduction member (7) is an annular structure provided around the central axis of the deflector ring (5).
5. A fan blade structure for a radiator fan according to claim 3, wherein the noise reduction member (7) has a saw tooth structure provided along the circumferential direction of the guide ring (5).
6. Fan blade structure for a radiator fan according to any one of claims 1 to 5, characterized in that the shroud (3) and the plurality of blades (2) are integrally formed.
7. A radiator fan, characterized by comprising a fan frame (8) and the fan blade structure for the radiator fan according to any one of claims 1 to 6 rotatably provided to the fan frame (8).
8. -the radiator fan according to claim 7, characterized in that the fan frame (8) has a mounting cavity, the air-protection ring (3) being located in the mounting cavity, a space being provided between the outer wall of the air-protection ring (3) and the inner wall of the mounting cavity.
9. A radiator fan according to claim 7, characterized in that the outer diameter D of the deflector ring (5) of the fan blade structure for the radiator fan 1 Is greater than or equal to the inner diameter D of the fan frame (8) 0 。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322224110.3U CN220769776U (en) | 2023-08-16 | 2023-08-16 | Fan blade structure for cooling fan and cooling fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322224110.3U CN220769776U (en) | 2023-08-16 | 2023-08-16 | Fan blade structure for cooling fan and cooling fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220769776U true CN220769776U (en) | 2024-04-12 |
Family
ID=90600895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322224110.3U Active CN220769776U (en) | 2023-08-16 | 2023-08-16 | Fan blade structure for cooling fan and cooling fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220769776U (en) |
-
2023
- 2023-08-16 CN CN202322224110.3U patent/CN220769776U/en active Active
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