CN220015580U - Axial flow cooling fan - Google Patents
Axial flow cooling fan Download PDFInfo
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- CN220015580U CN220015580U CN202321646357.8U CN202321646357U CN220015580U CN 220015580 U CN220015580 U CN 220015580U CN 202321646357 U CN202321646357 U CN 202321646357U CN 220015580 U CN220015580 U CN 220015580U
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- fan
- notch
- pressure maintaining
- ring body
- end part
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- 238000001816 cooling Methods 0.000 title abstract description 6
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 4
- 230000005855 radiation Effects 0.000 claims abstract 3
- 241000883990 Flabellum Species 0.000 claims description 20
- 230000007704 transition Effects 0.000 claims description 4
- 239000000428 dust Substances 0.000 abstract description 6
- 238000009825 accumulation Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 230000001154 acute effect Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses an axial-flow cooling fan, which comprises a central hub and a group of fan blades, wherein the inner side ends of the group of fan blades are fixed with the central hub, the outer side ends of the group of fan blades are fixedly provided with pressure maintaining rings, the central hub is provided with a plurality of mounting holes, each pressure maintaining ring comprises a cylindrical pressure maintaining ring body which extends axially and a reinforcing flanging which is arranged on the windward side of the pressure maintaining ring body, the outer side ends of the fan blades are connected with the inner side surface of the pressure maintaining ring body to form an intersecting contour line, and the windward side of the pressure maintaining ring body is provided with a notch at the intersecting position of the air outlet side of the pressure maintaining ring body and each fan blade, and the contour of the notch is the intersecting contour line. The heat radiation fan can avoid dust accumulation and improve the performance of the fan.
Description
Technical Field
The present disclosure relates to heat dissipation fans, and particularly to an axial flow heat dissipation fan.
Background
The axial flow cooling fan is a commonly used cooling part and is mainly used in a cooling system, and the axial flow fan mainly comprises a central hub and a group of fan blades, the inner side ends of the group of fan blades are fixed with the central hub, the outer side ends of the group of fan blades are fixedly provided with pressure retaining rings, the pressure retaining rings generally strengthen the structural strength and have air guiding effects, compared with the axial flow fan without the pressure retaining ring structure, the noise can be reduced, the air quantity can be improved, the axial flow fan is arranged on a fan protecting cover, the central hub is fixed on a rotor of a motor, and the axial flow fan is driven to rotate through high-speed rotation of the rotor to generate flowing air. The existing pressure maintaining ring comprises an axially extending complete cylindrical pressure maintaining ring body and a reinforcing flange arranged on the windward side of the pressure maintaining ring body, and the problem of the structure is that the area where the current pressure maintaining ring body is connected with the outer side end of the fan blade forms a dead zone of air flow, vortex generated at the area cannot be discharged in time and blocked at the dead zone, so that the working state of the fan is reduced, the performance is affected, and especially when the heat radiating fan is used in a dust raising environment, dust is accumulated in the area due to blocking of the vortex, and the performance of the fan is further reduced.
Disclosure of Invention
The technical problems to be solved by the utility model are as follows: provided is an axial flow radiator fan capable of avoiding dust accumulation and improving the performance of the fan.
In order to solve the technical problems, the technical scheme of the utility model is as follows: the utility model provides an axial-flow radiator fan, includes central hub and a set of flabellum, the inboard end and the central hub of a set of flabellum are fixed, the outside end of a set of flabellum is fixed with the pressurize ring, be provided with a plurality of mounting hole on the central hub, the pressurize ring includes the pressurize ring body of axial extension's tube-shape and sets up the enhancement turn-ups in the windward side of pressurize ring body, the outside end of each flabellum all is connected and forms crossing contour line with the medial surface of pressurize ring body, the air-out side of pressurize ring body all is provided with the notch in the position crossing with every flabellum, the profile of this notch is crossing contour line.
As a preferable scheme, the notch comprises a high end part near the wind outlet side and a low end part near the windward side, the high end part of the notch is connected with the low end part through the intersecting contour line, and the high end part of any notch is connected with the low end part of an adjacent notch through a bevel part.
Preferably, the inclined surface part comprises an inclined straight inclined surface, one end of the straight inclined surface is connected with the high end part of one notch, and the other end of the straight inclined surface is connected with the low end part of the other notch through an arc-shaped connecting surface.
As a preferred solution, the straight inclined surface is connected with the arc transition between the high end part and one end.
As a preferable scheme, an oblique angle area extending towards the windward side is arranged between the windward side of the outer side end of the fan blade and the pressure maintaining ring body.
As a preferable scheme, the number of the fan blades is seven or nine.
After the technical scheme is adopted, the utility model has the following effects: because the outside end of each flabellum all is connected with the medial surface of pressurize ring body and forms crossing contour line, the air-out side of pressurize ring body all is provided with the notch in the position that intersects with every flabellum, the profile of this notch be crossing contour line, consequently, this axial fan has following advantage at least than current fan: 1. because the notch is arranged, the contour of the notch is an intersecting contour line, and the pressure maintaining ring body is directly leveled with the blade pressure surface of the blade at the notch, the air flow is not blocked to form vortex, and no dust accumulation phenomenon exists, so that the air quantity and efficiency are improved; 2. when the fan runs, the resistance of the blades forms torque, and the sources of the resistance of the blades are two types, namely differential pressure resistance and viscous resistance, namely frictional resistance. The torque is reduced and the efficiency is improved under the condition of the same air quantity.
And because the notch comprises a high end part close to the air outlet side and a low end part close to the windward side, the high end part of the notch is connected with the low end part through the intersecting contour line, the high end part of any notch is connected with the low end part of the adjacent notch through the inclined surface part, and because of the existence of the inclined surface part, the resistance is smaller when the air flow passes through the notch and the area between the notches, and meanwhile, the strength of the pressure retaining ring is also sufficient.
And because the inclined surface part comprises an inclined straight inclined surface, one end of the straight inclined surface is connected with the high end part of one notch, the other end of the straight inclined surface is connected with the low end part of the other notch through an arc-shaped connecting surface, and the arc-shaped connecting surface can enable the inclined angle of the straight inclined surface to be gentle, so that the air flow is gentle, and the vibration of the fan is reduced.
And because the oblique angle area extending towards the windward side is arranged between the windward side of the outer side end of the fan blade and the pressure maintaining ring body, the windward side of the fan blade is not simultaneously contacted with the air flow in the rotating process of the fan, and the oblique angle area of the outer side end of the fan blade is firstly contacted with the air flow and then is contacted with other parts of the windward side, so that resonance caused by the fact that the windward side is simultaneously contacted with the air flow is avoided, and vibration and noise are reduced.
Drawings
The utility model will be further described with reference to the drawings and examples.
FIG. 1 is a schematic view of the structure of the windward side of an embodiment of the present utility model;
FIG. 2 is a schematic side view of an embodiment of the present utility model;
FIG. 3 is an enlarged schematic view of FIG. 2 at A;
FIG. 4 is a perspective view of an embodiment of the present utility model;
FIG. 5 is an enlarged schematic view of FIG. 4 at B;
in the accompanying drawings: 1. a central hub; 2. a fan blade; 21. windward side; 22. lee side; 23. a bevel region; 24. a fan blade suction surface; 25. a fan blade pressure surface; 3. a voltage protection ring; 31. reinforcing flanging; 32. a pressure maintaining ring body; 4. a mounting hole; 5. a notch; 51. a high end portion; 52. a lower end portion; 6. a bevel portion; 61. straight inclined plane; 62. an arc-shaped connecting surface.
Detailed Description
The present utility model will be described in further detail with reference to the following examples.
As shown in fig. 1 to 5, an axial-flow heat dissipation fan comprises a central hub 1 and a group of fan blades 2, wherein the number of the fan blades 2 is seven or nine and is uniformly distributed on the circumference. The inner side end of a group of flabellum 2 is fixed with central wheel hub 1, the outer side end of a group of flabellum 2 is fixed with pressurize ring 3, be provided with a plurality of mounting hole 4 on the central wheel hub 1, pressurize ring 3 includes the annular 32 of the cylindric pressurize that extends of axial and sets up the enhancement turn-ups 31 in the windward side of pressurize ring 32, and wherein flabellum 2 generally includes windward limit 21 and leeward limit 22, and simultaneously, the face that flabellum 2 contacted the air current earlier is flabellum suction face 24, and the face opposite to flabellum suction face 24 is flabellum pressure face 25, and the gas is pressed out through flabellum pressure face 25 after being inhaled from flabellum suction face 24 when flabellum 2 rotates.
In this embodiment, the outer ends of the blades 2 are all connected with the inner side surface of the pressure-maintaining ring body 32 to form an intersecting contour line, the air outlet side of the pressure-maintaining ring body 32 is provided with a notch 5 at the intersecting position with each blade 2, wherein the air outlet side of the pressure-maintaining ring body 32 is one side close to the blade pressure surface 25, the air flows in from the windward side of the pressure-maintaining ring body 32 and flows out from the air outlet side, the contour of the notch 5 is the intersecting contour line, thus the surface formed by the notch 5 on the pressure-maintaining ring body 32 is completely matched with the shape of the blade 2, thus the blade 2 rotates, no dead angle area exists between the blade 2 and the pressure-maintaining ring body 32, the phenomenon of vortex can be reduced, dust accumulation in the area can be reduced, and the efficiency of the fan can be improved.
As shown in fig. 3 and 5, the slots 5 include a high end 51 near the wind outlet side and a low end 52 near the wind facing side, the high end 51 of the slot 5 is connected to the low end 52 by the intersecting contour line, and the high end 51 of any slot 5 is engaged with the low end 52 of an adjacent slot 5 by the inclined surface portion 6.
The inclined surface portion 6 includes an inclined straight inclined surface 61, one end of the straight inclined surface 61 is engaged with the high end portion 51 of one of the notches 5, and the other end of the straight inclined surface 61 is connected with the low end portion 52 of the other notch 5 through an arc-shaped connecting surface 62. Since the straight inclined surface 61 is connected to the lower end portion 52 of the other notch 5 by the arc-shaped connecting surface 62, and the arc-shaped connecting surface 62 itself has a radius, the inclination angle of the straight inclined surface 61 is increased, so that the flow direction of the air flow is changed more smoothly, and vibration and noise can be reduced. The arc transition connection between one end of the straight inclined surface 61 and the high end 51 is realized, so that the whole inclined surface part 6 is in smooth transition with the low section part and the high end 51 of the notch 5, and the airflow flowing resistance is smaller and smoother.
An oblique angle area 23 extending towards the windward side is arranged between the windward side 21 at the outer side end of the fan blade 2 and the pressure maintaining ring body 32, wherein as shown in fig. 1 and 4, the oblique angle area 23 has an acute angle extending towards the windward side, so that the oblique angle area 23 rotating at an acute angle of the fan blade 2 can contact the air flow first, thereby the time when the windward side 21 of the fan blade 2 contacts the air flow is staggered, and the problem that vibration and overlarge noise are caused when the windward side 21 contacts the air flow simultaneously is avoided.
Taking a fan with the seven-blade fan blade 2 as an example, the performances of the new fan and the old fan with the diameters of 316mm are compared with each other in the following table;
the structure of the old fan is similar to that of the axial flow fan described in patent application number 202211103200.0, the pressure-maintaining ring body 32 is a complete cylinder, the old fan is consistent with other parameters of the fan in the embodiment, but the pressure-maintaining ring body 32 is different, so that the fan in the embodiment can be seen, and the air volume is increased by 210m under the rated rotation speed and the working static pressure 3 And/h, the static pressure efficiency is improved by 1.2%, and the effect is obvious.
The above examples are merely illustrative of the preferred embodiments of the present utility model, and are not intended to limit the scope of the present utility model, and various modifications and adaptations of the technical solution of the present utility model should and are intended to fall within the scope of the present utility model as defined in the claims.
Claims (6)
1. The utility model provides an axial fan, includes central hub and a set of flabellum, the inboard end and the central hub of a set of flabellum are fixed, the outside end of a set of flabellum is fixed with the pressurize ring, be provided with a plurality of mounting hole on the central hub, its characterized in that: the pressure maintaining ring comprises a cylindrical pressure maintaining ring body extending axially and a reinforcing flanging arranged on the windward side of the pressure maintaining ring body, the outer side ends of the blades are connected with the inner side surface of the pressure maintaining ring body to form an intersecting contour line, the air outlet side of the pressure maintaining ring body is provided with a notch at the intersecting position of each blade, and the contour of the notch is the intersecting contour line.
2. An axial flow heat radiation fan as claimed in claim 1, wherein: the notch comprises a high end part close to the wind outlet side and a low end part close to the windward side, the high end part of the notch is connected with the low end part through the intersecting contour line, and the high end part of any notch is connected with the low end part of an adjacent notch through an inclined surface part.
3. An axial flow heat radiation fan as claimed in claim 2, wherein: the inclined surface part comprises an inclined straight inclined surface, one end of the straight inclined surface is connected with the high end part of one notch, and the other end of the straight inclined surface is connected with the low end part of the other notch through an arc-shaped connecting surface.
4. An axial flow radiator fan as defined in claim 3, wherein: and one end of the straight inclined plane is connected with the arc transition between the high end part of the straight inclined plane.
5. An axial flow radiator fan as defined in claim 4, wherein: an oblique angle area extending towards the windward side is arranged between the windward side of the outer side end of the fan blade and the pressure maintaining ring body.
6. An axial flow radiator fan as defined in claim 5, wherein: the number of the fan blades is seven or nine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321646357.8U CN220015580U (en) | 2023-06-27 | 2023-06-27 | Axial flow cooling fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321646357.8U CN220015580U (en) | 2023-06-27 | 2023-06-27 | Axial flow cooling fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220015580U true CN220015580U (en) | 2023-11-14 |
Family
ID=88684147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321646357.8U Active CN220015580U (en) | 2023-06-27 | 2023-06-27 | Axial flow cooling fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220015580U (en) |
-
2023
- 2023-06-27 CN CN202321646357.8U patent/CN220015580U/en active Active
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