CN212563786U - Cluster fan blade structure with reinforcing frame and axial flow fan - Google Patents
Cluster fan blade structure with reinforcing frame and axial flow fan Download PDFInfo
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- CN212563786U CN212563786U CN201922496219.6U CN201922496219U CN212563786U CN 212563786 U CN212563786 U CN 212563786U CN 201922496219 U CN201922496219 U CN 201922496219U CN 212563786 U CN212563786 U CN 212563786U
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- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 50
- 230000009467 reduction Effects 0.000 claims abstract description 27
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- 238000007664 blowing Methods 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000013461 design Methods 0.000 description 17
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
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- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
- F04D29/327—Rotors specially for elastic fluids for axial flow pumps for axial flow fans with non identical blades
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Abstract
The utility model discloses a cluster fan blade structure with a reinforcing frame, which comprises a fixed framework and a noise reduction structure, wherein at least one group of cluster fan blades are arranged on the fixed framework, each cluster fan blade comprises a first fan blade and a second fan blade, and the first fan blade and the second fan blade are distributed at intervals; the first fan blade is arranged on the fixed framework, the second fan blade is connected and arranged on the first fan blade through a connecting piece, the connecting piece penetrates through the first fan blade, and the connecting piece is connected end to form a reinforcing frame; the noise reduction structure is arranged on the first fan blade, and/or the second fan blade, and/or the fixed framework, and/or the reinforcing frame, and is arranged into any one of a saw-tooth structure, a wave-shaped structure, a V-shaped structure, a W-shaped structure and a semicircular structure or a combination of any shape and structure. The cluster fan blade structure has the advantages of good air supply stability and large air supply quantity, and also has a certain noise reduction function. The utility model also discloses an axial fan of having above-mentioned cluster fan blade structure.
Description
Technical Field
The utility model relates to a heat dissipation technical field, concretely relates to cluster fan blade structure, axial fan with strengthen frame.
Background
The fan is widely applied to electronic components such as computers, civil electric appliances such as hair dryers and the like, and industries and fields such as chemical engineering, machinery and the like. The main performances of the fan include air supply performance and acoustic performance, wherein the air supply performance is taken as the most basic performance of the fan, and the larger the air supply amount is, the more stable the air supply is, which shows that the fan can achieve the better heat dissipation effect.
In the current fan, a common single-layer smooth blade is mostly adopted, the blade of the fan easily vibrates when rotating around a hub, and the problems of poor air supply stability, small air supply quantity and the like exist. In order to solve these problems, in the conventional design, the number of the blades is usually increased to ensure the stability of the fan blade, but this results in that the length and area of the fan blade are more limited, thereby reducing the amount of air supplied. The existing conventional fan blade design is difficult to realize the problems of high air supply stability and large air supply quantity at the same time, and along with the continuous improvement of the living standard of people, the acoustic performance requirements of people on the fan are also continuously improved, the problems need to be solved, and better acoustic performance needs to be achieved at the same time, so that the existing conventional design can obviously not meet the requirements of people on the high-performance fan.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a cluster fan blade structure with strengthen frame has the good and big advantage of air supply volume of air supply stability, in addition, still has the certain function of making an uproar of falling, and overall design is simple moreover, and the technology degree of difficulty is little, can be favorable to improving production efficiency, reduction in production cost.
In order to solve the above problem, the utility model discloses realize according to following technical scheme:
the utility model provides a pair of cluster fan blade structure with strengthen frame, include:
the fan comprises a fixed framework, wherein at least one group of cluster fan blades are arranged on the fixed framework, each cluster fan blade comprises a first fan blade and a second fan blade, and the first fan blades and the second fan blades are distributed at intervals; the first fan blade is arranged on the fixed framework, the second fan blade is connected and arranged on the first fan blade through a connecting piece, the connecting piece penetrates through the first fan blade, and the connecting piece is connected end to form a reinforcing frame;
the noise reduction structure is arranged on the first fan blade, the second fan blade, the fixed framework and/or the reinforcing frame, and is in a sawtooth structure, a wave structure, a V-shaped structure, a W-shaped structure or a semicircular structure or a combination of structures in any shape.
Further, the reinforcing frame and the fixed framework are arranged concentrically, and the diameter of the reinforcing frame is larger than that of the fixed framework.
Further, the distance between the outermost end of the outer edge of the first fan blade and the reinforcing frame is greater than or equal to the distance between the outermost end of the outer edge of the second fan blade and the reinforcing frame.
Furthermore, a groove is formed in one side face of the fixing framework, and a plurality of reinforcing ribs are uniformly arranged in the groove.
Further, the inner installation angle of the first fan blade is set to be 15-75 degrees, the outer installation angle is set to be 10-70 degrees, and/or the inner installation angle of the second fan blade is set to be 15-75 degrees, and the outer installation angle is set to be 10-70 degrees.
Further, the clearance between the first fan blade and the second fan blade in height is not less than 10 mm.
Further, the noise reducing structure includes any two different shape structures.
Further, the cluster fan blade has a plurality of fan blade real-time values, and each of the fan blades in the cluster fan blade may not be overlapped or may be overlapped within a specified angle right in front of the blowing direction of the cluster fan blade, wherein the fan blade real-time value calculation formula is as follows:
(i and n are positive integers, i is more than or equal to 1, and n is more than i), wherein S isDThe blade real number value L of the clustered blades under the diameter DiIs the chord length of the blade i,
is the sum of the chord lengths of the blades of each blade at the same diameter D, and n is the number of blades present at the same diameter D.
Furthermore, the cluster fan blade is provided with a plurality of diameters D, the diameter D ranges from 20mm to 1.5m, and the fan blade solidity value ranges from 0.05 to 0.95.
The utility model also provides an axial fan, a serial communication port, including foretell cluster fan blade structure that has the enhancement frame.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses a cluster fan blade structure with strengthen frame sets up through the interval distribution of first fan blade and second fan blade for the fan blade can keep higher stability at the rotation in-process, guarantees the stability of air supply. And all the first fan blades arranged on the fixed framework through the reinforcing frame are connected together, so that the stability of the first fan blades can be effectively improved, and the vibration generated when the first fan blades rotate is reduced, thereby ensuring smooth airflow flow and improving the air supply stability. Moreover, through the structure of the cluster fan blades, a plurality of fan blade degrees can be obtained, so that the cluster fan blades can be limited to the outermost periphery of a single fan blade to do effective work, and the wind blown out by the cluster fan blades is more uniform and has higher efficiency compared with the traditional single smooth fan blade. Through the design of strengthening frame and second fan blade, can combine with first fan blade well, can solve the problem of air supply volume and stability simultaneously effectively, when realizing that the air supply volume is big, can also guarantee the stability of fan blade. And such fan blade structural design is simple, and the technology degree of difficulty is little, can be favorable to improving production efficiency, reduction in production cost.
In addition, this cluster fan blade structure still is provided with the structure of making an uproar of falling, through the structure of making an uproar of falling of specific shape structure, can effectively realize cutting and combing the air current, reduces the emergence of big vortex and turbulent phenomenon to can reduce the production of noise effectively.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without any creative effort.
Wherein:
fig. 1 is a schematic structural diagram of a cluster blade structure with a reinforcing frame according to the present invention;
fig. 2 is a schematic view of the noise reduction structure of the present invention;
fig. 3 is a schematic back structure diagram of the cluster blade structure with the reinforcing frame of the present invention;
FIG. 4 is a screenshot of A-A in FIG. 3;
fig. 5 is a schematic structural view of a single fan blade of the present invention;
fig. 6 is a schematic view of the shape of the noise reduction structure and the secondary noise reduction structure of the present invention;
fig. 7 is a schematic structural view of the junction of the present invention;
in the figure:
1-a fixed architecture; 11-reinforcing ribs; 2-a first fan blade; 3-a second fan blade; 4-a reinforcing frame; 5-noise reduction structure; 51-order noise reduction structure; 6-junction; 7-junction; b1 — trailing edge; b2-outer edge; b3 — leading edge; b4-inner edge; c-junction point; h-geometric center.
Detailed Description
In order that the above objects, features and advantages of the present application can be more clearly understood, a detailed description of the present application will be given below with reference to the accompanying drawings and detailed description. In addition, the embodiments and features of the embodiments of the present application may be combined with each other without conflict. In the following description, numerous specific details are set forth to provide a thorough understanding of the present application, and the described embodiments are merely a subset of the embodiments of the present application, rather than all embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
As shown in fig. 1, the utility model provides a cluster fan blade structure with strengthen frame, including fixed framework 1, be provided with at least a set of cluster fan blade on the fixed framework 1, the cluster fan blade includes first fan blade 2 and second fan blade 3, and first fan blade 2 sets up on fixed framework 1, and second fan blade 3 passes through the connecting piece and connects the setting on first fan blade 2, and the connecting piece runs through first fan blade 2, and the connecting piece end to end forms and strengthens frame 4. Through the design of strengthening frame 4 to link together through strengthening frame 4 all first fan blades 2 that will set up on fixed framework 1, can increase first fan blade 2's stability effectively, reduce the vibrations that produce when first fan blade 2 rotates, thereby guarantee that the air current flows smoothly, improve air supply stability. The reinforcing frame 4 and the fixed framework 1 are concentrically arranged, the diameter of the reinforcing frame 4 is larger than that of the fixed framework 1, the maximum rotation coordination of the reinforcing frame 4 and the fixed structure can be guaranteed when the fan rotates, and the influence on the rotating stability of the fan blade structure due to vibration caused by uneven air flow generated between the reinforcing frame 4 and the fixed structure is avoided.
The first fan blade 2 and the second fan blade 3 are arranged at intervals, so that the first fan blade 2 and the second fan blade 3 can achieve high coordination when rotating, the stability of the fan blades during rotation is guaranteed, the stability of air supply is guaranteed, and the air supply quantity can be further improved. The second fan blade 3 is arranged on the reinforcing frame 4, so that the material consumption of the second fan blade 3 can be reduced, the structural design is simple, the process difficulty is low, the improvement of the production efficiency can be facilitated, and the production cost is reduced. Because the blade root of the second fan blade 3 is not directly connected with the fixed framework 1, the capability of resisting airflow impact is slightly weaker than that of the first fan blade 2, and therefore, the distance between the outermost end of the outer edge of the first fan blade 2 and the reinforcing frame 4 is set to be larger than or equal to the distance between the outermost end of the outer edge of the second fan blade 3 and the reinforcing frame 4. Due to the design, the first fan blade 2 can resist the impact of more air flows relative to the second fan blade 3, the impact of the air flows on the second fan blade 3 is reduced, the stability of the second fan blade 3 is ensured, and the overall stability of the fan blade structure is improved.
A groove is formed in one side face of the fixed framework 1, a plurality of reinforcing ribs 11 are evenly arranged in the groove, and the reinforcing ribs 11 can further increase the stability of the clustering fan blade structure. The structure of the fixed framework 1 is set to be cylindrical or round table-shaped, the structure of the reinforcing frame 4 is set to be hollow cylindrical or hollow round table-shaped, the design of the cylindrical or round table is adopted, the impact of airflow on the surfaces of the fixed framework 1 and the reinforcing frame 4 can be reduced, the smooth flowing of the airflow is facilitated, and the stability of the air supply is improved. Meanwhile, due to the design, when the airflow flows through the fixed framework 1 and the reinforcing frame 4, the generation of turbulent flow or large eddy of the airflow is avoided, and the generation of noise is avoided, so that the noise is further reduced. Moreover, the fixing framework 1 and the reinforcing frame 4 are arranged to be in a circular truncated cone shape, namely the surfaces of the fixing framework 1 and the reinforcing frame 4 are arranged in an inclined mode, the inclined angle is arranged according to the flowing direction of the air flow, the smoothness of the air flow can be further guaranteed, the stability of air supply is improved, and the noise can be further reduced.
In the design of the fan blade, the angle of a straight line formed by connecting two end points of the intersecting line of the fan blade and the fixed framework 1 relative to the central axis of the fixed framework 1 is called an inner mounting angle, the angle of a straight line formed by connecting two end points of the interface with the largest width of the fan blade relative to the central axis of the fixed framework 1 is called an outer mounting angle, and in the design of the cluster fan blade structure, the design range of the mounting angles of the first fan blade 2 and the second fan blade 3 is as follows: the inner mounting angle is 15-75 degrees, and the outer mounting angle is 10-70 degrees. By the design and matching of the first fan blade 2 and the second fan blade 3 at the same or different angles, parameters such as diffusion, distance, noise and the like of the first fan blade 2 and the second fan blade 3 can be optimized, and therefore the performance of the fan is optimized.
In this cluster fan blade design, cluster fan blade structure has a plurality of fan blade real estate, and each blade in the cluster fan blade structure can not overlap in the appointed angle of the dead ahead of cluster fan blade structure blowing direction, and wherein, the fan blade real estate formula of calculation is:
(i and n are positive integers, i is more than or equal to 1, and n is more than i), wherein S isDIs the blade real value L of the cluster blade structure under the diameter DiIs the chord length of the blade i,
is the sum of the chord lengths of the blades of each blade at the same diameter D, and n is the number of blades present at the same diameter D. In some specific embodiments, the diameter D may range from 20mm to 1.5m, and the fan blade solidity value may range from 0.05 to 0.95.
In this embodiment, the cluster blade structure has a plurality of blade solidity values, which means that each blade with different diameters can perform effective work on the outermost periphery of the diameter, but is not limited to the outermost periphery of a single blade with one diameter, so that the wind blown out by the cluster blade structure is more uniform and has higher efficiency than the conventional blades.
As shown in fig. 2-4, the clustering fan blade structure is further provided with a noise reduction structure, the noise reduction structure 5 is arranged at an edge of a connection end of the first fan blade 2 and the fixed structure 1, an edge of a connection end of the first fan blade 2 and the reinforcing frame 4, and an edge of a connection end of the second fan blade 3 and the reinforcing frame 4, and the connection positions are connection positions 7 shown in fig. 3. According to research, the above-mentioned junction 7 is the most unstable region of the flow field during the operation of the fan blade, because the airflow has significant interaction with the geometric surface or edge of the fan blade, and forms an unstable boundary layer, especially at the junction 7 farther from the air inlet surface or in the region with unsmooth transition. The unstable boundary layer strengthens the development of small-scale turbulence, and the energy of the flow field is dissipated and converted into noise energy through a small-scale turbulence mechanism.
In addition, during the operation of the fan blade, the airflow field at each junction 6 on the fan blade is also an extremely unstable region, as shown in fig. 5, the transition section of each adjacent edge on the fan blade is the junction 6, and these edges include a leading edge B3, a trailing edge B1, an outer edge B2, and an inner edge B4. Therefore, each junction 6 of the first fan blade 2 and the second fan blade 3 can also be provided with a noise reduction structure 5, so that the noise can be further reduced. In this embodiment, all junctions 7 and juncture 6 of this cluster fan blade structure can all be provided with and fall the structure 5 of making an uproar, moreover, also can be provided with on the upper and lower edge of fixed framework 1 and reinforcing frame 4 and fall the structure 5 of making an uproar, can also realize combing the air current of flowing through fixed structure and reinforcing frame 4 upper and lower edge to further realize effectively falling the effect of making an uproar.
As shown in fig. 6, the noise reduction structure 5 is configured as a zigzag structure and/or a wave-shaped structure, and may also be a V-shaped, W-shaped, semicircular, multi-circular structure similar to the zigzag and wave-shaped structure. The shape structure can cut and comb large eddy generated when air flows out of the connecting part 7 to form small eddy, so that the smooth air flow transition of the connecting part 7 is ensured, the energy of a flow field is reduced and dissipated to be converted into noise energy, and the noise caused by high-speed rotation of the fan blades is reduced. And can also be provided with the structure 51 of making an uproar on making an uproar structure 5, make an uproar structure 51 of making an uproar is made an uproar to inferior, make an uproar structure 51 sets up on the edge of making an uproar structure 5 of making an uproar, can further cut and comb the air current vortex, further noise reduction.
In this embodiment, the noise reduction structure is formed by combining any two different shape structures, for example, at the junction between the front edge B3 of the fan blade and the outer edge B2, a sawtooth-shaped noise reduction structure is adopted at the side close to the front edge B3, and a wavy noise reduction structure is adopted at the side close to the outer edge B2, and the two different shape structures can supplement each other, so that the phenomenon that the airflow generated after cutting and combing by a single-shape structure is gathered again to form a new vortex is avoided, the formation of the vortex can be further reduced, and the effect of further reducing noise is realized.
As shown in fig. 7, in particular, a boundary point C is disposed on the boundary 6, the boundary point C is used as a dividing point of the boundary 6, and two different noise reduction structures 5 are disposed on the two boundary points; as a preferred arrangement, the intersection point C is the point on the intersection 6 furthest away from the geometric centre H of the blade body. In order to achieve a better noise reduction effect, different noise reduction structures 5 are arranged on two sides of the intersection point C, and the design of the noise reduction structures 5 is based on the intersection point starting layout. Assuming that B1 is the trailing edge of the first fan blade 2, B2 is the outer edge of the first fan blade 2, and point C is the intersection point, the structural form of the noise reduction structure 5 disposed on the edge CO1 on one side of the intersection point C may be a wave-shaped structure, and the structural form of the noise reduction structure 5 disposed on the edge CO2 on the other side of the intersection point C may be a zigzag structure.
Correspondingly, the embodiment of the utility model provides a still provide an axial fan, cluster fan blade including any one of the above-mentioned embodiments.
In this embodiment, thanks to the improvement of the above-mentioned cluster fan blade, this axial fan has the advantage that the air output is big and the noise is low.
While the preferred embodiments of the present invention have been described in detail, it should be understood that modifications and variations can be made by persons skilled in the art without inventive faculty, and in light of the above teachings. Therefore, the technical solutions according to the present invention, which can be obtained by logical analysis, reasoning or limited experiments based on the prior art, should be within the scope of protection defined by the claims.
Claims (10)
1. The utility model provides a cluster fan blade structure with strengthen frame which characterized in that includes:
the fan comprises a fixed framework, wherein at least one group of cluster fan blades are arranged on the fixed framework, each cluster fan blade comprises a first fan blade and a second fan blade, and the first fan blades and the second fan blades are distributed at intervals; the first fan blade is arranged on the fixed framework, the second fan blade is connected and arranged on the first fan blade through a connecting piece, the connecting piece penetrates through the first fan blade, and the connecting piece is connected end to form a reinforcing frame;
the noise reduction structure is arranged on the first fan blade, the second fan blade, the fixed framework and/or the reinforcing frame, and is in a sawtooth structure, a wave structure, a V-shaped structure, a W-shaped structure or a semicircular structure or a combination of structures in any shape.
2. The fan blade clustering structure with the reinforcing frame according to claim 1, wherein the reinforcing frame is concentrically arranged with the fixed framework, and the diameter of the reinforcing frame is larger than that of the fixed framework.
3. The fan blade clustering structure with the reinforcing frame according to claim 1, wherein a distance between a farthest end of an outer edge of the first fan blade and the reinforcing frame is greater than or equal to a distance between a farthest end of an outer edge of the second fan blade and the reinforcing frame.
4. The clustering fan blade structure with the reinforcing frame according to claim 1, wherein a groove is provided on one side surface of the fixing frame, and a plurality of reinforcing ribs are uniformly provided in the groove.
5. The clustering fan blade structure with the reinforcing frame according to claim 1, wherein the inner installation angle of the first fan blade is set to be 15 ° -75 °, the outer installation angle is set to be 10 ° -70 °, and/or the inner installation angle of the second fan blade is set to be 15 ° -75 °, and the outer installation angle is set to be 10 ° -70 °.
6. The fan blade clustering structure with the reinforcing frame according to claim 1, wherein a gap between the first fan blade and the second fan blade in height is not less than 10 mm.
7. The clustering fan blade structure with the reinforcing frame according to claim 1, wherein the noise reduction structure comprises any two different shape structures.
8. The fan blade clustering structure with the reinforcing frame according to claim 1, wherein the fan blade clustering structure has a plurality of fan blade real-estate values, and each of the fan blades in the fan blade clustering structure can not be overlapped or overlapped within a specified angle right in front of the blowing direction of the fan blade clustering structure, wherein the fan blade real-estate value calculation formula is as follows:
(i and n are positive integers, i is more than or equal to 1, and n is more than i), wherein S isDThe blade real number value L of the clustered blades under the diameter DiIs the chord length of the blade i,
is the sum of the chord lengths of the blades of each blade at the same diameter D, and n is the number of blades present at the same diameter D.
9. The fan blade clustering structure with the reinforcing frame according to claim 8, wherein the fan blade clustering structure is provided with a plurality of diameters D, the diameter D ranges from 20mm to 1.5m, and the fan blade solidity value ranges from 0.05 to 0.95.
10. An axial flow fan, characterized in that, comprises the blade clustering structure with the reinforcing frame of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922496219.6U CN212563786U (en) | 2019-12-31 | 2019-12-31 | Cluster fan blade structure with reinforcing frame and axial flow fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922496219.6U CN212563786U (en) | 2019-12-31 | 2019-12-31 | Cluster fan blade structure with reinforcing frame and axial flow fan |
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| Publication Number | Publication Date |
|---|---|
| CN212563786U true CN212563786U (en) | 2021-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922496219.6U Expired - Fee Related CN212563786U (en) | 2019-12-31 | 2019-12-31 | Cluster fan blade structure with reinforcing frame and axial flow fan |
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| Country | Link |
|---|---|
| CN (1) | CN212563786U (en) |
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2019
- 2019-12-31 CN CN201922496219.6U patent/CN212563786U/en not_active Expired - Fee Related
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Granted publication date: 20210219 |