CN217029407U - Two-section noise reduction blade of axial flow fan - Google Patents
Two-section noise reduction blade of axial flow fan Download PDFInfo
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- CN217029407U CN217029407U CN202122398356.3U CN202122398356U CN217029407U CN 217029407 U CN217029407 U CN 217029407U CN 202122398356 U CN202122398356 U CN 202122398356U CN 217029407 U CN217029407 U CN 217029407U
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Abstract
The utility model discloses a two-section noise reduction blade of an axial flow fan, which comprises a fan blade, wherein the fan blade is arranged on a hub along the circumferential direction, the fan blade comprises a blade front edge, a blade tail edge, a blade suction surface and a blade pressure surface, the blade suction surface comprises a blade root suction surface and a blade top suction surface, the blade pressure surface comprises a blade root pressure surface and a blade top pressure surface, and the blade front edge and the blade tail edge are distributed on two sides of the blade suction surface and the blade pressure surface; because the suction surface and the pressure surface of the fan blade are both provided with two curved surfaces with curvature, and the transition part of the top curved surface and the root curved surface of the fan blade also forms abrupt change of curvature, when the fan rotates, the high-pressure airflow on the surface of the blade can be effectively prevented from moving to a low-pressure area along the radial direction due to the large curvature change of the radial curved surface of the whole blade, thereby effectively reducing the disturbance and the vortex formed in the radial movement of the airflow and reducing the noise of the fan.
Description
Technical Field
The utility model belongs to the technical field of noise reduction of axial flow fans, and particularly relates to a two-section noise reduction blade of an axial flow fan.
Background
The axial flow fan blade basically consists of four parts: the blade comprises a blade front edge, a blade tail edge, a blade suction surface and a blade pressure surface, wherein the blade suction surface main body is basically formed by the same convex curved surface or similar convex curved surface, and the pressure surface main body is formed by the same concave curved surface or similar concave curved surface. Therefore, the curvature change of the suction surface or the pressure surface of the blade along the radius direction transition curved surface of the impeller is small. For an axial flow fan, when an impeller rotates, airflow pulsation on the surface of a blade is strong, particularly on a suction surface, when the impeller rotates, high pressure on the suction surface quickly moves to a low-pressure area along a radial direction, and the flow generates large disturbance on the suction surface. Similarly, the pressure surface has a certain degree of high-pressure airflow pulsation along the radial direction, which causes vortexes, thereby reducing the efficiency of the fan and increasing the noise of the fan.
When an impeller of an existing axial flow fan rotates, the impeller of the existing axial flow fan has serious radial airflow pulsation, and is difficult to solve, and finally, the fan has high noise and low efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a two-section noise reduction blade of an axial flow fan, which aims to solve the problems of high fan noise and low efficiency when an impeller of the axial flow fan provided by the background technology rotates.
In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a two segmentation blades of making an uproar that fall of axial fan, includes fan blade, fan blade installs on wheel hub along circumference, fan blade includes blade leading edge, blade trailing edge, blade suction surface and blade pressure surface, the blade suction surface includes blade root suction surface and blade top suction surface, the blade pressure surface includes blade root pressure surface and blade top pressure surface, blade leading edge, blade trailing edge distribute in the both sides side of blade suction surface and blade pressure surface.
Preferably, one side of the front edge of the blade is in smooth transition connection with one side of the suction surface of the blade, and the other side of the front edge of the blade is in smooth transition connection with one side of the pressure surface of the blade.
Preferably, one side edge of the blade tail edge is in smooth transition connection with the other side edge of the blade suction surface, and the other side edge of the blade tail edge is in smooth transition connection with the other side edge of the blade pressure surface.
Preferably, the blade root suction surface and the blade tip suction surface on the blade suction surface are arranged radially.
Preferably, the blade root pressure surface and the blade tip pressure surface on the blade pressure surface are arranged in a radial direction.
Preferably, the blade root suction surface and the blade top suction surface are in smooth transition connection, and the blade root pressure surface and the blade top pressure surface are in smooth transition connection.
Preferably, the suction surface and the pressure surface of the blade on the fan blade can be designed into 2 or more curved surfaces and arc surfaces which are radially arranged.
Compared with the prior art, the utility model has the beneficial effects that:
1. the fan blade comprises a blade suction surface and a blade pressure surface, wherein the blade suction surface is radially connected by 2 sections of curved surfaces or more, and a larger curvature mutation is formed at the connection position. The pressure surface of the blade is radially connected by 2 sections and more than 2 sections of curved surfaces, and a large curvature mutation is formed at the connection position. The suction surface and the pressure surface of the blade are radially arranged by 2 sections and more than 2 sections of curved surfaces, so that when the fan blade rotates, the curvature of the radial curved surface of the whole blade is increased, and high-pressure airflow on the surface of the blade can be effectively prevented from moving to a low-pressure area along the radial direction, thereby reducing disturbance and vortex formed in the radial movement of the airflow and reducing the noise of the fan.
2. The suction surface and the pressure surface of the blade of the fan can be designed into 2 or more curved surfaces and arc surfaces and are formed in a radial arrangement mode, the geometric surfaces with different curvatures are distributed on the surface of the blade, the vortex on the surface of the blade can be effectively dispersed, and similar to the multi-end arrangement of feathers on wings of certain birds, the vortex aggregation can be inhibited, the formation of larger vortex noise on the surfaces of the wings can be prevented, and the purpose of effectively reducing the noise is achieved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic front view of a fan blade according to the present invention;
FIG. 3 is a rear view schematic of a fan blade according to the present invention;
fig. 4 is a schematic perspective view of a fan blade according to the present invention.
In the figure: 1. the wind turbine comprises a fan blade, 2 parts of a hub, 3 parts of a blade leading edge, 4 parts of a blade trailing edge, 5 parts of a blade root suction surface, 6 parts of a blade top suction surface, 7 parts of a blade root pressure surface and 8 parts of a blade top pressure surface.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 4, the present invention provides a technical solution: a two-section noise reduction blade of an axial flow fan comprises a fan blade 1, wherein the fan blade 1 is circumferentially arranged on a hub 2, the fan blade 1 comprises a blade front edge 3, a blade tail edge 4, a blade suction surface and a blade pressure surface, the blade suction surface comprises a blade root suction surface 5 and a blade top suction surface 6, and the radial joint of two sections of curved surfaces on the blade suction surface forms a larger curvature mutation; the blade pressure surface comprises a blade root pressure surface 7 and a blade top pressure surface 8, the blade root pressure surface 7 and the blade top pressure surface 8 on the blade pressure surface are arranged along the radial direction, and the radial joint of the two sections of curved surfaces on the blade pressure surface forms larger curvature mutation; the blade front edge 3 and the blade tail edge 4 are distributed on two sides of a blade suction surface and a blade pressure surface, and the blade suction surface and the blade pressure surface are formed by radially arranging two sections of curved surfaces; when the fan blade 1 rotates, because the curvature change of the radial curved surface of the whole blade is large, the high-pressure airflow on the surface of the blade can be effectively prevented from moving to a low-pressure area along the radial direction, so that the disturbance and the vortex formed in the radial movement of the airflow are effectively reduced, and the noise of the fan is reduced.
In this embodiment, one side of the blade front edge 3 is in smooth transition connection with one side of the suction surface of the blade, and the other side of the blade front edge 3 is in smooth transition connection with one side of the pressure surface of the blade. One side edge of the blade tail edge 4 is in smooth transition connection with the other side edge of the blade suction surface, the other side edge of the blade tail edge 4 is in smooth transition connection with the other side edge of the blade pressure surface, and the two sections of curved surfaces of the blade suction surface and the blade pressure surface are arranged along the radial direction.
In the embodiment, the blade root suction surface 5 and the blade top suction surface 6 on the blade suction surface are arranged along the radial direction, and the radial joint of the two sections of curved surfaces on the blade suction surface forms a larger curvature mutation. The blade root pressure surface 7 and the blade top pressure surface 8 on the blade pressure surface are arranged along the radial direction, and the radial joint of the two sections of curved surfaces on the blade pressure surface forms larger curvature mutation. The blade root suction surface 5 and the blade top suction surface 6 are in smooth transition connection, and the blade root pressure surface 7 and the blade top pressure surface 8 are in smooth transition connection. The suction surface and the pressure surface of the blade are respectively formed by two sections of curved surfaces which are arranged along the radial direction, when the fan blade 1 rotates, high-pressure airflow on the surface of the blade can be effectively prevented from moving to a low-pressure area along the radial direction due to the large curvature change of the radial curved surface of the whole blade, so that disturbance and vortex formed in the radial movement of the airflow are effectively reduced, and the noise of the fan is reduced.
In this embodiment, the suction surface and the pressure surface of the fan blade 1 can be designed to be radially arranged with 2 or more curved surfaces and arc surfaces, so that the geometric surfaces with different curvatures are distributed on the surface of the blade, and the vortex on the surface of the blade can be effectively dispersed, similar to the multi-end arrangement of feathers on wings of some birds, the vortex aggregation can be inhibited, and the formation of larger vortex noise on the surfaces of the wings can be prevented, thereby achieving the purpose of effectively reducing noise.
The working principle and the using process of the utility model are as follows:
when the blade of the axial flow fan runs, the radial joint of the blade root suction surface 5 and the blade top suction surface 6 on the blade suction surface forms a larger curvature mutation, the radial joint of the blade root pressure surface 7 and the blade top pressure surface 8 on the blade pressure surface forms a larger curvature mutation, and the blade suction surface and the blade pressure surface are respectively formed by two sections of curved surfaces which are arranged in the radial direction. When the fan blade 1 rotates, because the radial curvature change of the surface of the whole blade is large, the high-pressure airflow on the surface of the blade can be effectively prevented from moving to a low-pressure area along the radial direction, so that the disturbance and the vortex formed in the radial movement of the airflow are effectively reduced, and the noise of the fan is reduced;
the suction surface and the pressure surface of the blade on the fan blade 1 can be designed into 2 or more curved surfaces and arc surfaces which are radially arranged, so that the geometric surfaces with different curvatures are distributed on the surface of the blade, the vortex on the surface of the blade can be effectively dispersed, and similar to the multi-end arrangement of feathers on the wings of certain birds, the vortex aggregation can be inhibited, the formation of larger vortex noise on the surfaces of the wings is prevented, and the purpose of effectively reducing noise is achieved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a two segmentation blades of making an uproar that fall of axial fan, includes fan blade (1), fan blade (1) is installed on wheel hub (2) along circumference, its characterized in that: fan blade (1) includes blade leading edge (3), blade trailing edge (4), blade suction surface and blade pressure surface, the blade suction surface includes blade root suction surface (5) and blade top suction surface (6), the blade pressure surface includes blade root pressure surface (7) and blade top pressure surface (8), blade leading edge (3), blade trailing edge (4) distribute on the both sides side of blade suction surface and blade pressure surface.
2. The two-stage noise reduction blade of the axial flow fan according to claim 1, wherein: one side of the blade front edge (3) is in smooth transition connection with one side of the suction surface of the blade, and the other side of the blade front edge (3) is in smooth transition connection with one side of the pressure surface of the blade.
3. The two-stage noise reduction blade of the axial flow fan according to claim 1, characterized in that: one side edge of the blade tail edge (4) is in smooth transition connection with the other side edge of the suction surface of the blade, and the other side edge of the blade tail edge (4) is in smooth transition connection with the other side edge of the pressure surface of the blade.
4. The two-stage noise reduction blade of the axial flow fan according to claim 1, characterized in that: and the blade root suction surface (5) and the blade top suction surface (6) on the blade suction surface are arranged along the radial direction.
5. The two-stage noise reduction blade of the axial flow fan according to claim 1, characterized in that: and the blade root pressure surface (7) and the blade top pressure surface (8) on the blade pressure surface are arranged along the radial direction.
6. The two-stage noise reduction blade of the axial flow fan according to claim 1, characterized in that: the blade root suction surface (5) and the blade top suction surface (6) are in smooth transition connection, and the blade root pressure surface (7) and the blade top pressure surface (8) are in smooth transition connection.
7. The two-stage noise reduction blade of the axial flow fan according to claim 1, characterized in that: the suction surface and the pressure surface of the blades on the fan blade (1) can be designed into 2 or more curved surfaces and arc surfaces which are radially arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122398356.3U CN217029407U (en) | 2022-03-24 | 2022-03-24 | Two-section noise reduction blade of axial flow fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122398356.3U CN217029407U (en) | 2022-03-24 | 2022-03-24 | Two-section noise reduction blade of axial flow fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217029407U true CN217029407U (en) | 2022-07-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122398356.3U Active CN217029407U (en) | 2022-03-24 | 2022-03-24 | Two-section noise reduction blade of axial flow fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217029407U (en) |
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2022
- 2022-03-24 CN CN202122398356.3U patent/CN217029407U/en active Active
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