CN221053986U - Centrifugal wind wheel with noise reduction treatment of front edge - Google Patents
Centrifugal wind wheel with noise reduction treatment of front edge Download PDFInfo
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- CN221053986U CN221053986U CN202322665277.3U CN202322665277U CN221053986U CN 221053986 U CN221053986 U CN 221053986U CN 202322665277 U CN202322665277 U CN 202322665277U CN 221053986 U CN221053986 U CN 221053986U
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- 239000012530 fluid Substances 0.000 abstract description 4
- 230000007704 transition Effects 0.000 abstract description 4
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model relates to a centrifugal wind wheel with noise reduction treatment of a front edge, which comprises a plurality of blades circumferentially distributed on a wheel disc, wherein the front edge of each blade is provided with a plurality of vortex breaking convex blocks which are arranged at intervals; the outer surface of the vortex breaking convex block is provided with an air guide surface which is an air guide cambered surface or an air guide curved surface; an air guide gap is formed between the two vortex breaking convex blocks. The wind-guiding cambered surface or the wind-guiding cambered surface is favorable for smooth transition of fluid, the front edge of each blade is provided with a plurality of vortex breaking convex blocks which are arranged at intervals, so that the karman vortex street wake of the blade can be obviously changed, the regular periodic vortex staggering phenomenon is not presented any more, the wake vortex quantity is obviously changed from large vortex to small vortex, and the thickness of the wake vortex is thinned. Noise is effectively reduced.
Description
Technical Field
The utility model relates to a centrifugal wind wheel, in particular to a centrifugal wind wheel with noise reduction treatment at the front edge.
Background
In the existing backward centrifugal wind wheel, a noise reduction structure is generally arranged on a blade, such as an air hole is arranged on the surface of the blade, or a plurality of tooth-shaped structures are arranged on the front edge of the blade, such as a centrifugal wind wheel disclosed in Chinese patent number 202120344518.2; the toothed structure is easy to remain in the mould when the mould is injection molded, so that the mould is polluted, and the toothed more sharp part is easy to scratch the packaging bag structure when packaging.
The applicant further realizes noise reduction treatment, and a noise reduction structure is additionally designed on the front edge of the blade of the centrifugal wind wheel.
Disclosure of utility model
The utility model aims to provide a centrifugal wind wheel with noise reduction treatment at the front edge, wherein a plurality of vortex breaking convex blocks which are arranged at intervals are arranged at the front edge of each blade; the outer surface of the vortex breaking convex block is provided with an air guide surface which is an air guide cambered surface or an air guide curved surface; an air guide gap is formed between the two vortex breaking convex blocks. The wind cambered surface or the wind guiding curved surface is beneficial to smooth transition of fluid, the front edge of each blade is provided with a plurality of vortex breaking convex blocks which are arranged at intervals, so that the karman vortex street wake of the blade can be obviously changed, the regular periodic vortex staggering phenomenon is not presented any more, the wake vortex quantity is obviously changed from large vortex to small vortex, and the thickness of the wake vortex is thinned. Noise is effectively reduced.
The purpose of the utility model is realized in the following way:
A centrifugal wind wheel with noise reduction treatment of the front edge comprises a plurality of blades circumferentially distributed on a wheel disc, wherein the front edge of each blade is provided with a plurality of vortex breaking convex blocks which are arranged at intervals; the outer surface of the vortex breaking convex block is provided with an air guide surface which is an air guide cambered surface or an air guide curved surface; an air guide gap is formed between the two vortex breaking convex blocks. The wind guide cambered surface or the wind guide cambered surface is beneficial to smooth transition of fluid, can ensure that the karman vortex street wake of the blade is obviously changed, does not show regular periodic vortex interlacing phenomenon any more, the wake vortex quantity is obviously changed from large vortex to small vortex, and the thickness of the wake vortex is thinned. Noise is effectively reduced.
The wind-guiding surface is wind-guiding cambered surface or wind-guiding cambered surface when shipment or packing is carried out, is difficult to damage packaging structure, does not exist when the installation and breaks installer's both hands like sharp-toothed blade.
Each blade is provided with a plurality of turbulence convex blocks which are arranged at intervals at the position far away from the front edge; a turbulent flow gap is formed between the two turbulent flow convex blocks, so that wind resistance is reduced, and noise generated when the centrifugal wind wheel rotates is further reduced.
Each blade is provided with a plurality of turbulence convex blocks for increasing the mechanical strength of the blade at a position far away from the front edge, so that the mechanical strength of the blade is increased, and the blade is not easy to generate deformation.
The outer surface of the vortex breaking convex block comprises a first arc section, a second arc section and a third arc section; the first arc section is positioned between the second arc section and the third arc section; the second arc section and the third arc section are symmetrically or asymmetrically arranged.
The included angle between the second arc section and the third arc section is A, and the A is 45-60 degrees.
The diameter of the front edge of each blade is B, and B is 8mm to 12mm; the outer diameter of the first arc section is C, and C is 1.8Bmm to 2.5Bmm; the second arc segment and/or the third arc segment has an outer diameter D of 0.6Bmm to 0.9Bmm.
The outer surface of the vortex breaking convex block also comprises a first line segment connected with the second arc segment and a second line segment connected with the third arc segment; the first line segment and the second line segment are straight lines, arcs or curves, the length of the first line segment and/or the second line segment is E, and E is 0.2Bmm to 0.4Bmm.
At least part of the first line segment and the second line segment are vertically arranged on the outer wall of the front edge of the blade.
Each vortex breaking bump has a thickness G of 0.8Bmm to 1.2Bmm.
The interval between two vortex breaking convex blocks is F, and F is 2mm to 6mm; the intervals among the vortex breaking convex blocks are equal or unequal; the front edge of each blade is an arc segment or a curve segment, and a plurality of vortex breaking convex blocks are arranged on the front edge of each blade in an arc or curve arrangement; the heights of the vortex breaking convex blocks are the same or different.
The beneficial effects of the utility model are as follows:
The wind-guiding cambered surface or the wind-guiding cambered surface is favorable for smooth transition of fluid, the front edge of each blade is provided with a plurality of vortex breaking convex blocks which are arranged at intervals, so that the karman vortex street wake of the blade can be obviously changed, the regular periodic vortex staggering phenomenon is not presented any more, the wake vortex quantity is obviously changed from large vortex to small vortex, and the thickness of the wake vortex is thinned. Noise is effectively reduced.
Drawings
Fig. 1 is a schematic perspective view of a centrifugal wind wheel according to an embodiment of the present utility model.
Fig. 2 is a schematic perspective view illustrating an arrangement of vortex breaking protrusions arranged in an arc or curve manner according to an embodiment of the present utility model.
FIG. 3 is a schematic view illustrating a blade with turbulence bumps according to an embodiment of the present utility model.
FIG. 4 is a schematic view of a vortex breaker bump according to an embodiment of the present utility model disposed on the leading edge of a blade.
Fig. 5 is a schematic structural diagram of an intersection line of two arc lines of a vortex breaking bump according to an embodiment of the present utility model.
Fig. 6 is a schematic diagram of a karman vortex street wake structure of a conventional centrifugal wind wheel and the present centrifugal wind wheel according to an embodiment of the present utility model.
Detailed Description
The utility model is further described below with reference to the drawings and examples.
Referring to fig. 1-6, a centrifugal wind wheel with noise reduction treatment on the front edge comprises a plurality of blades 1 circumferentially distributed on a wheel disc 2, wherein the front edge of each blade 1 is provided with a plurality of vortex breaking convex blocks 3 which are arranged at intervals; the outer surface of the vortex breaking convex block 3 is provided with an air guide surface 4, and the air guide surface 4 is an air guide cambered surface or an air guide curved surface; an air guide gap is formed between the two vortex breaking convex blocks 3. The front edge of each blade is provided with a plurality of vortex breaking convex blocks which are arranged at intervals, so that the karman vortex street wake of the blade can be obviously changed, the regular periodic vortex interlacing phenomenon is not presented any more, the wake vortex quantity is obviously changed from large vortex to small vortex, the thickness of the wake vortex is thinned, as shown in fig. 6, the left side of fig. 6 is an experimental pattern diagram of the conventional centrifugal wind wheel, and the right side of fig. 6 is an experimental pattern diagram of the centrifugal wind wheel. Noise is effectively reduced.
The test data are as follows:
Each blade 1 is provided with a plurality of turbulence convex blocks 5 which are arranged at intervals at the position far away from the front edge; a turbulent flow gap is formed between two turbulent flow convex blocks 5.
Each blade 1 is provided with a number of turbulence bumps 5 at a location remote from the leading edge for increasing the mechanical strength of the blade 1.
The outer surface of the vortex breaking convex block 3 comprises a first arc section 6, a second arc section 7 and a third arc section 8; the first arc section 6 is positioned between the second arc section 7 and the third arc section 8; the second arc section 7 and the third arc section 8 are symmetrically or asymmetrically arranged.
The intersecting included angle between the second arc section 7 and the third arc section 8 is A, and the A is 45-60 degrees.
The diameter of the front edge of each blade 1 is B, and B is 8mm to 12mm; the outer diameter of the first circular arc section 6 is C, and C is 1.8Bmm to 2.5Bmm; the second arc segment 7 and/or the third arc segment 8 has an outer diameter D of 0.6Bmm to 0.9Bmm.
The outer surface of the vortex breaking convex block 3 also comprises a first line segment 9 connected with the second circular arc segment 7 and a second line segment 10 connected with the third circular arc segment 8; the first line segment 9 and the second line segment 10 are straight lines, arcs or curves, the length of the first line segment 9 and/or the second line segment 10 is E, and E is 0.2Bmm to 0.4Bmm.
The first line segment 9 and the second line segment 10 are at least partially arranged on the outer wall of the front edge of the blade 1 vertically.
Each vortex breaking bump 3 has a thickness G of 0.8Bmm to 1.2Bmm.
The interval between two vortex breaking convex blocks 3 is F, and F is 2mm to 6mm; the intervals among the vortex breaking convex blocks 3 are equal or unequal; the front edge of each blade 1 is an arc segment or a curve segment, and a plurality of vortex breaking convex blocks 3 are arranged on the front edge of each blade 1 in an arc or curve arrangement; the heights of the vortex breaking convex blocks 3 are the same or different.
The foregoing is a preferred embodiment of the utility model showing and describing the general principles, features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the foregoing embodiments, which have been described in the foregoing description merely illustrates the principles of the utility model, and that various changes and modifications may be made therein without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides a centrifugal wind wheel of leading edge noise reduction processing, is a plurality of blade (1) on rim plate (2) including being circumference distribution, its characterized in that: the front edge of each blade (1) is provided with a plurality of vortex breaking convex blocks (3) which are arranged at intervals; the outer surface of the vortex breaking convex block (3) is provided with an air guide surface (4), and the air guide surface (4) is an air guide cambered surface or an air guide curved surface; an air guide gap is formed between the two vortex breaking convex blocks (3) at intervals.
2. The centrifugal wind wheel with leading edge noise reduction treatment according to claim 1, wherein: each blade (1) is provided with a plurality of turbulence convex blocks (5) which are arranged at intervals at the position far away from the front edge; a turbulent flow gap is formed between two turbulent flow convex blocks (5) which are separated.
3. The centrifugal wind wheel with leading edge noise reduction treatment according to claim 1, wherein: each blade (1) is provided with a plurality of turbulence convex blocks (5) which are used for increasing the mechanical strength of the blade (1) at the position far away from the front edge.
4. The centrifugal wind wheel with leading edge noise reduction treatment according to claim 1, wherein: the outer surface of the vortex breaking convex block (3) comprises a first circular arc section (6), a second circular arc section (7) and a third circular arc section (8); the first arc section (6) is positioned between the second arc section (7) and the third arc section (8); the second arc section (7) and the third arc section (8) are symmetrically or asymmetrically arranged.
5. The centrifugal wind wheel with leading edge noise reduction treatment according to claim 4, wherein: the included angle between the second arc section (7) and the third arc section (8) is A, and A is 45-60 degrees.
6. The centrifugal wind wheel with leading edge noise reduction treatment according to claim 4, wherein: the diameter of the front edge of each blade (1) is B, and B is 8mm to 12mm; the outer diameter of the first circular arc section (6) is C, and C is 1.8Bmm to 2.5Bmm; the second arc section (7) and/or the third arc section (8) has an outer diameter D of 0.6Bmm to 0.9Bmm.
7. The centrifugal wind wheel with leading edge noise reduction treatment according to claim 6, wherein: the outer surface of the vortex breaking convex block (3) further comprises a first line segment (9) connected with the second circular arc segment (7) and a second line segment (10) connected with the third circular arc segment (8); the first line segment (9) and the second line segment (10) are straight lines, arcs or curves, the length of the first line segment (9) and/or the second line segment (10) is E, and E is 0.2Bmm to 0.4Bmm.
8. The centrifugal wind wheel with leading edge noise reduction treatment according to claim 7, wherein: at least part of the first line segment (9) and the second line segment (10) are vertically arranged on the outer wall of the front edge of the blade (1).
9. The centrifugal wind wheel with leading edge noise reduction treatment according to claim 6, wherein: each vortex breaking convex block (3) has a thickness G of 0.8Bmm to 1.2Bmm.
10. The centrifugal wind wheel with leading edge noise reduction treatment according to claim 1, wherein: the interval between two vortex breaking convex blocks (3) is F, and F is 2mm to 6mm; the intervals among the vortex breaking convex blocks (3) are equal or unequal; the front edge of each blade (1) presents an arc segment or a curve segment, and a plurality of vortex breaking convex blocks (3) are arranged on the front edge of each blade (1) in an arc or curve arrangement; the heights of the vortex breaking convex blocks (3) are the same or different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322665277.3U CN221053986U (en) | 2023-09-28 | 2023-09-28 | Centrifugal wind wheel with noise reduction treatment of front edge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322665277.3U CN221053986U (en) | 2023-09-28 | 2023-09-28 | Centrifugal wind wheel with noise reduction treatment of front edge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221053986U true CN221053986U (en) | 2024-05-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322665277.3U Active CN221053986U (en) | 2023-09-28 | 2023-09-28 | Centrifugal wind wheel with noise reduction treatment of front edge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221053986U (en) |
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2023
- 2023-09-28 CN CN202322665277.3U patent/CN221053986U/en active Active
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