CN107355424B - Axial flow fan blade and fan and air conditioner outdoor unit with same - Google Patents
Axial flow fan blade and fan and air conditioner outdoor unit with same Download PDFInfo
- Publication number
- CN107355424B CN107355424B CN201710431930.6A CN201710431930A CN107355424B CN 107355424 B CN107355424 B CN 107355424B CN 201710431930 A CN201710431930 A CN 201710431930A CN 107355424 B CN107355424 B CN 107355424B
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- China
- Prior art keywords
- blade
- rectifying plate
- axial flow
- flow fan
- fan blade
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- F04D29/38—Blades
- F04D29/388—Blades characterised by construction
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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
-
- 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
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
-
- 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
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
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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
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to an axial flow fan blade and a fan and an air conditioner outdoor unit with the same, wherein the axial flow fan blade comprises a central shaft sleeve (1) and a plurality of blades (2) circumferentially and uniformly distributed on the peripheral wall of the central shaft sleeve (1), each blade (2) is provided with a suction surface (3) and a pressure surface (4), and the axial flow fan blade is characterized in that: a rectifying plate (5) is arranged on the suction surface (3) at the tail edge of each blade (2), a gap (6) is formed between the rectifying plate (5) and the blade (2), and the gap (6) at the front edge of the rectifying plate (5) is larger than the gap (6) at the tail edge of the rectifying plate (5); the fan comprises a motor and the axial flow fan blade; the outdoor unit of the air conditioner comprises the fan. The invention has the advantages that: simple structure, it is convenient to make to can not only improve the rectification effect, can effectively reduce vortex noise moreover.
Description
Technical Field
The invention relates to a fan blade, in particular to an axial flow fan blade, a fan with the axial flow fan blade and an air conditioner outdoor unit.
Background
The outdoor unit of air conditioner generally adopts axial flow fan blade as its radiating component, and at present, current axial flow fan blade generally includes center axle sleeve and a plurality of blades of circumference equipartition on center axle sleeve periphery wall. The main reason that the axial flow fan blade can generate vortex noise in the rotating process is that when the axial flow fan blade rotates, a large pressure difference exists between the pressure surface and the suction surface of the blade, so that when the airflow flowing through the pressure surface of the blade and the airflow flowing through the suction surface of the blade meet at the tail edge of the blade, the high-pressure airflow on the pressure surface flows to low pressure to generate reflux, so that the airflow at the tail edge of the blade generates airflow vortex, and further vortex noise is generated. The existing axial flow fan blades on the market achieve a certain effect in reducing vortex noise, but the vortex noise generated by the axial flow fan blades during rotation is still larger.
Disclosure of Invention
The first technical problem to be solved by the invention is to provide the axial flow fan blade which has a simple structure, is convenient to manufacture, can improve the rectifying effect and can effectively reduce the eddy current noise.
The second technical problem to be solved by the invention is to provide a fan with the axial flow fan blade.
The third technical problem to be solved by the invention is to provide an air conditioner outdoor unit with the axial flow fan blade.
In order to solve the first technical problem, the invention provides an axial flow fan blade with the following structure: including center axle sleeve and circumference equipartition on center axle sleeve periphery wall a plurality of blades, every blade all has suction face and pressure face, wherein, all is equipped with a rectification board on the suction face of every blade trailing edge department, has the clearance between rectification board and the blade, and the clearance of rectification board leading edge department is greater than the clearance of rectification board trailing edge department.
The axial flow fan blade provided by the invention has the advantages that the bending curvature of the rectifying plate is the same as that of the tail edge of the fan blade.
The invention relates to an axial flow fan blade, wherein a rectifying plate is connected to the fan blade through at least one supporting column.
The axial flow fan blade provided by the invention is characterized in that the rectifying plate, the blades and the supporting columns for connecting the rectifying plate and the blades are integrated.
The invention discloses an axial flow fan blade, wherein a plurality of blind holes are uniformly distributed on the surface of a rectifying plate, which faces away from the suction surface of the blade.
The axial flow fan blade provided by the invention has the advantages that the depth of the blind hole is 2/5-3/5 of the thickness of the rectifying plate.
The axial flow fan blade provided by the invention has the advantages that the width of the rectifying plate is 5-20 mm.
The axial flow fan blade provided by the invention has the advantages that the thickness of the rectifying plate is 2-5 mm.
The axial flow fan blade provided by the invention has the advantages that the distance of the gap is 6-7.5 mm.
The invention discloses an axial flow fan blade, wherein a chamfer transition section for clearance air inlet is formed at the front edge of a rectifying plate.
In order to solve the second technical problem, the invention provides a fan with the following structure: comprises a motor and the axial flow fan blade.
In order to solve the third technical problem, the invention provides an air conditioner outdoor unit with the following structure: the fan comprises the fan.
After adopting the structure, compared with the prior art, the invention has the following advantages: after the rectifying plate is arranged, when the air flow flowing through the suction surface of the blade reaches the tail edge of the blade, the air flow is divided into an upper layer and a lower layer by the rectifying plate, and because the gap at the front edge of the rectifying plate is larger than the gap at the tail edge of the rectifying plate, the air flow flowing through the lower layer (namely the gap between the rectifying plate and the blade) is compressed when passing through the gap, so that the pressure of the air flow is increased, and when the air flow and the air flow flowing through the pressure surface of the blade meet at the tail edge of the blade, the pressure difference at the tail edge can be reduced, the air flow of the pressure surface is prevented from flowing back to the suction surface, the vortex at the tail edge of the blade is greatly relieved, and the purpose of reducing vortex noise is achieved; in addition, the airflow flowing through the upper layer (namely the suction surface side of the rectifying plate) can flow smoothly after being rectified by the rectifying plate, so that the speed and the flow direction of the airflow are improved, the occurrence of airflow turbulence of the next blade caused by collision of the airflow and a blade guide device (generally a guide flow cover) is effectively reduced, the periodical rotating noise of the blade is reduced, the air outlet is smoother and smoother, and the rectifying effect of the axial flow blade is improved; in addition, the axial flow fan blade is only provided with the rectifying plate structure on each blade on the basis of the structure of the original fan blade, so that the original fan blade does not need to be modified, and the axial flow fan blade is simple in structure and convenient to manufacture.
Drawings
FIG. 1 is a schematic view of the perspective structure of an axial flow fan blade according to the present invention;
fig. 2 is an enlarged view of a portion a in fig. 1.
Detailed Description
The axial flow fan blade and the fan with the axial flow fan blade and the air conditioner outdoor unit are further described in detail below with reference to the accompanying drawings and the specific embodiments.
As shown in fig. 1 and 2, the invention provides an axial flow fan blade, which comprises a central shaft sleeve 1 and a plurality of blades 2 circumferentially and uniformly distributed on the peripheral wall of the central shaft sleeve 1, wherein each blade 2 is provided with a suction surface 3 and a pressure surface 4, the suction surface 3 at the tail edge of each blade 2 is provided with a rectifying plate 5, a gap 6 is arranged between the rectifying plate 5 and the blade 2, and the gap 6 at the front edge of the rectifying plate 5 is larger than the gap 6 at the tail edge of the rectifying plate 5; the bending curvature of the rectifying plate 5 is the same as that of the tail edge of the blade 2, so that the design of the rectifying plate 5 can be greatly facilitated, and the rectifying effect of the whole axial flow fan blade can be further improved, and the vortex noise effect can be reduced; the rectifying plate 5 is connected to the blade 2 through at least one supporting column 7, one supporting column 7 is used for connecting the rectifying plate 5 and the blade 2, the other supporting column 7 is used for ensuring the structural strength of the rectifying plate 5, so that the rectifying plate cannot deform in the rotating process of the axial flow fan blade, the rectifying effect of the whole axial flow fan blade and the effect of reducing vortex noise are ensured, the number of the supporting columns 7 can be determined according to the length of the rectifying plate 5, if the blade 2 is smaller and the rectifying plate 5 is shorter, the number of the supporting columns 7 can be only one, if the blade 2 is larger and the rectifying plate 5 is longer, the number of the supporting columns 7 can be correspondingly increased to two, three or more, and all the supporting columns 7 are preferably uniformly distributed in the length direction of the rectifying plate 5; the rectifying plate 5, the blades 2 and the supporting columns 7 for connecting the rectifying plate 5 and the blades 2 are integrated, so that other fixing structures are not needed among the rectifying plate 5, the blades 2 and the supporting columns 7, and the design and the manufacture of the axial flow fan blade are greatly facilitated; the surface of the rectifying plate 5, which is opposite to the suction surface 3 of the blade 2, is uniformly provided with a plurality of blind holes 8, so that the roughness of the rectifying plate 5 is increased, and when the axial flow fan rotates, turbulence is generated at the blind holes 8, so that the airflow field of the axial flow fan changes at the rectifying plate 5, the boundary layer separation caused by the excessively high airflow speed is effectively prevented, the rotation noise frequency of the axial flow fan which is originally relatively fixed is dispersed into a wider spectrum, and the energy carried by the main frequency of the axial flow fan is further weakened, so that the rotation noise of the axial flow fan is effectively reduced; the depth of the blind hole 8 is 2/5-3/5 of the thickness of the rectifying plate 5, preferably 1/2, when the rectifying plate 5 is thicker, the depth of the blind hole 8 can be properly reduced, and when the rectifying plate 5 is thinner, the depth of the blind hole 8 can be properly increased, so that the purpose of ensuring that the depth of the blind hole 8 is not too shallow is to ensure that the effect of reducing the rotation noise of the axial flow fan blade; the width of the rectifying plate 5 is 5-20 mm, preferably 6mm, 12mm and 18mm, and the width of the rectifying plate 5 is selected in the range, so that the axial flow fan blade can achieve the purpose of reducing vortex noise, and the rectifying effect of the rectifying plate 5 can be ensured, and in the aspect of the width selection of the rectifying plate 5, when the blade 2 is larger, the width of the rectifying plate 5 is also larger, and when the blade 2 is smaller, the width of the rectifying plate 5 is also smaller; the thickness of the rectifying plate 5 is 2-5 mm, preferably 2.5mm, 3.5mm and 4.5mm, and the thickness of the rectifying plate 5 is selected within the range, so that the structural strength of the rectifying plate 5 is ensured, and the rectifying plate 5 cannot deform in the rotating process of the axial flow fan blade, thereby ensuring the rectifying effect of the whole axial flow fan blade and reducing the vortex noise effect, and the thickness of the rectifying plate 5 is selected to be larger when the blade 2 is larger and smaller when the blade 2 is smaller; the distance of the gap 6 is 6-7.5 mm, preferably 6.2mm, 6.7mm and 7.2mm, and the distance of the gap 6 is selected within the range, so that the axial flow fan blade can achieve the purpose of reducing vortex noise, and the rectification effect of the rectification plate 5 can be ensured, and the distance of the gap 6 is selected so that the distance of the gap 6 is larger when the blade 2 is larger and the distance of the gap 6 is smaller when the blade 2 is smaller; the front edge prescription of rectification board 5 just the chamfer changeover portion 9 of clearance 6 air inlet, the setting of chamfer changeover portion 9 can help rectification board 5 to introduce more into gap 6 the air current that flows through the suction face 3 of blade 2, and then can further reduce the pressure differential of blade 2 trailing edge department, prevents that blade 2 pressure face 4 air current from flowing backward to the suction face to alleviate the vortex of blade 2 trailing edge department greatly, reach the purpose that reduces vortex noise.
The invention also provides a fan which comprises a motor and the axial flow fan blade in the embodiment.
The invention also provides an air conditioner outdoor unit which comprises the fan in the embodiment.
The above examples are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solution of the present invention should fall within the scope of protection defined by the claims of the present invention without departing from the spirit of the present invention.
The suction surface airflow is divided into two layers through the action of the rectifying plate, and the pressure of the lower air flow is increased through the gap S, so that the pressure difference between the lower air flow and the pressure surface is reduced, and vortex shedding noise generated at the junction tail edge of the pressure suction surface due to overlarge pressure difference is prevented; the upper air flow passes through the rectifying plate to improve the speed and direction of the air flow, reduce the intersection of the air flows in different directions and make the air outlet smoother. In conclusion, the airflow at the tail edge of the suction surface is divided into two layers through the rectifying plate, the lower layer of airflow is pressurized and then is intersected with the airflow of the pressure surface, and the upper layer of airflow smoothly flows out after being rectified, so that noise of the fan blade is improved. Experiments prove that the noise is reduced by 1.5dB (A).
Reducing the pressure difference at the tail edges of the pressure surface and the suction surface through a gap S at the bottom of the rectifying plate, and controlling vortex noise; and meanwhile, the plane at the top of the rectifying plate rectifies the airflow of the back pressure surface, so that the mutual influence of the tail edges caused by different airflow speed directions is reduced, and the effect of reducing vortex noise of the tail edges of the axial flow fan blades is achieved.
The main reason is that when the axial flow fan blade rotates, a large pressure difference exists between the pressure surface and the suction surface of the blade, so that when the airflow flowing through the pressure surface of the blade and the airflow flowing through the suction surface of the blade meet at the tail edge of the blade, airflow vortex can be generated at the tail edge of the blade, and vortex noise is generated. The existing axial flow fan blades on the market achieve a certain effect in reducing vortex noise, but the vortex noise generated by the axial flow fan blades during rotation is still larger.
Claims (10)
1. The utility model provides an axial fan blade, includes center axle sleeve (1) and circumference equipartition a plurality of blades (2) on center axle sleeve (1) peripheral wall, every blade (2) all have suction face (3) and pressure face (4), its characterized in that: the suction surface (3) at the tail edge of each blade (2) is provided with a rectifying plate (5), a gap (6) is formed between the rectifying plate (5) and the blade (2), the gap (6) at the front edge of the rectifying plate (5) is larger than the gap (6) at the tail edge of the rectifying plate (5), the rectifying plate (5) is connected to the blade (2) through at least one supporting column (7), and the front edge of the rectifying plate (5) is provided with a chamfer transition section (9) for air inlet of the gap (6).
2. The axial flow fan blade of claim 1, wherein: the curvature of the rectifying plate (5) is the same as the curvature of the trailing edge of the blade (2).
3. The axial flow fan blade of claim 1, wherein: the rectifying plate (5), the blades (2) and the supporting columns (7) for connecting the rectifying plate (5) and the blades (2) are integrated.
4. The axial flow fan blade of claim 1, wherein: a plurality of blind holes (8) are uniformly distributed on the surface of the rectifying plate (5) facing away from the suction surface (3) of the blade (2).
5. The axial flow fan blade of claim 4, wherein: the depth of the blind hole (8) is 2/5~3/5 of the thickness of the rectifying plate (5).
6. The axial flow fan blade of claim 1, wherein: the width of the rectifying plate (5) is 5-20 mm.
7. The axial flow fan blade of claim 1, wherein: the thickness of the rectifying plate (5) is 2-5 mm.
8. The axial flow fan blade of claim 1, wherein: the distance between the gaps (6) is 6-7.5 mm.
9. A fan, characterized in that: comprising an electric motor and an axial flow fan blade according to any one of claims 1 to 8.
10. An outdoor unit of an air conditioner, characterized in that: comprising the blower of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710431930.6A CN107355424B (en) | 2017-06-09 | 2017-06-09 | Axial flow fan blade and fan and air conditioner outdoor unit with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710431930.6A CN107355424B (en) | 2017-06-09 | 2017-06-09 | Axial flow fan blade and fan and air conditioner outdoor unit with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107355424A CN107355424A (en) | 2017-11-17 |
| CN107355424B true CN107355424B (en) | 2023-07-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710431930.6A Active CN107355424B (en) | 2017-06-09 | 2017-06-09 | Axial flow fan blade and fan and air conditioner outdoor unit with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107355424B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI650488B (en) * | 2018-06-25 | 2019-02-11 | 行政院原子能委員會核能研究所 | Noise-reduction device for wind turbine and the wind turbine applied thereof |
| CN109236729B (en) * | 2018-09-28 | 2020-12-01 | 广州合众富华节能环保科技有限公司 | Drainage impeller |
| CN109958641A (en) * | 2019-05-08 | 2019-07-02 | 中山宜必思科技有限公司 | A kind of axial flow blower structure of high-efficient low-noise |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05141394A (en) * | 1991-11-18 | 1993-06-08 | Matsushita Seiko Co Ltd | Axial flow fan |
| JPH07269493A (en) * | 1994-03-31 | 1995-10-17 | Matsushita Seiko Co Ltd | Axial fan for joint use of intake and exhaust |
| DE102008040698A1 (en) * | 2008-07-24 | 2010-01-28 | Robert Bosch Gmbh | Fan i.e. axial flow fan, for use as ventilator for cooling electronic device i.e. personal computer, has fan blades whose front edges point in rotational direction of fan wheel, and slat separated from front edge of fan blade by air gap |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06100193B2 (en) * | 1988-12-09 | 1994-12-12 | ダイキン工業株式会社 | Blower |
| JP2004011423A (en) * | 2002-06-03 | 2004-01-15 | Daikin Ind Ltd | Air flow control structure of air blowing section |
| CN102828996B (en) * | 2011-06-14 | 2015-12-16 | 珠海格力电器股份有限公司 | Axial fan |
| CN106593952B (en) * | 2017-01-12 | 2022-08-26 | 珠海格力电器股份有限公司 | Axial flow fan blade and fan and air conditioner outdoor unit with same |
| CN207093453U (en) * | 2017-06-09 | 2018-03-13 | 奥克斯空调股份有限公司 | Axial-flow leaf and there is its blower fan and air-conditioner outdoor unit |
-
2017
- 2017-06-09 CN CN201710431930.6A patent/CN107355424B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05141394A (en) * | 1991-11-18 | 1993-06-08 | Matsushita Seiko Co Ltd | Axial flow fan |
| JPH07269493A (en) * | 1994-03-31 | 1995-10-17 | Matsushita Seiko Co Ltd | Axial fan for joint use of intake and exhaust |
| DE102008040698A1 (en) * | 2008-07-24 | 2010-01-28 | Robert Bosch Gmbh | Fan i.e. axial flow fan, for use as ventilator for cooling electronic device i.e. personal computer, has fan blades whose front edges point in rotational direction of fan wheel, and slat separated from front edge of fan blade by air gap |
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| Publication number | Publication date |
|---|---|
| CN107355424A (en) | 2017-11-17 |
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