CN201159203Y - Low noise axial fan blade - Google Patents
Low noise axial fan blade Download PDFInfo
- Publication number
- CN201159203Y CN201159203Y CNU2008200222666U CN200820022266U CN201159203Y CN 201159203 Y CN201159203 Y CN 201159203Y CN U2008200222666 U CNU2008200222666 U CN U2008200222666U CN 200820022266 U CN200820022266 U CN 200820022266U CN 201159203 Y CN201159203 Y CN 201159203Y
- Authority
- CN
- China
- Prior art keywords
- blade
- fan blade
- low noise
- axial fan
- fan
- Prior art date
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses a low noise axial flow fan blade, the fan blade is of sweep-forward type, and is in the shape of a sharp angle of 20 degrees to 35 degrees, the fan blade is in the shape of a curved surface in the radial direction and the tangential direction, each circumference section of the fan blade is of airfoil type, and the relative thickness thereof is 4%-12%, the fan blade is gradually thicker from the blade tip to the blade root, one or more blade knives are arranged on the surface of the fan blade, a connecting piece which is fixed with a wheel hub is arranged on the fan blade, and the key point comprises that the rear edge of the fan blade is designed to be a structure of corrugated curved sections. The low noise axial flow fan blade integrates four structure characteristics that the fan blade is of sweep-forward type and the fan blade is in the shape of an airfoil, which reduces the noise of the blades, the blade knives are arranged on the surface of the fan blade, the rear edge of the fan blade is designed to be the corrugated curved section and the like, thereby largely increasing the effect of reducing noise, and in particular reducing the low-frequency noise of the fan. The low noise fan made of the fan blade is a perfect novel low noise axial flow fan.
Description
Affiliated technical field
The utility model relates to the blower fan technical field, specifically a kind of blade of low noise axial fan.
Background technique
Facts have proved that the structure of fan blade is the key factor of decision fan noise size.For a long time, in order to improve the blower fan quality, reduce noise, the relevant personnel have carried out unremitting effort on the structure of improving fan blade.As application number is 200510016954.2, name is called the Chinese invention patent of " low noise fan blade ", the viewpoint of " surperficial non-smooth morphology is to reduce the key factor of motion noise " has been proposed, the non-smooth surface with spherical convex closure cell cube is made on the fan blade surface for this reason, reduced the noise of blower fan effectively.And for example notice of authorization number is CN2437887Y, name is called the Chinese utility model patent of " propeller fan with crimping blade ", according to the pressure reduction between the positive suction surface of fan blade along with distance of shaft centers from the reason that increases of increase, think the pressure reduction maximum of blade edge, blade rear edge is made towards the upward bent bead structure of inlet stream direction for this reason, reduced the noise that fan blade produced equally.Defectives such as but the structural improvement of above-mentioned blade exists functional structure single, and the effect that noise reduces is limited can satisfy the technical requirements of ultra-low noise blower fan far from.
Summary of the invention
In order to overcome the existing bigger deficiency of axial-flow blower noise, it is a kind of reasonable in design that the utility model provides, the low noise axial fan blade of novel structure.
The technological scheme that its technical problem that solves the utility model adopts is: this low noise axial fan blade, and this blade is a sweepforward, is 20 °～35 ° acute angle shape; Blade radially all is being curve form with tangential both direction, and tangential curvature is r
1/ R=0.6～1.2, radial buckling are r
2/ R=1.5～2.3 are in the formula: r
1Be the tangential radius of arc of blade, r
2Be the radially radius of arc of blade, R is the radius of impeller; Each circumference tangent plane of blade is a wing blade, and its relative thickness is 4%～12%, from leaf push up to blade root by Bao Jianhou; Surface at blade also can be provided with one or multi-channel leaf cutter, and it highly is 1.5～4%D, and D is an impeller diameter; Mainly be that rear edge with said blade is made as corrugated curved sections structure, the wide A=0.015～0.030D of said corrugated curved sections, wavelength B=0.031～0.065D, crest height of wave C=0.009～0.020D, wherein D is an impeller diameter; Said blade is provided with the erection column that is connected and fixed with wheel hub on the blade root edge, perhaps be provided with the mounting hole that is connected and fixed with wheel hub on blade, is connected with wheel hub by rivet or bolt, also can be arranged to the linkage structure as a whole with wheel hub to blade.
The utility model is the improvement on the applicant CN2767723Y utility model patent basis, advantage compared with prior art:
At first, further reduced the noise of blade.Because trailing edge because of boundary effect, will inevitably produce eddy current, the maximum sound level value is at the frequency place, whirlpool that comes off usually.The ripple struction of trailing edge has changed the coming off and tail of formation, whirlpool in whirlpool, has just changed noise spectrum, has reduced the low frequency sound level, thereby has reduced the low-frequency noise that makes one nervous.
Secondly, will have the sweepforward that reduces blade noise, wing blade, be provided with the leaf cutter and the rear edge of blade is made as four structural features such as corrugated curved sections at blade surface and be combined in one, improve the General of reduction noise greatly.This improved blade is reduced to below the 21db (A) than A sound level Lsa, and slippage is about 4-8db (A).
The 3rd, blade can be arranged to the linkage structure as a whole with wheel hub, not only simplified installation procedure, reduce the weight of impeller, but also can further reduce noise.Therefore, the blower fan that adopts this blade to produce is desirable low noise axial fan of new generation.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is that the utility model rear edge is the left TV structure schematic representation of corrugated curved sections;
Fig. 3 is the structural representation of the utility model band erection column;
Fig. 4 is the structural representation that the utility model is connected with wheel hub by mounting hole and bolt;
Fig. 5 is the as a whole linkage structure schematic representation of the utility model and wheel hub.
1. blade rear edge among the figure, 2. leaf cutter, 3. mounting hole, 4. blade, 5. wheel hub, 6. erection column.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in detail:
Shown in Fig. 1,2,4, this low noise axial fan blade, its blade 4 is a sweepforward, is 30 ° acute angle shape.Described blade 4 radially all is being curve form with tangential both direction, and tangential curvature is r
1/ R=0.6～1.2, radial buckling are r
2/ R=1.5～2.3 are in the formula: r
1Be the tangential radius of arc of blade 4, r
2Be the radially radius of arc of blade 4, R is the radius of impeller.Each circumference tangent plane of blade 4 is a wing blade, and its relative thickness is 4%～12%, from leaf push up to blade root by Bao Jianhou.Be provided with twice leaf cutter 2 on the surface of blade 4, it highly is 2%D, and D is an impeller diameter.Mainly be that rear edge 1 with blade is made as corrugated curved sections 1 structure, the parameter of corrugated curved sections 1 is: the wide A=0.016D of curved sections, and wavelength B=0.033D, crest height of wave C=0.0093D, wherein D is an impeller diameter.Mounting hole and wheel hub 5 that blade pass is crossed on rivet and the blade are connected and fixed, and form the low noise impeller.This low noise impeller can be made up of two blades, three blades or four blades.
As shown in Figure 3, the utility model also can be connected and fixed with wheel hub 5 by the erection column 6 that is arranged on the blade root edge, forms the low noise impeller.
As shown in Figure 5, described blade is arranged to the linkage structure as a whole with wheel hub, has been made up of three blades and the as a whole low noise impeller of wheel hub.Also can form low noise impeller by 4 blades.
Claims (6)
1, a kind of low noise axial fan blade comprises that blade (4) is a sweepforward, is 20 °～35 ° acute angle shape; Blade radially all is being curve form with tangential both direction, and tangential curvature is r
1/ R=0.6～1.2, radial buckling are r
2/ R=1.5～2.3 are in the formula: r
1Be the tangential radius of arc of blade, r
2Be the radially radius of arc of blade, R is the radius of impeller; Each circumference tangent plane of blade is a wing blade, and its relative thickness is 4%～12%, from leaf push up to blade root by Bao Jianhou; It is characterized in that: the rear edge of described blade (1) is made as corrugated curved sections structure.
2, a kind of low noise axial fan blade according to claim 1 is characterized in that: also be provided with one or multi-channel leaf cutter (2) on the surface of blade, it highly is 1.5～4%D, and D is an impeller diameter.
3, a kind of low noise axial fan blade according to claim 1 is characterized in that: the wide A=0.015～0.030D of said corrugated curved sections, and wavelength B=0.031～0.065D, crest height of wave C=0.009～0.020D, wherein D is an impeller diameter.
4, a kind of low noise axial fan blade according to claim 2 is characterized in that: said blade (4) is provided with the erection column (6) that is connected and fixed with wheel hub (5) on the blade root edge.
5, a kind of low noise axial fan blade according to claim 2 is characterized in that: said blade (4) is provided with the mounting hole (3) that is connected and fixed with wheel hub (5).
6, a kind of low noise axial fan blade according to claim 2 is characterized in that: said blade (4) is provided with and the as a whole linkage structure of wheel hub (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200222666U CN201159203Y (en) | 2008-05-18 | 2008-05-18 | Low noise axial fan blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200222666U CN201159203Y (en) | 2008-05-18 | 2008-05-18 | Low noise axial fan blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201159203Y true CN201159203Y (en) | 2008-12-03 |
Family
ID=40109787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200222666U Expired - Fee Related CN201159203Y (en) | 2008-05-18 | 2008-05-18 | Low noise axial fan blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201159203Y (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101629756A (en) * | 2009-06-06 | 2010-01-20 | 浙江正理电子电气有限公司 | Air source heat pump water heater with high energy efficiency |
| CN102003413A (en) * | 2010-12-23 | 2011-04-06 | 美的集团有限公司 | Fan blade of ventilation fan |
| CN103835993A (en) * | 2014-02-24 | 2014-06-04 | 广东美的厨房电器制造有限公司 | Fan blade capable of blowing air in diffused mode and fan blade support |
| CN103835992A (en) * | 2014-02-24 | 2014-06-04 | 广东美的厨房电器制造有限公司 | Fan blade capable of blowing air in diffused mode and fan blade support |
| CN106122056A (en) * | 2016-08-24 | 2016-11-16 | 中国船舶电站设备有限公司 | A kind of load box cooling system and special axial flow blower thereof |
| CN106224166A (en) * | 2016-08-29 | 2016-12-14 | 姜志敏 | A kind of temperature difference electricity generation device |
| CN107027317A (en) * | 2015-12-02 | 2017-08-08 | 松下知识产权经营株式会社 | Draught fan impeller |
| CN109139552A (en) * | 2018-11-05 | 2019-01-04 | 威海克莱特菲尔风机股份有限公司 | A kind of airfoil type low noise axial fan blade |
| CN110285091A (en) * | 2019-05-10 | 2019-09-27 | 泛仕达机电股份有限公司 | A kind of fan blade |
| WO2020083002A1 (en) * | 2018-10-24 | 2020-04-30 | 美的集团股份有限公司 | Axial-flow wind turbine, outdoor unit of air conditioner, and air conditioner |
| CN111828351A (en) * | 2019-04-17 | 2020-10-27 | 广东美的环境电器制造有限公司 | Fan |
-
2008
- 2008-05-18 CN CNU2008200222666U patent/CN201159203Y/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101629756A (en) * | 2009-06-06 | 2010-01-20 | 浙江正理电子电气有限公司 | Air source heat pump water heater with high energy efficiency |
| CN102003413A (en) * | 2010-12-23 | 2011-04-06 | 美的集团有限公司 | Fan blade of ventilation fan |
| CN103835993A (en) * | 2014-02-24 | 2014-06-04 | 广东美的厨房电器制造有限公司 | Fan blade capable of blowing air in diffused mode and fan blade support |
| CN103835992A (en) * | 2014-02-24 | 2014-06-04 | 广东美的厨房电器制造有限公司 | Fan blade capable of blowing air in diffused mode and fan blade support |
| CN107027317A (en) * | 2015-12-02 | 2017-08-08 | 松下知识产权经营株式会社 | Draught fan impeller |
| CN106122056A (en) * | 2016-08-24 | 2016-11-16 | 中国船舶电站设备有限公司 | A kind of load box cooling system and special axial flow blower thereof |
| CN106122056B (en) * | 2016-08-24 | 2018-11-27 | 中国船舶电站设备有限公司 | A kind of load box cooling system and its dedicated axial flow blower |
| CN106224166A (en) * | 2016-08-29 | 2016-12-14 | 姜志敏 | A kind of temperature difference electricity generation device |
| WO2020083002A1 (en) * | 2018-10-24 | 2020-04-30 | 美的集团股份有限公司 | Axial-flow wind turbine, outdoor unit of air conditioner, and air conditioner |
| CN109139552A (en) * | 2018-11-05 | 2019-01-04 | 威海克莱特菲尔风机股份有限公司 | A kind of airfoil type low noise axial fan blade |
| CN111828351A (en) * | 2019-04-17 | 2020-10-27 | 广东美的环境电器制造有限公司 | Fan |
| CN110285091A (en) * | 2019-05-10 | 2019-09-27 | 泛仕达机电股份有限公司 | A kind of fan blade |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201159203Y (en) | Low noise axial fan blade | |
| CN201241864Y (en) | Wind impeller for fan | |
| US8142162B2 (en) | Wind turbine blade | |
| CN105715449B (en) | Rotor blade with vortex generators and wind turbine | |
| US9011081B2 (en) | Blade | |
| US20110150664A1 (en) | Aeroacoustic rotor blade for a wind turbine, and wind turbine equipped therewith | |
| US20150132141A1 (en) | Rotor blade of a wind turbine | |
| CN106704261A (en) | Axial flow fan ternary impeller with vein-shaped structure and nonuniform empennage | |
| CN106762840A (en) | Half vane diffuser high and its method for designing of a kind of both sides arrangement | |
| US20120217754A1 (en) | Wind turbine blade, wind turbine generator with the same, and design method of wind turbine blade | |
| CN106762824A (en) | Axial flow blower 3 d impeller with leaf vein texture and sea-gull type splitterr vanes | |
| CN101672298B (en) | Fan blade of cooling fan | |
| CN206816552U (en) | Axial-flow windwheel and air conditioner | |
| US20110211952A1 (en) | Rotor blade for wind turbine | |
| CN206929130U (en) | Axial flow blower 3 d impeller with leaf vein texture and sea-gull type splitterr vanes | |
| CN210484188U (en) | Forward-bending forward-sweeping offset-mounted blade, impeller and axial flow fan with forward-bending forward-sweeping offset-mounted blade | |
| US7854595B2 (en) | Wind turbine blade tip shapes | |
| CN207004919U (en) | Axial flow blower 3 d impeller with leaf vein texture and splitterr vanes | |
| CN102141051B (en) | Centrifugal fan impeller for range hood | |
| CN201963595U (en) | Centrifugal front or rear impeller of non-separated flow subcritical blade profile | |
| CN211501073U (en) | Low-noise impeller | |
| CN207920965U (en) | A kind of axial-flow leaf and its axial flow blower of application | |
| CN203248404U (en) | Improved structure of fan for gasoline blower | |
| CN102072196A (en) | Low-noise fan blade of cooling fan | |
| CN106837867A (en) | Axial flow blower 3 d impeller with leaf vein texture and splitterr vanes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: WEIHAI CREDIT FAN VENTILATOR CO., LTD. Free format text: FORMER OWNER: WEIHAI CREDIT FAIR FAN CO., LTD. Effective date: 20120424 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 264210 WEIHAI, SHANDONG PROVINCE TO: 264200 WEIHAI, SHANDONG PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20120424 Address after: 264200 hi tech Industrial Development Zone, Shandong, Weihai Patentee after: Weihai Credit Fan Ventilator Co., Ltd. Address before: 264210, Weihai, Shandong Province town of Weihai light Phil fan Co., Ltd. Patentee before: Weihai Credit Fair Fan Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081203 Termination date: 20140518 |