CN102644623A - Axial-flow wind wheel - Google Patents
Axial-flow wind wheel Download PDFInfo
- Publication number
- CN102644623A CN102644623A CN2012101105124A CN201210110512A CN102644623A CN 102644623 A CN102644623 A CN 102644623A CN 2012101105124 A CN2012101105124 A CN 2012101105124A CN 201210110512 A CN201210110512 A CN 201210110512A CN 102644623 A CN102644623 A CN 102644623A
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- China
- Prior art keywords
- wind wheel
- axial
- trailing edge
- hole
- district
- 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.)
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Classifications
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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
- F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
- F04D29/681—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps
- F04D29/682—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps by fluid extraction
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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
- F04D29/38—Blades
- F04D29/384—Blades characterised by form
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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
- F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
- F04D29/681—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps
- F04D29/684—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps by fluid injection
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/20—Rotors
- F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
- F05D2240/304—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor related to the trailing edge of a rotor blade
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
Abstract
The invention relates to an axial-flow wind wheel comprising a hub which is connected with a motor and a plurality of wind wheel blades which are arranged around the hub; each wind wheel blade comprises a wind wheel front edge on a wind inlet side and a wind wheel tail edge on a wind outlet side; and the axial-flow wind wheel is characterized in that through holes are arranged in a wind wheel tail edge area. According to the axial-flow wind wheel, due to the arrangement of through holes in the wind wheel tail edge area, when the wind wheel rotates, as the pressures of a pressure surface and a suction surface of the wind wheel are different, some fluid in a border layer of the pressure surface of the wind wheel passes through the through holes and flows to the tail edge area of the suction surface, the separation of the border layer of the suction surface is delayed, the actual work area of the wind wheel is increased, so that the working efficiency of the wind wheel is effectively improved; and simultaneously, the production and the fall-off of turbulent vortex in the separation area of the border layer of the suction surface are suppressed and damaged, so that the turbulence intensity and the turbulence noise of the border layer are reduced.
Description
Technical field
The present invention relates to axial-flow windwheel, particularly a kind of through inhibition wind wheel trailing edge TURBULENT BOUNDARY LAYER SEPARATION, reach the work area that improves wind wheel blade, and can reduce turbulence intensity and the axial-flow windwheel that reduces turbulence noise.
Background technique
Usually, axial-flow windwheel is a kind of through the motor driving rotation, drives the axially device of air-supply of gas.Axial-flow windwheel is not only applicable to household appliances such as air-conditioning, electric fan, refrigerator, is widely used for industrial fields such as computer, Aero-Space, boats and ships simultaneously yet.
The existing technology of axial-flow windwheel is described below in conjunction with accompanying drawing 1 and Fig. 2.
As shown in the figure, existing axial-flow windwheel 1 comprises wheel hub 11 and several wind wheel blades 12 that are provided with around wheel hub.Fluid walk around wind wheel blade 12 characteristics determined the performance of whole axial-flow windwheel.The outlet air surface of wind wheel blade 12 is a pressure side 20, and the air draught face of wind wheel blade 12 is a suction surface 21.Wind wheel blade 12 is leaf top 26 along the radial direction outer most edge, and leaf top 26 connects the leading edge 27 of wind wheel blade inlet side and the trailing edge 28 of air side.
Existing axial-flow windwheel is in rotary course; Through 20 pairs of gas actings of pressure side, make it to obtain kinetic energy and flow out the wind wheel front portion, simultaneously under the action of pressure of pressure side 20 and suction surface 21; The air of axial-flow windwheel rear side is side flow forward, thereby realizes the axially function of air-supply.
But the axial-flow windwheel of above-mentioned technology has following deficiency.
Fig. 3 walks around the cross sectional representation of wind wheel blade 12 for air-flow.When air-flow is flowed through wind wheel blade 12 with certain angle of attack; Owing to there is contrary pressure gradient; Air-flow can begin to produce boundary layer separation near the zone 29 of wind wheel trailing edge 28 at suction surface 21, thereby has reduced the actual acting area of wind wheel blade 12, has reduced the working efficiency of wind wheel; Simultaneously, air-flow forms the turbulent eddy 30 of various yardsticks in the separation zone, and constantly comes off from wind wheel trailing edge 28 and to form the wake flow vortex street that comes off, and has so not only strengthened turbulence intensity, can produce the turbulence noise of wideband simultaneously.
Summary of the invention
In order to overcome the above problems; The objective of the invention is through improving the structure characteristic in wind wheel trailing edge TURBULENT BOUNDARY LAYER SEPARATION district; Postpone the separation of wind wheel suction surface trailing edge district turbulent boundary layer, suppress the generation of turbulent flow whirlpool and come off, provide a kind of high efficiency low noise axial-flow windwheel.
In order to reach above purpose; The present invention provides a kind of axial-flow windwheel with following structure: comprise wheel hub that links to each other with motor and several wind wheel blades that are provided with around wheel hub; Said wind wheel blade comprises the wind wheel leading edge of inlet side and the wind wheel trailing edge of air side; It is characterized in that the district is provided with through hole at said wind wheel trailing edge.
The number of through-holes in above-mentioned wind wheel trailing edge district can be one or more.
The through hole in above-mentioned wind wheel trailing edge district be shaped as circular or oval-shaped clear opening or oblique through hole, or square or polygon direct through groove or oblique groove, or the combination in various difformities hole.
The pore diameter range of the through hole in above-mentioned wind wheel trailing edge district is 0.1mm-300mm.
The distributing position of the through hole in above-mentioned wind wheel trailing edge district is that rule distributes or random distribution.
The distributed areas of the through hole in above-mentioned wind wheel trailing edge district are that its circumferential scope is a 0-1/2 times of wind wheel blade circumferential cross-section chord length near wind wheel trailing edge zone, and its radial extension is a 0-1 times of wind wheel blade radius.
Number, shape and the position of above-mentioned all wind wheel trailing edge district through holes can determine according to size, shape, operating conditions and the working environment of wind wheel jointly.
The invention has the beneficial effects as follows; The district is provided with through hole at the wind wheel trailing edge, and wind wheel is in rotary course, because there are pressure difference in wind wheel pressure side and suction surface; Therefore the segment fluid flow in the wind wheel pressure side boundary layer flows to suction surface trailing edge district through through hole; Thereby postpone the separation in suction surface boundary layer, increase the actual acting area of wind wheel, improved the working efficiency of wind wheel effectively; Suppress simultaneously and destroy the generation of turbulent eddy in the suction surface boundary layer separation district and come off, thereby reduce boundary layer turbulence intensity and turbulence noise.
Description of drawings
Fig. 1 is the structure front view of existing axial-flow windwheel;
Fig. 2 is the structure side view of existing axial-flow windwheel;
Fig. 3 walks around the wind wheel blade cross sectional representation for air-flow in the existing axial-flow windwheel;
Fig. 4 is the structure front view of the embodiment of the invention 1;
Fig. 5 is the structure side view of the embodiment of the invention 1;
Fig. 6 is the structure front view of the embodiment of the invention 2;
Fig. 7 is the structure front view of the embodiment of the invention 3.
Critical piece description of reference numerals of the present invention:
101: wheel hub, 102: wind wheel blade, 120: pressure side, 121: suction surface, 126: leaf top, 127: leading edge, 128: trailing edge, 200: through hole.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Embodiment 1:
Like Fig. 4 and shown in Figure 5, present embodiment comprises wheel hub 101 and three wind wheel blades 102 that are provided with around wheel hub 101; The outlet air surface of wind wheel blade 102 is a pressure side 120, and the air draught face of wind wheel blade 102 is a suction surface 121; Wind wheel blade 102 is leaf top 126 along the radial direction outer most edge, and leaf top 126 connects the leading edge 127 of wind wheel blade 102 inlet sides and the trailing edge 128 of air side.Wind wheel trailing edge 128 zones are provided with a plurality of through holes 200.Through hole 200 be shaped as circular or non-circular clear opening or oblique through hole.The distributing position of through hole 200 is arranged by the rule rule in length and breadth; The pore diameter range of through hole 200 is 0.1mm-300mm; All through hole 200 integral body are near wind wheel trailing edge 128 zones, and its circumferential scope is 0-1/2 times of wind wheel blade 102 circumferential cross-section chord lengths, and its radial extension is 0-1 times of wind wheel blade 102 radiuses.
Prove through CFD fluid analysis and experiment test: several through holes of design in wind wheel trailing edge district; Segment fluid flow in the wind wheel pressure side boundary layer flows to suction surface trailing edge district through through hole under action of pressure; Postpone the separation in suction surface boundary layer; Increase the actual acting area of wind wheel, improved the working efficiency of wind wheel effectively; Suppress simultaneously and destroy the generation of turbulent eddy in the suction surface boundary layer separation district and come off, thereby reduce boundary layer turbulence noise.
Embodiment 2: as shown in Figure 6, and several through holes 200 of trailing edge district design of wind wheel blade 102.The circumferential size of through hole 200 increases to the wind wheel outer rim from the wind wheel center gradually.Through hole 200 other structural characteristics of not stating are with embodiment 1.Its effect is: wind wheel is in rotary course; The linear velocity that fluid is walked around the wind wheel circumferential cross-section increases to the wind wheel outer rim from the wind wheel center gradually, and the boundary layer separation district of wind wheel suction surface trailing edge also increases gradually, therefore designs the through hole mode of present embodiment; The segment fluid flow that not only helps in the wind wheel pressure side boundary layer flows to suction surface trailing edge district through through hole under action of pressure; Postpone the separation in suction surface boundary layer, increase the actual acting area of wind wheel, improve the working efficiency of wind wheel; Can reduce simultaneously fluid and be drawn into suction surface and the flow loss that produces, guarantee the complete machine air quantity from pressure side.
Embodiment 3: as shown in Figure 7, and 1 through hole 200 of trailing edge district design of wind wheel blade 102.Through hole 200 is positioned at the trailing edge of wind wheel blade 102 near the wind wheel outer edge area.Through hole 200 other structural characteristics of not stating are with embodiment 1.Its effect is: wind wheel is in rotary course, and it is relatively large in the wind wheel outer rim that fluid is walked around the linear velocity of wind wheel circumferential cross-section, and the boundary layer separation of wind wheel suction surface trailing edge is also comparatively obvious near the wind wheel outer rim; Therefore design the through hole mode of present embodiment; The boundary layer separation that not only can effectively suppress wind wheel suction surface trailing edge, the actual acting area of increase wind wheel, the working efficiency of raising wind wheel; Single through hole mode preparation process is simple simultaneously, and the intensity at wind wheel trailing edge place is also better.
Claims (6)
1. axial-flow windwheel; Comprise wheel hub (101) that links to each other with motor and several wind wheel blades (102) that are provided with around wheel hub (101); Said wind wheel blade (102) comprises the wind wheel leading edge (127) of inlet side and the wind wheel trailing edge (128) of air side; It is characterized in that the district is provided with through hole (200) at said wind wheel trailing edge (128).
2. axial-flow windwheel according to claim 1 is characterized in that, through hole (200) number in said wind wheel trailing edge (128) district is one or more.
3. axial-flow windwheel according to claim 1 and 2 is characterized in that, the through hole (200) in said wind wheel trailing edge (128) district be shaped as circular or oval-shaped clear opening or oblique through hole; Or square or polygon direct through groove or oblique groove, or the combination in various difformities hole.
4. axial-flow windwheel according to claim 3 is characterized in that, the pore diameter range of the through hole (200) in said wind wheel trailing edge (128) district is 0.1mm-300mm.
5. axial-flow windwheel according to claim 1 is characterized in that, the distributing position of the through hole (200) in said wind wheel trailing edge (128) district is that rule distributes or random distribution.
6. axial-flow windwheel according to claim 1; It is characterized in that; The distributed areas of the through hole (200) in said wind wheel trailing edge (128) district are near wind wheel trailing edge (128) zone; Its circumferential scope is 0-1/2 times of wind wheel blade (a 102) circumferential cross-section chord length, and its radial extension is 0-1 times of wind wheel blade (a 102) radius.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101105124A CN102644623A (en) | 2012-04-16 | 2012-04-16 | Axial-flow wind wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101105124A CN102644623A (en) | 2012-04-16 | 2012-04-16 | Axial-flow wind wheel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102644623A true CN102644623A (en) | 2012-08-22 |
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ID=46657653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101105124A Pending CN102644623A (en) | 2012-04-16 | 2012-04-16 | Axial-flow wind wheel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102644623A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454641A (en) * | 2014-11-13 | 2015-03-25 | 中国北车集团大连机车研究所有限公司 | Low-noise axial flow fan impeller for high-speed electric multiple unit cooling system |
| CN106762825A (en) * | 2016-12-07 | 2017-05-31 | 浙江理工大学 | Axial flow blower 3 d impeller with leaf vein texture and circular arc post splitterr vanes |
| CN107313979A (en) * | 2017-08-31 | 2017-11-03 | 广东美的制冷设备有限公司 | Axial-flow windwheel and the air conditioner with it |
| CN107489658A (en) * | 2017-08-31 | 2017-12-19 | 中国航天空气动力技术研究院 | Electric fan noise-reduction method and improved blade of electric fan structure based on blade remodeling |
| CN110410880A (en) * | 2019-08-29 | 2019-11-05 | 代元军 | A kind of trailing edge is in the air-conditioner outdoor unit of microcellular structure |
| CN111043078A (en) * | 2019-12-31 | 2020-04-21 | 宁波奥克斯电气股份有限公司 | Axial flow fan blade and air conditioner |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4214753A1 (en) * | 1992-05-04 | 1993-11-11 | Asea Brown Boveri | Radial compressor impeller with axially spaced shroud disc - has series of holes across blade ends to give stable flow under part load conditions |
| CN201037475Y (en) * | 2007-05-08 | 2008-03-19 | 金家宝工业有限公司 | Fan blade structure |
| CN101440822A (en) * | 2008-11-28 | 2009-05-27 | 中山大洋电机股份有限公司 | Axial-flow fan and fan blade of centrifugal fan |
| CN201436402U (en) * | 2009-06-08 | 2010-04-07 | 珠海格力电器股份有限公司 | Propeller fan |
| CN201874886U (en) * | 2010-10-26 | 2011-06-22 | 珠海格力电器股份有限公司 | Axial flow fan blade |
-
2012
- 2012-04-16 CN CN2012101105124A patent/CN102644623A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4214753A1 (en) * | 1992-05-04 | 1993-11-11 | Asea Brown Boveri | Radial compressor impeller with axially spaced shroud disc - has series of holes across blade ends to give stable flow under part load conditions |
| CN201037475Y (en) * | 2007-05-08 | 2008-03-19 | 金家宝工业有限公司 | Fan blade structure |
| CN101440822A (en) * | 2008-11-28 | 2009-05-27 | 中山大洋电机股份有限公司 | Axial-flow fan and fan blade of centrifugal fan |
| CN201436402U (en) * | 2009-06-08 | 2010-04-07 | 珠海格力电器股份有限公司 | Propeller fan |
| CN201874886U (en) * | 2010-10-26 | 2011-06-22 | 珠海格力电器股份有限公司 | Axial flow fan blade |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454641A (en) * | 2014-11-13 | 2015-03-25 | 中国北车集团大连机车研究所有限公司 | Low-noise axial flow fan impeller for high-speed electric multiple unit cooling system |
| CN106762825A (en) * | 2016-12-07 | 2017-05-31 | 浙江理工大学 | Axial flow blower 3 d impeller with leaf vein texture and circular arc post splitterr vanes |
| CN106762825B (en) * | 2016-12-07 | 2023-05-09 | 浙江理工大学 | Axial flow fan ternary impeller with vein structure and circular arc column splitter blade |
| CN107313979A (en) * | 2017-08-31 | 2017-11-03 | 广东美的制冷设备有限公司 | Axial-flow windwheel and the air conditioner with it |
| CN107489658A (en) * | 2017-08-31 | 2017-12-19 | 中国航天空气动力技术研究院 | Electric fan noise-reduction method and improved blade of electric fan structure based on blade remodeling |
| CN107313979B (en) * | 2017-08-31 | 2019-04-30 | 广东美的制冷设备有限公司 | Axial-flow windwheel and air conditioner with it |
| CN110410880A (en) * | 2019-08-29 | 2019-11-05 | 代元军 | A kind of trailing edge is in the air-conditioner outdoor unit of microcellular structure |
| CN111043078A (en) * | 2019-12-31 | 2020-04-21 | 宁波奥克斯电气股份有限公司 | Axial flow fan blade and air conditioner |
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| PB01 | Publication | ||
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Application publication date: 20120822 |