CN201991832U - Fan blade of axial flow fan - Google Patents
Fan blade of axial flow fan Download PDFInfo
- Publication number
- CN201991832U CN201991832U CN2011200814976U CN201120081497U CN201991832U CN 201991832 U CN201991832 U CN 201991832U CN 2011200814976 U CN2011200814976 U CN 2011200814976U CN 201120081497 U CN201120081497 U CN 201120081497U CN 201991832 U CN201991832 U CN 201991832U
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- China
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- blade
- axial
- wheel hub
- fan blade
- flow blower
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Abstract
The utility model discloses a fan blade of an axial flow fan, which comprises a wheel hub and 2 to 5 blades arranged at the periphery of the wheel hub, the two side faces of each blade are a pressure surface and a suction surface respectively, the edge part of each blade on the same side as the rotating direction of the blade is a front edge, the edge part of each blade on the opposite side to the rotating direction of the blade is a rear edge, the edge part radial outwards is an outer edge, and two to three reinforcing ribs are arranged in the rotating direction of the blade on the surface of a blade root where each blade is combined with the wheel hub. The axial flow fan adopting the structure can lighten the weight of the blades and lower power consumption and raw material cost under the condition that air quantity is ensured to be consistent.
Description
Technical field
The utility model relates to a kind of blower fan, especially a kind of fan blade of axial-flow blower.
Background technique
The fan blade of axial-flow blower is big because of its flow, pressure head is low, is usually used in the heat exchange of outdoor machine of body-separated air-conditioner fin.The fan blade of axial-flow blower is mainly by wheel hub be located at 2～5 blades that make progress in wheel hub week and constitute, the bi-side of this blade are respectively pressure side and suction surface, the edge of this blade and its sense of rotation same side be leading edge, with the edge of its sense of rotation opposition side be that trailing edge, radially outer edge are outer rim.Flutter when moving in order to reduce blade generally is at present the thick blade rigid that improves of leading edge material by the increase blade, and still, the thick increase of blade material not only can cause the weight of fan blade to increase, and the energy consumption of blower fan is increased, but also can improve the cost of material of fan blade.
Summary of the invention
For the problems referred to above that the fan blade of the axial-flow blower that overcomes prior art exists, the purpose of this utility model is, a kind of low power consumption, the fan blade of axial-flow blower cheaply are provided.
The fan blade of a kind of axial-flow blower that the utility model provides, it comprises wheel hub and is located at 2～5 blades that make progress in wheel hub week, the bi-side of every blade are respectively pressure side and suction surface, the edge of every blade and its sense of rotation same side be leading edge, with the edge of its sense of rotation opposition side be that trailing edge, radially outer edge are outer rim, the surface of the blade root that combines with described wheel hub at every described blade is provided with 2～3 bar shaped stiffening ribs along the blade sense of rotation.
Preferably, the height of described stiffening rib is 1～10mm, and width is 1～5mm, and length is 10～50mm, and the stiffening rib spacing is 3～10mm.
Preferably, described stiffening rib is positioned at the suction surface of described blade.
Preferably, the outer rim of every described blade forms bending part along the bending line that extends to outer rim from trailing edge to its pressure side side or the bending of suction surface side, and this bending part width diametrically becomes big gradually by leading edge to trailing edge.
Preferably, the bending angle of described bending part is 110～130 degree.
Preferably, the head end of described bending line is positioned on the described trailing edge, and tail end is positioned on the described outer rim, and the length of bending line is 1/2～2/3 outer rim length.
Preferably, in the axial orthographic projection view of fan blade, the profile line of every described blade outer rim is a curve, the outer contour of described wheel hub is circle O1, described curve comprises first section, stage casing and rear, and the stage casing of the profile line of all blade outer rims all is positioned on the round O2, and this circle O2 and described round O1 are concentric circle.
Preferably, described wheel hub is tubular, and it comprises body and be located at this body and the plush copper of an end of described suction surface homonymy that the external diameter of this plush copper is provided with the step that matches with plush copper less than the external diameter of body in body internal surface.
Preferably, the junction from this blade and described wheel hub is provided with the thickening part along the leading edge length direction on the leading edge of every described blade.
Preferably, described wheel hub and described blade are one-body molded.
Compared with prior art, the utility model has the advantages that:
(1) axial-flow leaf that provides of the utility model, the surface of the blade root that combines with wheel hub at its blade is provided with the bar shaped stiffening rib, can alleviate leaf weight, in the situation decline low power consumption and the cost of raw material that guarantee the air quantity unanimity;
(2) axial-flow leaf that provides of the utility model is provided with the thickening part at its blade inlet edge, and this thickening part can adapt to the big air-flow angle of attack, and helps improving the intensity of blade, improves two-dimentional flutter phenomenon;
(3) axial-flow leaf that provides of the utility model, its blade outer rim is provided with bending part, and it is poor to reduce blade and blade tip pressure at both sides, suppresses the leakage eddy current of blade excircle, can effectively reduce the impact loss of air inlet, thereby reaches the purpose that promotes wind wheel efficient; Simultaneously, when impeller operation, because the air-flow angle of attack is less, the shock-free cutting steam of blade inlet edge will produce lower pressure disturbance, plays tangible effect to reducing noise;
(4) axial-flow leaf that provides of the utility model, the stage casing of the profile line of its blade outer rim and the outer contour of wheel hub are isocentric circular arc, the high speed operation district of the blade of this kind structure is more coherent, can reduce the noise of the lift pulsation generation that is caused by coming off of trailing edge whirlpool;
(5) axial-flow leaf that provides of the utility model, the wheel hub of two fan blades can insert mutually, convenient storage and transportation.
Description of drawings
Fig. 1 is the utility model embodiment 1 a stereogram;
Fig. 2 is axial orthographic projection view of the utility model embodiment 1;
Fig. 3 is the A-A sectional view of Fig. 2;
Fig. 4 is the partial discharge view at I place among Fig. 3;
Fig. 5 is the utility model embodiment 2 a partial view.
Description of reference numerals: 1-wheel hub, 11-plush copper, 12-body, 12a-step, 2-blade, 21-leading edge, 22-trailing edge, 23-outer rim, 24-bending part, 24a-bending line, 25-thickening part, 26-stiffening rib, 27-blade root, 28-pressure side, 29-suction surface.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated.
As shown in Figure 1, the axial-flow leaf of present embodiment is by wheel hub 1 be distributed on 3 blades 2 that make progress in 1 week of wheel hub and form blade 2 and wheel hub 1 employing integrated injection molding.The bi-side of blade 2 are respectively pressure side 28 and suction surface 29, the edge of this blade 2 and its sense of rotation same side be leading edge 21, with the edge of its sense of rotation opposition side be that trailing edge 22, radially outer edge are outer rim 23.The suction surface 29 of the blade root 27 that combines with wheel hub 1 at every blade 2 is provided with 2 bar shaped stiffening ribs 26 along blade 2 sense of rotation.Preferably, the height of stiffening rib 26 is 1～10mm, and width is 1～5mm, and length is 10～50mm, and stiffening rib 26 spacings are 3～10mm.Stiffening rib 26 can alleviate blade 2 weight, in the situation decline low power consumption and the cost of raw material that guarantee the air quantity unanimity.
Further referring to Fig. 1, the outer rim 23 of every blade 2 forms bending part 24 along the bending line 24a that extends to outer rim 23 from trailing edge 22 to its suction surface 29 side bendings, and this bending part 24 width diametrically becomes big gradually by leading edge 21 to trailing edge 22.Preferably, the bending angle of bending part 24 is 110～130 degree.The head end of bending line 24a is positioned on the trailing edge 22, and tail end is positioned on the outer rim 23, and the length of bending line 24a is 1/2～2/3 outer rim 23 length.Blade adopts this structure, and it is poor to reduce blade and blade tip pressure at both sides, suppresses the leakage eddy current of blade excircle, can effectively reduce the impact loss of air inlet, thereby reaches the purpose that promotes wind wheel efficient; Simultaneously, when impeller operation, because the air-flow angle of attack is less, the shock-free cutting steam of blade inlet edge will produce lower pressure disturbance, plays tangible effect to reducing noise.
Figure 2 shows that the axial orthographic projection view of the axial-flow leaf of present embodiment, as can be seen from this figure, the profile line of every blade 2 outer rims 23 is a curve, and the outer contour of wheel hub 1 is circle O1.Described curve comprises first section A1, stage casing A2 and rear A3, and the stage casing A2 of the profile line of all blade 2 outer rims 23 all is positioned on the round O2, and this circle O2 and described round O1 are concentric circle.Blade adopts this structure, and blade high speed operation district is more coherent, can reduce the noise of the lift pulsation generation that is caused by coming off of trailing edge whirlpool.
Further referring to Fig. 2, the junction from this blade 2 and wheel hub 1 on the leading edge 21 of every blade 2 is provided with thickening part 25 along leading edge 21 length directions.Preferably, thickening part 25 is 1/4～1/2 leading edge, 21 length along the length of leading edge 21 length directions.This thickening part 25 can adapt to the big air-flow angle of attack, and helps improving the intensity of blade 2, improves two-dimentional flutter phenomenon.
Referring to Fig. 3,4, wheel hub 1 is a tubular structure, it comprises body 12 and is located at the plush copper 11 of an end of this body 12 and described suction surface 29 homonymies that the external diameter of this plush copper 11 is provided with the step 12a that matches with plush copper 11 less than the external diameter of body 12 at body 12 internal surfaces.Wheel hub adopts this structure, and the wheel hub of adjacent two fan blades can insert mutually, convenient storage and transportation.
As shown in Figure 5, as different from Example 1, the suction surface 29 of the blade root 27 that combines with wheel hub 1 at every blade 2 is provided with 3 bar shaped stiffening ribs 26 along blade 2 sense of rotation.
Only be specific embodiment of the utility model below, do not limit protection domain of the present utility model with this; Any replacement and the improvement done on the basis of not violating the utility model design all belong to protection domain of the present utility model.
Claims (10)
1. the fan blade of an axial-flow blower, it comprises wheel hub and is located at 2～5 blades that make progress in wheel hub week, the bi-side of every blade are respectively pressure side and suction surface, the edge of every blade and its sense of rotation same side be leading edge, with the edge of its sense of rotation opposition side be that trailing edge, radially outer edge are outer rim, it is characterized in that: the surface of the blade root that combines with described wheel hub at every described blade is provided with 2～3 bar shaped stiffening ribs along the blade sense of rotation.
2. the fan blade of axial-flow blower according to claim 1, it is characterized in that: the height of described stiffening rib is 1～10mm, and width is 1～5mm, and length is 10～50mm, and the stiffening rib spacing is 3～10mm.
3. the fan blade of axial-flow blower according to claim 1, it is characterized in that: described stiffening rib is positioned at the suction surface of described blade.
4. according to the fan blade of each described axial-flow blower of claim 1 to 3, it is characterized in that: the outer rim of every described blade forms bending part along the bending line that extends to outer rim from trailing edge to its pressure side side or the bending of suction surface side, and this bending part width diametrically becomes big gradually by leading edge to trailing edge.
5. the fan blade of axial-flow blower according to claim 4 is characterized in that: the bending angle of described bending part is 110～130 degree.
6. the fan blade of axial-flow blower according to claim 4, it is characterized in that: the head end of described bending line is positioned on the described trailing edge, and tail end is positioned on the described outer rim, and the length of bending line is 1/2～2/3 outer rim length.
7. according to the fan blade of each described axial-flow blower of claim 1 to 3, it is characterized in that: in the axial orthographic projection view of fan blade, the profile line of every described blade outer rim is a curve, the outer contour of described wheel hub is circle O1, described curve comprises first section, stage casing and rear, and the stage casing of the profile line of all blade outer rims all is positioned on the round O2, and this circle O2 and described round O1 are concentric circle.
8. according to the fan blade of each described axial-flow blower of claim 1 to 3, it is characterized in that: described wheel hub is tubular, it comprises body and is located at this body and the plush copper of an end of described suction surface homonymy, the external diameter of this plush copper is provided with the step that matches with plush copper less than the external diameter of body in body internal surface.
9. according to the fan blade of each described axial-flow blower of claim 1 to 3, it is characterized in that: the junction from this blade and described wheel hub on the leading edge of every described blade is provided with the thickening part along the leading edge length direction.
10. according to the fan blade of each described axial-flow blower of claim 1 to 3, it is characterized in that: described wheel hub and described blade are one-body molded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200814976U CN201991832U (en) | 2011-03-25 | 2011-03-25 | Fan blade of axial flow fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200814976U CN201991832U (en) | 2011-03-25 | 2011-03-25 | Fan blade of axial flow fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201991832U true CN201991832U (en) | 2011-09-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200814976U Expired - Lifetime CN201991832U (en) | 2011-03-25 | 2011-03-25 | Fan blade of axial flow fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201991832U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103122872A (en) * | 2011-11-21 | 2013-05-29 | 珠海格力电器股份有限公司 | Axial flow fan |
| CN103573703A (en) * | 2012-07-31 | 2014-02-12 | 珠海格力电器股份有限公司 | Axle-flow fan blade |
| CN107269584A (en) * | 2017-07-26 | 2017-10-20 | 奥克斯空调股份有限公司 | The enhanced axial-flow leaf of structure |
| CN107313978A (en) * | 2017-07-26 | 2017-11-03 | 奥克斯空调股份有限公司 | Lightweight low-load axial-flow leaf |
| CN109891101A (en) * | 2016-10-27 | 2019-06-14 | 三菱电机株式会社 | Propeller fan, outdoor unit and refrigerating circulatory device |
-
2011
- 2011-03-25 CN CN2011200814976U patent/CN201991832U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103122872A (en) * | 2011-11-21 | 2013-05-29 | 珠海格力电器股份有限公司 | Axial flow fan |
| CN103122872B (en) * | 2011-11-21 | 2016-02-10 | 珠海格力电器股份有限公司 | Axial fan |
| CN103573703A (en) * | 2012-07-31 | 2014-02-12 | 珠海格力电器股份有限公司 | Axle-flow fan blade |
| CN103573703B (en) * | 2012-07-31 | 2016-03-09 | 珠海格力电器股份有限公司 | Axial-flow leaf |
| CN109891101A (en) * | 2016-10-27 | 2019-06-14 | 三菱电机株式会社 | Propeller fan, outdoor unit and refrigerating circulatory device |
| CN109891101B (en) * | 2016-10-27 | 2020-09-18 | 三菱电机株式会社 | Propeller fan, outdoor unit, and refrigeration cycle device |
| CN107269584A (en) * | 2017-07-26 | 2017-10-20 | 奥克斯空调股份有限公司 | The enhanced axial-flow leaf of structure |
| CN107313978A (en) * | 2017-07-26 | 2017-11-03 | 奥克斯空调股份有限公司 | Lightweight low-load axial-flow leaf |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110928 |
|
| CX01 | Expiry of patent term |