CN103161759B - Axial flow fan blade - Google Patents
Axial flow fan blade Download PDFInfo
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- CN103161759B CN103161759B CN201110410948.0A CN201110410948A CN103161759B CN 103161759 B CN103161759 B CN 103161759B CN 201110410948 A CN201110410948 A CN 201110410948A CN 103161759 B CN103161759 B CN 103161759B
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- 238000000465 moulding Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000008859 change Effects 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 238000004378 air conditioning Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
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Abstract
The invention provides an axial flow fan blade which comprises a hub and a plurality of blades arranged on the periphery of the hub, wherein an arc line of a radial section projection of each blade is formed by three sections of continuous curves, the three sections of continuous curves are a first section of curve positioned at the innermost side, a second section of curve positioned in the middle and a third section of curve positioned at the outermost side respectively, the first section of curve and the third section of curve are bent towards a suction surface, and the second section of curve is bent towards a pressure surface. The blades of the axial flow fan blade provided by the invention change along the chord line of the radial projection surface with a certain rule, so that the production cost and the installation space can be saved and the power consumption can be reduced on the premise of ensuring the air quantity and the noise of the fan.
Description
Technical field
The present invention relates to air-conditioning technical field, especially, relate to a kind of axial-flow leaf.
Background technique
Axial-flow leaf is fixed on air conditioner room outdoor air channel by the axis hole in the middle of wheel hub with coordinating of motor shaft, and the quality of its design is the main determining factor of outdoor unit air channel quality.
Existing air-conditioning products is tending towards lightening, makes air flue structure compacter, and the installing space of blower fan diminishes, but what bring is the deterioration of noise thereupon, and this has higher requirement to the isostructural design of the aerofoil profile of axial-flow leaf.
Summary of the invention
The object of the invention is to provide a kind of axial-flow leaf, cannot adapt to the aerofoil profile solving existing axial-flow leaf the technical problem that air-conditioning is lightening, assembling space diminishes.
For achieving the above object, the invention provides a kind of axial-flow leaf, comprise wheel hub and be arranged on multiple blades of periphery of wheel hub, the camber line of blade section projection is radially formed by three sections of continous curves, three sections of continous curves be respectively be positioned at inner side first paragraph curve, be positioned at middle second segment curve and be positioned at outermost 3rd section of curve, wherein, first paragraph curve and the 3rd section of curve bend to suction surface, and second segment curve bends to pressure side.
Further, first paragraph curve is bent to the position of the first botanical origin radius from the outward edge of wheel hub to suction surface; Second segment curve is bent to the position of the second botanical origin radius from the position of the first botanical origin radius to pressure side; 3rd section of curve is bent to the position of the 3rd botanical origin radius from the position of the second botanical origin radius to suction surface, wherein, the starting point of the first botanical origin radius, the second botanical origin radius and the 3rd botanical origin radius is the center of wheel hub.
Further, the position of the first botanical origin radius or the position of the 3rd primitive radius be continous curve along axial-flow leaf central axis from pressure facing to the peak on the direction of suction surface.
Further, the position of the first botanical origin radius and the position of the 3rd primitive radius be continous curve along axial-flow leaf central axis from pressure facing to the peak on the direction of suction surface.
Further, the outward edge of wheel hub or the position of the second botanical origin radius be continous curve along axial-flow leaf central axis from pressure facing to the minimum point on the direction of suction surface.
Further, the outward edge of wheel hub and the position of the second botanical origin radius be continous curve along axial-flow leaf central axis from pressure facing to the minimum point on the direction of suction surface.
Further, the span of the first botanical origin radius is as follows: 1.05Rh≤R1≤0.9R3, and wherein, Rh represents the radius of wheel hub, and R1 represents the first botanical origin radius, and R3 represents the 3rd botanical origin radius.
Further, the span of the second botanical origin radius is as follows: 1.05R1≤R2≤0.98R3, and wherein, R1 represents the first botanical origin radius, and R2 represents the second botanical origin radius, and R3 represents the 3rd botanical origin radius.
Further, first paragraph curve, second segment curve and the 3rd section of curve are all the matched curve by equation of higher order matching.
Further, one or more snippets in three sections of continous curves is wave molding.
The present invention has following beneficial effect:
The camber line of the blade section projection radially of axial-flow leaf provided by the invention is formed by three sections of continous curves, and wherein, first paragraph curve and the 3rd section of curve bend to suction surface, and second segment curve bends to pressure side.The string of a musical instrument on the blade of axial-flow leaf provided by the invention radially projection plane, with the change of certain rule, under the precondition ensureing fan delivery and noise, can save production cost and installing space, reduces power consumption.
Except object described above, feature and advantage, the present invention also has other object, feature and advantage.Below with reference to figure, the present invention is further detailed explanation.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the Facad structure schematic diagram of the axial-flow leaf of the preferred embodiment of the present invention;
Fig. 2 is the side-looking structural representation of the axial-flow leaf in A-A direction in Fig. 1;
Fig. 3 is the position view of the hub radius of the preferred embodiment of the present invention and each botanical origin radius of blade;
Fig. 4 is the composition structural representation in the S face in Fig. 2;
Fig. 5 be S face in Fig. 2 at the matched curve schematic diagram of rectangular coordinate system taking radius as abscissa;
Fig. 6 is first paragraph curve is undulatory blade profile schematic diagram;
Fig. 7 is second segment curve is undulatory blade profile schematic diagram;
Fig. 8 is the 3rd section of curve is undulatory blade profile schematic diagram;
Fig. 9 is three sections of curves is all undulatory blade profile schematic diagram; And
Figure 10 is the contrast schematic diagram of the sectional shape of axial-flow leaf of the prior art and the sectional shape of axial-flow leaf provided by the invention.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
As depicted in figs. 1 and 2, the invention provides a kind of axial-flow leaf, comprise wheel hub 10 and be arranged on multiple blades 30 of periphery of wheel hub 10, the camber line of each blade 30 section projection is radially formed by three sections of continous curves, three sections of continous curves be respectively be positioned at inner side first paragraph curve S 1, be positioned at middle second segment curve S 2 and be positioned at outermost 3rd section of curve S 3, wherein, described first paragraph curve S 1 and described 3rd section of curve S 3 bend to suction surface C, and second segment curve S 2 bends to pressure side D.As can be seen from the figure, first paragraph curve S 1 and the 3rd section of curve S 3 convexly bend to suction surface C, and second segment curve S 2 convexly bends to pressure side D.The shape of each blade 30 may not be all identical, but in order to ensure dynamic balancing, the shape of symmetrical blade should be identical.Each blade 30 take rotating center as axle center, equally or unequal-interval distribution.
As shown in Figure 3 and Figure 4, specifically, first paragraph curve S 1 is bent to the position of the first botanical origin radius R 1 from the outward edge of wheel hub 10 to suction surface; Second segment curve S 2 is bent to the position of the second botanical origin radius R 2 from the position of the first botanical origin radius R 1 to pressure side; 3rd section of curve R3 is bent to the position of the 3rd botanical origin radius R 3 from the position of the second botanical origin radius R 2 to suction surface, wherein, the starting point of the first botanical origin radius R 1, second botanical origin radius R 2 and the 3rd botanical origin radius R 3 is the center of wheel hub 10.
In fact, the position of the first botanical origin radius R 1 or the position of the 3rd primitive radius R 3 be continous curve along axial-flow leaf central axis from pressure side D towards the direction of suction surface C on peak, can both be also the peak of continous curve simultaneously.
Correspondingly, the outward edge of wheel hub 10 or the position of the second botanical origin radius R 2 are the minimum point of continous curve, also can both be simultaneously continous curve along axial-flow leaf central axis from pressure side D towards minimum point on the direction of suction surface C.
The span of the first botanical origin radius R 1 is as follows:
1.05Rh≤R1≤0.98R3, wherein, Rh represents the radius of wheel hub, and R1 represents the first botanical origin radius, and R3 represents the 3rd botanical origin radius.
The span of the second botanical origin radius R 2 is as follows:
1.05R1≤R2≤0.98R3, wherein, R1 represents the first botanical origin radius, and R2 represents the second botanical origin radius, and R3 represents the 3rd botanical origin radius.
First curve, the second curve and the 3rd curve are all the matched curve by equation of higher order matching.
As shown in Figure 5, the curvilinear structures in blade 30 radially cross section is arranged in plane coordinate system, the initial point of system of coordinates is the radial cross section upper blade 30 of blade 30 and the outer peripheral point of contact of wheel hub 10, x-axis is the direction extended along the outward edge of this wheel hub 10 to the outward edge of blade 30, and x value represents the cross section drop shadow curve extended length in the direction in which of cross section upper blade 30; Y-axis is the coordinate axes parallel with the running shaft of blade 30.
Under this rectangular coordinate system, three sections of curves in blade 30 radially cross section can be represented by following formula respectively:
The fitting formula of first paragraph curve S 1: y=-0.0019x
2+ 0.289x-0.1181,
The fitting formula of second segment curve S 2: y=6 × 10
-8x
4+ 2 × 10
-5x
3-0.0077x
2+ 0.668x-6.8706,
The fitting formula of the 3rd section of curve S 3: y=0.0027x
2-0.6468x+39.023;
Each section of curve is all the n equation of n th order n about x, and this equation can have multiple.
Such as,
First paragraph curve S 1 also can fit to y=-3 × 10
-5x
3+ 6 × 10
-4x
2the cubic curve of+0.235+0.049,
Second segment curve S 2 also can fit to
Y=-8 × 10
-12x
6+ 5 × 10
-9x
5-1 × 10
-6x
4+ 2 × 10
-4x
3-0.0192x
2the sextic of-13.271,
3rd section of curve S 3 also can fit to y=1 × 10
-5x
3-2.5 × 10
-3x
2the cubic curve of+0.1366x;
As long as each section of curve meets Changing Pattern as described above, the air current flow of suction surface C and pressure side D can be improved, reduce vortex shedding, reduce cost of production.
As shown in Figures 6 to 9, any one end in three sections of continous curves or three sections can be wave molding.
As shown in Figure 10, the radial cross-sectional shape of the blade 30 of axial-flow leaf provided by the invention is different from Figure 10 other aerofoil profiles being numbered 1,2, compared with other aerofoil profiles, this vane airfoil profile provided by the invention can when both ensureing air quantity, power consumption can be reduced again, improve the air current flow of suction surface and pressure side, reduce because pressure reduction reason causes air-flow reflux at fan blade outer rim place and produce vortex shedding, improve air turbulence phenomenon, thus reduction noise, reduce installing space, and there is certain cost advantage.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. an axial-flow leaf, comprise wheel hub (10) and be arranged on multiple blades (30) of periphery of described wheel hub (10), it is characterized in that, the camber line of described blade (30) section projection is radially formed by three sections of continous curves, described three sections of continous curves are respectively the first paragraph curve (S1) being positioned at inner side, be positioned at middle second segment curve (S2) and be positioned at outermost 3rd section of curve (S3), wherein, described first paragraph curve (S1) and described 3rd section of curve (S3) bend to suction surface (C), described second segment curve (S2) bends to pressure side (D),
Described first paragraph curve (S1) is bent to the position of the first botanical origin radius (R1) from the outward edge of described wheel hub (10) to described suction surface (C);
Described second segment curve (S2) is bent to the position of the second botanical origin radius (R2) from the position of described first botanical origin radius (R1) to described pressure side (D);
Described 3rd section of curve (S3) is bent to the position of the 3rd botanical origin radius (R3) from the position of described second botanical origin radius (R2) to described suction surface (C);
Wherein, the starting point of described first botanical origin radius (R1), described second botanical origin radius (R2) and described 3rd botanical origin radius (R3) is the center of described wheel hub (10);
The span of described first botanical origin radius is as follows: 1.05Rh≤R1≤0.9R3, and wherein, Rh represents the radius of wheel hub, and R1 represents the first botanical origin radius, and R3 represents the 3rd botanical origin radius.
2. axial-flow leaf according to claim 1, it is characterized in that, the position of described first botanical origin radius (R1) or the position of described 3rd primitive radius (R3) be described continous curve along axial-flow leaf central axis from pressure side (D) towards the peak on the direction of suction surface (C).
3. axial-flow leaf according to claim 1, it is characterized in that, the position of described first botanical origin radius (R1) and the position of described 3rd primitive radius (R3) be described continous curve along axial-flow leaf central axis from pressure side (D) towards the peak on the direction of suction surface (C).
4. the axial-flow leaf according to Claims 2 or 3, it is characterized in that, the outward edge of described wheel hub (10) or the position of described second botanical origin radius (R2) be described continous curve along axial-flow leaf central axis from pressure side (D) towards the minimum point on the direction of suction surface (C).
5. the axial-flow leaf according to Claims 2 or 3, it is characterized in that, the outward edge of described wheel hub (10) and the position of described second botanical origin radius (R2) be described continous curve along axial-flow leaf central axis from pressure side (D) towards the minimum point on the direction of suction surface (C).
6. axial-flow leaf according to claim 1, is characterized in that, the span of described second botanical origin radius is as follows:
1.05R1≤R2≤0.98R3, wherein, R1 represents the first botanical origin radius, and R2 represents the second botanical origin radius, and R3 represents the 3rd botanical origin radius.
7. axial-flow leaf according to claim 1, is characterized in that, described first paragraph curve (S1), second segment curve (S2) and described 3rd section of curve (S3) are all the matched curve by equation of higher order matching.
8. axial-flow leaf according to claim 1, is characterized in that, one or more snippets in described three sections of continous curves is wave molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110410948.0A CN103161759B (en) | 2011-12-09 | 2011-12-09 | Axial flow fan blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110410948.0A CN103161759B (en) | 2011-12-09 | 2011-12-09 | Axial flow fan blade |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103161759A CN103161759A (en) | 2013-06-19 |
| CN103161759B true CN103161759B (en) | 2016-03-02 |
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ID=48585174
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110410948.0A Active CN103161759B (en) | 2011-12-09 | 2011-12-09 | Axial flow fan blade |
Country Status (1)
| Country | Link |
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| CN (1) | CN103161759B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108180168A (en) * | 2017-12-27 | 2018-06-19 | 泛仕达机电股份有限公司 | A kind of compound bending fan blade and the fan including the blade |
| CN108506247A (en) * | 2018-05-09 | 2018-09-07 | 约克广州空调冷冻设备有限公司 | Blade and use its axial wheel |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3204208B2 (en) * | 1998-04-14 | 2001-09-04 | 松下電器産業株式会社 | Mixed-flow blower impeller |
| CN101457766A (en) * | 2008-12-18 | 2009-06-17 | 寿国理 | Highly effective low noise axial fan for vehicle |
| CN201739227U (en) * | 2009-11-12 | 2011-02-09 | 广东顺威精密塑料股份有限公司 | Middle-bended axial-flow fan blade |
| CN202326417U (en) * | 2011-12-09 | 2012-07-11 | 珠海格力电器股份有限公司 | Axial flow fan blade |
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