CN203730399U - Axial flow impeller and axial flow fan - Google Patents
Axial flow impeller and axial flow fan Download PDFInfo
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- CN203730399U CN203730399U CN201420098769.7U CN201420098769U CN203730399U CN 203730399 U CN203730399 U CN 203730399U CN 201420098769 U CN201420098769 U CN 201420098769U CN 203730399 U CN203730399 U CN 203730399U
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Abstract
The utility model provides an axial flow impeller and an axial flow fan. The axial flow impeller comprises a hub and a plurality of blades. Each blade is provided with a front edge, a tail edge and an outer edge. The intersection of the tail edge and the outer edge is a first intersection. The intersection of the tail edge and the hub is a second intersection. The connecting line of the center of the hub and the first intersection is a first connecting line. The connecting line of the center of the hub and the second intersection is a second connecting line. The included angle theta of the projections, in a plane vertical to the axis of the hub, of the first connecting line and the second connecting line, and theta ranges from 20 degrees to 40 degrees. By the structure, the tail edge structure is optimized, radial flow the air flows on the blades is controlled effectively, acting capability of the axial flow impeller is increased, and fan efficiency is increased.
Description
Technical field
The utility model relates to blower fan field, in particular to a kind of axial-flow leaf and axial-flow blower.
Background technique
Axial-flow leaf is generally used in air conditioner outdoor machine or other air regenerating devices, plays the effect that circulating air flows, promotes heat exchanger heat exchange amount.Existing air conditioner is to form by having the circular hub portion of rotating center and being the several blades of radial arrangement at wheel hub outer circumferential side by the basic structure of axial-flow leaf, and blade is drawn by three-dimension curved surface shape.Axial-flow leaf drives rotation by motor, and air flows into from the leading edge of blade, by being flowed out by the trailing edge of blade after blade acting acquisition voltage rise.
In prior art, axial-flow leaf is generally made up of wheel hub and blade, and blade has leading edge, blade face and trailing edge, and existing vaned trailing edge is straight line substantially.In existing axial-flow leaf design, generally wish that air motion can flow along cylindrical layer, but in actual moving process, air current flow often can not well flow along cylindrical layer, occur Radial Flow, larger Radial Flow has a strong impact on the acting ability of fan blade, affects efficiency and increases noise.
Model utility content
The utility model aims to provide a kind of axial-flow leaf and axial-flow blower that improves mechanical efficiency.
The utility model provides a kind of axial-flow leaf, comprise wheel hub and multiple blade, each blade has leading edge, trailing edge and outer rim, the intersection point of trailing edge and outer rim is the first intersection point, and the intersection point of trailing edge and wheel hub is the second intersection point, and the line of the center of wheel hub and the first intersection point is the first line, the line of the center of wheel hub and the second intersection point is the second line, the angle of the first line and the projection of the second line in the plane of the axis perpendicular to wheel hub is θ, wherein, and 20 °≤θ≤40 °.
Further, 25 °≤θ≤35 °.
Further, the projection of the outer rim of multiple blades in the plane of the axis perpendicular to wheel hub is positioned on same circumference.
Further, trailing edge be towards with the direction convex of blade rotary opposite direction.
Further, in the projection of blade in the plane of the axis perpendicular to wheel hub, the line of the projection of the projection of the first intersection point and the second intersection point is the 3rd line, the maximum point of distance of relative the 3rd line of projection and the distance at the center of wheel hub of trailing edge are Rc, wherein, 0.8R≤Rc≤1.2R, R=(Rt+Rh)/2, Rt is the radius of the projection of outer rim, the radius that Rh is wheel hub.
Further, 0.9R≤Rc≤1.1R.
Further, blade is three, and three blades are uniformly distributed.
The utility model also provides a kind of axial-flow blower, comprises fan blade, and fan blade is aforesaid axial-flow leaf.
According to axial-flow leaf of the present utility model and axial-flow blower, by to trailing edge structure optimization, making trailing edge two-end-point and the angle of the projection of line profile center in the plane perpendicular to hub axis is θ, and make 20 °≤θ≤40 °, thereby effectively control the Radial Flow of blade overdraught, promote the acting ability of axial-flow leaf, improve fan efficiency.
Brief description of the drawings
The accompanying drawing that forms the application's a part is used to provide further understanding of the present utility model, and schematic description and description of the present utility model is used for explaining the utility model, does not form improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the first projection structure schematic diagram in the plane perpendicular to hub axis according to axial-flow leaf of the present utility model;
Fig. 2 is the second projection structure schematic diagram in the plane perpendicular to hub axis according to axial-flow leaf of the present utility model; And
Fig. 3 is the projection structure schematic diagram in the plane that is parallel to hub axis according to axial-flow leaf of the present utility model.
Embodiment
Describe below with reference to the accompanying drawings and in conjunction with the embodiments the utility model in detail.
As depicted in figs. 1 and 2, according to axial-flow leaf of the present utility model, comprise wheel hub 10 and multiple blade 20, each blade 20 has leading edge 21, trailing edge 22 and outer rim 23, trailing edge 22 is the first intersection point A with the intersection point of outer rim 23, trailing edge 22 is the second intersection points B with the intersection point of wheel hub 10, the line of wheel hub 10 center and the first intersection point A is the first line L1, the line of wheel hub 10 center and the second intersection points B is the second line L2, the angle of the first line L1 and the second projection of line L2 in the plane of the axis perpendicular to wheel hub 10 is θ, wherein, 20 °≤θ≤40 °.Axial-flow leaf of the present utility model, by to trailing edge structure optimization, making trailing edge two-end-point and the angle of the projection of line profile center in the plane perpendicular to hub axis is θ, and make 20 °≤θ≤40 °, thereby effectively control the Radial Flow of blade overdraught, promote the acting ability of axial-flow leaf, improve fan efficiency.
Preferably, 25 °≤θ≤35 °, more preferably, when θ is 30 °, Radial Flow air-flow obtains more excellent control, makes the acting ability of axial-flow leaf reach higher level.
As shown in Figures 2 and 3, the utility model more preferably axial-flow leaf in embodiment is three wings formula axial-flow leaf, comprise three blades, three blades radially distribute in the periphery of wheel hub, usually, three blades are uniformly distributed as much as possible, and three blades are as much as possible equidistant distribution in the scope of 120 ° ± 5 °.Preferably, the projection of the outer rim 23 of three blades 20 in the plane of the axis perpendicular to wheel hub 10 is positioned on same circumference, thereby air-flow is flowed along cylindrical layer, also can further control the Radial Flow of air-flow, improves fan efficiency.
Preferably, in order to improve trailing edge airflow breakaway, on the trailing edge of each blade, protuberance is set, and each protuberance is relatively outstanding to the contrary direction of the sense of rotation of each blade with the line of trailing edge two-end-point, the trailing edge 22 that is blade of the present utility model is towards the direction convex contrary with blade 20 sense of rotation, the acting ability at blade middle part be can effectively promote, air-supply noise and efficient wind pushing performance taken into account simultaneously.
More preferably, in order to make trailing edge airflow breakaway effect better, thereby make acting ability more excellent, blade of the present utility model has also been made optimization to the convex of trailing edge.Particularly, the radius (radius of the flange of outer rim 23) of establishing fan blade is Rt, and the radius of wheel hub 10 is Rh, and the circumference of definition R=(Rt+Rh)/2 is blade center line.In projection at blade 20 in the plane of the axis perpendicular to wheel hub 10, the line of the projection of the projection of the first intersection point A and the second intersection points B is the 3rd line L3, the distance of relative the 3rd line L3 of projection of trailing edge 22 is d, the point that d is obtained on peaked trailing edge is C, the distance at some C and wheel hub 10 center is Rc, and 0.8R≤Rc≤1.2R.Be near of the maximum protuberance trailing edge blade center line of trailing edge, be more conducive to improve trailing edge airflow breakaway effect.
Preferably, 0.9R≤Rc≤1.1R, more preferably, when Rc equals R, trailing edge airflow breakaway effect is better, and blade obtains better acting ability.
The utility model also provides a kind of axial-flow blower, comprises aforesaid axial-flow leaf, thereby effectively improves the airflow breakaway of blade trailing edge 22, weakens the Radial Flow of air-flow, strengthens the acting ability of blade, improves the efficiency of axial-flow blower.
As can be seen from the above description, the utility model the above embodiments have realized following technique effect:
According to axial-flow leaf of the present utility model and axial-flow blower, by to trailing edge structure optimization, making trailing edge two-end-point and the angle of the projection of line profile center in the plane perpendicular to hub axis is θ, and make 20 °≤θ≤40 °, thereby effectively control the Radial Flow of blade overdraught, promote the acting ability of axial-flow leaf, improve fan efficiency.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (8)
1. an axial-flow leaf, comprises wheel hub (10) and multiple blade (20), and each described blade (20) has leading edge (21), trailing edge (22) and outer rim (23), it is characterized in that,
Described trailing edge (22) is the first intersection point (A) with the intersection point of described outer rim (23), described trailing edge (22) is the second intersection point (B) with the intersection point of described wheel hub (10), the line of the center of described wheel hub (10) and described the first intersection point (A) is the first line (L1), the line of the center of described wheel hub (10) and described the second intersection point (B) is the second line (L2), described the first line (L1) is θ with the angle of the projection of described the second line (L2) in the plane of the axis perpendicular to described wheel hub (10), wherein, 20 °≤θ≤40 °.
2. axial-flow leaf according to claim 1, is characterized in that,
25°≤θ≤35°。
3. axial-flow leaf according to claim 1, is characterized in that,
The projection of the described outer rim (23) of multiple described blades (20) in the plane of the axis perpendicular to described wheel hub (10) is positioned on same circumference.
4. axial-flow leaf according to claim 3, is characterized in that,
Described trailing edge (22) is towards the direction convex contrary with described blade (20) sense of rotation.
5. axial-flow leaf according to claim 4, is characterized in that,
In the projection of described blade (20) in the plane of the axis perpendicular to described wheel hub (10), the line of the projection of the projection of described the first intersection point (A) and described the second intersection point (B) is the 3rd line (L3), the maximum point (C) of distance of relatively described the 3rd line (L3) of projection of described trailing edge (22) and the distance at the center of described wheel hub (10) are Rc, wherein, 0.8R≤Rc≤1.2R, R=(Rt+Rh)/2, Rt is the radius of the projection of described outer rim (23), and Rh is the radius of described wheel hub (10).
6. axial-flow leaf according to claim 5, is characterized in that,
0.9R≤Rc≤1.1R。
7. axial-flow leaf according to claim 1, is characterized in that,
Described blade (20) is three, and three described blades (20) are uniformly distributed.
8. an axial-flow blower, comprises fan blade, it is characterized in that, described fan blade is the axial-flow leaf described in any one in claim 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420098769.7U CN203730399U (en) | 2014-03-05 | 2014-03-05 | Axial flow impeller and axial flow fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420098769.7U CN203730399U (en) | 2014-03-05 | 2014-03-05 | Axial flow impeller and axial flow fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203730399U true CN203730399U (en) | 2014-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420098769.7U Expired - Lifetime CN203730399U (en) | 2014-03-05 | 2014-03-05 | Axial flow impeller and axial flow fan |
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| Country | Link |
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| CN (1) | CN203730399U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104895838A (en) * | 2014-03-05 | 2015-09-09 | 珠海格力电器股份有限公司 | Axial flow blade and axial flow fan |
| CN110500320A (en) * | 2019-08-21 | 2019-11-26 | 广东顺威精密塑料股份有限公司 | A kind of aerofoil fan |
-
2014
- 2014-03-05 CN CN201420098769.7U patent/CN203730399U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104895838A (en) * | 2014-03-05 | 2015-09-09 | 珠海格力电器股份有限公司 | Axial flow blade and axial flow fan |
| CN110500320A (en) * | 2019-08-21 | 2019-11-26 | 广东顺威精密塑料股份有限公司 | A kind of aerofoil fan |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140723 |