CN207363949U - Mute axial flow fan blade - Google Patents
Mute axial flow fan blade Download PDFInfo
- Publication number
- CN207363949U CN207363949U CN201721173991.9U CN201721173991U CN207363949U CN 207363949 U CN207363949 U CN 207363949U CN 201721173991 U CN201721173991 U CN 201721173991U CN 207363949 U CN207363949 U CN 207363949U
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- CN
- China
- Prior art keywords
- trailing edge
- blade
- axial
- flow fan
- tip
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- 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
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- 241000883990 Flabellum Species 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses an axial fan flabellum of silence, connect including cylindrical wheel hub and whole hub last and follow the blade that wheel hub extends out, the blade comprises the sunken leading edge of inside one-tenth arc that connects gradually, outside one-tenth arc outstanding lateral margin, the sunken first trailing edge of inside one-tenth arc, outside one-tenth arc outstanding second trailing edge and the sunken third trailing edge of inside, the inboard of leading edge, the inboard and the wheel hub fixed connection at third trailing edge, inclination between blade and the horizontal plane is between 40 degrees to 60 degrees, and the jingle bell blade is mutually not overlapped in vertical direction, the utility model discloses when using in air conditioner fan, the noise is lower, and the wind pressure is big, can blow the air current to farther distance, satisfies the demand of novel axial-flow air conditioner fan.
Description
Technical field
A kind of aerofoil fan is the utility model is related to, particularly a kind of flabellum of the small aerofoil fan of noise.
Background technology
Aerofoil fan is a kind of fan for being widely used in field of radiating, it is usually along the side parallel to fan rotation axis line
To mobile air.Have the advantages that air quantity is big, noise is small under certain condition, it is generally used for that traffic requirement is higher and pressure will
Relatively low occasion is sought, but this aerofoil fan is not yet used in existing air cooler, its reason is that its wind pressure is low, can not incite somebody to action
Cold air is sent to farther scope, if using existing aerofoil fan instead and using powerful motor, is inevitably resulted in and is made an uproar
Sound increases, and does not also meet the use environment of air cooler, so needing a kind of low noise that can be used cooperatively with heavy-duty motor
Electric fan solves the problems, such as this.
The content of the invention
For overcome the deficiencies in the prior art, the utility model provide a kind of running noise is small, greater pressure can be produced and
The flabellum of the aerofoil fan of air quantity.
Technical solution is used by the utility model solves its technical problem：
A kind of mute Axial-flow Fan, including cylindrical bosses and be integrally connected on the wheel hub and from wheel hub
In the blade that extends out, the side that the blade is protruded by the sequentially connected inwardly concave leading edge of camber, outside camber
Concave first trailing edge of edge, inside camber, the second trailing edge that outside camber protrudes and the 3rd trailing edge composition being recessed inwardly,
The inner side of the leading edge, the inner side of the 3rd trailing edge are fixedly connected with the wheel hub, and the angle of inclination of the blade is at 40 degree
To between 60 degree.
Tip is cut before being provided with continuously in the front end of the leading edge.
The front end of the lateral margin is provided with continuous lateral incision tip.
Tip is cut after being provided with continuous first in the front end of first trailing edge.
Tip is cut after being provided with continuous second in the front end of second trailing edge.
Tip is cut after being provided with the continuous 3rd in the front end of 3rd trailing edge.
Even number that the blade is at least two and two-by-two mirror alignment each other.
Odd number and the decile arrangement that the blade is at least three.
Multiple blade in the vertical direction dislocation.
The width of 3rd trailing edge is the first trailing edge, the 15%-25% of the sum of the second trailing edge width, the width of the leading edge
Spend for the 115%-135% of the sum of the first trailing edge, the second trailing edge width.
The beneficial effects of the utility model are：The blade of the utility model by it is sequentially connected inwardly camber it is concave before
Edge, outside camber protrude lateral margin, concave first trailing edge of inside camber, outside camber protrude the second trailing edge and to
3rd trailing edge of sunken inside is formed, and for the angle of inclination between blade and horizontal plane between 40 degree to 60 degree, the utility model should
When in air cooler, noise is lower, and wind pressure is big, and air-flow can be blowed to farther distance, meet Novel axial flow type air cooler
Demand.
Brief description of the drawings
The utility model is further illustrated with reference to the accompanying drawings and examples.
Fig. 1 is the top view of the utility model；
Fig. 2 is the bottom view of the utility model；
Fig. 3 is the side view of the utility model.
Embodiment
Referring to figs. 1 to Fig. 3, a kind of mute Axial-flow Fan, including cylindrical bosses 1 and be integrally connected to described
The blade 2 to extend out on wheel hub 1 and from wheel hub 1, the blade 2 is by the sequentially connected inwardly concave leading edge of camber
21st, the second trailing edge that the lateral margin 22 of outside camber protrusion, concave first trailing edge 23 of inside camber, outside camber protrude
24 are formed with the 3rd trailing edge 25 being recessed inwardly, the inner side of the leading edge 21, inner side and the wheel hub 1 of the 3rd trailing edge 25
It is fixedly connected, the angle of inclination of the blade 2 is between 40 degree to 60 degree, and the angle of inclination is as shown in d in Fig. 3, in this implementation
In example, the first trailing edge, the second trailing edge and the 3rd trailing edge in same level, the angle of inclination by connect the leading edge of blade with
Line between first trailing edge, the second trailing edge and the 3rd trailing edge measures, this line and horizontal plane phase when wheel hub 1 is horizontal positioned
Hand over, the angle of the angle of inclination, that is, horizontal plane and the line.
In the present embodiment, the sweepforward angle of the leading edge 21 for 12 degree -18 spend, the angle of inclination as shown in E in Fig. 2,
Tip 211 is cut in the front end of the leading edge 21 before being provided with continuously, and the front end of the lateral margin 22 is provided with continuous lateral incision tip
221, tip 231 is cut in the front end of first trailing edge 23 after being provided with continuous first, and the front end of second trailing edge 24 is set
Cut tip 241 after having continuous second, tip 251 is cut in the front end of the 3rd trailing edge 25 after being provided with the continuous 3rd, described
Before cut to cut behind tip 211, lateral incision tip 221, first and cut tip 241 behind tip 231 and second and be respectively positioned on the upper of the blade 2
Side, cuts the downside that tip 251 is located at the blade 2 after the described 3rd, the air-flow positioned at root of blade cuts tip 251 after the 3rd
It is upper to cut the upside that tip 251 flows to the blade 2 after the 3rd later, improve the outlet wind pressure on blade.
In the present embodiment, the arrangement mode of blade is divided into two kinds, the even number of at least two, the blade 2 and two-by-two
Mirror alignment each other, odd number and the decile arrangement of at least three, the blade 2, multiple 2 in the vertical directions of blade
Dislocation, particularly adjacent blades dislocation, i.e., projection in the axial direction will not overlap, and such air-flow will not produce between adjacent blades
Raw noise, improves muting function.
In the present embodiment, the relation between the width between the first trailing edge, the second trailing edge, the 3rd trailing edge, leading edge according to
It is expressed as below, the width of the 3rd trailing edge 25 is as shown in b in Fig. 1, and the sum of the first trailing edge 23,24 width of the second trailing edge are such as a institutes in Fig. 1
Show, the width of leading edge 21 as shown in c in Fig. 1, the width of the 3rd trailing edge 25 is the first trailing edge 23,24 width of the second trailing edge it
The 15%-25% of sum, the adjacent wheel hub 1 of the 3rd trailing edge 25, so accelerates from the air-flow of the flowing of root of blade, improves
Air output；The width of the leading edge 21 is the 115%-135% of the sum of the first trailing edge 23,24 width of the second trailing edge, this significantly increases
Blade area is added so that this Axial-flow Fan can go out one's intention as revealed in what one says with the lift of bigger, higher quality flow and higher
Pressure carrys out work.
The fan sound power horizontal (unit dBA) that this Axial-flow Fan manufactures is used to be determined by the following formula：
PWL=C+30*log10 (TS/1000)+10*log10 (HP)+Add
Wherein：
PWL=fans sound power level (unit dBA)；
C=fan baseline noise levels (unit dBA), depending on it is by blade design；
TS=fan tips speed (unit is ft/ minutes), it is equal to π * fan RPM* fan diameters；
HP=fan shaft horsepower；
Add=additional noises caused by entering and installing effect；
Fan tip speed and horsepower are the key factors for determining fan noise it can be seen from the equation, therefore, even
The fan manufactured earlier can be by reducing fan horsepower and/or tip speed and quiet to specific degrees.Compare however, working as
During the noise level of the two kinds of operation fans to work with identical size and with same criterion under identical environment, determine by the wind
The variable for fanning the overall noise (i.e. PWL) produced is " C ".
For narrow string blade earlier, " C " is usually 53-55dB, and for the general ultra low noise with curved leading edge
Fan, " C " being capable of as low as 43-45dBA.Therefore, for identical fan speed and horsepower, by using general ultra low noise wind
Fan, can be than conventional fan (conventional fan does not have with the concave leading edge of inside camber with identical size and blade)
Reduce until the noise of 10dBA.Example including example embodiment blade (blade has the leading edge of fairly linear sweepforward) is real
Applying a fan also has as low as 43-45dBA and even lower " C " value.Therefore, the utility model is made fan produce with it is common
The identical noise of super low noise fan, or even produce more low noise.
Finally it should be noted that：The above descriptions are merely preferred embodiments of the present invention, is not limited to this
Utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art
For, it can still modify the technical solution described in foregoing embodiments, or to which part technical characteristic
Equivalent substitution is carried out, where within the spirit and principles of the present invention, any modification, equivalent replacement, improvement and so on,
It should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of mute Axial-flow Fan, including cylindrical bosses（1）Be integrally connected to the wheel hub（1）It is upper and from
Wheel hub（1）In the blade that extends out（2）, it is characterised in that the blade（2）It is concave by sequentially connected inwardly camber
Leading edge（21）, the lateral margin that protrudes of outside camber（22）, inside concave first trailing edge of camber（23）, outside camber protrudes
The second trailing edge（24）With the 3rd trailing edge being recessed inwardly（25）Form, the leading edge（21）Inner side, the 3rd trailing edge
（25）Inner side and the wheel hub（1）It is fixedly connected, the blade（2）Angle of inclination between 40 degree to 60 degree.
2. Axial-flow Fan according to claim 1, it is characterised in that the leading edge（21）Front end be provided with continuously
Before cut tip（211）.
3. Axial-flow Fan according to claim 1, it is characterised in that the lateral margin（22）Front end be provided with continuously
Lateral incision tip（221）.
4. according to any Axial-flow Fans of claim 1-3, it is characterised in that first trailing edge（23）Front end
Tip is cut after being provided with continuous first（231）.
5. Axial-flow Fan according to claim 1, it is characterised in that second trailing edge（24）Front end be provided with
Tip is cut after continuous second（241）.
6. Axial-flow Fan according to claim 1, it is characterised in that the 3rd trailing edge（25）Front end be provided with
Tip is cut after continuous 3rd（251）.
7. Axial-flow Fan according to claim 1, it is characterised in that the blade（2）The even number of at least two
And mirror alignment each other two-by-two.
8. Axial-flow Fan according to claim 1, it is characterised in that the blade（2）The odd number of at least three
And decile arranges.
9. the Axial-flow Fan according to claim 7 or 8, it is characterised in that multiple blades（2）In vertical direction
Upper dislocation.
10. Axial-flow Fan according to claim 1, it is characterised in that the 3rd trailing edge（25）Width be first
Trailing edge（23）, the second trailing edge（24）The 15%-25% of the sum of width, the leading edge（21）Width be the first trailing edge（23）, second
Trailing edge（24）The 115%-135% of the sum of width.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721173991.9U CN207363949U (en) | 2017-09-12 | 2017-09-12 | Mute axial flow fan blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721173991.9U CN207363949U (en) | 2017-09-12 | 2017-09-12 | Mute axial flow fan blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207363949U true CN207363949U (en) | 2018-05-15 |
Family
ID=62348529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721173991.9U Expired - Fee Related CN207363949U (en) | 2017-09-12 | 2017-09-12 | Mute axial flow fan blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207363949U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109114041A (en) * | 2018-10-15 | 2019-01-01 | 西安热工研究院有限公司 | A kind of axial flow fans rotor blade root rounding modeling structure |
-
2017
- 2017-09-12 CN CN201721173991.9U patent/CN207363949U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109114041A (en) * | 2018-10-15 | 2019-01-01 | 西安热工研究院有限公司 | A kind of axial flow fans rotor blade root rounding modeling structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180515 Termination date: 20210912 |