CN206449015U - Fan leaf annular multistage blade structure - Google Patents
Fan leaf annular multistage blade structure Download PDFInfo
- Publication number
- CN206449015U CN206449015U CN201720078775.XU CN201720078775U CN206449015U CN 206449015 U CN206449015 U CN 206449015U CN 201720078775 U CN201720078775 U CN 201720078775U CN 206449015 U CN206449015 U CN 206449015U
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- Prior art keywords
- blade
- axle center
- group
- flabellum axle
- blade group
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Abstract
The utility model discloses a kind of annular multistage blade structure of fan leaf, including flabellum axle center and at least two grade blade groups, the blade group includes the blade that multi-disc is set around flabellum axle center, connection ring is provided between adjacent two grade blades group, the distance in blade to the flabellum axle center in same grade blade group is equal, blade in same blade group has identical established angle, it is more than the established angle of the blade group away from flabellum axle center close to the established angle of the blade group in flabellum axle center, it is less than the axial projective area of the blade group away from flabellum axle center close to the axial projective area of the blade group in flabellum axle center, the ratio of axial projective area between adjacent two grade blades group is 1：1.1~4.The connection ring effectively shares blade pressure, there can be bigger overall front face area, even if reduction rotating speed can cause fan static pressure to reduce, but enhanced dynamic pressure effectively compensate for hydrostatic pressures losses, and reduction of speed noise reduction is realized while original operating efficiency is kept so as to reach.
Description
Technical field
The utility model is related to aeration technology field, particularly a kind of annular multistage blade structure of fan leaf.
Background technology
The blower fan of cooling tower, its flabellum is to be formed by multi-disc section for the blade ring of aerofoil profile or plate shape around axis arrangement, by
It is relatively large in diameter in flabellum（0.5 to 6.5 meter）, to keep the stress relative equilibrium of flabellum everywhere, the structure of each blade is designed
It is smaller into its width of blade further away from axis.When a diameter of fixed value of flabellum, to reach that Wind Volume is all by increasing leaf arc angle
The modes such as degree, increase width of blade, increase blade quantity, raising rotating speed are realized.Due to foregoing blade design principle, the number of blade
Measuring at most can be so that the projected area of adjacent blades overlaps, and instead resulting in air can not circulate.And increase leaf arc angle
Fan energy consumption requirement is limited to increase width of blade, there is also limiting value.Therefore the most feasible method is to improve blower fan
Rotating speed, but high-revolving blower fan can produce the noise of high-decibel so that cooling tower can not meet the standard of environmental monitoring evaluation.
Utility model content
The utility model provides a kind of annular multistage blade structure of fan leaf, former which employs brand-new blade design
Reason so that the overall front face area of flabellum is greatly increased, in the case of equivalent diameter, can also keep even if reduction rotation speed of fan
Sufficient ventilation.
A kind of annular multistage blade structure of fan leaf, including flabellum axle center and at least two grade blade groups, the blade group
It is provided between the blade set including multi-disc around flabellum axle center, adjacent two grade blades group in connection ring, same grade blade group
The distance in blade to flabellum axle center is equal, and the blade in same blade group has identical established angle, and the established angle is acute angle,
It is more than the established angle of the blade group away from flabellum axle center, the leaf close to flabellum axle center close to the established angle of the blade group in flabellum axle center
The axial projective area of piece group is less than between the axial projective area of the blade group away from flabellum axle center, adjacent two grade blades group
The ratio of axial projective area is 1：1.1~4.
Further, to be flexibly connected between the blade and flabellum axle center/connection ring, its established angle is solid by locking member
It is fixed.
Conventional fan flabellum is relatively large in diameter due to flabellum, to keep the stress relative equilibrium of flabellum everywhere, the knot of each blade
It is smaller that structure is both designed to its width of blade further away from axis.If flabellum is divided into multiple equidistant concentric annular regions,
Then further away from axis, the ratio that its blade area accounts for the concentric annular regions gross area can be substantially reduced.If the fan of conventional fan
Leaf rotating speed is reduced, then its rate of air circulation driven also can be reduced accordingly.
Due to needing to need the blast in pipeline everywhere as uniform as possible during blower fan discharge quantity of fan, and away from flabellum axle center
Blade group has higher linear velocity, to avoid blower fan discharge quantity of fan uneven, so the blade group away from flabellum axle center needs
Less established angle is set, with reduce in pipeline it is each between pressure difference.
Fan leaf annular multistage blade structure disclosed in the utility model, it has abolished biography by changing blade structure
The technology chains of system flabellum " its width of blade is smaller further away from axis ", its connection ring set up effectively is shared blade and is pressurized
Power, can there is bigger overall front face area, even if reduction rotating speed can cause fan static pressure to reduce, but enhanced dynamic pressure has
Effect compensate for hydrostatic pressures losses, and reduction of speed noise reduction is realized while original operating efficiency is kept so as to reach.
Brief description of the drawings
, below will be to needed for embodiment description in order to illustrate more clearly of the technical scheme in the utility model embodiment
The accompanying drawing to be used is briefly described.Obviously, described accompanying drawing is a part of embodiment of the present utility model, rather than entirely
Portion's embodiment, those skilled in the art on the premise of not paying creative work, can also obtain it according to these accompanying drawings
His design and accompanying drawing.
Fig. 1 is the top view of the annular multistage blade structure of the fan leaf；
Fig. 2 is the side view of the annular multistage blade structure of the fan leaf；
Fig. 3 is the three-dimensional view of the annular multistage blade structure of the fan leaf.
Embodiment
The technique effect of design of the present utility model, concrete structure and generation is carried out below with reference to embodiment and accompanying drawing
Clearly and completely describe, to be completely understood by the purpose of this utility model, feature and effect.Obviously, described embodiment
It is a part of embodiment of the present utility model, rather than whole embodiments, based on embodiment of the present utility model, the skill of this area
The other embodiment that art personnel are obtained on the premise of not paying creative work, belongs to the model of the utility model protection
Enclose.In addition, all connection/annexations being previously mentioned in text, not singly refer to component and directly connect, and refer to can be according to specific reality
Situation is applied, by adding or reducing couple auxiliary, to constitute more excellent draw bail.Each technology in the invention is special
Levy, can be with combination of interactions on the premise of not conflicting conflict.
Embodiment 1
As shown in Figures 1 to 3, a kind of annular multistage blade structure of fan leaf, including the grade blade group of flabellum axle center 1 and three,
The blade group is respectively primary blades group, secondary blades group and exhaust stage blade group from inside to outside, and each blade group includes many loops
The blade 2 being provided between the blade 2 set around flabellum axle center 1, adjacent two grade blades group in connection ring 3, same grade blade group is arrived
The distance in flabellum axle center 1 is equal.Blade 2 in same blade group has identical established angle, and the established angle is acute angle, primary
The established angle of blade group is more than the established angle of secondary blades group, and the established angle of secondary blades group is more than the installation of exhaust stage blade group
Angle, to be flexibly connected between the blade 2 and the connection ring 3 of flabellum axle center 1/, its established angle is fixed by locking member.Due to cooling
The working environment of tower blower fan is different, so the established angle of each blade group is adjustable design, it is specific only to meet above-mentioned big
Small relation.It is less than the axial direction of the blade group away from flabellum axle center 1 close to the axial projective area of the blade group in flabellum axle center 1
Projected area, the ratio of the axial projective area of primary blades group, secondary blades group and exhaust stage blade group is 1：1.5：3.5.
Embodiment 2
Conventional fan flabellum and the annular multistage blade structure table of comparisons of fan leaf of the present invention are as follows：
The table of comparisons
Better embodiment of the present utility model is illustrated above, but the invention be not limited to it is described
Embodiment, those skilled in the art can also make a variety of equivalent changes on the premise of without prejudice to the utility model spirit
Type or replacement, these equivalent modifications or replacement are all contained in the application claim limited range.
Claims (2)
1. a kind of annular multistage blade structure of fan leaf, it is characterised in that：Including flabellum axle center（1）At least two grade blades
Group, the blade group includes multi-disc around flabellum axle center（1）The blade of setting（2）, provided with connection between adjacent two grade blades group
Ring（3）, the blade in same grade blade group（2）To flabellum axle center（1）Distance it is equal, the blade in same blade group（2）Tool
There is identical established angle, the established angle is acute angle, close to flabellum axle center（1）The established angle of blade group be more than away from flabellum axle
The heart（1）Blade group established angle, close to flabellum axle center（1）The axial projective area of blade group be less than away from flabellum axle center
（1）Blade group axial projective area, the ratio of the axial projective area between adjacent two grade blades group is 1：1.1~4.
2. the annular multistage blade structure of fan leaf according to claim 1, it is characterised in that：The blade（2）With fan
The rachis heart（1）/ connection ring（3）Between to be flexibly connected, its established angle fixed by locking member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720078775.XU CN206449015U (en) | 2017-01-19 | 2017-01-19 | Fan leaf annular multistage blade structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720078775.XU CN206449015U (en) | 2017-01-19 | 2017-01-19 | Fan leaf annular multistage blade structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206449015U true CN206449015U (en) | 2017-08-29 |
Family
ID=59667758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720078775.XU Expired - Fee Related CN206449015U (en) | 2017-01-19 | 2017-01-19 | Fan leaf annular multistage blade structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206449015U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762828A (en) * | 2017-01-19 | 2017-05-31 | 梁耀文 | Fan leaf annular multistage blade structure |
| CN112128050A (en) * | 2020-10-29 | 2020-12-25 | 上海电气风电集团股份有限公司 | Noise reduction structure, blade and wind generating set |
-
2017
- 2017-01-19 CN CN201720078775.XU patent/CN206449015U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762828A (en) * | 2017-01-19 | 2017-05-31 | 梁耀文 | Fan leaf annular multistage blade structure |
| CN112128050A (en) * | 2020-10-29 | 2020-12-25 | 上海电气风电集团股份有限公司 | Noise reduction structure, blade and wind generating set |
| CN112128050B (en) * | 2020-10-29 | 2022-02-11 | 上海电气风电集团股份有限公司 | Noise reduction structure, blade and wind generating set |
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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: 20170829 Termination date: 20190119 |