CN2165269Y - Sweptforward front-inclined blade type low-noise axial-flow fan - Google Patents
Sweptforward front-inclined blade type low-noise axial-flow fan Download PDFInfo
- Publication number
- CN2165269Y CN2165269Y CN 93212925 CN93212925U CN2165269Y CN 2165269 Y CN2165269 Y CN 2165269Y CN 93212925 CN93212925 CN 93212925 CN 93212925 U CN93212925 U CN 93212925U CN 2165269 Y CN2165269 Y CN 2165269Y
- Authority
- CN
- China
- Prior art keywords
- blade
- fan
- sweptforward
- unequal
- veneer
- Prior art date
- 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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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model relates to a novel blade-shaped axial-flow ventilator, and the blade of fan ventilator is assembled as integration by a novel forming method and an unequal grid pitch dosing method. The blades are sweptforward on rotation direction (namely along the blade height direction), the sweptforward angle alpha is 20-40DEG, the blades are axially forward, and the forward angle beta is 15-30DEG. The blades are dosed by a symmetrical and unequal grid pitch mode on wheel hubs, and the grid pitch t [1] is unequal to t [2]. The utility model not only reduces the separation and the secondary loss of airflow, but also greatly reduces the noise of the fan, so the fan efficiency is enhanced, and the environmental protection condition is efficiently improved.
Description
The utility model relates to a kind of propeller fan, is mainly used in to carry gas medium below 80 ℃.
Existing propeller fan generally adopts circular arc plate and wing blades shape, exists shortcomings such as fan noise height, efficient be low.
The purpose of this utility model is to adopt new veneer blade forming method, to reduce the axial-flow blower noise significantly and to raise the efficiency.
The utility model is achieved in that the blade of blower fan adopts uniform section center of gravity sweepforward mode to superpose along short transverse, and blade leans forward vertically simultaneously.Reduce the separation of air-flow on blade surface and the formation of air-flow vortex like this, reduced the secondary loss of air-flow in the blower fan, thereby reduced the air moving noise of sound source, also improved the efficient of blower fan.
Blade adopts symmetry not wait the dosage mode of pitch on wheel hub, to reduce the narrow audio-frequency noise of blower fan, blade adopts veneer uniform section or veneer unequal section structure, blade can be made with different materials (routine steel, aluminium etc.), with welding or riveted joint mode and wheel hub connection, its simple in structure, easy for installation, good manufacturability.
Advantage of the present utility model is to reduce into the blower fan industry noise of axial-flow blower, and improving fan efficiency provides a kind of new technology.The transformation that is applied to existing blower fan can reduce fan noise significantly, and improvement work and living environment improve fan efficiency, energy saving, has good society and economy benefit.
Description of drawings:
Fig. 1 is a structural drawing of the present utility model, and wherein 1 is blade, the 2nd, and wheel hub, motor 3, airduct 4, strut 5, nut 6, support 7.
Fig. 2 is the fan blade side view, and the top rake of blade is β=15 °-30 °.
Fig. 3 is the fan blade front view, and the sweepforward angle of blade is α=20 °-40 °.
Pitch between adjacent blades is t
1, t
2, t
1≠ t
2
Embodiment: Fig. 1, Fig. 2 and Fig. 3 are one of present embodiment, its α=20 °, β=15 °, employing be welded structure.Be made of a steel, impeller directly connects with motor, and what blade adopted on wheel hub is that symmetry does not wait grid dosage mode.
Claims (5)
1, a kind of low noise propeller fan is by blade. wheel hub. and motor. air duct. supporting rod. support. nuts etc. are formed, and it is characterized in that:
A. blade adopts the mode of centroid of section sweepforward to superpose along its short transverse, sweepforward angle α=20 °-40 °;
B. blade turns forward vertically, top rake β=15 °-30 °;
C. blade adopts symmetry not wait the dosage mode of pitch on wheel hub, and pitch is t
1.t
2, and t
1≠ t
2
D. blade with can be connecting of wheel hub the welding or riveted structure.
2, ventilator according to claim 1 is characterized in that blade is veneer uniform section or veneer unequal section structure.
3, ventilator according to claim 1 is characterized in that blade is veneer uniform section or veneer unequal section structure.
4, ventilator according to claim 1 is characterized in that and can vertically install, and also can horizontally install.
5, ventilator according to claim 1 is characterized in that impeller can adopt the cast inblock structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93212925 CN2165269Y (en) | 1993-05-20 | 1993-05-20 | Sweptforward front-inclined blade type low-noise axial-flow fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93212925 CN2165269Y (en) | 1993-05-20 | 1993-05-20 | Sweptforward front-inclined blade type low-noise axial-flow fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2165269Y true CN2165269Y (en) | 1994-05-18 |
Family
ID=33794136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93212925 Expired - Fee Related CN2165269Y (en) | 1993-05-20 | 1993-05-20 | Sweptforward front-inclined blade type low-noise axial-flow fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2165269Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100339601C (en) * | 2003-09-05 | 2007-09-26 | Lg电子株式会社 | Axial flow fan |
| CN100357610C (en) * | 2003-03-28 | 2007-12-26 | 中国科学院工程热物理研究所 | Axial ventilating machine impellor |
| CN100408864C (en) * | 2000-06-16 | 2008-08-06 | 罗伯特博施公司 | Automotive fan assembly with flared shroud and fan with conforming blade tips |
-
1993
- 1993-05-20 CN CN 93212925 patent/CN2165269Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100408864C (en) * | 2000-06-16 | 2008-08-06 | 罗伯特博施公司 | Automotive fan assembly with flared shroud and fan with conforming blade tips |
| CN100357610C (en) * | 2003-03-28 | 2007-12-26 | 中国科学院工程热物理研究所 | Axial ventilating machine impellor |
| CN100339601C (en) * | 2003-09-05 | 2007-09-26 | Lg电子株式会社 | Axial flow fan |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |