CN102635573A - Tooth-shaped trailing edge axial flow fan - Google Patents
Tooth-shaped trailing edge axial flow fan Download PDFInfo
- Publication number
- CN102635573A CN102635573A CN201210127383XA CN201210127383A CN102635573A CN 102635573 A CN102635573 A CN 102635573A CN 201210127383X A CN201210127383X A CN 201210127383XA CN 201210127383 A CN201210127383 A CN 201210127383A CN 102635573 A CN102635573 A CN 102635573A
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- China
- Prior art keywords
- trailing edge
- tooth
- motor
- shaped trailing
- fixing frame
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Abstract
The invention discloses a tooth-shaped trailing edge axial flow fan. The noise reduction effect of the existing fan is not good. The tooth-shaped trailing edge axial flow fan disclosed by the invention comprises a casing, a motor fixing frame, a motor, a wheel hub and tooth-shaped trailing edge blades, wherein the tooth-shaped trailing edge blades are mounted on the wheel hub at equal intervals along the circumferential direction, the wheel hub is connected with the motor through a rotating shaft, the motor is fixed on the motor fixing frame, and the motor fixing frame is fixed in the casing. The tooth-shaped trailing edge axial flow fan disclosed by the invention reduces a separation region of a boundary layer on the whole; and furthermore, saw teeth on the tooth-shaped trailing edge blades can segment and disperse a strong concentrated vortex into a plurality of small vortexes, so that the turbulence intensity of the boundary layer is reduced, the turbulence state of the boundary layer is improved, and the purposes of weakening the trails of the blades and reducing the noise are further achieved.
Description
Technical field
The invention belongs to radiating device technical field, relate in particular to a kind of profile of tooth trailing edge axial fan, this axial fan has profile of tooth trailing edge blade.
Background technique
The small-size shaft flow fan is easy to use, cost is low, is widely used in civilian and commercial heat dissipation ventilation.In recent years; Because the develop rapidly of computer industry and the raising of people's living standard; High-performance, low noise small-size shaft flow fan become the first-selection of heat radiation; It is a kind of effective method that the rotor blade shape of change fan is come noise reduction, and reasonably blade shape can effectively reduce the noise of fan.
Summary of the invention
The objective of the invention is the deficiency to existing technology, a kind of profile of tooth trailing edge axial fan is provided,, change the trailing edge shape and design a kind of novel microminiature axial fan through optimizing the structure of blade.
The present invention includes casing, motor fixing frame, motor, wheel hub, profile of tooth trailing edge blade; Profile of tooth trailing edge blade is along circumferentially equidistantly being installed on the wheel hub; Wheel hub is connected with motor through running shaft, and motor is fixed on the motor fixing frame, and motor fixing frame is fixed in the casing.
Described profile of tooth trailing edge blade has trailing edge profile of tooth structure.
Beneficial effect of the present invention is following:
The present invention has reduced the boundary layer separation zone on the whole; And the sawtooth on the profile of tooth trailing edge blade is cut apart strong concentrated vorticity and is separated into some little whirlpools; Thereby reduced boundary layer turbulence intensity, improved the turbulent flow conditions in boundary layer, weakened blade wake passing and the purpose that reduces noise thereby reach.
Description of drawings
Fig. 1 is a scheme of installation of the present invention;
Fig. 2 is that the different acoustic pressure grades constantly of the present invention and conventional fan distribute;
Among the figure, casing 1, motor fixing frame 2, motor 3, wheel hub 4, profile of tooth trailing edge blade 5.
Embodiment
Below in conjunction with accompanying drawing the present invention is described further.
Shown in Fig. 1; A kind of profile of tooth trailing edge axial fan; Comprise casing 1, motor fixing frame 2, motor 3, wheel hub 4, profile of tooth trailing edge blade 5, profile of tooth trailing edge blade 5 is along circumferentially equidistantly being installed on the wheel hub 4, and wheel hub 4 is connected with motor 3 through running shaft; Motor 3 is fixed on the motor fixing frame 2, and motor fixing frame 2 is fixed in the casing 1.
Described profile of tooth trailing edge blade 5 has trailing edge profile of tooth structure.
When the present invention worked, gas axially got into impeller from intake grill, compared with the blade that does not have sawtooth; The trailing edge blade becomes profile of tooth trailing edge blade 5 after adding sawtooth, and the tooth root position of profile of tooth trailing edge blade 5 has changed the pressure distribution state of trailing edge vane region in advance in crown; Make the high pressure draught part of profile of tooth trailing edge blade 5 pressure side sides flow to the blade low pressure surface in advance; Cause local compression to raise, make pressure raise and the boundary layer that produces separates and is confined to the tooth root position, as shown in Figure 2; The present invention has reduced the boundary layer separation zone on the whole, weakens blade wake passing and the purpose that reduces noise thereby reach.
Claims (1)
1. a profile of tooth trailing edge axial fan comprises casing, motor fixing frame, motor, wheel hub, profile of tooth trailing edge blade, it is characterized in that:
Profile of tooth trailing edge blade is along circumferentially equidistantly being installed on the wheel hub, and wheel hub is connected with motor through running shaft, and motor is fixed on the motor fixing frame, and motor fixing frame is fixed in the casing;
Described profile of tooth trailing edge blade has trailing edge profile of tooth structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210127383XA CN102635573A (en) | 2012-04-27 | 2012-04-27 | Tooth-shaped trailing edge axial flow fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210127383XA CN102635573A (en) | 2012-04-27 | 2012-04-27 | Tooth-shaped trailing edge axial flow fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102635573A true CN102635573A (en) | 2012-08-15 |
Family
ID=46620100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210127383XA Pending CN102635573A (en) | 2012-04-27 | 2012-04-27 | Tooth-shaped trailing edge axial flow fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102635573A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103334954A (en) * | 2013-07-03 | 2013-10-02 | 浙江理工大学 | Small axial flow fan device provided with semi-cylindrical convex groove blades |
| CN104088802A (en) * | 2014-05-26 | 2014-10-08 | 浙江理工大学 | 360-degree fan with optimized pneumatic performance |
| US10900465B2 (en) | 2014-06-16 | 2021-01-26 | Brunel University London | Noise reduction to the trailing edge of fluid dynamic bodies |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200940604Y (en) * | 2006-08-07 | 2007-08-29 | 海信集团有限公司 | Axial flow fan of air conditioner |
| CN201241864Y (en) * | 2008-08-15 | 2009-05-20 | 新昌县科贸实业有限公司 | Wind impeller for fan |
| CN102022380A (en) * | 2011-01-01 | 2011-04-20 | 杭州顿力电器有限公司 | Bionic axial-flow fan |
| CN202545351U (en) * | 2012-04-27 | 2012-11-21 | 浙江理工大学 | Axial-flow fan with toothed tail edge |
-
2012
- 2012-04-27 CN CN201210127383XA patent/CN102635573A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200940604Y (en) * | 2006-08-07 | 2007-08-29 | 海信集团有限公司 | Axial flow fan of air conditioner |
| CN201241864Y (en) * | 2008-08-15 | 2009-05-20 | 新昌县科贸实业有限公司 | Wind impeller for fan |
| CN102022380A (en) * | 2011-01-01 | 2011-04-20 | 杭州顿力电器有限公司 | Bionic axial-flow fan |
| CN202545351U (en) * | 2012-04-27 | 2012-11-21 | 浙江理工大学 | Axial-flow fan with toothed tail edge |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103334954A (en) * | 2013-07-03 | 2013-10-02 | 浙江理工大学 | Small axial flow fan device provided with semi-cylindrical convex groove blades |
| CN103334954B (en) * | 2013-07-03 | 2016-02-17 | 浙江理工大学 | A kind of small axial flow fan device of blade band semi-cylindrical tongue |
| CN104088802A (en) * | 2014-05-26 | 2014-10-08 | 浙江理工大学 | 360-degree fan with optimized pneumatic performance |
| CN104088802B (en) * | 2014-05-26 | 2017-01-04 | 浙江理工大学 | A kind of 360 ° of fans of optimizing pneumatic performance |
| US10900465B2 (en) | 2014-06-16 | 2021-01-26 | Brunel University London | Noise reduction to the trailing edge of fluid dynamic bodies |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120815 |