CN201330737Y - Nine-rectangle shaped blades cooling fan fin - Google Patents
Nine-rectangle shaped blades cooling fan fin Download PDFInfo
- Publication number
- CN201330737Y CN201330737Y CNU2009200666290U CN200920066629U CN201330737Y CN 201330737 Y CN201330737 Y CN 201330737Y CN U2009200666290 U CNU2009200666290 U CN U2009200666290U CN 200920066629 U CN200920066629 U CN 200920066629U CN 201330737 Y CN201330737 Y CN 201330737Y
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- Prior art keywords
- blade
- equal
- angle
- blades
- rotating shaft
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Abstract
The utility model relates to a nine-rectangle shaped blades cooling fan fin, comprising a rotating shaft base (1) and nine blades (2), the blades (2) rotate around central point of the rotating shaft base (1), a circular array is installed on the rotating shaft base (1), the blades (2) are rectangle shaped, blade inlet angle is equal to 87 DEG, blade outlet angle is equal to 93 DEG, setting angle of blade is equal to 18 DEG, air-intake edge angle is equal to 0 DEG, air-outtake edge angle is equal to 180 DEG, and scale division angle alpha is equal to 16 DEG. According to the utility model, the blade shape is designed to not interfere airflow along streamline, to eliminate generation of viewable eddy zone in turbulent current, and to minimize flow energy loss, thereby improving efficiency factor of the fan, simultaneously noise caused by high band airflow is reduced because of reduction of the whirling current.
Description
Technical field
The utility model relates to a kind of multi blade fan sheet, relates in particular to a kind of nine blade fan sheets.
Background technique
The multi blade fan sheet generally comprises shaft seat 1 as shown in Figure 1, and 1 week of shaft seat, blade 2 was made the shape of relative sense of rotation R towards front curve around arranging blade 2.Air is flowed through blade 2 again to trailing edge B along the profile of blade by leading edge leading edge A; When the shaped design of blade unreasonable, the air-flow in the blade C district is pressed blade profile and declivity dearly, although air-flow has inertia, and, the air-flow of blade D outside is spaced, and forms discontinuous mobile.This discontinuous flow causes that speed falls, and lowers efficiency because of the formation of resistance.
Summary of the invention
The purpose of this invention is to provide a kind of nine rectangular blade cooling fan sheets, agitate big, the inefficient defective of the loss of energy to solve the prior art apoplexy.
Technological scheme
The utility model provides a kind of nine rectangular blade cooling fan sheets, comprise shaft seat (1) and blade (2), described blade (2) has 9, around the central point of shaft seat (1), annular array is installed on the shaft seat (1), described blade (2) is a rectangular, 87 ° of inlet blade angles, 93 ° of blade outlet angles, 18 ° of blade angles, 0 ° of air inlet corner, 180 ° of the corners of giving vent to anger, division angle alpha=16 °.
Beneficial effect
Blade shape design of the present utility model can not interfered longshore current line airflow flowing, got rid of the generation of observable vortex in the turbulent flow, and make the energy of flow loss reduce to minimum, thereby improved the efficient of fan, the minimizing of eddy current has simultaneously also reduced the generation of the noise that causes because of the high frequency band air-flow.
Description of drawings
Fig. 1 is a multi blade fan structural representation of the prior art;
Fig. 2 is a structural representation of the present utility model.
Embodiment
Below in conjunction with specific embodiment, further set forth the utility model.Should be understood that these embodiments only to be used to the utility model is described and be not used in the restriction scope of the present utility model.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the utility model instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Embodiment 1
As shown in Figure 2, the utility model provides a kind of nine rectangular blade cooling fan sheets, comprises shaft seat 1 and blade 2, described blade 2 has 9, around the central point of shaft seat 1, annular array is installed on the shaft seat 1, and described blade 2 is a rectangular, 87 ° of inlet blade angles, 93 ° of blade outlet angles, 18 ° of blade angles, 0 ° of air inlet corner, give vent to anger 180 ° of corners, division angle alpha=16 °.
Above-mentioned division angle alpha is the outer end of leading edge A and the line of shaft seat 1 central point, with the inner of trailing edge B and the formed angle of line of shaft seat 1 central point.
Claims (1)
1. rectangular blade cooling fan sheet, comprise shaft seat (1) and blade (2), described blade (2) has 9, around the central point of shaft seat (1), annular array is installed on the shaft seat (1), it is characterized in that: described blade (2) is rectangular, 87 ° of inlet blade angles, 93 ° of blade outlet angles, 18 ° of blade angles, 0 ° of air inlet corner, 180 ° of the corners of giving vent to anger, division angle alpha=16 °.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNU2009200666290U CN201330737Y (en) | 2009-01-08 | 2009-01-08 | Nine-rectangle shaped blades cooling fan fin |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNU2009200666290U CN201330737Y (en) | 2009-01-08 | 2009-01-08 | Nine-rectangle shaped blades cooling fan fin |
Publications (1)
Publication Number | Publication Date |
---|---|
CN201330737Y true CN201330737Y (en) | 2009-10-21 |
Family
ID=41224117
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CNU2009200666290U Expired - Fee Related CN201330737Y (en) | 2009-01-08 | 2009-01-08 | Nine-rectangle shaped blades cooling fan fin |
Country Status (1)
Country | Link |
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CN (1) | CN201330737Y (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102072196A (en) * | 2011-02-28 | 2011-05-25 | 上海日用-友捷汽车电气有限公司 | Low-noise fan blade of cooling fan |
-
2009
- 2009-01-08 CN CNU2009200666290U patent/CN201330737Y/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102072196A (en) * | 2011-02-28 | 2011-05-25 | 上海日用-友捷汽车电气有限公司 | Low-noise fan blade of cooling fan |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
C17 | Cessation of patent right | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091021 Termination date: 20110108 |