CN201059286Y - Medium-pressure medium-volume impeller for centrifugal type fan - Google Patents
Medium-pressure medium-volume impeller for centrifugal type fan Download PDFInfo
- Publication number
- CN201059286Y CN201059286Y CNU200720070994XU CN200720070994U CN201059286Y CN 201059286 Y CN201059286 Y CN 201059286Y CN U200720070994X U CNU200720070994X U CN U200720070994XU CN 200720070994 U CN200720070994 U CN 200720070994U CN 201059286 Y CN201059286 Y CN 201059286Y
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- China
- Prior art keywords
- plate face
- straight plate
- vane
- medium
- blade
- 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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Abstract
The utility model relates to a medium-pressure medium capacity impeller for an eccentric fan, comprising a wheel cover, vanes, a wheel disc, a shaft disc and fixing rivets. The utility model is characterized in that: each vane is provided with a straight plate face; a circular arc is arranged on one end of each vane on the shaft disc; the tangent included angle between the straight plate face of each vane and the connecting point of the straight plate face of each vane and the shaft disc is 30 DEG to 34 DEG; the tangent included angle between the straight plate face of each vane and the connecting point of the straight plate face of each vane and the shaft disc is preferably 32 DEG. The utility model has the advantages of capability of guaranteeing that the discharge coefficient Q and the total pressure coefficient P reach design values when the medium-pressure medium capacity impeller for an eccentric fan is operated, capability of improving the efficiency value of the fan, stable air stream and lowered noise.
Description
Technical field
The utility model relates to a kind of centrifugal fan impeller, flow impeller in pressing in particularly a kind of centrifugal fan.
Background technique
In centrifugal middle pressure, exist the situation of the off-design point of flow coefficient Q and coefficient of total pressure P at present in the design of flow impeller and the manufacturing, or the time for dependable flow coefficient Q and coefficient of total pressure P, the efficiency value that produces blower fan is lower, the problem that air-flow instability and noise are high, the appearance that the analysis showed that the problems referred to above is that the institute that do not match of vane type line and blade outlet angle established angle causes, therefore demand urgently inventing flow impeller in pressing in a kind of novel centrifugal fan with overcome current press in centrifugal in the deficiency of flow impeller.
Summary of the invention
The purpose of this utility model is the off-design point that solves the existing flow coefficient Q of flow impeller and coefficient of total pressure P in the middle pressure centrifugal in the prior art, thereby it is lower to produce efficiency value, the problem that air-flow instability and noise are high, provide in a kind of centrifugal fan press in the flow impeller.Flow impeller during the utility model designs and presses in a kind of centrifugal fan, comprise wheel cap, blade, wheel disc, reel, fixing rivet, it is characterized in that: blade is straight plate face, blade has a circular arc at an end that is positioned at the reel place, and the angle of the straight plate face of blade and the tangent line at reel tie point place is 30-34 °.The angle of the straight plate face of blade and the tangent line at reel tie point place is 32 °.The utility model has the advantages that make press in can centrifugal fan in flow impeller dependable flow coefficient Q and coefficient of total pressure P when work reach design load, the efficiency value of blower fan is improved, steady air current and noise reduce.
Description of drawings
Accompanying drawing 1 is a side generalized section of the present utility model, and accompanying drawing 2 is a structure front schematic view of the present utility model,
Below in conjunction with drawings and Examples the utility model is elaborated,
Embodiment
The flow coefficient Q of flow impeller is 0.050-0.150 in middle the pressure, coefficient of total pressure P is 0.610-0.410, the standard of pressing dimensionless number coefficient and fan impeller diameter priority number according to flow impeller in the middle pressure in the centrifugal fan, be converted to the impeller diameter of standard fan, blade 2 outlet end angles, the inlet end established angle designed according to Optimum Welding, the angle of designing the tangent line at blade 2 straight plate faces and reel 4 tie point places is 32 °, adopting blade is the design that straight plate face adds the upper inlet circular arc, makes impeller have middle pressure, middle flow, advantage efficiently.
Claims (2)
1. flow impeller in pressing in the centrifugal fan, comprise wheel cap, blade, wheel disc, reel, fixing rivet, it is characterized in that: blade is straight plate face, and blade has a circular arc at an end that is positioned at the reel place, and the angle of the straight plate face of blade and the tangent line at reel tie point place is 30-34 °.
2. by flow impeller in pressing in the described a kind of centrifugal fan of claim 1, it is characterized in that: the angle of the straight plate face of blade and the tangent line at reel tie point place is 32 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720070994XU CN201059286Y (en) | 2007-06-12 | 2007-06-12 | Medium-pressure medium-volume impeller for centrifugal type fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720070994XU CN201059286Y (en) | 2007-06-12 | 2007-06-12 | Medium-pressure medium-volume impeller for centrifugal type fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201059286Y true CN201059286Y (en) | 2008-05-14 |
Family
ID=39407756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720070994XU Expired - Fee Related CN201059286Y (en) | 2007-06-12 | 2007-06-12 | Medium-pressure medium-volume impeller for centrifugal type fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201059286Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101709719B (en) * | 2009-11-17 | 2011-07-20 | 张玉 | Impeller and draught fan thereof, and waste separation crusher with same |
-
2007
- 2007-06-12 CN CNU200720070994XU patent/CN201059286Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101709719B (en) * | 2009-11-17 | 2011-07-20 | 张玉 | Impeller and draught fan thereof, and waste separation crusher with same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shanghai Dehui laser cutting processing Co., Ltd. Assignor: Shanghai General Fan Co., Ltd. Contract fulfillment period: 2008.7.1 to 2011.6.30 Contract record no.: 2009310000128 Denomination of utility model: Medium-pressure medium-volume impeller for centrifugal type fan Granted publication date: 20080514 License type: Exclusive license Record date: 20090715 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.7.1 TO 2011.6.30; CHANGE OF CONTRACT Name of requester: SHANGHAI DEHUI LASER PROCESSING CO., LTD. Effective date: 20090715 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080514 Termination date: 20120612 |