CN201065853Y - Transformer fan - Google Patents
Transformer fan Download PDFInfo
- Publication number
- CN201065853Y CN201065853Y CNU2007201104319U CN200720110431U CN201065853Y CN 201065853 Y CN201065853 Y CN 201065853Y CN U2007201104319 U CNU2007201104319 U CN U2007201104319U CN 200720110431 U CN200720110431 U CN 200720110431U CN 201065853 Y CN201065853 Y CN 201065853Y
- Authority
- CN
- China
- Prior art keywords
- blade
- fan
- root
- impeller
- wheel hub
- 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 - Lifetime
Links
- 238000000465 moulding Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000009423 ventilation Methods 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- 238000003466 welding Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model relates to a fan used for a transformer, which is mainly used for cooling systems, such as an outdoor ventilation system, which comprises a motor, an impeller, a holding frame, and a mounting frame; wherein, the impeller comprises a wheel hub and a blade; the impeller, the blade and an adhered block are molded by adopting special drawing dies, the blade is designed into the shape that the root is inclined forward to the air inlet opening direction along the height in curve line regulation, and the root is swept forward to the rotation direction along the height in nonlinear regulation to form plate surface shape, and the adhered block is arranged at the root of the blade. Because the wheel hub, the blade and the adhered block all adopt thin steel plates and are molded once through the special dies, lathe turning processing is not required, therefore the even weight of the impeller is ensured, and thus the balance precision of the fan is guaranteed. The time for forming the product is reduced, and the production efficiency is improved. The blade and the wheel hub adopt firm welded connection, thus the manufacture is convenient, the cost is reduced, and the stability of the fan is enhanced, thereby the noise of the axial fan is reduced, and the fan flow rate and the pressure difference are increased.
Description
Technical field
The utility model relates to a kind of fan of transformer cooling usefulness, belongs to the outdoor ventilation cooling system.
Background technique
The transformer fan is the important component part of middle-size and small-size electric power cooling system.It will have preferable performance fitness for purpose, and promptly flow is big, and noise is little.The structural type of transformer fan is more single, generally be made up of motor, impeller, support, casing etc., but wherein the shape of the structure of impeller and profile, particularly blade but changes a lot, and it is to the aeroperformance decisive role of transformer fan.Traditional fan design method comprises that with the good wing of aeroperformance be the isolated Blade Design Method of original blade profile and based on the Design of Cascade method of two-dimensional cascade theory, last century the nineties some have appearred based on the moving blade shape construction methods of quasi-three dimensional flow.Adopt the designed transformer fan blade of said method many be plane blade, though technology is simple, poor-performing.A spot of twisted blade also is to be formed by stacking by plane cascade mostly, rather than real twisted blade based on full three-dimensional modeling design, thereby also influenced the performance of transformer fan, thereby be difficult to reach the requirement that cooling system transformer fan flow is big, noise is low.
On technology, the blade of former transformer fan and wheel hub all adopt foundry goods.What wherein blade adopted mostly is the variable cross section design method, is difficult to guarantee the weight equalization of blade like this in casting process, and the wheel hub manufacturing of former transformer fan simultaneously also is to adopt foundry goods, through the turning moulding, and the cost height, manufacturing efficiency is low.
Novel content
The utility model makes the transformer fan reach the purpose that flow is big, noise is low, the life-span is long by improving the structure of blade.
The utility model comprises motor, impeller, supporting frame, mounting bracket, impeller is made up of wheel hub and blade, the wheel hub of impeller adopts special-purpose drawing die to carry out moulding, Blade Design becomes root to lean forward by curve law to the intake grill direction along height, the root of blade along the height to the non-linear rule sweepforward of sense of rotation, become plate face type, one attachment piece is arranged at root of blade.
Because wheel hub, blade and attachment piece are all selected sheet metal for use, through the specialized mould once-through, do not need turning processing, so just guaranteed that the weight of impeller is even, thereby guaranteed the balance quality of fan.Also shorten the time of moulding product, improved manufacturing efficiency.Blade has adopted fastening welding to connect with wheel hub, is convenient to first make, reduce cost, and has second reinforced the stability of fan.Make the reduction of axial fan noise, fan flow and pressure reduction increase.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is the utility model blade wheel structure side view;
The schematic representation that connects of Fig. 3 blade and wheel hub.
Embodiment
As shown in Figure 1, the utility model belongs to the transformer axial flow fan, comprise motor 1, impeller 3, supporting frame 2, mounting bracket 4, impeller is welded by wheel hub 5 and blade 6, the wheel hub of impeller and blade adopt special-purpose drawing die to carry out moulding, and Blade Design becomes root to lean forward by curve law to the intake grill direction along height, the root of blade along height to the non-linear rule sweepforward of sense of rotation, become plate face type, one attachment piece 7 is arranged at root of blade.
Embodiment: as shown in Figure 2, when the design fan blade, select little hub ratio d (D/d)=0.45 for use, can improve the efficient of axial fan; During the blade structure design, lean forward 30 ° to the intake grill direction by curve law along height with its root, the root of blade along the height to 15 ° of the non-linear rule sweepforwards of sense of rotation, make blade constitute one lean forward, the plate face type of sweepforward, to reduce the noise of axial flow ventilating surface, increase the blast and the air quantity of fan; This sweepforward forward leaning angle is a best angle, and the performance of fan will reach best in this angle.Because the high rotating speed of fan in order to increase the intensity of blade, needs at attachment piece of root of blade welding.As shown in Figure 3, the blade of impeller and wheel hub adopt fastening welding to connect.
Claims (3)
1. transformer fan, comprise motor (1), impeller (3), supporting frame (2), mounting bracket (4), impeller is made up of wheel hub (5) and blade (6), it is characterized in that this wheel hub and blade all adopt special-purpose drawing die to carry out moulding, root of blade leans forward by curve law to the intake grill direction along height, the root of blade to the non-linear rule sweepforward of sense of rotation, becomes plate face type along height.
2. transformer fan as claimed in claim 1, the root that it is characterized in that described blade leans forward 30 ° to the intake grill direction by curve law along height, the root of blade along height to 15 ° of the non-linear rule sweepforwards of sense of rotation
3. transformer fan as claimed in claim 1 is characterized in that described root of blade has an attachment piece (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201104319U CN201065853Y (en) | 2007-05-30 | 2007-05-30 | Transformer fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201104319U CN201065853Y (en) | 2007-05-30 | 2007-05-30 | Transformer fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201065853Y true CN201065853Y (en) | 2008-05-28 |
Family
ID=39483029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201104319U Expired - Lifetime CN201065853Y (en) | 2007-05-30 | 2007-05-30 | Transformer fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201065853Y (en) |
-
2007
- 2007-05-30 CN CNU2007201104319U patent/CN201065853Y/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: ZHEJIANG ERG TECHNOLOGY CO., LTD. Free format text: FORMER NAME: ERGE SCIENCE + TECHNOLOGY CO., LTD., SANMEN |
|
| CP01 | Change in the name or title of a patent holder |
Address after: The development zone of three county of Zhejiang province in 317113 Patentee after: Zhejiang Erg Technology Co., Ltd. Address before: The development zone of three county of Zhejiang province in 317113 Patentee before: Erge Science & Technology Co., Ltd., Sanmen |
|
| C56 | Change in the name or address of the patentee |
Owner name: ZHEJIANG ERG TECHNOLOGY INC. Free format text: FORMER NAME: ZHEJIANG ERG TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: The development zone of three county of Zhejiang province in 317113 Patentee after: Zhejiang Erg Technology Inc. Address before: The development zone of three county of Zhejiang province in 317113 Patentee before: Zhejiang Erg Technology Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20080528 |
|
| CX01 | Expiry of patent term |