CN203404130U - Cooling fan for transformer - Google Patents
Cooling fan for transformer Download PDFInfo
- Publication number
- CN203404130U CN203404130U CN201320423045.0U CN201320423045U CN203404130U CN 203404130 U CN203404130 U CN 203404130U CN 201320423045 U CN201320423045 U CN 201320423045U CN 203404130 U CN203404130 U CN 203404130U
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- blade
- fan
- protruding grain
- protruding
- transformer
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Abstract
The utility model discloses a cooling fan for a transformer. The cooling fan for the transformer comprises an air duct, a motor arranged in the air duct, and an impeller, wherein the impeller comprises a hub connected with a motor shaft, a plurality of blades and blade handles corresponding to the blades, the included angle between each blade and the motor shaft is 15-20 degrees, and a plurality of protruding particles are arranged on the second long side edge of the windward face of each blade. Due to the facts that the included angle between each blade and the motor shaft is changed, and the protruding particles which can reduce the frequency of the phenomenon of turbulent flow of air flow generated in the process of operation of the fan blades is additionally arranged, noise of the cooling fan is effectively reduced, the design of the whole cooling fan can be more reasonable, the additional counter weight of the cooling fan is not needed, and the purpose of the counter weight can be completely achieved through changes of the size of each protruding particle.
Description
Technical field
The utility model relates to fan, more particularly, relates to a kind of fan for cooling transformer.
Background technique
At present, traditional fan for cooling transformer mainly consists of blade, wheel hub and drive motor three parts, and by the torsion angle at blade edge place and blade inner edge place, or the torsion on root of blade and leaf top reaches the object that reduces fan noise.For example, the Chinese patent that application number is 99251044.9, discloses a kind of cooling fan for super-low noise transformer, and it utilizes the 18 degree distortions on root of blade and leaf top to reach the object that reduces noise.In addition, the Chinese patent that application number is 91215004.1, discloses a kind of fan for cooling transformer, and this fan is to utilize the torsion angle at 35～40 °, blade edge place and blade inner edge place to reach the object that reduces noise.
Current dry-type transformer and high-power transformer are all equipped with cooling fan, in order to reach the object that reduces transformer temperature.Raising along with people's living standard, the performance of transformer and noise are required also to improve constantly, cooling fan as the important parts of transformer, the height of its noise level is directly connected to the noise situation of whole transformer, therefore more and more stricter to the requirement of transformer fan noise, there is the development trend of low noise in transformer fan.For this reason, need to design a kind of new fan for cooling transformer, further reduce the overall noise of fan.
Model utility content
For the above-mentioned shortcoming existing in prior art, the purpose of this utility model is to provide a kind of fan for cooling transformer, the air-flow flow-disturbing producing in the time of can reducing flabellum running, and then reduce flow-disturbing noise, thus reduce fan overall noise.
For achieving the above object, the utility model adopts following technological scheme:
This fan for cooling transformer, comprise air duct, be located at motor and impeller in air duct, impeller comprises wheel hub and several blade and the corresponding petiole being connected with motor shaft, described blade becomes respectively the angle of 15～20 ° with motor shaft, and on the second long side of the windward side of each blade, is respectively equipped with several protruding grains.
The protruding grain of each described blade is three, be respectively apart from wheel hub the first protruding grain, the second protruding grain and the 3rd protruding grain from far near, wherein, the 3rd protruding grain closes on blade end, between the 1/8～1/4, second protruding grain that between the first protruding grain and the second protruding grain, distance is length of blade and the 3rd protruding, distance is length of blade 1/2～2/3.
Described blade interior is hollow-core construction, and is provided with stiffening rib.
Described blade interior is also filled with polyurethane foam glue.
Described petiole is a Cast Steel, and one end is inserted blade and fixed by rivet, and the other end is connected with wheel hub by screw thread.
In technique scheme, fan for cooling transformer of the present utility model comprises air duct, is located at motor and impeller in air duct, impeller comprises wheel hub and several blade and the corresponding petiole being connected with motor shaft, blade becomes respectively the angle of 15～20 ° with motor shaft, and on the second long side of the windward side of each blade, is respectively equipped with several protruding grains.By changing the angle of blade and motor shaft, and the protruding grain of setting up the air-flow flow-disturbing that produces in the time of can reducing flabellum running, thereby effectively lower the noise of cooling fan, and make whole fan design more reasonable, can to fan, carry out counterweight in addition, can complete by the size of protruding grain the object of counterweight completely.
Accompanying drawing explanation
Fig. 1 is the cross-sectional schematic of fan for cooling transformer of the present utility model;
Fig. 2 is the structural representation of impeller of the present utility model;
Fig. 3 is the structural representation of individual blade of the present utility model;
Fig. 4 is the cross-sectional schematic of individual blade of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, further illustrate the technical solution of the utility model.
Refer to shown in Fig. 1～Fig. 2, what fan for cooling transformer of the present utility model was same as the prior art is, equally also comprise air duct 1, be located at motor 2 and impeller 3 in air duct 1, impeller 3 comprises wheel hub 31 and several blade 32 and the corresponding petiole 33 being connected with motor 2 axles.Different, described blade 32 becomes the angle of 15～20 ° with motor 2 axles respectively, and on the second long side of the windward side of each blade 32 (being shorter one side in two sides of blade), is respectively equipped with several protruding grains 34.As an embodiment, blade 32 quantity in Fig. 2 are four, the protruding grain 34 of each described blade 32 is three, be respectively apart from the wheel hub 31 protruding grain 34 of the protruding grain the 34 and the 3rd of the first protruding grain 34, second from far near, wherein, the 3rd protruding grain 34 closes on blade 32 ends, and between the protruding grain 34 of the first protruding grain 34 and second, distance is that between protruding 34 of 1/8～1/4, the second protruding grain the 34 and the 3rd of blade 32 length, distance is 1/2～2/3 of blade 32 length.When motor 2 running, wind blows to the process of outlet side from fan inlet side, by the setting of above-mentioned blade 32 angles and protruding grain 34, and the air-flow flow-disturbing producing in the time of can reducing flabellum running, and then reduce flow-disturbing noise, thereby reach the object that reduces fan overall noise.
Shown in Fig. 3, Fig. 4, in addition, described blade 32 inside are hollow-core construction, and are provided with stiffening rib 35, play the effect of reinforcing structure, and described blade 32 inside are also filled with polyurethane foam glue 36.Described petiole 33 is a Cast Steel, and blade 32 fixing by rivet 37 is inserted in one end, and the other end is connected with wheel hub 31 by screw thread 38.
Adopt fan for cooling transformer of the present utility model, have the following advantages:
1) noise is lower, and the air-flow flow-disturbing producing in the time of can effectively reducing flabellum running by arranging of fan blade angles and protruding grain 34, can reduce flow-disturbing noise, thereby fan overall noise is reduced.
2) design is more reasonable, by using cleverly fan blade angles and protruding grain 34, makes whole transformer fan design more reasonable, can to transformer fan, carry out counterweight in addition, can complete by the size of protruding grain 34 object of counterweight completely.
Those of ordinary skill in the art will be appreciated that, above embodiment is only for the utility model is described, and be not used as restriction of the present utility model, as long as within the scope of connotation of the present utility model, to the above embodiment's variation, modification, all will drop within the scope of claims of the present utility model.
Claims (5)
1. a fan for cooling transformer, comprises air duct, is located at motor and impeller in air duct, and impeller comprises wheel hub and several blade and the corresponding petiole being connected with motor shaft, it is characterized in that:
Described blade becomes respectively the angle of 15～20 ° with motor shaft, and on the second long side of the windward side of each blade, is respectively equipped with several protruding grains.
2. fan for cooling transformer as claimed in claim 1, is characterized in that:
The protruding grain of each described blade is three, be respectively apart from wheel hub the first protruding grain, the second protruding grain and the 3rd protruding grain from far near, wherein, the 3rd protruding grain closes on blade end, between the 1/8～1/4, second protruding grain that between the first protruding grain and the second protruding grain, distance is length of blade and the 3rd protruding, distance is length of blade 1/2～2/3.
3. fan for cooling transformer as claimed in claim 1, is characterized in that:
Described blade interior is hollow-core construction, and is provided with stiffening rib.
4. fan for cooling transformer as claimed in claim 3, is characterized in that:
Described blade interior is also filled with polyurethane foam glue.
5. fan for cooling transformer as claimed in claim 1, is characterized in that:
Described petiole is a Cast Steel, and one end is inserted blade and fixed by rivet, and the other end is connected with wheel hub by screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320423045.0U CN203404130U (en) | 2013-07-16 | 2013-07-16 | Cooling fan for transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320423045.0U CN203404130U (en) | 2013-07-16 | 2013-07-16 | Cooling fan for transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203404130U true CN203404130U (en) | 2014-01-22 |
Family
ID=49940068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320423045.0U Expired - Lifetime CN203404130U (en) | 2013-07-16 | 2013-07-16 | Cooling fan for transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203404130U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104895837A (en) * | 2015-04-29 | 2015-09-09 | 安庆市紫韵电子商务有限公司 | Fan of asynchronous motor |
-
2013
- 2013-07-16 CN CN201320423045.0U patent/CN203404130U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104895837A (en) * | 2015-04-29 | 2015-09-09 | 安庆市紫韵电子商务有限公司 | Fan of asynchronous motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140122 |
|
| CX01 | Expiry of patent term |