Fan and impeller thereof
An impeller includes a hub, a plurality of blades, and an annular structure. The blades are disposed around the hub. The annular structure is connected to the blades. The annular structure includes a plurality of apertures. A balance material is filled in the apertures to achieve rotational balance of the impeller. Furthermore, a fan with the described impeller is provided. The fan and the impeller improve rotational stability, reliability and product life.
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1. Field of the Invention
The invention relates to a fan and an impeller thereof, and more particularly, to a fan and an impeller capable of stabilized rotational balance.
2. Description of the Related Art
Fans are widely utilized. A pressure difference of airflow occurs when the impeller of the fan rotates. Thus, the stabile impeller rotation is a basic requirement for all fans.
A conventional fan includes an impeller and a motor for driving the impeller. As shown in
Subsequent to assembly of the hub and motor of another conventional impeller, a remainder space is necessary to fill with balance materials in order to achieve the rotational balance of the impeller. As shown in
Balance materials can be high-viscosity material such as epoxy resin or clay. When balance material is filled in the groove by a tool, however, it is difficult to remove by the tool since of the high-viscosity characteristic of the balance materials. Thus, adjustment to achieve a rotational balance is time-consuming. Additionally, balance materials may overflow from the groove during rotation of the impeller, hindering form the rotational balance. Therefore, the impeller must be separated from the motor to adjust rotational balance.
Thus, an impeller, which is capable of easily adjusting rotational balance and reducing overflow of balance materials during rotation, is desirable.
BRIEF SUMMARY OF THE INVENTIONImpellers, improving the stability of the rotation and the reliability and lifespan of the fan, are provided.
To achieve the described purpose, an exemplary embodiment of an impeller includes a hub and a plurality of blades. The blades are disposed around the hub. An annular structure is connected to the blades. The annular structure and the hub are arranged concentrically. The annular structure has a plurality of apertures for filling in balance materials to achieve increasing balance when adjusting the rotational balance of the impeller.
To achieve the described purpose, the annular structure further includes at least one tooth in each of the apertures, the tooth can be removed by a tool to achieve decreasing balance when adjusting the rotational balance of the impeller without requiring balance materials to be filled in the apertures.
Furthermore, to achieve the described purpose, a partition between the apertures is removed by a tool to achieve decreasing balance when adjusting the rotational balance of the impeller.
Furthermore, to achieve the described purpose, the aperture has a cross-section obliquely shaped along the centrifugal direction of the hub, and thus, the balance materials do not overflow the apertures during rotation.
In summary, the annular structure of the impeller includes a plurality of apertures and a plurality of teeth therein. The teeth can be removed from the apertures. Thus, by filling balance materials to achieve increasing balance or removing the convex teeth to achieve decreasing balance when adjusting the rotational balance of the impeller is more convenient than the conventional impeller.
Thus, rotational stability, reliability, and life span of the impeller of the fan are increased.
A detailed description is given in the following embodiments with reference to the accompanying drawings.
The invention can be more fully understood by reading the subsequent detailed description and examples with references made to the accompanying drawings, wherein:
The following description is of the best-contemplated mode of carrying out the invention. This description is made for the purpose of illustrating the general principles of the invention and should not be taken in a limiting sense. The scope of the invention is best determined by reference to the appended claims.
An impeller is described with reference to the related drawings, wherein the same elements share the same references.
The position of the annular structure 26 is not limited to that shown in
The balance materials filled in the apertures 23A can be high-viscosity matter such as epoxy resin or clay.
In
In
In
Thus, when the impeller of the fan is used, rotational stability, reliability, and life span of the impeller of the fan is increased.
While the invention has been described by way of example and in terms of the preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. To the contrary, it is intended to cover various modifications and similar arrangements (as would be apparent to those skilled in the art). Therefore, the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements.
Claims
1. An impeller comprising:
- a hub;
- a plurality of blades disposed around the hub; and
- an annular structure connected to the blades,
- wherein the annular structure comprises a plurality of apertures.
2. The impeller as claimed in claim 1, wherein the annular structure and the hub are arranged concentrically.
3. The impeller as claimed in claim 1, wherein the annular structure is disposed at a periphery of blades, at the free ends of the blades, close to the hub, or at any position of the blades.
4. The impeller as claimed in claim 1, wherein the shape of the aperture is rectangular, semicircular, or other any shape.
5. The impeller as claimed in claim 1, wherein the aperture further comprises at least one tooth formed therein.
6. The impeller as claimed in claim 1, wherein the apertures are disposed at inner edge of an end surface or an outer edge of the annular structure.
7. The impeller as claimed in claim 1, wherein any two adjacent apertures comprise a partition which can be removed by a tool.
8. The impeller as claimed in claim 1, wherein the aperture has a cross section obliquely shaped along the centrifugal direction of the impeller.
9. The impeller as claimed in claim 1, further comprising a balance material filled in the aperture to achieve the rotational balance of the impeller.
10. The impeller as claimed in claim 9, wherein the balance material is epoxy resin or clay.
11. A fan comprising a motor and an impeller, the impeller comprising:
- a hub;
- a plurality of blades disposed around the hub; and
- an annular structure connected to the blades,
- wherein the annular structure comprises a plurality of apertures.
12. The fan as claimed in claim 11, wherein the annular structure and the hub are arranged concentrically.
13. The fan as claimed in claim 11, wherein the annular structure is disposed at a periphery of blades, at the free ends of the blades, close to the hub, or at any position of the blades.
14. The fan as claimed in claim 11, wherein the shape of the aperture is rectangular, semicircular, or other any shape.
15. The fan as claimed in claim 11, wherein the aperture further comprises at least one tooth formed therein.
16. The fan as claimed in claim 11, wherein each aperture is disposed at the inner edge of an end surface or an outer edge of the annular structure.
17. The fan as claimed in claim 11, wherein any two adjacent apertures comprise a partition which can be removed by a tool.
18. The fan as claimed in claim 11, wherein the aperture has a cross section obliquely shaped along the centrifugal direction of the impeller.
19. The fan as claimed in claim 11, further comprising a balance material filled in the aperture to achieve the rotational balance of the impeller.
20. The fan as claimed in claim 19, wherein the balance material is epoxy resin or clay.
Type: Application
Filed: Feb 22, 2007
Publication Date: Mar 6, 2008
Applicant:
Inventors: Chen-Mo Jiang (Taoyuan Hsien), Chung-Kai Lan (Taoyuan Hsien), Hung-Chi Chen (Taoyuan Hsien)
Application Number: 11/709,205
International Classification: F01D 5/22 (20060101);