CN211778194U - Resistance-reducing type cross-flow wind wheel - Google Patents
Resistance-reducing type cross-flow wind wheel Download PDFInfo
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- CN211778194U CN211778194U CN202020145668.6U CN202020145668U CN211778194U CN 211778194 U CN211778194 U CN 211778194U CN 202020145668 U CN202020145668 U CN 202020145668U CN 211778194 U CN211778194 U CN 211778194U
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- drag reduction
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Abstract
The utility model discloses a resistance-reducing cross-flow wind wheel, which comprises a fixed plate and fan blades on the fixed plate, wherein resistance-reducing grooves are distributed on the pressure surface of the fan blades, ridge-shaped strips are formed between the resistance-reducing grooves, and the extension directions of the resistance-reducing grooves and the ridge-shaped strips are the same as the length extension direction of the fan blades; through the design of the resistance-reducing grooves on the surfaces of the fan blades, vortices can be formed in the resistance-reducing grooves when the cross-flow wind wheel works, and the effects of lubrication and resistance reduction can be achieved.
Description
Technical Field
The utility model relates to a through-flow fan blade technical field, especially a drag reduction type through-flow wind wheel.
Background
When the cross-flow wind wheel works, airflow flows in the blade flow channel between the blades, and boundary layer separation is easily generated on the surface of the blade 200 under the action of viscous resistance, so that the effective cross-flow sectional area of the cross-flow wind wheel flow channel is reduced, the flow loss is increased, and the efficiency of the fan is reduced.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model provides a resistance-reducing type cross-flow wind wheel.
The utility model provides a technical scheme that its technical problem adopted is:
a resistance-reducing cross-flow wind wheel comprises a fixed plate and fan blades on the fixed plate, wherein resistance-reducing grooves are distributed on the pressure surface of each fan blade, ridge-shaped strips are formed among the resistance-reducing grooves, and the extension directions of the resistance-reducing grooves and the ridge-shaped strips are the same as the length extension direction of the fan blades.
As some embodiments of the utility model, drag reduction groove width is L, drag reduction groove depth is H, the interval is S between the drag reduction groove, 0.1mm is less than or equal to L H is less than or equal to 0.15mm, 0.5L is less than or equal to S is less than or equal to 1.5L. As some embodiments of the present invention, the cross section of the drag reduction groove is V-shaped or U-shaped. The utility model has the advantages that: through the design of the resistance-reducing grooves on the surfaces of the fan blades, vortices can be formed in the resistance-reducing grooves when the cross-flow wind wheel works, and the effects of lubrication and resistance reduction can be achieved.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a perspective view of the present invention;
fig. 2 is a schematic cross-sectional view of the middle blade part of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. Rather, the invention can be practiced without these specific details, i.e., those skilled in the art can more effectively describe the nature of their work to others skilled in the art using the description and illustrations herein.
Referring to fig. 1 and 2, a drag reduction type cross flow wind wheel includes a fixing plate 100 and fan blades 200 on the fixing plate 100. The fixing plate 100 may be an annular middle joint plate, or a circular end cover plate of a cross flow wind wheel. The blade shape of the fan blade 200 can refer to the existing cross-flow fan blade.
The pressure surface of the fan blade 200 is distributed with the resistance reducing grooves 300, ridge-shaped strips 400 are formed among the resistance reducing grooves 300, the extending directions of the resistance reducing grooves 300 and the ridge-shaped strips 400 are the same as the length extending direction of the fan blade 200, and a ridge-shaped structure similar to biological epidermis bionics is formed.
The cross-flow wind wheel is provided with the drag reduction groove 300, when fluid flows on the surface of the blade 200 of the cross-flow wind wheel, the leeward side of the drag reduction groove 300 forms a low-pressure area with lower static pressure, the static pressure of the windward side is higher, due to the influence of the pressure difference in the drag reduction groove 300, the drag reduction groove 300 is matched with the ridge-shaped strip 400 to generate a vortex, and the vortex has the same function as a ball bearing or lubricating oil, and when the fluid flows on the surface of the blade, the lubricating drag reduction function can be realized.
The width of the anti-drag grooves 300 is L, the depth of the anti-drag grooves 300 is H, the distance between the anti-drag grooves 300 is S, H is not less than 0.1mm and not more than 0.15mm, S is not less than 0.5L and not more than 1.5L, and the anti-drag effect of the anti-drag grooves 300 is ensured.
Embodiments of the present flow-through wind turbine are described in detail below with reference to examples, wherein "examples" as referred to herein refer to particular features, structures, or characteristics that may be included in at least one implementation of the present application:
in the embodiment 1, the length L of a cross-flow fan blade is 200mm, the chord length C of the fan blade is 30mm, the width L of a drag reduction groove is 0.15mm, the depth H of the drag reduction groove is 0.15mm, and the space S between the drag reduction grooves is 0.225 mm;
in the embodiment 2, taking the length L of a cross-flow fan blade as an example of 150mm, the chord length C of the fan blade as 20mm, the width L of each drag reduction groove as 0.12mm, the depth H of each drag reduction groove as 0.12mm, and the distance S between the drag reduction grooves as 0.120 mm;
in the embodiment 3, the length L of the cross-flow fan blade is 100mm, the chord length C of the fan blade is 10mm, the width L of the drag reduction grooves is 0.1mm, the depth H of the drag reduction grooves is 0.1mm, and the space S between the drag reduction grooves is 0.050 mm.
In actual operation, the width L and the depth H of the drag reduction groove are both within 1-2% of the chord length C of the fan blade.
The cross section of the anti-drag groove 300 is V-shaped or U-shaped, the groove is easy to process, and especially the U-shaped anti-drag groove 300 is used for being provided with an arc groove bottom, so that the anti-drag effect is better.
According to the above principle, the present invention can also make appropriate changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should fall within the protection scope of the claims of the present invention.
Claims (3)
1. The utility model provides a drag reduction type cross-flow wind wheel, includes fan blade (200) on fixed plate (100) and fixed plate (100), its characterized in that:
the anti-drag fan blade is characterized in that anti-drag grooves (300) are distributed on the pressure surface of the fan blade (200), ridge-shaped strips (400) are formed among the anti-drag grooves (300), and the extension directions of the anti-drag grooves (300) and the ridge-shaped strips (400) are the same as the length extension direction of the fan blade (200).
2. The drag reduction type cross-flow wind wheel according to claim 1, characterized in that: the width of each drag reduction groove (300) is L, the depth of each drag reduction groove (300) is H, the distance between the drag reduction grooves (300) is S, H is more than or equal to 0.1mm and less than or equal to 0.15mm, and S is more than or equal to 0.5L and less than or equal to 1.5L.
3. The drag reduction type cross-flow wind wheel according to claim 1, characterized in that: the cross section of the drag reduction groove (300) is V-shaped or U-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020145668.6U CN211778194U (en) | 2020-01-22 | 2020-01-22 | Resistance-reducing type cross-flow wind wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020145668.6U CN211778194U (en) | 2020-01-22 | 2020-01-22 | Resistance-reducing type cross-flow wind wheel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211778194U true CN211778194U (en) | 2020-10-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020145668.6U Active CN211778194U (en) | 2020-01-22 | 2020-01-22 | Resistance-reducing type cross-flow wind wheel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211778194U (en) |
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2020
- 2020-01-22 CN CN202020145668.6U patent/CN211778194U/en active Active
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