CN212360302U - Guide vane of axial flow fan and axial flow fan - Google Patents
Guide vane of axial flow fan and axial flow fan Download PDFInfo
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- CN212360302U CN212360302U CN201922453913.XU CN201922453913U CN212360302U CN 212360302 U CN212360302 U CN 212360302U CN 201922453913 U CN201922453913 U CN 201922453913U CN 212360302 U CN212360302 U CN 212360302U
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- guide vane
- blade
- splitter
- vane
- main part
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Abstract
The utility model discloses an axial fan and guide vane thereof, guide vane includes guide vane main part and splitter blade, the guide vane main part with splitter blade's shape is NACA65 wing type, splitter blade is located the blade root department of guide vane main part and is connected with axial fan's impeller wheel hub, splitter blade is on a parallel with the guide vane main part, splitter blade's chord length does 50% of the chord length of guide vane main part, splitter blade's blade height does 2.5% of the blade height of guide vane main part. The utility model discloses a set up a splitter blade that is on a parallel with the guide vane main part between the guide vane main part, utilize splitter blade to weaken the production of secondary flow, reduce the piling up of air current in the contained angle department of blade trailing edge and wheel hub wall, finally reached the purpose that reduces guide vane and total pressure loss.
Description
Technical Field
The utility model relates to a mechanical structure technical field, in particular to axial fan's guide vane and axial fan.
Background
Axial fans generally consist of a casing, a motor, an impeller and guide vanes. The guide vanes are typically located at the rear of the impeller, radially distributed along the circumference of the impeller hub. In the use process of the axial flow fan, the guide vane has the function of rotating the deflection airflow generated by the rotation of the impeller back to the axial direction so as to achieve the purpose of improving the working efficiency of the axial flow fan.
As shown in fig. 1 and 2, a conventional guide vane is a single vane, and an airflow passing through the guide vane generates a strong secondary flow, which not only generates a secondary flow loss, but also causes the airflow to be accumulated at an included angle between a trailing edge of the vane and a wall surface of a hub, thereby generating a large total pressure loss and affecting the working efficiency of an axial flow fan.
Thus, the prior art has yet to be improved and enhanced.
SUMMERY OF THE UTILITY MODEL
In view of the foregoing disadvantages of the prior art, the object of the present invention is to provide an axial fan and a guide vane thereof, which can solve the problem of excessive pressure loss caused by the generation of a strong secondary flow in the prior art.
In order to achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides an axial fan's guide vane, connects in axial fan's impeller hub, includes guide vane main part and splitter blade, the guide vane main part with splitter blade's shape is NACA65 airfoil, splitter blade is located the blade root department of guide vane main part and is connected with axial fan's impeller hub, splitter blade is on a parallel with the guide vane main part, splitter blade's chord length is 50% of guide vane main part's chord length, splitter blade's blade height is 2.5% of guide vane main part's blade height.
Preferably, in the guide vane of the axial flow fan, the chord length of the guide vane main body is 100 mm.
Preferably, in the guide vane of the axial flow fan, the chord length of the splitter vane is 50 mm.
Preferably, in the guide vane of the axial flow fan, the vane height of the guide vane main body is 200 mm.
Preferably, in the guide vane of the axial flow fan, the height of the splitter vane is 5 mm.
Preferably, in the guide vane of the axial flow fan, the distance between the splitter vane and the guide vane main body is 20 mm.
An axial fan comprises a plurality of guide vanes of the axial fan.
Preferably, in the axial flow fan, the grid pitch between two adjacent guide vane main bodies is 100 mm.
Preferably, in the axial flow fan, a blade installation angle of the guide vane main body is 20 °.
Preferably, in the axial flow fan, a blade installation angle of the splitter blade is 28 °.
Compared with the prior art, the utility model provides an axial fan and guide vane thereof, guide vane includes guide vane main part and splitter blade, the guide vane main part with splitter blade's shape is NACA65 wing type, splitter blade is located the blade root department of guide vane main part is connected with axial fan's impeller hub, splitter blade is on a parallel with the guide vane main part, splitter blade's chord length does 50% of the chord length of guide vane main part, splitter blade's blade height does 2.5% of the blade height of guide vane main part. The utility model discloses a set up a splitter blade that is on a parallel with guide vane between the guide vane main part, utilize splitter blade to weaken the production of secondary flow, reduce the piling up of air current in the contained angle department of blade trailing edge and wheel hub wall, finally reached the purpose that reduces guide vane total pressure loss.
Drawings
FIG. 1 is a schematic cross-sectional view of a prior art guide vane for an axial flow fan;
FIG. 2 is a schematic view of a prior art guide vane of an axial flow fan;
fig. 3 is a schematic cross-sectional view of a preferred embodiment of a guide vane of an axial flow fan according to the present invention;
fig. 4 is a schematic view illustrating an expansion of a preferred embodiment of a guide vane of an axial flow fan according to the present invention;
fig. 5 is a schematic diagram showing a comparison of total pressure loss coefficients of a guide vane with a splitter vane and a conventional guide vane.
Detailed Description
The utility model provides an axial fan and guide vane thereof, for making the utility model discloses a purpose, technical scheme and effect are clearer, clear and definite, and it is right that the embodiment is lifted to follow with reference to the attached drawing the utility model discloses further detailed description. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
It will be understood that when an element is referred to as being "on," "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.
It should be noted that the terms of orientation such as left, right, up and down in the embodiments of the present invention are only relative to each other or are referred to the normal use state of the product, and should not be considered as limiting.
Referring to fig. 3 and 4, the guide vane of the axial flow fan provided by the present invention is connected to an impeller hub (not shown in the figure) of the axial flow fan, and includes a guide vane main body 1 and a splitter vane 2, where the guide vane main body 1 and the splitter vane 2 are both in the shape of an NACA65 airfoil, the splitter vane 2 is located at a blade root of the guide vane main body 1 and connected to the impeller hub of the axial flow fan, the splitter vane 2 is parallel to the guide vane main body 1, a chord length of the splitter vane 2 is 50% of a chord length of the guide vane main body 1, and a blade height of the splitter vane 2 is 2.5% of a blade height of the guide vane main body 1.
Particularly, the utility model discloses set up a reposition of redundant personnel blade 2 that is on a parallel with guide vane main part 1 between the guide vane main part, utilize reposition of redundant personnel blade 2 to weaken the production of secondary flow, reduce the piling up of air current in the contained angle department of blade trailing edge and wheel hub wall, finally reached the purpose that reduces guide vane total pressure loss, in addition, through with guide vane main part 1 and reposition of redundant personnel blade 2 all set up to NACA65 wing type, can reach the optimal secondary flow effect that weakens.
Further, the utility model discloses simulate according to a large amount of emulation numerical values, obtain and set up the chord length of reposition of redundant personnel blade 2 into 50% of the chord length of guide vane main part 1, will the blade height of reposition of redundant personnel blade 2 sets up into 2.5% of the blade height of guide vane main part 1, guide vane's total pressure loss is minimum to the optimum position and the optimum size of reposition of redundant personnel blade 2 have been determined.
In a preferred embodiment, please refer to fig. 3, which is a schematic cross-sectional view of a guide vane with a splitter vane in an example of the present invention, wherein the guide vane main body 1 is an airfoil type of NACA65, and the chord length L thereof is 100 mm. A splitter blade 2 parallel to the guide vane main body 1 is arranged between the axial distances of the guide vane main body 1, the splitter blade 2 is an NACA65 airfoil, the chord length L1 of the splitter blade is 50mm, and the distance h between the splitter blade and the guide vane is 20 mm. Please continue to refer to fig. 4, which is a schematic view of the cross section of the guide vane with splitter vane in the verification example of the present invention, wherein the height h of the guide vane body 1 is 200mm, the height h1 of the splitter vane 2 is 5mm, and the splitter vane 2 is located at the root of the guide vane body 1 and connected to the hub.
Fig. 5 is a schematic diagram showing a comparison of the total pressure loss coefficients of the prior art guide vane (without splitter vane) and the guide vane with splitter vane provided in the present embodiment. The total pressure loss coefficient in the figure is a result of numerical simulation performed under the conditions of a reynolds number of 200000 and an incident angle of 26 ° to 41 °. The result shows that the total pressure loss coefficient (2Y in figure 5) of the guide vane with the splitter vane is reduced by about 4 percent compared with the total pressure loss coefficient of the existing guide vane (without the splitter vane), so the utility model discloses reduce the production of secondary flow, reduce the secondary flow loss.
Based on above-mentioned axial fan's guide vane, the utility model discloses still corresponding provide an axial fan, include as above-mentioned embodiment axial fan's guide vane, it is preferred, guide vane's quantity is 5 to 9, adjacent two grid distance d between the guide vane main part 1 is 100mm, guide vane main part 1's angle of erection alpha is 20, splitter vane's blade angle of erection alpha is 28, can see out from figure 5 the utility model discloses reduce secondary flow's production, reduced the secondary flow loss.
To sum up, the utility model provides an among axial fan and guide vane thereof, guide vane includes guide vane main part and splitter blade, the guide vane main part with splitter blade's shape is NACA65 wing type, splitter blade is located the blade root department of guide vane main part is connected with axial fan's impeller hub, splitter blade is on a parallel with the guide vane main part, splitter blade's chord length does 50% of the chord length of guide vane main part, splitter blade's blade height does 2.5% of the blade height of guide vane main part. The utility model discloses a set up a splitter blade that is on a parallel with guide vane between the guide vane main part, utilize splitter blade to weaken the production of secondary flow, reduce the piling up of air current in the contained angle department of blade trailing edge and wheel hub wall, finally reached the purpose that reduces guide vane total pressure loss.
It should be understood that equivalent alterations and modifications can be made by those skilled in the art according to the technical solution of the present invention and the inventive concept thereof, and all such alterations and modifications should fall within the scope of the appended claims.
Claims (9)
1. The guide vane of the axial flow fan is connected to an impeller hub of the axial flow fan, and is characterized by comprising a guide vane main body and a splitter vane, wherein the guide vane main body and the splitter vane are both NACA65 airfoils, the splitter vane is positioned at a vane root of the guide vane main body and is connected with the impeller hub of the axial flow fan, the splitter vane is parallel to the guide vane main body, the chord length of the splitter vane is 50% of the chord length of the guide vane main body, and the vane height of the splitter vane is 2.5% of the vane height of the guide vane main body;
the distance between the splitter blade and the guide vane main body is 20 mm.
2. The guide vane of an axial flow fan according to claim 1, wherein a chord length of the guide vane body is 100 mm.
3. The guide vane of an axial flow fan according to claim 2, wherein the chord length of the splitter vane is 50 mm.
4. The guide vane of an axial flow fan according to claim 1, wherein the vane height of the guide vane body is 200 mm.
5. The guide vane of an axial flow fan according to claim 4, wherein the blade height of the splitter blade is 5 mm.
6. An axial fan comprising a plurality of guide vanes of the axial fan according to any one of claims 1 to 5.
7. The axial flow fan according to claim 6, wherein a pitch between adjacent two of the guide vane bodies is 100 mm.
8. The axial flow fan of claim 6, wherein a blade installation angle of the guide vane body is 20 °.
9. The axial fan of claim 6, wherein a blade mount angle of the splitter blade is 28 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922453913.XU CN212360302U (en) | 2019-12-30 | 2019-12-30 | Guide vane of axial flow fan and axial flow fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922453913.XU CN212360302U (en) | 2019-12-30 | 2019-12-30 | Guide vane of axial flow fan and axial flow fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212360302U true CN212360302U (en) | 2021-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922453913.XU Expired - Fee Related CN212360302U (en) | 2019-12-30 | 2019-12-30 | Guide vane of axial flow fan and axial flow fan |
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| CN (1) | CN212360302U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113653672A (en) * | 2021-08-31 | 2021-11-16 | 佛山市南海九洲普惠风机有限公司 | Axial flow impeller with splitter blades |
-
2019
- 2019-12-30 CN CN201922453913.XU patent/CN212360302U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113653672A (en) * | 2021-08-31 | 2021-11-16 | 佛山市南海九洲普惠风机有限公司 | Axial flow impeller with splitter blades |
| CN113653672B (en) * | 2021-08-31 | 2023-11-10 | 佛山市南海九洲普惠风机有限公司 | Axial flow impeller with splitter blades |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210115 Termination date: 20211230 |