CN202707612U - Axial-flow fan blade - Google Patents
Axial-flow fan blade Download PDFInfo
- Publication number
- CN202707612U CN202707612U CN 201220378836 CN201220378836U CN202707612U CN 202707612 U CN202707612 U CN 202707612U CN 201220378836 CN201220378836 CN 201220378836 CN 201220378836 U CN201220378836 U CN 201220378836U CN 202707612 U CN202707612 U CN 202707612U
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- Prior art keywords
- blade
- flanging
- axial
- flow leaf
- radius
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Abstract
The utility model discloses an axial-flow fan blade, which comprises a hub and a blade, wherein the blade is connected onto the hub; two surfaces of the blade are respectively a pressure surface at an air outlet side and a suction surface at an air inlet side; a radial outward edge position of the blade is an outer edge; the outer edge of the blade is provided with a plurality of hems; and the directions of the hems face the suction surface from the pressure surface. A sectional hem is arranged on the outer edge of the blade; and a sunken area is arranged on the front edge of the blade. The flowage way that an air flow flows through the outer edge and the front edge of the blade is changed, so that the leakage of air on the outer edge of the blade is decreased; the drop way of a vortex on the front edge of the blade can be also improved; the efficiency of a fan is improved; and the vortex noise (wideband noise) of the fan blade is reduced.
Description
Technical field
The utility model relates to a kind of fan blade, especially a kind of axial-flow leaf.
Background technique
In air conditioner outdoor machine or other air interchanger, usually adopt various axial-flow leafs for realizing that air circulation flows, the basic structure of existing main flow fan blade is to form as the wheel hub of running shaft with at a plurality of blades that this maincenter periphery is radial arrangement, rotate by motor driving, air flows into from the leading edge of blade, hinder marginal part from blade after blade is boosted blows out, thereby has formed pressure side and suction surface; Existing axial-flow leaf is in operation process; often can produce low pressure area in the leaf top of suction surface intermediate portion zone; be eddy current, this eddy current mainly is to be caused through the low pressure area that the pressure side zone of high pressure of fan blade flows to suction surface by air-flow, and this phenomenon is called as " leakage ".In addition, near the suction surface leading edge of blade, boundary layer separation can occur, cause eddy current to produce.In a word, above-mentioned two situations all can cause the eddy current crack (broadband noise) of fan blade, and then cause the fan noise total value to raise, and have affected the overall performance of air conditioner.
The model utility content
For overcoming the deficiencies in the prior art, the utility model provides a kind of axial-flow leaf reasonable in design, and the utility model realizes that the technological scheme that above-mentioned purpose adopts is:
A kind of axial-flow leaf, comprise wheel hub and the blade that is connected on the described wheel hub, the two sides of described blade is respectively the pressure side of air side and the suction surface of inlet side, the radially outer edge of described blade is outer rim, the outer rim of described blade is provided with the multistage flanging, described flanging direction by described pressure side towards described suction surface.
More preferably, the arc length of arbitrary section described flanging is 0.1～0.75 with the ratio of the arc length of described blade outer rim.
More preferably, the outer rim of described blade is provided with two sections flangings, and the first paragraph flanging is arranged on the position near blade inlet edge, and the second segment flanging is arranged on the position near trailing edge.
More preferably, the bending angle of described first paragraph flanging is θ
1, 60 °≤θ
1≤ 120 °, the bending angle of described second segment flanging is θ
2, 90 °≤θ
2＜180 °.
More preferably, the bending angle θ of described first paragraph flanging
1Bending angle θ less than described second segment flanging
2
More preferably, the bending angle θ of described first paragraph flanging
1Be 85 °～95 °, the bending angle θ of described second segment flanging
2It is 130 °～140 °.
More preferably, the ratio of the maximum value of the height of every section described flanging on the described blade vane thickness corresponding with its position is 0.5～4.5.
More preferably, the outer rim of described blade is provided with two sections flangings, and the height maximum value of every section described flanging on described blade is not identical.
More preferably, described first paragraph flanging is in the maximum value of the height on the blade maximum value greater than the height of described second segment flanging on blade.
More preferably, the start radius R2's of the radius R 1 of described fan blade and the starting point of arbitrary section described flanging is poor, with the ratio of the radius R 1 of described fan blade be 0.025～0.1, i.e. 0.025≤(R1-R2)/R1≤0.1.
More preferably, the changes shape of every section described flanging height is recessed shape, convex shaped or lineal shape.
More preferably, also be provided with the depressed area to described pressure side direction depression from described suction surface near the leading edge of described blade or the leading edge.
More preferably, the cup depth of described depressed area is 0.5～1.5 with the ratio of the maximum ga(u)ge of the blade of position, described depressed area.
More preferably, the ratio of the wing chord length of the width of described depressed area maximum and described blade is 0.05～0.25.
More preferably, the ratio of the maximum radius at place, described depressed area and described fan blade radius is 0.5～1.0;
The least radius at place, described depressed area and the ratio of described fan blade radius are 0.29～0.5.
The leading edge that segmentation flanging, blade are set in the outer rim of blade arranges the depressed area, the outer rim of airflow passes blade, the type of flow of leading edge have been changed, thereby reduce air in " leakage " at the outer rim place of blade, improve near coming off of the whirlpool leading edge suction face, improve the efficient of blower fan, reduced fan blade eddy current crack (broadband noise).
Description of drawings
One embodiment's of Fig. 1 axial-flow leaf of the present invention schematic perspective view;
Fig. 2 is axial-flow leaf schematic top plan view shown in Figure 1;
Fig. 3 is that axial-flow leaf master shown in Figure 2 looks schematic representation;
Fig. 4 is the individual blade schematic representation of axial-flow leaf shown in Figure 2;
Fig. 5 is the flanging schematic representation of individual blade shown in Figure 4;
Fig. 6 is the groove location schematic representation of individual blade shown in Figure 4;
Fig. 7 is the flanging shape schematic representation of individual blade shown in Figure 4;
Fig. 8 is individual blade partial enlarged drawing shown in Figure 4;
Fig. 9 is the schematic top plan view of individual blade shown in Figure 4;
Figure 10 is individual blade H-H face sectional view shown in Figure 9;
Figure 11 is the individual blade H-H face sectional view with the chord length mark shown in Figure 9; Wherein,
1 wheel hub; 2 blades; 3 depressed areas; 4 flangings.
Embodiment
In order to make the purpose of this utility model, technological scheme and advantage clearer, below in conjunction with drawings and Examples, axial-flow leaf of the present utility model is further elaborated.
At first the blade of axial-flow leaf described, blade is leading edge towards the edge of its sense of rotation, the edge that deviates from its sense of rotation is trailing edge, and the radially outer edge of blade is outer rim, and the two sides of blade is respectively the pressure side of air side and the suction surface of inlet side.
Referring to figs. 1 through Figure 11, axial-flow leaf of the present utility model, comprise wheel hub 1, axial distribution has a plurality of blades 2 on the wheel hub 1, each blade 2 shape is identical, and take the rotating center of axial-flow leaf as the axle center, be equidistant or the unequal-interval distribution, the two sides of blade 2 is respectively pressure side T and suction surface S, the outer rim of blade 2 arranges multistage flanging 4, the flanging direction of flanging 4 to described suction surface, also is provided with the depressed area 3 to described pressure side depression from described suction surface by described pressure side near the leading edge of blade 4 or the leading edge.
The quantity of the flanging 4 on the blade 2 is four sections, is respectively AB section, BC section, CD section and DE section, and as shown in Figure 4, the arc length of the arbitrary flanging 4 in four sections flangings 4 is 0.1～0.75 with the ratio of the arc length of AE, for example,
Or
When B, C and 3 coincidences of D, the quantity of flanging 4 becomes two sections, is respectively AB section and BE section, and wherein the AB section is the first paragraph flanging, and the BE section is the second segment flanging; AB section flanging is near the position of the leading edge of blade 2, and BE section flanging is near the position of the trailing edge of blade 2.
As shown in Figure 5, wherein the ratio of the arc length of AB section flanging 4 and the arc length between the AE still is 0.1～0.75, namely
Similarly,
The difference of the radius of described axial-flow leaf and the start radius of arbitrary described flanging is 0.025～0.1 with the ratio of the radius of described axial-flow leaf, and as shown in Figure 6, the starting point of second segment flanging (BE) section is the E point, and the start radius that E is ordered is R
2, the radius of axial-flow leaf is R
1, the external diameter of wheel hub 1 is R
0, R wherein
2With R
1Meet the following conditions:
（R
1-R
2）/R
1∈[0.025,0.1]；
Similarly, the start radius at the starting point A place of the radius of described axial-flow leaf and first paragraph flanging (AE section) poor, with the ratio of the radius of described axial-flow leaf also be 0.025～0.1.
The ratio of the vane thickness that the height maximum value of every section described flanging on described blade is corresponding with its position is 0.5～4.5.As shown in Figure 7, the maximum value of the height of flanging 4 on blade 2 of AB section is h
1, maximum height value h
1The vane thickness h that the position is corresponding, then h
1/ h ∈ [0.5,4.5]; The maximum value of BE section flanging 4 height on blade 2 is h
2, maximum height value h
2The vane thickness h that the position is corresponding, then h
2/ h ∈ [0.5,4.5];
Bending angle is the angle between the suction surface at the plane at flanging place and blade outer rim place, and as shown in Figure 8, the flanging angle of the flanging 4 of AB section is θ
1, θ
1Angular range be θ
1∈ [60 °, 120 °], preferred 85 °～95 °, the height of the flanging 4 of AB section is reduced gradually by A to B, and the changes shape of flanging height is recessed shape L1, convex shaped L3 or lineal shape L2;
The folding line of BE section flanging is MN, flanging angle θ
2, wherein, θ
2＞θ
1, θ
2Angular range be θ
2∈ [90 °, 180 °), preferred 130 °～140 °, the height of BE section flanging 4 is increased gradually by B to E;
Wherein, the height maximum value of every section described flanging on described blade is all not identical, be the maximum height that the maximum height of AB section flanging is not equal to BE section flanging, preferred, AB section flanging is in the maximum value of the height on the blade 2 maximum value greater than the height of BE section flanging on blade 2.
To shown in Figure 11, be provided with the depressed area 3 to described pressure side direction depression from described suction surface such as Fig. 9 near the leading edge of blade 2 or the leading edge, the degree of depth of depressed area 3 is h
3, the maximum ga(u)ge of the blade 2 of 3 positions, depressed area is h
4(not shown), h
3With h
4Satisfy condition and be h
3/ h
4∈ [0.5,1.5];
The Extreme breadth of depressed area 3 is W, and the aerofoil profile chord length of blade 2 is L, then needs W/L ∈ [0.05,0.25];
The sectional shape of depressed area 3 as shown in figure 10, form can be Line
1, Line
2, Line
3In any one, wherein, Line
1Be the narrow shape in wide two ends, centre, or be funnel-like, or be bowl-shape.Line
2For being funnel-like; Line
3For bowl-shape; Also can straight line or curve connect to form successively by several sections; Line
0For processing front cross section molded line in fan blade depressed area 3.
This axial-flow leaf increases folded edges (the flanging mode is the segmentation flanging) in the blade outer rim, and this structure can change the mode of airflow passes blade outer rim, improves blade outer rim leakage phenomenon; In addition, also increase " depression " structure at blade inlet edge, in the mode of change airflow passes blade inlet edge, thereby reach the effect of improving the blade inlet edge boundary layer separation.In a word, compare with existing axial-flow leaf, improved the efficient of blower fan, the whirlpool noise of reduction fan blade, and then reached the effect that reduces fan blade noise total value and fan blade power, advantage sees the following form.
Axial-flow leaf of the present utility model and the contrast of existing axial-flow leaf test data of experiment
As can be seen from the above table, according to axial-flow leaf of the present utility model, compare with existing axial-flow leaf, under the essentially identical operating mode of air quantity, noise decreases; Under the basic operating mode that equates of noise size that produces, can obtain larger air quantity.Axial-flow leaf of the present utility model is used on the air conditioner in machine room outdoor unit air channel.Under the 960rpm speed conditions, single fan delivery can reach 11500m
3More than/the h, not only satisfy system requirements, and motor power consumption is reduced, noise is reduced.
The above embodiment has only expressed several mode of execution of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (15)
1. an axial-flow leaf comprises wheel hub and the blade that is connected on the described wheel hub, and the two sides of described blade is respectively the pressure side of air side and the suction surface of inlet side, and the radially outer edge of described blade is outer rim, it is characterized in that:
The outer rim of described blade is provided with the multistage flanging, described flanging direction by described pressure side towards described suction surface.
2. axial-flow leaf according to claim 1 is characterized in that:
The arc length of arbitrary section described flanging is 0.1～0.75 with the ratio of the arc length of described blade outer rim.
3. axial-flow leaf according to claim 2 is characterized in that:
The outer rim of described blade is provided with two sections flangings, and the first paragraph flanging is arranged on the position near blade inlet edge, and the second segment flanging is arranged on the position near trailing edge.
4. axial-flow leaf according to claim 3 is characterized in that:
The bending angle of described first paragraph flanging is θ
1, 60 °≤θ
1≤ 120 °, the bending angle of described second segment flanging is θ
2, 90 °≤θ
2＜180 °.
5. axial-flow leaf according to claim 4 is characterized in that:
The bending angle θ of described first paragraph flanging
1Bending angle θ less than described second segment flanging
2
6. axial-flow leaf according to claim 4 is characterized in that:
The bending angle θ of described first paragraph flanging
1Be 85 °～95 °, the bending angle θ of described second segment flanging
2It is 130 °～140 °.
7. axial-flow leaf according to claim 1 is characterized in that:
The ratio of the vane thickness that the maximum value of the height of every section described flanging on described blade is corresponding with its position is 0.5～4.5.
8. axial-flow leaf according to claim 7 is characterized in that:
The outer rim of described blade is provided with two sections flangings, and the height maximum value of every section described flanging on described blade is not identical.
9. axial-flow leaf according to claim 8 is characterized in that:
Described first paragraph flanging is in the maximum value of the height on the blade maximum value greater than the height of described second segment flanging on blade.
10. axial-flow leaf according to claim 1 is characterized in that:
The start radius R2's of the radius R 1 of described fan blade and the starting point of arbitrary section described flanging is poor, with the ratio of the radius R 1 of described fan blade be 0.025～0.1, i.e. 0.025≤(R1-R2)/R1≤0.1.
11. axial-flow leaf according to claim 1 is characterized in that:
The changes shape of every section described flanging height is recessed shape, convex shaped or lineal shape.
12. to 11 each described axial-flow leafs, it is characterized in that according to claim 1:
Also be provided with the depressed area to described pressure side direction depression from described suction surface near the leading edge of described blade or the leading edge.
13. axial-flow leaf according to claim 12 is characterized in that:
The cup depth of described depressed area is 0.5～1.5 with the ratio of the maximum ga(u)ge of the blade of position, described depressed area.
14. axial-flow leaf according to claim 13 is characterized in that:
The ratio of the width of described depressed area maximum and the wing chord length of described blade is 0.05～0.25.
15. according to claim 13 or 14 described axial-flow leafs, it is characterized in that:
The maximum radius at place, described depressed area and the ratio of described fan blade radius are 0.5～1.0;
The least radius at place, described depressed area and the ratio of described fan blade radius are 0.29～0.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220378836 CN202707612U (en) | 2012-07-31 | 2012-07-31 | Axial-flow fan blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220378836 CN202707612U (en) | 2012-07-31 | 2012-07-31 | Axial-flow fan blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202707612U true CN202707612U (en) | 2013-01-30 |
Family
ID=47587919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220378836 Expired - Lifetime CN202707612U (en) | 2012-07-31 | 2012-07-31 | Axial-flow fan blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202707612U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103573703A (en) * | 2012-07-31 | 2014-02-12 | 珠海格力电器股份有限公司 | Axle-flow fan blade |
| CN106996393A (en) * | 2016-01-22 | 2017-08-01 | 日本斯频德制造株式会社 | Possesses the cooling tower of axial fan |
| CN111946667A (en) * | 2020-07-28 | 2020-11-17 | 东风马勒热系统有限公司 | Fan with bent blades |
-
2012
- 2012-07-31 CN CN 201220378836 patent/CN202707612U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103573703A (en) * | 2012-07-31 | 2014-02-12 | 珠海格力电器股份有限公司 | Axle-flow fan blade |
| CN103573703B (en) * | 2012-07-31 | 2016-03-09 | 珠海格力电器股份有限公司 | Axial-flow leaf |
| CN106996393A (en) * | 2016-01-22 | 2017-08-01 | 日本斯频德制造株式会社 | Possesses the cooling tower of axial fan |
| CN106996393B (en) * | 2016-01-22 | 2019-05-10 | 日本斯频德制造株式会社 | The cooling tower for having axial fan |
| CN111946667A (en) * | 2020-07-28 | 2020-11-17 | 东风马勒热系统有限公司 | Fan with bent blades |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130130 |