CN204186638U - Fan blade and the fan being provided with this fan blade - Google Patents
Fan blade and the fan being provided with this fan blade Download PDFInfo
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- CN204186638U CN204186638U CN201420604088.3U CN201420604088U CN204186638U CN 204186638 U CN204186638 U CN 204186638U CN 201420604088 U CN201420604088 U CN 201420604088U CN 204186638 U CN204186638 U CN 204186638U
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- blade
- imploded arcs
- fan blade
- fan
- arcs
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Abstract
The utility model discloses a kind of blade structure imitating bat wing, use for reference three sections of arc structures at bat wing edge, arrange at least two sections of imploded arcs on blade air intake limit, described imploded arcs can extend to outer rim place, leaf top from the blade root of blade.Application the technical solution of the utility model, the Turbulent Boundary Layer area of blade can be reduced on the one hand, thus the pressure pulsation of turbulent flow acts on the noise that blade produces in reduction boundary layer, Turbulent Boundary Layer area reduces also to make the Shedding Vortex size of blade afterbody reduce on the other hand, reduces the noise that eddy current comes off, can also improve effective acting area of fan blade pressure side, improve fan blade acting ability, relatively do not have the fan blade of imploded arcs, blast improves about 6%, and that uses that general mood stream blows is farther.The invention also discloses a kind of fan comprising above-mentioned fan blade.
Description
Technical field
The utility model relates to household appliance technical field, more specifically, relates to a kind of fan blade and the fan being provided with this fan blade.
Background technique
Now, the application of fan is more and more extensive, both can be used for, for mankind's cooling is relieved summer heat, can being used for again as cooling electronic component.The standard evaluating fan performance quality is mainly the acting ability of fan blade, improving fan blade acting ability is generally improve the rotating speed of fan, but be very easy to so again bring series of problems: one, form Turbulent Boundary Layer on the surface of blade, in boundary layer, the pressure pulsation of turbulent flow acts on blade and can produce larger noise; Two, the impact eddy current that is subject to of fan blade leading edge increases, thus blade afterbody eddy current comes off and also can form noise.
There is a kind of way to be have multiple serrated slot do not waited at edge, blade air side, form multiple Unequal distance sawtooth, the maelstrom that can produce air-out place cuts, be carded to countless little eddy current, thus the noise that reduction blade High Rotation Speed brings.But this scheme can not improve the turbulent layer of blade surface, and noise reduction is not ideal enough, and multiple little sawtooth complex process is set, easily cracked.
Given this, need to design a kind of scheme, both can reduce the pressure pulsation of turbulent flow in Turbulent Boundary Layer, eddy current can have been reduced again and come off, thus reduce fan noise further.
Summary of the invention
The utility model is intended to solve prior art Problems existing, take a hint from three sections of Unequal distance inner concave conical arc structures at bat wing edge, a kind of fan blade is provided, effectively can reduce the noise that in the impact eddy current and blade surface Turbulent Boundary Layer that in fan operation, fan blade air intake limit is subject to, pressure pulsation causes, and the acting ability of fan blade can be improved, increase lift.
To achieve these goals, the utility model provides a kind of fan blade, and blade air intake limit is provided with at least two sections of imploded arcs, and described imploded arcs is all located between blade root and leaf top outer rim.
Further, tapered chord is long each other for described imploded arcs.
Further, the chord length value near the imploded arcs at blade root place is maximum.
Further, described imploded arcs is three, the first imploded arcs, the second imploded arcs and the 3rd imploded arcs is followed successively by from blade root to leaf top, wherein the chord length value of the first imploded arcs is greater than the chord length value of the second imploded arcs and the 3rd imploded arcs respectively, and the chord length value of the first imploded arcs is less than or equal to the chord length value sum of the second imploded arcs and the 3rd imploded arcs.
Further, described imploded arcs is three, the first imploded arcs, the second imploded arcs and the 3rd imploded arcs is followed successively by from blade root to leaf top, wherein the curvature value of the first imploded arcs is 0.0496-0.0528, the curvature value of the second imploded arcs is 0.0129-0.1343, and the curvature value of the 3rd imploded arcs is 0.0062-0.0766
Further, described imploded arcs is circular arc or taper arc.
According to the another aspect of model utility, provide a kind of fan, this fan is provided with above-mentioned fan blade.
The utility model discloses a kind of blade structure imitating bat wing, use for reference three sections of arc structures at bat wing edge, arrange at least two sections of imploded arcs on blade air intake limit, described imploded arcs can extend to outer rim place, leaf top from the blade root of blade.Application the technical solution of the utility model, the Turbulent Boundary Layer area of blade can be reduced on the one hand, thus the pressure pulsation of turbulent flow acts on the noise that blade produces in reduction boundary layer, Turbulent Boundary Layer area reduces also to make the Shedding Vortex size of blade afterbody reduce on the other hand, reduces the noise that eddy current comes off, can also improve effective acting area of fan blade pressure side, improve fan blade acting ability, relatively do not have the fan blade of imploded arcs, blast improves about 6%, and that uses that general mood stream blows is farther.
Accompanying drawing explanation
The Figure of description forming a application's part is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 shows the utility model fan blade plan view;
Fig. 2 shows the single blades structural drawing of the utility model first embodiment;
Fig. 3 shows the taper imploded arcs structural drawing of the utility model first embodiment;
Fig. 4 shows traditional fan blade pressure side static pressure distribution cloud atlas;
Fig. 5 shows the utility model fan blade pressure side static pressure distribution cloud atlas;
Fig. 6 shows traditional fan blade suction surface noise profile cloud atlas;
Fig. 7 shows the utility model fan blade suction surface noise profile cloud atlas;
Fig. 8 shows the circular imploded arcs structural drawing of the utility model first embodiment.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe this patent in detail in conjunction with the embodiments.
First embodiment
As shown in Fig. 1 to 2, the fan blade of the first embodiment comprises blade 2 and is arranged on three imploded arcs on fan blade air intake limit, is respectively the first imploded arcs 11, second imploded arcs 12 and the 3rd imploded arcs 13.According to bat wing bionics principle, the Turbulent Boundary Layer area of blade can be reduced by described imploded arcs structure, thus the pressure pulsation of turbulent flow acts on the noise that blade produces in reduction boundary layer, Turbulent Boundary Layer area reduces also to make the Shedding Vortex size of blade afterbody reduce simultaneously, reduce the noise that eddy current comes off, effective acting area of fan blade pressure side can also be improved, improve fan blade acting ability.Further, the first imploded arcs 11, second imploded arcs 12 and the 3rd imploded arcs 13 distribute from the blade root of blade successively to outer rim place, leaf top.
Preferably, the first imploded arcs 11 originates in the blade root place of blade, and the 3rd imploded arcs 13 extends to outer rim place, leaf top.Like this, imploded arcs covers the air intake limit of whole blade, and the effect of noise reduction and raising fan blade acting ability is better.Also can be the blade root place that the first imploded arcs 11 originates in blade, there is certain distance in the 3rd imploded arcs 13 end and leaf top outer rim.Also can be that the starting point of the first imploded arcs 11 and the blade root of blade exist certain distance, there is certain distance in the 3rd imploded arcs 13 end and leaf top outer rim.Also can be that the starting point of the first imploded arcs 11 and the blade root of blade exist certain distance, the 3rd imploded arcs 13 extends to outer rim place, leaf top.
At blade surface, because the height distribution of noise and static pressure is successively decreased gradually from leaf top to blade root, so arrange described three imploded arcs, tapered chord is long each other.The closer to blade root place noise and static pressure lower, near blade root place the first imploded arcs 11 chord length value maximum, on the contrary, the closer to Ye Dingchu noise and static pressure higher, near leaf top place the 3rd imploded arcs 13 chord length value minimum.This setting makes the noise of described three imploded arcs sizes and blade surface and static pressure adapt.
The chord length of described three imploded arcs arranges and will adapt with the noise of blade surface and static pressure, so the chord length value of the first imploded arcs 11 is maximum, and is less than or equal to the chord length value sum of the second imploded arcs 12 and the 3rd imploded arcs 13.
As shown in Figure 3, preferably, described three imploded arcs are taper arc, comparatively heavy camber side is near Ye Ding direction, wherein the curvature of the first imploded arcs 11 is 0.0496-0.0528, and the curvature of the second imploded arcs 12 is 0.0129-0.1343, and the curvature of the 3rd imploded arcs 13 is 0.0062-0.0766.
Through the fluid mechanics software testing authentication repeatedly of CFD specialty, relative air intake limit does not have the fan blade of imploded arcs, and fan blade pressure side static pressure improves about 6%, and that uses that general mood stream blows is farther.Be isostatic pressed line see the curve in Fig. 4 and Fig. 5, figure, the numerical value on curve is static pressure, and unit is handkerchief.According to the distribution of isostatic pressed line, contrast traditional fan blade and this patent fan blade, observe the static pressure at pressure side place, pressure side is exactly the curved surface that fan blade presses air-flow acting, face air-flow air-out position, the zone of high pressure area (more than 10Pa region) of this patent fan blade will obviously be greater than traditional fan blade, and high-pressure area is closer to fan blade trailing edge, the main acting region of fan blade is better the closer to trailing edge place, illustrates that the acting ability of this patent fan blade is stronger.
In addition, through the testing authentication repeatedly of FFT noise software, relative air intake limit does not have the fan blade of imploded arcs, and fan blade suction surface noise obviously reduces.Be noise contour line see the curve in Fig. 6 and Fig. 7, figure, the numerical value on curve is noise figure, and unit is decibel.Owing to affecting the main portions of fan blade noise at suction surface place, namely towards the one side carrying out flow path direction.According to the distribution of noise contour line, contrast the noise of traditional fan blade and this patent fan blade suction surface, can see in 40% to 70% leaf eminence, the low noise region area of this patent fan blade is greater than traditional fan blade, and Main Differences is just near leading edge, illustrate that this patent fan blade really can impact eddy current crack to the leading edge of fan blade and play certain weakening effect, and this imploded arcs structure makes blade Turbulent Boundary Layer area reduce, further reduce the pulsating force that Turbulent Boundary Layer causes, reduce noise, also make afterbody eddy current size reduce, reduce the noise that eddy current comes off.
As shown in Figure 8, above-mentioned three imploded arcs also can be two ends circular arc symmetrically.
According to another aspect of the present utility model, provide a kind of fan, this fan is provided with the fan blade described in the first embodiment.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (7)
1. a fan blade, is characterized in that, blade air intake limit is provided with at least two sections of imploded arcs, and described imploded arcs is all located between blade root and leaf top outer rim.
2. fan blade according to claim 1, is characterized in that, described imploded arcs each other tapered chord is long.
3. fan blade according to claim 2, is characterized in that, the chord length value near the imploded arcs at blade root place is maximum.
4. fan blade according to claim 2, it is characterized in that, described imploded arcs is three, the first imploded arcs, the second imploded arcs and the 3rd imploded arcs is followed successively by from blade root to leaf top, wherein the chord length value of the first imploded arcs is greater than the chord length value of the second imploded arcs and the 3rd imploded arcs respectively, and the chord length value of the first imploded arcs is less than or equal to the chord length value sum of the second imploded arcs and the 3rd imploded arcs.
5. fan blade according to claim 2, it is characterized in that, described imploded arcs is three, the first imploded arcs, the second imploded arcs and the 3rd imploded arcs is followed successively by from blade root to leaf top, wherein the curvature value of the first imploded arcs is 0.0496-0.0528, the curvature value of the second imploded arcs is 0.0129-0.1343, and the curvature value of the 3rd imploded arcs is 0.0062-0.0766.
6. fan blade according to any one of claim 1 to 5, is characterized in that, described imploded arcs is circular arc or taper arc.
7. a fan, is characterized in that, described fan is provided with the fan blade according to any one of claim 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420604088.3U CN204186638U (en) | 2014-10-17 | 2014-10-17 | Fan blade and the fan being provided with this fan blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420604088.3U CN204186638U (en) | 2014-10-17 | 2014-10-17 | Fan blade and the fan being provided with this fan blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204186638U true CN204186638U (en) | 2015-03-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420604088.3U Expired - Fee Related CN204186638U (en) | 2014-10-17 | 2014-10-17 | Fan blade and the fan being provided with this fan blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204186638U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106640748A (en) * | 2017-01-06 | 2017-05-10 | 珠海格力电器股份有限公司 | Blade, impeller and fan |
-
2014
- 2014-10-17 CN CN201420604088.3U patent/CN204186638U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106640748A (en) * | 2017-01-06 | 2017-05-10 | 珠海格力电器股份有限公司 | Blade, impeller and fan |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20150304 Termination date: 20211017 |