CN204591784U - Fan blade, blower fan and air conditioner - Google Patents
Fan blade, blower fan and air conditioner Download PDFInfo
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- CN204591784U CN204591784U CN201520158385.4U CN201520158385U CN204591784U CN 204591784 U CN204591784 U CN 204591784U CN 201520158385 U CN201520158385 U CN 201520158385U CN 204591784 U CN204591784 U CN 204591784U
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- 241001672694 Citrus reticulata Species 0.000 abstract description 8
- 238000000926 separation method Methods 0.000 abstract description 6
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- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
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Abstract
The utility model provides a kind of fan blade, blower fan and air conditioner.This fan blade comprises wheel hub and blade, described blade shroud distributes around described wheel hub, the line of the outer end points C of described blade and the interior terminal A of described blade is camber line, the center O of the center of circle B of described camber line, the interior terminal A of described blade and described wheel hub forms right-angled triangle, wherein ∠ AOB is right angle, reduce the air current flow ricing of blade to reach, suppress the air-flow of blade to become a mandarin the multiclass Turbulence Flow such as separations, blade-to-blade vortex, improve the object of the uniformity that fan blade goes out to flow.
Description
Technical field
The utility model relates to Fan Equipment field, particularly relates to a kind of fan blade, the blower fan containing this fan blade, and the air conditioner containing this blower fan.
Background technique
At present, the fan blade of most of blower fan adopts the blade of prismatic blade or circular arc airfoil structure.The blade of prismatic blade or circular arc airfoil structure is convenient to die sinking processing, but this structure easily produces larger blade inlet edge pressure under Part load and inflow condition, and then the possibility of airflow breakaway can be made greatly to increase, this aeroperformance for blower fan and noise level have considerable influence.
Model utility content
Based on this, be necessary easily to produce leading edge pressure for fan blade and then cause the problem of airflow breakaway, a kind of air current flow ricing that can reduce runner between leaf is provided, the air-flow of blade is suppressed to become a mandarin the fan blade of the Turbulence Flow such as separation, blower fan containing above-mentioned fan blade, and the air conditioner containing this blower fan.Above-mentioned purpose is achieved through the following technical solutions:
A kind of fan blade, comprise wheel hub and blade, described blade shroud distributes around described wheel hub, the line of the outer end points C of described blade and the interior terminal A of described blade is camber line, the center O of the center of circle B of described camber line, the interior terminal A of described blade and described wheel hub forms right-angled triangle, and wherein ∠ AOB is right angle.
Wherein in an embodiment, the thickness of described blade is identical.
Wherein in an embodiment, the height h of described blade with any point in the outer rim of described blade and this point to described wheel hub axis between distance and change.
Wherein in an embodiment, the sectional shape of the outer rim of described blade is oblique line.
Wherein in an embodiment, the sectional shape of the outer rim of described blade is camber line.
Wherein in an embodiment, between the outer rim of described blade and horizontal plane, there is angle theta
1, and θ
1, between the leading edge of described blade and vertical plane, there is angle theta in <90 °
2, and θ
2<85 °.
Wherein in an embodiment, the angle theta between the outer rim of described blade and horizontal plane
1scope be 3 ° of < θ
1<16 °, the angle theta between the leading edge of described blade and vertical plane
2scope be 15 ° of < θ
2<35 °.
Wherein in an embodiment, form runner between leaf between described wheel hub and described blade and between two of arbitrary neighborhood described blades, between described leaf, the area S of runner keeps constant.
Wherein in an embodiment, described fan blade also comprises shroud, and described shroud is arranged on described blade, and the surface configuration of the leading edge of the surface configuration of described shroud and described blade is suitable.
Wherein in an embodiment, the leading edge that described blade is close to by described shroud is arranged.
Wherein in an embodiment, there is predeterminable range between described shroud and described blade, described predeterminable range is 1.5mm ~ 6mm.
Also relate to a kind of blower fan, comprise the fan blade as described in above-mentioned any one.
Also relate to a kind of air conditioner, comprise the blower fan as described in above-mentioned technical characteristics.
The beneficial effects of the utility model are:
Fan blade of the present utility model, blower fan and air conditioner, structural design advantages of simple, adopts the line of the outer end points C of blade and the interior terminal A of blade to form the blade of arc-shaped structure, can ensure between blade moment of momentum uc
uarc direction along blade keeps constant, air velocity distribution distribution form between blade can reduce the air current flow ricing of blade greatly, the air-flow of blade is suppressed to become a mandarin the multiclass Turbulence Flow such as separation, blade-to-blade vortex, improve the uniformity that fan blade goes out stream, and then improve the performance of blower fan, the object reducing noise can also be reached simultaneously.
Accompanying drawing explanation
Fig. 1 be fan blade of the present utility model etc. the schematic diagram of fan blade of circular rector airfoil structure;
Fig. 2 is the schematic diagram of the air current flow of the fan blade shown in Fig. 1;
Fig. 3 is the leading edge of the fan blade one embodiment Leaf shown in Fig. 1 sectional view parallel with vertical plane;
The sectional view of angle is there is between the leading edge that Fig. 4 is another embodiment's Leaf of the fan blade shown in Fig. 1 and vertical plane;
Fig. 5 for the leading edge of fan blade in the fan blade shown in Fig. 4 be the sectional view of curved-surface structure;
Fig. 6 is for fan blade in the fan blade shown in Fig. 4 being installed the sectional view of shroud;
Fig. 7 is the air-flow velocity distribution schematic diagram in each cross section of the fan blade shown in Fig. 4;
Wherein:
100-fan blade;
110-hub disk; 111-wheel hub;
120-blade; 121-outer rim; 122-leading edge;
130-shroud.
Embodiment
In order to make the purpose of this utility model, technological scheme and advantage clearly understand, by the following examples, and by reference to the accompanying drawings, fan blade of the present utility model, blower fan and air conditioner are further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
See Fig. 1 to Fig. 3, the fan blade 100 of the utility model one embodiment, comprises hub disk 110 and blade 120, and the central position of hub disk 110 is a sectional shape is annular wheel hub 111, the wheel hub 111 of annular can be convenient to the installation of fan blade 100, and then drives fan blade 100 to rotate.Wheel hub 111 protrudes from the surface of hub disk 110, and blade 120 is uniformly distributed around wheel hub 111, and air-flow contacts with the outer rim 121 of fan blade 100.The sectional shape of the bottom of the outer surface of wheel hub 111 is arc, and the final position of arc is the inner ring of hub disk 110, and one end of blade 120 is positioned in the inner ring of hub disk 110, and the other end of blade 120 is positioned on the outer shroud of hub disk 110.Be uniformly distributed and can ensure that the impact force that each blade 120 bears is consistent, reduce the vibration of fan blade 100, ensure simultaneously air-flow can on fan blade 100 smooth flow.Runner Q between leaf is formed between protruding wheel hub 111 and blade 120 and between two blades 120 of arbitrary neighborhood, air-flow flow into runner Q between the leaf between two blades 120 of arbitrary neighborhood by runner Q between the leaf between protruding wheel hub 111 and blade 120, greatly can reduce the air-flow ricing that runner Q flows between leaf like this, the air-flow of blade 120 is suppressed to become a mandarin the multiclass Turbulence Flow such as separation, blade-to-blade vortex, improve the uniformity that fan blade 100 goes out stream, and then improve the performance of blower fan.
The line of the outer end points C of blade and the interior terminal A of blade is camber line, and this camber line such as is at the arc of circular rector aerofoil profile bone line.Circular fitting mode is adopted to generate etc. the arc AC of circular rector aerofoil profile bone line.Blade 120 etc. the generating mode of arc of circular rector aerofoil profile bone line be generally the mode adopting curve approximation matching.In the utility model, blade 120 etc. the arc AC of circular rector aerofoil profile bone line adopt circular arc combination to generate, and then the blade 120 of the circular rector aerofoil profile bone line such as generation.As shown in Figure 1, O is the center (being also the center of wheel hub 111) of hub disk 110, A is a bit (being the interior end points of blade 120) in the inner ring of hub disk 120, choose ∠ OAB=β, ∠ AOB=90 °, be line segment OB and line segment AB respectively, make line segment OB and line segment AB intersect at a B.
Again with a B for the center of circle, line AB is radius, initial to meeting at a C (being the outer end points of blade) with the outer shroud of hub disk 110 by an A, formed blade 120 etc. the arc AC of circular rector aerofoil profile bone line.Blade 120 is formed, to avoid the separated flow that becomes a mandarin of air-flow runner Q between inlet side and leaf in the both sides up and down of the arc AC waiting circular rector aerofoil profile bone line with blade 120 thickness distribution.The flowing direction of arrow as shown in Figure 2 of runner Q between the leaf of air-flow between two blades 120 of arbitrary neighborhood.Now, intersection point C, the blade 120 of the outer shroud of blade 120 and hub disk 110 are camber line with the line of the intersection point A of the inner ring of hub disk 110, this camber line such as is at the arc AC of circular rector aerofoil profile bone line, forms right-angled triangle etc. the intersection point A of inner ring of the center of circle B of circular rector aerofoil profile bone line, blade 120 and the hub disk 110 and center O of hub disk 110.
Blade 120 in long and narrow, adopt circular fitting mode generate described blade 120 etc. circular rector aerofoil profile bone line, formed blade 120 etc. circular rector airfoil structure.Blade 120 in fan blade 100 of the present utility model such as is at the circular rector airfoil structure, or is called idle blade 120 structure, and its theoretical foundation is the moment of momentum uc that the acting ability of blade 120 is mainly reflected in runner Q place between leaf
uchange.Air-flow to flow between wheel hub 111 and blade 120 runner Q between leaf from wheel hub 111, runner Q flowing out from the marginal position between any two adjacent blades 120 between leaf between two blades 120 flowing through arbitrary neighborhood.That is wheel hub 111 place is the inlet side of air-flow, and the marginal position between any two adjacent blades 120 of blade 120 is the outlet side of air-flow.
At inlet side, involved speed is the velocity amplitude of air-flow when inlet side, the radial velocity u of air-flow
1with the relative velocity w of blade 120
1synthesize the absolute velocity c of air-flow
1, cu
1for the absolute velocity c of air-flow
1at the radial velocity u of air-flow
1component on the straight line of place, u
1=r
1× ω, wherein, ω is the rotational angular velocity of blade 120, r
1for the distance between inlet side and the center of hub disk 110.At outlet side, involved speed is the velocity amplitude of air-flow when outlet side, the radial velocity u of air-flow
2with the relative velocity w of blade 120
2synthesize the absolute velocity c of air-flow
2, cu
2for the absolute velocity c of air-flow
2at the radial velocity u of air-flow
2component on the straight line of place, u
2=r
2× ω, wherein, r
2for the distance between outlet side and the center of hub disk 110.Moment of momentum uc
ualong blade 120 etc. circular rector aerofoil profile bone line direction keep constant, the flow velocity of air-flow does not have obvious acceleration or deceleration, and the flowing of air-flow runner Q between leaf is comparatively steady, can reduce the vibration of fan blade 100 like this, reduces the noise of fan blade 100.
At present, in centrifugal blower, general fan blade adopts the blade of prismatic blade or circular arc airfoil structure.The blade of prismatic blade or circular arc airfoil structure is convenient to die sinking processing, but this structure easily produces the leading edge pressure of larger blade under Part load and inflow condition, and then the possibility of airflow breakaway can be made greatly to increase, this aeroperformance for blower fan and noise level have considerable influence.See Fig. 1 to Fig. 3, the blade 120 of the circular rector airfoil structures such as fan blade 100 of the present utility model employing ensures moment of momentum uc
ualong blade 120 etc. circular rector aerofoil profile bone line direction keep constant, make the air velocity distribution distribution form at runner Q place between leaf greatly can reduce the air current flow ricing of blade 120, the air-flow of blade 120 is suppressed to become a mandarin the multiclass Turbulence Flow such as separation, blade-to-blade vortex, guarantee air current flow is steady, improve the performance of blower fan, reach the object reducing noise.
As shown in Figure 3 and Figure 4, as a kind of embodiment, the leading edge 122 of blade 120 parallel with vertical plane or and vertical plane between there is angle theta
2.The leading edge 122 of blade 120 is the surface of blade 120 and wheel hub 111 opposite position, and the surface of the leading edge 122 of blade 120 can be vertical plane, also can be plane of inclination.As shown in Figure 3, the leading edge 122 of blade 120 is parallel with vertical plane, and namely the surface of the leading edge 122 of blade 120 is vertical plane, so that the processing of blade 120.As shown in Figure 4, there is angle theta between the leading edge 122 of blade 120 and vertical plane
2, namely the surface of the leading edge 122 of blade 120 is plane of inclination, and plane of inclination tilts from the outer rim 121 of blade 120 to wheel hub 111, to reduce the velocity gradient in leading edge 122 between each point, and the uniformity that the air-flow improving fan blade 100 flows out, and then improve the performance of blower fan.
Further, the angle theta between the leading edge 122 of blade 120 and vertical plane
2<85 °.In the utility model, angle theta between the leading edge 122 of blade 120 and vertical plane
2preferable range be 15 ° of < θ
2<35 °.Angle between the leading edge 122 of blade 120 and vertical plane can make the velocity gradient in leading edge 122 between each point reduce further between 15 ° ~ 35 °, the uniformity that the air-flow improving fan blade 100 flows out.
See Fig. 3, as a kind of embodiment, the thickness of blade 120 is identical.In order to ensure blade 120 etc. the surface of the upper and lower both sides of circular rector aerofoil profile bone line the distributary phenomenon that becomes a mandarin of air-flow can be suppressed preferably to occur, the blade 120 of equal thickness can be selected, namely blade 120 is identical along hub disk 110 thickness in the radial direction, can avoid the airflow diversion phenomenon between inlet side and leaf between runner Q like this.
See Fig. 4 and Fig. 5, certainly, the height h of blade 120 can also change, the uniformity that the air-flow that can improve fan blade 100 so further flows out to the change of the spacing of the axis of wheel hub 111 with any point in the outer rim 121 of blade 120 and this point, improves the performance of blower fan.
As shown in Figure 4, a kind of mode of execution is the sectional shape of blade 120 is oblique line, and namely the height h of blade 120 is equivalent change, the angle theta between the outer rim 121 of blade 120 and horizontal plane
1remain unchanged.The outer rim 121 of blade 120 forms one section of oblique line, and the surface of the outer rim 121 of blade 120 is a plane of inclination, and this plane of inclination tilts from wheel hub 111 to the excircle place of hub disk 110, now, and the angle theta between the outer rim 121 of blade 120 and horizontal plane
1remain unchanged, ensure that air-flow can smooth flow in the leading edge 122 of blade 120, the uniformity that the air-flow improving fan blade 100 further flows out, improve the performance of blower fan.Further, as shown in figs. 4 and 7, the outer rim 121 of blade 120 is meridian plane, this blade 120 is on the blade 120 advantage basis of circular rector airfoil structures such as following, improve blower fan further by the leading edge 122 place air velocity gradient reducing blade 120 to go out to flow uniformity, improve the performance of blower fan.The arrow at M-M and the N-N place shown in Fig. 7 is air velocity gradient.
As described in figures 1 and 5, another mode of execution is the sectional shape of the outer rim 121 of blade 120 is camber line, and namely the outer rim 121 of blade 120 is cambered surface.The outer rim 121 of blade 120 carries out change forming curves form by molded line, general, using camber line as the curve form of the outer rim 121 of blade 120.Further, between leaf, the direction of the arc AC of the circular rector aerofoil profile bone line such as area S edge of runner Q keeps constant, the angle theta between the outer rim 121 of blade 120 and horizontal plane
1and the change of the height h of blade 120 should coordinate the distance of runner Q between leaf to change, the direction of the arc AC of the circular rector aerofoil profile bone lines such as the area S edge of runner Q between leaf is made to keep constant, with the uniformity that the air-flow improving fan blade 100 further flows out, improve the performance of blower fan, now, the angle theta between the outer rim 121 of blade 120 and horizontal plane
1change according to certain rules.
As a kind of embodiment, the angle theta between the outer rim 121 of blade 120 and horizontal plane
1<90 °.In the utility model, angle theta between the outer rim 121 of blade 120 and horizontal plane
1preferable range be 3 ° of < θ
1<16 °.Angle between the outer rim 121 of blade 120 and horizontal plane can ensure that within the scope of 3 ° ~ 16 ° air-flow can smooth flow in the leading edge 122 of blade 120 further, the uniformity that the air-flow improving fan blade 100 flows out, and improves the performance of blower fan.
As shown in Figure 6, as a kind of embodiment, fan blade 100 also comprises shroud 130, shroud 130 is arranged on multiple blade 120, reduced the temperature of fan blade 100 by shroud 130, ensure fan blade 100 stable movement when rotating, and then ensure that air-flow can smooth flow on fan blade 100.And the surface configuration of the leading edge 122 of the surface configuration of shroud 130 and blade 120 is suitable, so that the installation of shroud 130.Further, the leading edge 122 that blade 120 is close to by shroud 130 is arranged, and namely the surface of shroud 130 and the leading edge 122 of blade 120 fit, and can ensure the dynamic balancing of fan blade 100 like this, fan blade 100 be there will not be when rotating rock, ensureing fan blade 100 stable movement.
Certainly, predeterminable range can also be there is between shroud 130 and blade 120, the flow of fan blade 100 air-flow can be increased by predeterminable range, air-flow can in predeterminable range be blade 120 leading edge 122 on flowing, also can flow on the surface of shroud 130 away from blade 120, to increase the throughput of fan blade 100.Predeterminable range is within the scope of 1.5mm ~ 6mm, and throughput increases obvious; Prepsetting gap is too small, and air-flow can produce larger pressure in prepsetting gap, affects the performance of fan blade 100; Prepsetting gap is comparatively large, and air-flow directly flows in prepsetting gap, can not flow, make shroud 130 inoperative on shroud 130.
A kind of blower fan of the present utility model, comprise the fan blade 100 as described in above-mentioned any embodiment, the fan blade of the circular rector airfoil structures such as above-mentioned fan blade 100 employing reduces the air-flow ricing that runner Q flows between leaf, suppress the multiclass Turbulence Flow such as separation, blade-to-blade vortex that become a mandarin of air-flow, the uniformity that the air-flow improving fan blade 100 flows out, the uniformity of the air-flow outflow of further raising blower fan, ensures fan performance, reaches the object reducing noise.A kind of air conditioner of the present utility model, comprises the blower fan in above-described embodiment, the uniformity that the air-flow improving air conditioner by the fan blade 100 in blower fan flows out, and ensures the performance of air conditioner.
The above embodiment only have expressed several mode of execution of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It 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 (13)
1. a fan blade, it is characterized in that, comprise wheel hub (111) and blade (120), described blade (120) distributes around described wheel hub (111), the line of the outer end points C of described blade (120) and the interior terminal A of described blade (120) is camber line, the interior terminal A of the center of circle B of described camber line, described blade (120) and the center O of described wheel hub (110) form right-angled triangle, and wherein ∠ AOB is right angle.
2. fan blade according to claim 1, is characterized in that, the thickness of described blade (120) is identical.
3. fan blade according to claim 1, it is characterized in that, the height h of described blade (120) with any point in the outer rim (121) of described blade (120) and this point to described wheel hub (111) axis between distance and change.
4. fan blade according to claim 3, is characterized in that, the sectional shape of the outer rim (121) of described blade (120) is oblique line.
5. fan blade according to claim 3, is characterized in that, the sectional shape of the outer rim (121) of described blade (120) is camber line.
6. the fan blade according to claim 4 or 5, is characterized in that, there is angle theta between the outer rim (121) of described blade (120) and horizontal plane
1, and θ
1, between the leading edge (122) of described blade (120) and vertical plane, there is angle theta in <90 °
2, and θ
2<85 °.
7. fan blade according to claim 6, is characterized in that, the angle theta between the outer rim (121) of described blade (120) and horizontal plane
1scope be 3 ° of < θ
1<16 °, the angle theta between the leading edge (122) of described blade (120) and vertical plane
2scope be 15 ° of < θ
2<35 °.
8. fan blade according to claim 6, it is characterized in that, form runner between leaf between described wheel hub (111) and described blade (120) and between two described blades (120) of arbitrary neighborhood, between described leaf, the area S of runner keeps constant.
9. fan blade according to claim 1, it is characterized in that, described fan blade (100) also comprises shroud (130), described shroud (130) is arranged on described blade (120), and the surface configuration of the leading edge (122) of the surface configuration of described shroud (130) and described blade (120) is suitable.
10. fan blade according to claim 9, is characterized in that, the leading edge (122) that described blade (120) are close to by described shroud (130) is arranged.
11. fan blades according to claim 10, is characterized in that, there is predeterminable range between described shroud (130) and described blade (120), and described predeterminable range is 1.5mm ~ 6mm.
12. 1 kinds of blower fans, is characterized in that, comprise the fan blade (100) as described in any one of claim 1 to 11.
13. 1 kinds of air conditioners, is characterized in that, comprise blower fan as claimed in claim 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520158385.4U CN204591784U (en) | 2015-03-19 | 2015-03-19 | Fan blade, blower fan and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520158385.4U CN204591784U (en) | 2015-03-19 | 2015-03-19 | Fan blade, blower fan and air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204591784U true CN204591784U (en) | 2015-08-26 |
Family
ID=53927943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520158385.4U Expired - Fee Related CN204591784U (en) | 2015-03-19 | 2015-03-19 | Fan blade, blower fan and air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204591784U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104763679A (en) * | 2015-03-19 | 2015-07-08 | 珠海格力电器股份有限公司 | Fan blade, draught fan and air conditioner |
| CN108843620A (en) * | 2018-06-06 | 2018-11-20 | 广州陈扬枝科技有限责任公司 | A kind of return channel blade and its design method |
-
2015
- 2015-03-19 CN CN201520158385.4U patent/CN204591784U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104763679A (en) * | 2015-03-19 | 2015-07-08 | 珠海格力电器股份有限公司 | Fan blade, draught fan and air conditioner |
| CN108843620A (en) * | 2018-06-06 | 2018-11-20 | 广州陈扬枝科技有限责任公司 | A kind of return channel blade and its design method |
| CN108843620B (en) * | 2018-06-06 | 2023-09-19 | 广州陈扬枝科技有限责任公司 | Reflux device blade and design method thereof |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150826 |
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| CF01 | Termination of patent right due to non-payment of annual fee |