CN207761991U - A kind of aerofoil fan - Google Patents
A kind of aerofoil fan Download PDFInfo
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- CN207761991U CN207761991U CN201721916976.9U CN201721916976U CN207761991U CN 207761991 U CN207761991 U CN 207761991U CN 201721916976 U CN201721916976 U CN 201721916976U CN 207761991 U CN207761991 U CN 207761991U
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- blade
- commutating zone
- aerofoil fan
- contour line
- commutating
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Abstract
The utility model is related to a kind of aerofoil fans, are related to air-conditioning and Refrigeration Engineering technical field, solve the big technical problem of aerofoil fan noise existing in the prior art.A kind of aerofoil fan of the utility model, including wheel hub and blade, the thickness of blade everywhere can be made different by the way that the first rectification with and the second rectification with is arranged, to the intensity of blade different parts, since the first rectification with and the second rectification with extend along the root of blade to taper, therefore the intensity of the inlet section (i.e. front edge area) of blade is reinforced, keep the deformation quantity of fan blade in high-speed rotation smaller, so as to improve the stream condition of entrance blade, make each blade flow into the disorderly of air to reduce, inflow air into each blade is smooth, the wild effects such as air stripping and stall when the tail portion of blade not will produce substantially when therefore turning round, the noise of fan can be effectively reduced.
Description
Technical field
The utility model is related to air-conditioning and Refrigeration Engineering technical field, a kind of particularly aerofoil fan.
Background technology
With the continuous improvement of living standards, air conditioner is becoming increasingly popular.Consumer wants quality, the performance of air conditioner
Ask also higher and higher.Currently, air-conditioner outdoor unit generally existing noise is larger, which is mainly made an uproar by noise of motor and wind turbine
Sound forms.Due to air-conditioner outdoor unit generally use aerofoil fan carry out forced-convection heat transfer, fan noise be usually by
What aerofoil fan generated.Existing fan generally by the relatively thin of the thickness of blade design, and leads to leaf to reduce manufacturing cost
The intensity of piece is poor, when in use, especially fan when high temperature and high speed rotates, deformation it is more serious, to make air-flow with
Blade surface detaches, and then forms vortex or turbulent flow, and fan is made to generate loud noise；And rotating speed is faster, the deflection of blade
Bigger, it is bigger to may result in noise, and air quantity does not dramatically increase.
Utility model content
The utility model provides a kind of aerofoil fan, the skill big for solving aerofoil fan noise existing in the prior art
Art problem.
The utility model provides a kind of aerofoil fan, including wheel hub and is arranged more on the outer circumference surface of the wheel hub
The edge of a blade, the blade is provided with the first commutating zone, and first commutating zone is extended to by the root of the blade
Taper；
The second commutating zone, second commutating zone are provided between first commutating zone and the leading edge sideline of the blade
Extending direction it is identical as the extending direction of the first commutating zone.
In one embodiment, it is provided with third rectification between first commutating zone and the leading edge sideline of the blade
Band, the third commutating zone are extended the root of the blade by the leading edge sideline of the blade；
The third commutating zone has one section of identical side with first commutating zone.
In one embodiment, second commutating zone is close to the end of the wheel hub and third commutating zone phase
It hands over.
In one embodiment, the blade operates 120-240 hours under conditions of rotating speed is 800-1100rpm
Afterwards, the deformation quantity of the blade tips is less than 1.3%.
In one embodiment, first commutating zone is configured to arc groove, constitutes first commutating zone both sides
Contour line be concentric circular arc.
In one embodiment, second commutating zone is configured to groove, constitutes the of second commutating zone both sides
One contour line and the second contour line are connected by the curve smoothing transition of different curvature radius respectively.
In one embodiment, in the first contour line in the difference and the second contour line of the radius of curvature of different curves
The difference of the radius of curvature of homologous thread is equal.
In one embodiment, the third commutating zone is configured to groove, and the bottom surface of the third commutating zone is not by existing
Multiple faces on same plane are constituted.
In one embodiment, be additionally provided with the 4th commutating zone on the blade, the 4th commutating zone be configured to by
The root of the blade extends to the groove of the trailing edge of the blade.
In one embodiment, for connect the contour line of the blade trailing edge and the blade tips contour line it
Between fillet be 1-2mm；The fillet between contour line and the contour line of the blade inlet edge for connecting the blade tips
For 7-8mm.
Compared with prior art, the utility model has the advantage of：By the way that the first commutating zone and the second commutating zone energy is arranged
Enough make the thickness of blade everywhere different, to the intensity of blade different parts, due to the equal edge in the first commutating zone and the second commutating zone
The root of blade to taper extends, therefore the intensity of the inlet section (i.e. front edge area) of blade is reinforced, and fan is made to turn in high speed
The deformation quantity of blade is smaller when dynamic, so as to improve the stream condition of blade is entered, make each blade flow into air it is disorderly reduce, into
The inflow air for entering each blade is smooth, thus when turning round blade tail portion when not will produce substantially air stripping and stall etc. it is unstable
Determine phenomenon, the noise of fan can be effectively reduced.
Description of the drawings
Hereinafter the utility model will be described in more detail based on the embodiments and with reference to the accompanying drawings.
Fig. 1 is the front view of the embodiments of the present invention axis flow fan；
Fig. 2 is the structural schematic diagram of the first commutating zone in the embodiments of the present invention.
In the accompanying drawings, identical component uses identical reference numeral.Attached drawing is not drawn according to actual ratio.
Reference numeral：
1- wheel hubs；2- blades；The first commutating zones 3-；
The second commutating zones 4-；5- thirds commutating zone；The 4th commutating zones 6-；
41- first contour lines；42 second contour lines.
Specific implementation mode
Below in conjunction with attached drawing, the utility model is described in further detail.
As illustrated in fig. 1 and 2, the utility model provides a kind of aerofoil fan, including wheel hub 1 and is arranged in the outer of wheel hub 1
Multiple blades 2 on periphery, it is preferable that the quantity of blade 2 is 3-6 pieces, and blade 2 is uniformly distributed on wheel hub 1.
There are 3 blades 2 with aerofoil fan below, and its direction of rotation be clockwise for illustrate, i.e. axis stream wind
When fan rotation, air is flowed into from the leading edge of blade 2, is blown out from the trailing edge of blade 2 after blade face is boosted；The root of blade 2 is
The taper at the position being connected with wheel hub 1, blade 2 is the position opposite with root.
It should be noted that in fig. 1 and 2, different dash areas is only used for distinguishing different commutating zones, not pair
Axial flow blower carries out cutting and generates.
The edge of blade 2 is provided with the first commutating zone 3, and the first commutating zone 3 extends to taper by the root of blade 1；The
The second commutating zone 4, the extending direction and first of the second commutating zone 4 are provided between one commutating zone 3 and the leading edge sideline of blade 2
The extending direction of commutating zone 3 is identical.
Further, third commutating zone 5, third commutating zone are provided between the first commutating zone 3 and the leading edge sideline of blade 2
5 by blade 2 leading edge sideline extended blade 1 root；Third commutating zone 5 and the first commutating zone 3 have one section of identical side
Side.
Further, the second commutating zone 4 is intersected close to the end of wheel hub 1 with third commutating zone 5.
Due to being respectively provided with the first commutating zone 3, the second commutating zone 4 and third commutating zone 5 on blade 2, enough make
The thickness of blade everywhere is different, to the intensity of blade different parts；And before three above-mentioned commutating zones are close to blade 2
Edge region, therefore the intensity of the i.e. front edge area of blade is reinforced, and keeps the deflection of fan blade in high-speed rotation smaller.
Specifically, after blade 2 operates 120-240 hours under conditions of rotating speed is 800-1100rpm, 2 taper of blade
Deformation quantity is less than 1.3%.
In order to illustrate the influence that above-mentioned commutating zone generates the deformation quantity of blade 2, by following experimental data come specifically
It is bright.Respectively with the aerofoil fan with above-mentioned commutating zone and the aerofoil fan without above-mentioned commutating zone different conditions into
Row test, wherein the radius R of aerofoil fanDFor 322mm (error is within the scope of positive and negative 0.25mm).
Three different parts (being both ends and intermediate position respectively) are chosen respectively in the taper of blade 2 respectively to measure,
The radius of three above-mentioned different parts after blade 2 deforms uses R respectivelyA、RBAnd RCIt indicates, corresponding deformation quantity difference
Use SA、SBAnd SCIt indicates.
Wherein, the calculation formula of deformation quantity is as follows：
As shown in table 1, the parameter comparison between the aerofoil fan of the utility model and existing aerofoil fan is listed.
1 the utility model embodiment axis flow fan of table is compared with existing aerofoil fan test data
Condition 1 in above-mentioned table 1 is：60 DEG C of environment temperature, rotating speed n=800rpm, operating 120h；
Condition 2 is：60 DEG C of environment temperature, rotating speed n=900rpm, operating 200h；
Condition 3 is：60 DEG C of environment temperature, rotating speed n=1100rpm, operating 240h.
It can be seen that the deformation quantity smaller of the aerofoil fan with commutating zone by above-mentioned experimental data, and can be also found that leaf
Deformation quantity smaller of the deformation quantity at 2 intermediate position of piece compared with two-end part.
When aerofoil fan high speed rotation, if the deformation quantity of blade 2 is smaller, then the air-flow into blade 2 will be improved
State makes each blade 2 flow into the disorderly of air and reduces, and the inflow air into each blade 2 will be smoother, therefore leaf when revolution
The wild effects such as air stripping and stall when the tail portion of piece 2 not will produce substantially.Therefore by the way that rectification is arranged on blade 2
Band can make the deformation quantity smaller of blade 2, and then reduce the noise of aerofoil fan.
In one embodiment of the utility model, the first commutating zone 3 is configured to arc groove, constitutes the first commutating zone 3
The contour line of both sides is concentric circular arc.
Specifically, as shown in Fig. 2, the contour line for constituting 3 both sides of the first commutating zone is S11 and S12, the wherein radius of S11
R11 is 213.7mm, and the radius R12 of S12 is 204.7mm.
Using the center of wheel hub 1 as origin, horizontal line is X-axis, and vertical line is that Y-axis establishes rectangular coordinate system, S11 and S12's
Center of circle P1 coordinates are (152.8, -44.7).
Further, the second commutating zone 4 is configured to groove, constitutes the first contour line 41 and the of 4 both sides of the second commutating zone
Two contour lines 42 are connected by the curve smoothing transition of different curvature radius respectively.
The difference of the radius of curvature of different curves song curvature of a curve different from the second contour line 42 is partly in first contour line 41
The difference of diameter is equal.
As shown in Fig. 2, first contour line 41 is made of three sections of curves that radius of curvature is R411, R412 and R413, justify
The heart is respectively P3, P4 and P5；Second contour line 42 is made of three sections of curves that radius of curvature is R421, R422 and R423, is justified
The heart is respectively P3, P4 and P5.
Wherein, R411=245.9mm, R412=267.4mm, R413=759.5；R421=224.4, R422=245.9,
R423=738.9.In addition, the coordinate of P3 is (- 171, -75.7)；The coordinate of P3 is (- 189.9, -65.3)；The coordinate of P5 is
(- 457.2,347.8).
Therefore, first contour line 41 and the radius of curvature of the second contour line 42 meet following definition formula：
R412-R411=R422-R421=21.5；
R413-R412=R423-R422=492.1.
In addition, the difference of the radius of curvature of corresponding curve is homogeneous on curve and the second contour line 42 in first contour line 41
Deng that is,：
R411-R421=R412-R422=R413-R423=21.5.
As shown in Figure 1, third commutating zone 5 is configured to groove, the bottom surface of third commutating zone 5 is by not in the same plane more
A face is constituted.
In one embodiment of the utility model, the 4th commutating zone 6, the 4th commutating zone 6 construction are additionally provided on blade 2
For extended to by the root of blade 2 blade 2 trailing edge groove.Wherein, the contour line for constituting 8 both sides of the second commutating zone can be by more
Section curve or straight line are formed by connecting, and the fillet of connecting place is 5mm.
With the outer diameter D of aerofoil fan for 644 ± 0.5mm, the diameter d of wheel hub 1 is 190 ± 0.6mm, the width b of blade 2
For 240 ± 1mm, the technique effect of the utility model is described in detail by following experimental data.
As shown in table 2, the aerofoil fan and existing aerofoil fan for listing the utility model (it is new not have this practicality
Commutating zone described in type) between parameter comparison.
2 the utility model embodiment axis flow fan of table is compared with existing aerofoil fan test data
According to 2 data comparison of table, it can be seen that using the air-conditioning of the aerofoil fan of the utility model, air quantity is big, low noise.
Although the present utility model has been described by reference to the preferred embodiments, but in the model for not departing from the utility model
In the case of enclosing, various improvement can be carried out to it and can replace component therein with equivalent.Especially, as long as not depositing
In structural conflict, items technical characteristic mentioned in the various embodiments can be combined in any way.The utility model
It is not limited to specific embodiment disclosed herein, but includes all technical solutions fallen within the scope of the appended claims.
Claims (10)
1. a kind of aerofoil fan, which is characterized in that including wheel hub (1) and be arranged on the outer circumference surface of the wheel hub (1)
The edge of multiple blades (2), the blade (2) is provided with the first commutating zone (3), and first commutating zone (3) is by the leaf
The root of piece (2) extends to taper；
It is provided with the second commutating zone (4) between first commutating zone (3) and the leading edge sideline of the blade (2), described second
The extending direction of commutating zone (4) is identical as the extending direction of the first commutating zone (3).
2. aerofoil fan according to claim 1, which is characterized in that first commutating zone (3) and the blade (2)
Third commutating zone (5) is provided between leading edge sideline, the third commutating zone (5) is extended by the leading edge sideline of the blade (2)
The root of the blade (2)；
The third commutating zone (5) has one section of identical side with first commutating zone (3).
3. aerofoil fan according to claim 2, which is characterized in that second commutating zone (4) is close to the wheel hub (1)
End intersect with the third commutating zone (5).
4. aerofoil fan according to any one of claim 1-3, which is characterized in that the blade (2) is in rotating speed
After being operated 120-240 hours under conditions of 800-1100rpm, the deformation quantity of blade (2) taper is less than 1.3%.
5. aerofoil fan according to claim 4, which is characterized in that first commutating zone (3) is configured to arc groove,
The contour line for constituting the first commutating zone (3) both sides is concentric circular arc.
6. aerofoil fan according to claim 4, which is characterized in that second commutating zone (4) is configured to groove, constitutes
The first contour line (41) and the second contour line (42) of second commutating zone (4) both sides are respectively by the curve of different curvature radius
It is connected smoothly.
7. aerofoil fan according to claim 6, which is characterized in that the song of different curves on the first contour line (41)
The difference of radius of curvature of homologous thread is equal in the difference of rate radius and the second contour line (42).
8. aerofoil fan according to claim 2 or 3, which is characterized in that the third commutating zone (5) is configured to groove,
The bottom surface of the third commutating zone (5) is made of multiple faces not in the same plane.
9. aerofoil fan according to claim 4, which is characterized in that be additionally provided with the 4th commutating zone on the blade (2)
(6), the 4th commutating zone (6) is configured to extend to the groove of the trailing edge of the blade (2) by the root of the blade (2).
10. aerofoil fan according to claim 4, which is characterized in that the profile for connecting the blade (2) trailing edge
Fillet between line and the contour line of the blade (2) taper is 1-2mm；Contour line for connecting the blade (2) taper
Fillet between the blade (2) up-front contour line is 7-8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721916976.9U CN207761991U (en) | 2017-12-31 | 2017-12-31 | A kind of aerofoil fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721916976.9U CN207761991U (en) | 2017-12-31 | 2017-12-31 | A kind of aerofoil fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207761991U true CN207761991U (en) | 2018-08-24 |
Family
ID=63186388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721916976.9U Active CN207761991U (en) | 2017-12-31 | 2017-12-31 | A kind of aerofoil fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207761991U (en) |
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2017
- 2017-12-31 CN CN201721916976.9U patent/CN207761991U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191211 Address after: No.218, Qianwan Port Road, Qingdao Economic and Technological Development Zone, Qingdao, 266000, Shandong Province Patentee after: Qingdao Hisense Hitachi Air-Condition System Co., Ltd. Address before: 266114 Shandong city of Qingdao province in the Red Island Economic Zone Zhao Jia Ling Street Community Patentee before: Qingdao Zhong Li blower fan Co., Ltd |