CN109915409A - A kind of two-way multi-wing centrifugal fan impeller of single side air inlet - Google Patents
A kind of two-way multi-wing centrifugal fan impeller of single side air inlet Download PDFInfo
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- CN109915409A CN109915409A CN201910310157.7A CN201910310157A CN109915409A CN 109915409 A CN109915409 A CN 109915409A CN 201910310157 A CN201910310157 A CN 201910310157A CN 109915409 A CN109915409 A CN 109915409A
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Abstract
A kind of two-way multi-wing centrifugal fan impeller of single side air inlet, lower leave, upper layer blade, the first wheel cap, the second wheel cap and third wheel cap including wheel disc and on wheel disc, wherein, first wheel cap, lower leave, the second wheel cap, upper layer blade and third wheel cap are sequentially distributed from top to bottom, and each blade in lower leave is circumferentially, circumferentially, and upper layer blade and lower leave are radially symmetrical, and the stagger angle β of upper layer blade for each blade in the blade of upper layer1For 70o-90o, the exit installation angle β of lower leave2For 150o-180o；Each blade in the blade of upper layer is forward curved vane, and each blade in lower leave is backward leaning vane；The height of upper layer blade and lower leave ratio K is 0.6-1；The features such as it has structure simple, can effectively improve the air quantity of multi-wing centrifugal fan, reduces the eddy current crack in blade surface pressure fluctuation and leaf road.
Description
Technical field
The invention belongs to bathroom air exchanging technical fields, are related to a kind of two-way multi-wing centrifugal fan impeller of single side air inlet.
Background technique
The lower problem of the generally existing performance of two-way centrifugal blower being currently embedded in bathroom air exchanging device, can not and it is single
It is compared to blower.In today that heating ventilation industry increasingly minimizes product, positive and negative two-way centrifugal blower has seriously been hindered
Application and development in air interchanger, promote its performance and are necessary.Wind wheel and the identical unidirectional multiple wing of air duct volume at present
Centrifugal blower performance is than two-way big 1 times or more.
Have the characteristics that discharge coefficient is big, pressure coefficient is high and compact-sized in view of multi-wing centrifugal fan, in industrial products
Middle acquirement extensive use, is furthermore also widely used in the electric household appliances such as Domestic ventilation device.Its structure includes motor, snail
Shell and impeller.At present for ventilation device structure in bathroom, as shown in Figures 1 and 2, it is desirable that multiple wing inside air interchanger from
Heart draught fan impeller rotate forward when by right-side outlet to interior air blowing come the air in circulating bathroom, right side air-out mouth be referred to as take a breath
Mouthful, by ptc heater heating air when reversion and blowing out warm wind in left side outlet increases room temperature, on the left of air outlet be referred to as to dry
Mouthful.It is therefore desirable to which impeller has the ability of positive and negative rotation, while guaranteeing that the air quantity rotated and reverse is equal as far as possible, this becomes
Promote the difficult point of the two-way ventilating device aeroperformance.Current this two-way multi-wing centrifugal fan impeller blade mostly uses greatly radial direction
Blade, i.e. blade middle line are overlapped to guarantee that the air quantity rotated and reverse is equal with impeller radial direction.The wind of this blade impeller
Amount is smaller, and pressure coefficient is lower, and pressure under the same conditions is just able to achieve using high revolving speed or large impeller diameter, and is increased
Impeller diameter will receive the limitation in space, improves revolving speed and increases noise again, and in the Ye Daonei of blade, since flow blockage is tight
Weight, vortex easy to form influences blower outlet air, and due to the presence of whirlpool, increases the eddy current crack of blower.
Summary of the invention
It is an object of the invention to overcome the above-mentioned prior art, it is simple to provide a kind of structure, can be effective
The air quantity of multi-wing centrifugal fan is improved, the two-way multiple wing of single side air inlet of the eddy current crack in blade surface pressure fluctuation and leaf road is reduced
Centrifugal blower fan blade wheel.
The object of the present invention is achieved by the following technical solutions, the two-way multi-wing centrifugal fan of single side air inlet
Impeller includes wheel disc and lower leave, upper layer blade, the first wheel cap, the second wheel cap and third wheel cap on wheel disc,
In, the first wheel cap, lower leave, the second wheel cap, upper layer blade and third wheel cap are sequentially distributed from top to bottom, and in lower leave
Each blade circumferentially, each blade in the blade of upper layer circumferentially, and upper layer blade and lower leave radially side
To symmetrical, and the stagger angle β of upper layer blade1For 70o-90o, the exit installation angle β of lower leave2For 150o-180
º；Each blade in the blade of upper layer is forward curved vane, and each blade in lower leave is backward leaning vane；Upper layer blade is under
The height ratio K of layer blade is 0.6-1, the total high 70-90mm of impeller.
As preferred: the quantity of the upper layer blade intra vane is 30-60 piece, and the quantity of lower leave intra vane is 30-
60；The axial cross section contour line of the upper layer blade and the symmetrical mirror image of the axial cross section contour line of lower leave are distributed,
And corresponding line of symmetry is from the center of circle of impeller axial cross section to the line of wheel bottom endpoint；The stagger angle β1For
70o, exit installation angle β2For 160o, height ratio k=0.85 of upper layer blade and lower leave, the total high 70-90mm of impeller.
It sets: using the right-hand rule as foundation, the direction for being axially directed to fan inlet with impeller being denoted as impeller and is rotated in the forward direction
Direction, conversely, be then denoted as impeller reverse rotation direction；Wherein, antecurvature leaf can be presented when motor rotates forward in upper layer blade
The performance of backward leaning vane can be presented in motor reversal for the performance of piece, upper layer blade；Lower leave can when motor rotates forward
The performance of backward leaning vane is presented, the performance of forward curved vane can be presented in motor reversal for lower leave.
The invention has the following advantages: the two-way multi-wing centrifugal fan impeller of the single side air inlet includes upper layer blade
And lower leave, wherein each blade in the blade of upper layer uses forward curved vane, and each blade in lower leave uses rear curved leaf
Piece, so that the feature that forward curved vane pressure coefficient is high, discharge coefficient is big can be given full play in motor rotating forward and reversion process,
And the feature that backward leaning vane is high-efficient, pressure coefficient is low and noise is small, so that multi-wing centrifugal fan aeroperformance is got a promotion, together
When reduce blade surface pressure fluctuation and vortex tape flow noise, and make impeller positive and negative rotation have almost the same pneumatic property
Can, meet the actual demand in life, structure is simple, and practicability is extremely strong.
Detailed description of the invention
Fig. 1 is the oblique sectional view of existing bathroom air exchanging device；
Fig. 2 is the schematic diagram of existing bathroom air exchanging device multi-wing centrifugal fan impeller；
Fig. 3 is structural schematic diagram of the invention；
Fig. 4 is side view of the invention；
Fig. 5 is the comparison diagram of upper layer blade 5 and 4 cross-sectional profiles of lower leave of the present invention；
Fig. 6 is the structural schematic diagram based on two-way multi-wing centrifugal fan of the invention；
Fig. 7 is the cross-sectional view based on two-way multi-wing centrifugal fan of the invention.
Wherein, 1 it is the first wheel cap, 2 be the second wheel cap, 3 be third wheel cap, 4 be lower leave, 5 be upper layer blade, 6 is
Wheel disc.
Specific embodiment
The invention will be described in further detail with reference to the accompanying drawing: referring to Fig. 3-7, single side air inlet of the present invention is double
It include wheel disc 6 and lower leave 4, upper layer blade 5, the first wheel cap 1, on wheel disc 6 to multi-wing centrifugal fan impeller
Two wheel caps 2 and third wheel cap 3, wherein the first wheel cap 1, lower leave 4, the second wheel cap 2, upper layer blade 5 and third wheel cap 3 are certainly
Top to bottm is sequentially distributed, and each blade in lower leave 4 is circumferentially, each blade in upper layer blade 5 circumferentially,
And upper layer blade 5 and lower leave 4 are radially symmetrical, and the stagger angle β of upper layer blade 51For 70o-90o,
The exit installation angle β of lower leave 42For 150o-180o；Each blade in upper layer blade 5 is forward curved vane, lower leave 4
In each blade be backward leaning vane.Preferably, β1For 70o, β2For 160o, the height ratio k of upper layer blade 5 and lower leave 4=
0.85, the total high 70-90mm of impeller.
The height ratio K of upper layer blade 5 and lower leave 4 is 0.6-1；The quantity of 5 intra vane of upper layer blade is 30-60 piece,
The quantity of 4 intra vane of lower leave is 30-60 piece；The axial cross section contour line of upper layer blade 5 and the axial cross of lower leave 4
The symmetrical mirror image distribution of cross section contour, and corresponding line of symmetry is from the center of circle of impeller axial cross section to wheel bottom endpoint
Line.
It sets: using the right-hand rule as foundation, the direction for being axially directed to fan inlet with impeller being denoted as impeller and is rotated in the forward direction
Direction, conversely, be then denoted as impeller reverse rotation direction；Wherein, antecurvature leaf can be presented when motor rotates forward in upper layer blade 5
The performance of backward leaning vane can be presented in motor reversal for the performance of piece, upper layer blade 5；The energy when motor rotates forward of lower leave 4
The performance of backward leaning vane is enough presented, the performance of forward curved vane can be presented in motor reversal for lower leave 4.
With reference to Fig. 3 and Fig. 4, the upper layer blade 5 is close to collector, and lower leave 4 is close to motor.
With reference to Fig. 6 and Fig. 7, impeller is installed on the middle position in air duct in the two-way multi-wing centrifugal fan of single side air inlet, double
It is located at the front of impeller, and blowing mouth from the spacing between blowing mouth and ventilation mouth and impeller to multi-wing centrifugal fan and ventilation mouth
It is identical.
Emulation experiment: ANSYS-FLUENT commercial CFD software, numerical solution three-dimensional Reynolds average Navier- are utilized
Stokes equation group, the air quantity of the comparative analysis single side air inlet two-way multi-wing centrifugal fan impeller and radial impeller, model come from
Domestic ventilation device multi-wing centrifugal fan, the number of blade are 30, profile ID 130mm, impeller outer diameter 165mm, it is contemplated that
Blower interior flows Mach number less than 0.3, is regarded as potential flows, and turbulence model is k- ε model.It is discrete in equation
In, convective term uses high resolution scheme；Viscosity term uses second-order central format；Time-derivative item uses after second order to Euler's lattice
Formula.The air interchanger model is single sided entry, while conditions setting for convenience, and it is appropriate to carry out to the inlet and outlet section of blower
Extend；It is zero and axial admission condition that import, which gives stagnation pressure, exit static pressure zero, and wall surface meets without slip boundary condition, sound
Interface is handled according to Moving reference (Multiple Reference Frame, MRF) method, and import basin and spiral case stream
Domain is all made of rest frame, and impeller basin is described using rotating coordinate system.
By the mathematical calculation model, maximum quantity of wind of the multi-wing centrifugal fan of calculating when exit static pressure is zero, as a result
To use the air quantity of the two-way multi-wing centrifugal fan of single side air inlet of the invention for 205m3/ h, and use the air quantity under radial blade
For 170 m3/ h, the present invention increase 35m compared to traditional centrifugal blower air quantity3/h。
Claims (2)
1. a kind of two-way multi-wing centrifugal fan impeller of single side air inlet, which is characterized in that including wheel disc (6) and be located at wheel disc (6)
On lower leave (4), upper layer blade (5), the first wheel cap (1), the second wheel cap (2) and third wheel cap (3), wherein the first round
Lid (1), lower leave (4), the second wheel cap (2), upper layer blade (5) and third wheel cap (3) are sequentially distributed from top to bottom, and lower layer
Each blade in blade (4) circumferentially, each blade in upper layer blade (5) circumferentially, and upper layer blade (5) and under
Layer blade (4) is radially symmetrical, and the stagger angle β of upper layer blade (5)1For 70o-90o, lower leave (4)
Exit installation angle β2For 150o-180o；Each blade in upper layer blade (5) is forward curved vane, each in lower leave (4)
Blade is backward leaning vane；The height ratio K of upper layer blade (5) and lower leave (4) is 0.6-1, the total high 70-90mm of impeller.
2. the two-way multi-wing centrifugal fan impeller of single side air inlet according to claim 1, which is characterized in that the upper layer blade
(5) quantity of intra vane is 30-60 piece, and the quantity of lower leave (4) intra vane is 30-60 piece；The axis of the upper layer blade (5)
The symmetrical mirror image of axial cross section contour line to cross-sectional profiles line and lower leave (4) is distributed, and corresponding line of symmetry be from
Line of the center of circle of impeller axial cross section to wheel bottom endpoint；The stagger angle β1For 70o, exit installation angle β2For
160o, height ratio k=0.85 of upper layer blade (5) and lower leave (4), the total high 70-90mm of impeller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910310157.7A CN109915409A (en) | 2019-04-17 | 2019-04-17 | A kind of two-way multi-wing centrifugal fan impeller of single side air inlet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910310157.7A CN109915409A (en) | 2019-04-17 | 2019-04-17 | A kind of two-way multi-wing centrifugal fan impeller of single side air inlet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109915409A true CN109915409A (en) | 2019-06-21 |
Family
ID=66977607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910310157.7A Withdrawn CN109915409A (en) | 2019-04-17 | 2019-04-17 | A kind of two-way multi-wing centrifugal fan impeller of single side air inlet |
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| Country | Link |
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| CN (1) | CN109915409A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022060338A3 (en) * | 2020-09-17 | 2022-05-19 | Ciftci Nevzat | Engine with bidirectional impeller |
-
2019
- 2019-04-17 CN CN201910310157.7A patent/CN109915409A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022060338A3 (en) * | 2020-09-17 | 2022-05-19 | Ciftci Nevzat | Engine with bidirectional impeller |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190621 |
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| WW01 | Invention patent application withdrawn after publication |