CN108386382B - 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
- Publication number
- CN108386382B CN108386382B CN201810157514.6A CN201810157514A CN108386382B CN 108386382 B CN108386382 B CN 108386382B CN 201810157514 A CN201810157514 A CN 201810157514A CN 108386382 B CN108386382 B CN 108386382B
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- Prior art keywords
- blade
- upper layer
- lower leave
- centrifugal fan
- impeller
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
- F04D29/282—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/30—Vanes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a kind of two-way multi-wing centrifugal fan impellers 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, each blade in the blade of upper layer is circumferentially, and upper layer blade and lower leave are radially symmetrical, and the stagger angle β of upper layer blade1It is 70 ° -90 °, the exit installation angle β of lower leave2It is 150 ° -180 °；Each blade in the blade of upper layer is forward curved vane, and each blade in lower leave is backward leaning vane, which 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 all generally existing lower problem of performance of the two-way centrifugal blower performance being currently embedded in bathroom air exchanging device, nothing
Method is compared with unidirectional fan.In today that heating ventilation industry increasingly minimizes product, positive reverse centrifuge wind has seriously been hindered
Application and development of the machine in air interchanger, promote its performance and are necessary.Wind wheel and air duct volume are identical unidirectional more at present
Wing 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 receives 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, a kind of two-way multi-wing centrifugal of single side air inlet is provided
Draught fan impeller, the impeller can effectively improve the air quantity of multi-wing centrifugal fan, reduce blade surface pressure fluctuation and leaf road
Eddy current crack.
In order to achieve the above objectives, the two-way multi-wing centrifugal fan impeller of single side air inlet of the present invention includes wheel disc and position
In lower leave, upper layer blade, the first wheel cap, the second wheel cap and third wheel cap on wheel disc, wherein the first wheel cap, lower layer's leaf
Piece, the second wheel cap, upper layer blade and third wheel cap are sequentially distributed from top to bottom, and the circumferentially cloth of each blade in lower leave
It sets, circumferentially, and upper layer blade and lower leave are radially symmetrical, and upper layer for each blade in the blade of upper layer
The stagger angle β of blade1It is 70 ° -90 °, the exit installation angle β of lower leave2It is 150 ° -180 °；Each leaf in the blade of upper layer
Piece 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 quantity of upper layer blade intra vane is 30-60 piece, and the quantity of lower leave intra vane is 30-60 piece.
Impeller is installed on the middle position in air duct in the two-way multi-wing centrifugal fan of single side air inlet.
The axial cross section contour line of 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.
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.
β1It is 70 °, β2It is 160 °, the height ratio k=0.85 of upper layer blade and lower leave.
The invention has the following advantages:
The two-way multi-wing centrifugal fan impeller of single side air inlet of the present invention 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 backward leaning vane, to rotate forward in motor
And forward curved vane pressure coefficient is high, discharge coefficient is big feature and backward leaning vane efficiency can be given full play in reversion process
The feature high, pressure coefficient is low and noise is small, makes multi-wing centrifugal fan aeroperformance get a promotion, while reducing blade surface
Pressure fluctuation and vortex tape flow noise, and make impeller positive and negative rotation that there is almost the same aeroperformance, meet in life
Actual demand, 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:
With reference to Fig. 3 and Fig. 4, the two-way multi-wing centrifugal fan impeller of single side air inlet of the present invention includes wheel disc 6 and position
In lower leave 4, upper layer blade 5, the first wheel cap 1, the second wheel cap 2 and third wheel cap 3 on wheel disc 6, wherein the first wheel cap 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 each leaf in lower leave 4
Circumferentially, circumferentially, and upper layer blade 5 and lower leave 4 are radially right for each blade in upper layer blade 5 for piece
Claim distribution, and the stagger angle β of upper layer blade 51It is 70 ° -90 °, the exit installation angle β of lower leave 42It is 150 ° -180 °；
Each blade in upper layer blade 5 is forward curved vane, and each blade in lower leave 4 is backward leaning vane.Preferably, β1For
70 °, β2It is 160 °, the height ratio k=0.85 of upper layer blade 5 and lower leave 4.
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
Using ANSYS-FLUENT commercial CFD software, numerical solution three-dimensional averaged Navier-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 are more from Domestic ventilation device
Wing centrifugal blower, the number of blade are 30, profile ID 130mm, impeller outer diameter 165mm, it is contemplated that blower interior flows horse
Conspicuous number is regarded as potential flows less than 0.3, and turbulence model is k- ε model.In equation is discrete, convective term is using high
Resolution format；Viscosity term uses second-order central format；Time-derivative item uses after second order to Euler scheme.The air interchanger mould
Type is single sided entry, while conditions setting for convenience, and the inlet and outlet section of blower is appropriately extended；Import is given total
Pressure is zero and axial admission condition, exit static pressure zero, and wall surface meets without slip boundary condition, and sound interface is according to multiple ginseng
Examining is the processing of (Multiple Reference Frame, MRF) method, and import basin and spiral case basin are all made of static coordinate
System, impeller basin is described using rotating coordinate system.By the mathematical calculation model, the multi-wing centrifugal fan of calculating is quiet in outlet
Maximum quantity of wind when pressure is zero, result are 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 170m3/ h, the present invention increase 35m compared to traditional centrifugal blower air quantity3/h。
Claims (7)
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)1It is 70 ° -90 °, lower leave (4)
Exit installation angle β2It is 150 ° -180 °；Each blade in upper layer blade (5) is forward curved vane, each in lower leave (4)
Blade is backward leaning vane.
2. the two-way multi-wing centrifugal fan impeller of single side air inlet according to claim 1, which is characterized in that upper layer blade (5)
Height ratio K with lower leave (4) is 0.6-1.
3. the two-way multi-wing centrifugal fan impeller of single side air inlet according to claim 1, which is characterized in that upper layer blade (5)
The quantity of intra vane is 30-60 piece, and the quantity of lower leave (4) intra vane is 30-60 piece.
4. the two-way multi-wing centrifugal fan impeller of single side air inlet according to claim 1, which is characterized in that impeller is installed on list
The middle position in air duct in the two-way multi-wing centrifugal fan of face air inlet.
5. the two-way multi-wing centrifugal fan impeller of single side air inlet according to claim 1, which is characterized in that upper layer blade (5)
Axial cross section contour line and the symmetrical mirror image of axial cross section contour line of lower leave (4) be distributed, and corresponding line of symmetry
For from the center of circle of impeller axial cross section to the line of wheel bottom endpoint.
6. the two-way multi-wing centrifugal fan impeller of single side air inlet according to claim 1, which is characterized in that setting: with the right hand
Rule is foundation, the direction for being axially directed to fan inlet with impeller is denoted as the direction that impeller rotates in the forward direction, conversely, being then denoted as leaf
Take turns the direction reversely rotated；Wherein, the performance of forward curved vane, upper layer blade can be presented when motor rotates forward for upper layer blade (5)
(5) performance of backward leaning vane can be presented in motor reversal；Backward leaning vane can be presented when motor rotates forward in lower leave (4)
Performance, the performance of forward curved vane can be presented in motor reversal lower leave (4).
7. the two-way multi-wing centrifugal fan impeller of single side air inlet according to claim 1, which is characterized in that β1It is 70 °, β2For
160 °, the height ratio k=0.85 of upper layer blade (5) and lower leave (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810157514.6A CN108386382B (en) | 2018-02-24 | 2018-02-24 | 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 |
|---|---|---|---|
| CN201810157514.6A CN108386382B (en) | 2018-02-24 | 2018-02-24 | A kind of two-way multi-wing centrifugal fan impeller of single side air inlet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108386382A CN108386382A (en) | 2018-08-10 |
| CN108386382B true CN108386382B (en) | 2019-10-11 |
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| CN201810157514.6A Active CN108386382B (en) | 2018-02-24 | 2018-02-24 | A kind of two-way multi-wing centrifugal fan impeller of single side air inlet |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109083865B (en) * | 2018-08-16 | 2023-08-22 | 泛仕达机电股份有限公司 | Forward multi-wing centrifugal fan and impeller thereof |
| CN111980941A (en) | 2019-05-23 | 2020-11-24 | 青岛海尔滚筒洗衣机有限公司 | Centrifugal fan and clothes dryer |
| WO2022060338A2 (en) * | 2020-09-17 | 2022-03-24 | Ciftci Nevzat | Engine with bidirectional impeller |
| US11723172B2 (en) * | 2021-03-05 | 2023-08-08 | Apple Inc. | Fan impeller with sections having different blade design geometries |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203879801U (en) * | 2014-06-04 | 2014-10-15 | 江苏友奥电器有限公司 | Double-suction type centrifugal fan blade |
| CN205351470U (en) * | 2016-02-22 | 2016-06-29 | 杭州奥普卫厨科技有限公司 | Can advance two -way fan and room heater of new trend |
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| CN108386382A (en) | 2018-08-10 |
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Effective date of registration: 20191213 Address after: 314000 Heng Gang Industrial Park, Bai Bu Town, Haiyan County, Jiaxing, Zhejiang Patentee after: Zhejiang Celebrity Technology Co., Ltd. Address before: Beilin District Xianning West Road 710049, Shaanxi city of Xi'an province No. 28 Patentee before: Xi'an Jiaotong University |
|
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Liu Xiaomin Inventor after: Xiong Zhongying Inventor after: Xu Ji Inventor before: Liu Xiaomin Inventor before: Xiong Zhongying |