CN107725475A - Leading edge slat formula centrifugal impeller and design method - Google Patents
Leading edge slat formula centrifugal impeller and design method Download PDFInfo
- Publication number
- CN107725475A CN107725475A CN201711008648.3A CN201711008648A CN107725475A CN 107725475 A CN107725475 A CN 107725475A CN 201711008648 A CN201711008648 A CN 201711008648A CN 107725475 A CN107725475 A CN 107725475A
- Authority
- CN
- China
- Prior art keywords
- leading edge
- impeller
- slat
- edge slat
- blade
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- F04D29/30—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
- F04D29/666—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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- 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
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
Abstract
The present invention relates to a kind of leading edge slat formula centrifugal impeller and design method, centrifuge blade leading edge position is formed by stacking by former and later two blades, wherein, front vane rotates 5 around fan shaft against impeller direction of rotation0~70Leading edge slat is formed, rear blade is primary blades, forms slat structure, and leading edge slat and primary blades are circumferentially evenly arranged as one group of blade.The present invention uses slat structure at centrifuge blade leading edge position, and air-flow is projected at a high speed through slat and blended with primary blades suction surface boundary-layer, the increase of boundary-layer kinetic energy, the enhancing of resistant to separation ability.In addition, leading edge slat arrangement has rectified action to impeller inlet air-flow so that into the air-flow in impeller channel evenly.Therefore, the flow separation in Centrifugal Fan Impeller runner can be suppressed using the design of leading edge slat formula centrifugal impeller, increase substantially aerodynamic performance and flow field quality.
Description
Technical field
The present invention relates to a kind of Centrifugal Fan Impeller, more particularly to a kind of leading edge slat formula centrifugal impeller and design side
Method.
Background technology
Centrifugal fan is a kind of ventilation equipment for being widely used in all trades and professions.During operation, air-flow passes through centrifugal impeller
Pressure and speed increase, are then discharged through spiral volute casing recovery section kinetic energy.Due to snail tongue and the interference effect of impeller, air-flow
Flow separation easily occurs when diffusion motion is done in impeller passage, declines aerodynamic efficiency.In order to control flow separation,
Researcher, which cracks blade in blade trailing edge, is divided into front and rear deviated splitter vane, so as to form lap gap, air-flow is made in pressure difference
Suction surface side is blowed to from pressure surface side through gap under, accelerates the blending of suction surface fluid, reaches and suppresses flow losses
Effect.Under normal circumstances, the flow separation in impeller channel occurs in trailing edge side, therefore is cracked in blade trailing edge and carry out flowing control
System, it is difficult to reach radical cure flow separation, improve the purpose of centrifugal fan aeroperformance.
The content of the invention
It is an object of the invention to overcome above-mentioned defect, there is provided a kind of highly efficient leading edge slat formula centrifugation leaf
Wheel and design method.
To achieve the above object, the technical scheme is that：A kind of leading edge slat formula centrifugal impeller, including centrifuge blade
Leading edge position, the centrifuge blade leading edge position are formed by stacking by former and later two blades, wherein, front vane is around fan shaft against leaf
Take turns direction of rotation rotation 50~70Leading edge slat is formed, rear blade is primary blades, forms slat structure, makes air-flow high through slat structure
Rapid fire goes out to be blended with primary blades suction surface boundary-layer, increases boundary-layer kinetic energy and resistant to separation ability, and the rectification of leading edge slat is made
With the air-flow for making to enter in impeller channel evenly；Leading edge slat and primary blades are circumferentially evenly arranged as one group of blade.
A kind of design method of leading edge slat formula centrifugal impeller, first, obtained using existing centrifugal fan design method
Impeller geometrical structure parameter, then in 25% ~ 40% times of leaf chord length location of C block blade center line to obtain forward and backward two sections of center lines,
Leading portion center line is extended into L=5%C；Then vane thickness is superimposed on two sections of center lines by selected thickness distribution rule, before and after acquisition
Two blades, front vane is rotated 5 around fan shaft against impeller direction of rotation0~70Leading edge slat is obtained, rear blade is then main lobe
Piece；Finally, leading edge slat and primary blades are circumferentially evenly arranged as one group, that is, obtain leading edge slat formula centrifugal impeller.
The beneficial effects of the present invention are：Slat structure is used at centrifuge blade leading edge position, air-flow is through the high rapid fire of slat
Go out and blended with primary blades suction surface boundary-layer, the increase of boundary-layer kinetic energy, the enhancing of resistant to separation ability.In addition, leading edge slat arrangement pair
Impeller inlet air-flow has rectified action so that into the air-flow in impeller channel evenly.Therefore, centrifuged using leading edge slat formula
Impeller Design can suppress the flow separation in Centrifugal Fan Impeller runner, increase substantially aerodynamic performance and flow field product
Matter.
Brief description of the drawings
Fig. 1 is the Centrifugal Fan Impeller structure sectional view of prior art；
Fig. 2 is Fig. 1 left view；
Fig. 3 is the leading edge slat formula centrifugal impeller structure schematic diagram of the present invention；
Fig. 4 is the leading edge slat formula centrifugal impeller shaping schematic view of the present invention.
Embodiment
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
Such as Fig. 1, shown in 2, existing centrifugal fan design method obtains impeller geometrical structure parameter, as impeller inlet and outlet are straight
Footpath D1、D2, number of blade Z, blade inlet and outlet laying angle β1AAnd β2AAnd blade center line.
As shown in figure 3, the leading edge slat formula centrifugal impeller of the present invention, centrifuge blade leading edge position is folded by former and later two blades
Add and form, wherein, front vane 1 rotates 5 around fan shaft relative to rear blade 2 against impeller direction of rotation0~70Leading edge slat is formed, after
Blade 2 is primary blades, forms slat structure, air-flow is projected through slat structure high-speed and is blended with primary blades suction surface boundary-layer,
Increase boundary-layer kinetic energy and resistant to separation ability, the rectified action of leading edge slat makes the air-flow entered in impeller channel evenly.Before
Edge slat and primary blades are circumferentially evenly arranged as one group of blade, form leading edge slat formula centrifugal impeller.
As shown in figure 4, the design method of the leading edge slat formula centrifugal impeller of the present invention, first, is divulged information using existing centrifugation
Machine design method obtains impeller geometrical structure parameter, then blocks blade center line in 25% ~ 40% times of leaf chord length location of C
It is about 5%C by leading portion center line proper extension L, L to forward and backward two sections of center lines, then by selected thickness distribution rule in two sections
Vane thickness is superimposed on line and obtains former and later two blades, by front vane 1 around fan shaft against impeller direction of rotation anglec of rotation θ
（50~70）Leading edge slat is obtained, rear blade 2 is then primary blades, finally, leading edge slat and rear blade 2 is circumferentially equal as one group
Even arrangement Z groups（Z is fan blade number）Leading edge slat formula centrifugal impeller is formed, as shown in Figure 3.
Claims (2)
1. a kind of leading edge slat formula centrifugal impeller, including centrifuge blade leading edge position, it is characterised in that：The centrifuge blade leading edge
Position is formed by stacking by former and later two blades, wherein, front vane rotates 5 around fan shaft against impeller direction of rotation0~70Before formation
Edge slat, rear blade are primary blades, form slat structure, air-flow is projected and the attached face of primary blades suction surface through slat structure high-speed
Layer blending, increase boundary-layer kinetic energy and resistant to separation ability, and the rectified action of leading edge slat makes the air-flow into impeller channel
Evenly；Leading edge slat and primary blades are circumferentially evenly arranged as one group of blade.
A kind of 2. design method of the leading edge slat formula centrifugal impeller described in claim 1, it is characterised in that：First, using existing
There is centrifugal fan design method to obtain impeller geometrical structure parameter, then in 25% ~ 40% times of leaf chord length location of C by blade
Line is blocked to obtain forward and backward two sections of center lines, and leading portion center line is extended into L=5%C；Then by selected thickness distribution rule in two sections
Vane thickness is superimposed on line, obtains former and later two blades, front vane is rotated 5 around fan shaft against impeller direction of rotation0~70
To leading edge slat, rear blade is then primary blades；Finally, leading edge slat and primary blades are circumferentially evenly arranged as one group, i.e.,
Obtain leading edge slat formula centrifugal impeller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711008648.3A CN107725475A (en) | 2017-10-25 | 2017-10-25 | Leading edge slat formula centrifugal impeller and design method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711008648.3A CN107725475A (en) | 2017-10-25 | 2017-10-25 | Leading edge slat formula centrifugal impeller and design method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107725475A true CN107725475A (en) | 2018-02-23 |
Family
ID=61213922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711008648.3A Pending CN107725475A (en) | 2017-10-25 | 2017-10-25 | Leading edge slat formula centrifugal impeller and design method |
Country Status (1)
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| CN (1) | CN107725475A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108980103A (en) * | 2018-06-13 | 2018-12-11 | 西安理工大学 | A kind of design method of the impeller of forward curved multi-blade centrifugal fan with import winglet |
| CN109026830A (en) * | 2018-08-16 | 2018-12-18 | 泛仕达机电股份有限公司 | A kind of centrifugal impeller |
| CN109931290A (en) * | 2019-05-07 | 2019-06-25 | 泛仕达机电股份有限公司 | A kind of backward centrifugal impeller |
| CN114688084A (en) * | 2022-05-23 | 2022-07-01 | 山东建筑大学 | Reverse lower-airfoil blade leading edge slotting configuration for reducing aerodynamic noise of centrifugal compressor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6139273A (en) * | 1998-04-22 | 2000-10-31 | Valeo Climate Control, Inc. | Radial flow fan |
| CN1560479A (en) * | 2004-02-23 | 2005-01-05 | 孙敏超 | Radial single raw blade diffuser |
| CN101135318A (en) * | 2006-08-31 | 2008-03-05 | 财团法人工业技术研究院 | Blade wheel structure and centrifugal fan device using the same |
| CN201148994Y (en) * | 2008-01-16 | 2008-11-12 | 天津内燃机研究所 | Mixed blade cooling fan |
| CN104329290A (en) * | 2014-10-29 | 2015-02-04 | 珠海格力电器股份有限公司 | Centrifugal fan and air conditioner with centrifugal fan |
-
2017
- 2017-10-25 CN CN201711008648.3A patent/CN107725475A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6139273A (en) * | 1998-04-22 | 2000-10-31 | Valeo Climate Control, Inc. | Radial flow fan |
| CN1560479A (en) * | 2004-02-23 | 2005-01-05 | 孙敏超 | Radial single raw blade diffuser |
| CN101135318A (en) * | 2006-08-31 | 2008-03-05 | 财团法人工业技术研究院 | Blade wheel structure and centrifugal fan device using the same |
| CN201148994Y (en) * | 2008-01-16 | 2008-11-12 | 天津内燃机研究所 | Mixed blade cooling fan |
| CN104329290A (en) * | 2014-10-29 | 2015-02-04 | 珠海格力电器股份有限公司 | Centrifugal fan and air conditioner with centrifugal fan |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108980103A (en) * | 2018-06-13 | 2018-12-11 | 西安理工大学 | A kind of design method of the impeller of forward curved multi-blade centrifugal fan with import winglet |
| CN108980103B (en) * | 2018-06-13 | 2020-04-21 | 西安理工大学 | Design method of forward multi-wing centrifugal ventilator impeller with inlet winglet |
| CN109026830A (en) * | 2018-08-16 | 2018-12-18 | 泛仕达机电股份有限公司 | A kind of centrifugal impeller |
| CN109931290A (en) * | 2019-05-07 | 2019-06-25 | 泛仕达机电股份有限公司 | A kind of backward centrifugal impeller |
| CN109931290B (en) * | 2019-05-07 | 2021-06-08 | 泛仕达机电股份有限公司 | Backward centrifugal impeller |
| CN114688084A (en) * | 2022-05-23 | 2022-07-01 | 山东建筑大学 | Reverse lower-airfoil blade leading edge slotting configuration for reducing aerodynamic noise of centrifugal compressor |
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Application publication date: 20180223 |
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