CN106762827A - A kind of asymmetric S types airfoil fan and its design and application process - Google Patents
A kind of asymmetric S types airfoil fan and its design and application process Download PDFInfo
- Publication number
- CN106762827A CN106762827A CN201611165663.4A CN201611165663A CN106762827A CN 106762827 A CN106762827 A CN 106762827A CN 201611165663 A CN201611165663 A CN 201611165663A CN 106762827 A CN106762827 A CN 106762827A
- Authority
- CN
- China
- Prior art keywords
- blade
- asymmetric
- types
- airfoil fan
- airfoil
- 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
-
- 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
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/38—Blades
- F04D29/384—Blades characterised by form
- F04D29/386—Skewed blades
-
- 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
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
-
- 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
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/38—Blades
- F04D29/388—Blades characterised by construction
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
- F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2250/00—Arrangements for modifying the flow of the heat exchange media, e.g. flow guiding means; Particular flow patterns
- F28F2250/08—Fluid driving means, e.g. pumps, fans
Abstract
The invention discloses a kind of asymmetric S types airfoil fan and its design and application process, comprising：First blade, the second blade, the trailing edge of first blade is connected with the trailing edge of second blade；First blade is the back draught guide frame of 180 ° of rotation after second blade integrally reduces.Above-mentioned asymmetric S types airfoil fan as reversible axial flow blower impeller blade, its reversion inverted ventilation base station heat exchange of heat pipe is purged；It rotates forward righteous style and practice makes base station heat exchange of heat pipe radiate.The present invention has reduction incidence loss, reduces contrary wind air-flow vortex phenomenon, lifts the performance of ventilating of reversible axial flow blower, greatly increases the advantage of reverse flow efficiency.
Description
Technical field
The present invention relates to a kind of blade, more particularly to a kind of asymmetric S types airfoil fan suitable for reversible axial flow blower
With the design and methods for using them of this blade.
Background technology
The communication base station of operator is distributed in the wide geographic areas such as city and rural area.Base station heat exchange of heat pipe is used as base station air conditioner
Important energy-saving equipment, have every year the substantial amounts of time operation, and heat exchanger due to dust blocking the problems such as, cause heat exchange
Device efficiency is decreased obviously, it is necessary to attendant carries out on-site maintenance and cleaning, forms substantial amounts of manpower consumption.It is big for this kind of
The occasion of the low blast of air quantity typically uses axial flow blower, generally from conventional axial flow blower, this kind of axial flow blower only one direction
Air-supply, it is impossible to realize reversion inverted ventilation；And full symmetric S types blade efficiency in the case of righteous style and practice, inverted ventilation has in the prior art
Decline.
Therefore, the typical load for communication base station is, it is necessary to design a asymmetric S airfoil fans, and then utilize this leaf
A reversible fan that can realize inverting inverted ventilation of piece design, and reversible axial flow blower is applied to base station heat exchange of heat pipe pair sets
It is standby to be timed purging；Realize that heat exchange and equipment purge two functions；And realize motor positive and inverse journey from DC speed-regulating motor
Sequence is designed.
The content of the invention
It is an object of the invention to provide a kind of asymmetric S airfoil fans and design and application process, it goes for can
Inverse axial flow blower, realizes reducing incidence loss, reduces contrary wind air-flow vortex phenomenon, lifts the performance of ventilating of reversible axial flow blower,
Greatly increase the purpose of reverse flow efficiency.
In order to realize the above object the present invention is achieved by the following technical solutions：
A kind of asymmetric S types airfoil fan, comprising：First blade, the second blade, the trailing edge of first blade with it is described
The trailing edge connection of the second blade；First blade is that the back draught of 180 ° of rotation after second blade integrally reduces is oriented to
Structure.
Preferably, first blade is 0.6 times of second blade.
Preferably, the exterior region of second blade encircles with the exterior region of first blade towards opposite direction, makes
The mean camber line of asymmetric S types airfoil fan is S-shaped.
Preferably, the chord length such as the asymmetric S types airfoil fan and airfoil fan of the model NACA2412.
Preferably, first blade is parallel to each other with the chord length of the second blade.
A kind of reversible axial flow blower, comprising：Impeller；The impeller is further included：
Above-mentioned asymmetric S types airfoil fan, wheel hub and impeller outer rim；Multiple asymmetric S types airfoil fan rings
Around being arranged between the wheel hub and impeller outer rim, the leading edge of second blade is connected with the wheel hub；First leaf
The leading edge of piece is connected with the impeller outer rim.
Preferably, the chord length of the asymmetric S types airfoil fan is 70.4mm.
A kind of method for designing of above-mentioned asymmetric S types airfoil fan, comprises the steps of：Two original blades are chosen, will
The integrally similar diminution of one of them original blade；
Blade after the diminution as the asymmetric S types airfoil fan reversal connection section；
Blade after the diminution is rotated 180 °, makes its trailing edge be connected to form spreading with the trailing edge of another original blade
Blade；
The spreading blade is integrally reduced, until the chord length such as spreading blade and original blade after reducing.
Preferably, the model NACA2412 of the original blade.
A kind of application process of asymmetric S types airfoil fan, comprising：By the reversion inverted ventilation of above-mentioned reversible axial flow blower,
Base station heat exchange of heat pipe where reversible axial flow blower is purged；And, by the rotating forward righteous style and practice of the reversible axial flow blower
Base station heat exchange of heat pipe is set to radiate.
The present invention has advantages below compared with prior art：
The present invention has reduction incidence loss, reduces contrary wind air-flow vortex phenomenon, lifts the air permeability of reversible axial flow blower
Can, greatly increase the advantage of reverse flow efficiency.
Brief description of the drawings
Fig. 1 is the overall structure diagram of the second blade in the prior art；
Fig. 2 is a kind of overall structure diagram of asymmetric S types airfoil fan of the present invention；
Fig. 3 is a kind of schematic diagram of one embodiment of asymmetric S types airfoil fan of the present invention.
Specific embodiment
Below in conjunction with accompanying drawing, by describing a preferably specific embodiment in detail, the present invention is further elaborated.
Title first to Fig. 1 each several parts is defined as follows：
Mean camber line：Done in aerofoil profile a series of suction surfaces (i.e. upper surface or the back side) molded line and pressure face (i.e. lower surface or
The outside of belly) molded line inscribed circle, the line of these incenters is referred to as the mean camber line of aerofoil profile.
Chord length：The line of mean camber line rear and front end point is referred to as wing chord, the length abbreviation chord length of wing chord.
Camber f：Maximum normal distance between mean camber line and wing chord is referred to as the maximum camber of aerofoil profile, abbreviation camber, it with
The ratio of chord length is referred to as relative maximum camber.
Leading-edge radius：Leading-edge radius is referred to as by the inscribed circle radius of the leading edge 1 of aerofoil profile, it is referred to as phase with the ratio of chord length
To leading-edge radius.
Maximum gauge b：Maximum inscribe diameter of a circle is referred to as the maximum gauge of aerofoil profile in aerofoil profile inscribed circle, it and chord length
Ratio is referred to as relative maximum thickness.
Maximum gauge position：Maximum gauge position is referred to as by the distance of leading edge point to maximum gauge along wing chord, itself and string
Ratio long is referred to as relative maximum thickness position.
Maximum camber position：It is called maximum camber position to the distance of maximum camber chordwise by leading edge point, it
It is referred to as relative maximum camber position with the ratio of chord length.
Trailing edge end face:The line segment that the end of suction surface molded line and the end line of pressure face molded line are constituted is trailing edge end face,
Its thickness turns into relative trailing edge end surface thickness with the ratio of chord length.
Ye Gao：Refer to the difference of the outside frame radius with the radius of the wheel hub of impeller.
With reference to shown in Fig. 1 and Fig. 2, a kind of asymmetric S types airfoil fan, comprising：First blade 1, the second blade 2 is described
Overall similar be contracted to second blade 2 0.6 times of first blade 1；After first blade 1 rotates 180 °, its trailing edge with
The trailing edge connection of second blade 2；First blade 1 as asymmetric S types airfoil fan reversal connection section, reversal connection section
There is guide effect to back draught.
The suction surface 11 of first blade is located at same side, first leaf with the pressure face 21 of second blade
The pressure face 12 of piece is located at same side with the suction surface 22 of second blade；The suction of first blade and the second blade
Face 11,22, and the pressure face 12,21 of the first blade and the second blade carries out chamfering smooth treatment, makes the suction surface wing
Molded line is smooth with the transition of pressure face aerofoil profile line.
Second blade 2 is using the asymmetric S types aerofoil profile of model NACA2412 as original airfoil fan.NACA tetra-
Bit digital aerofoil profile is that the Low Speed Airfoil series that U.S. NACA sets up earliest, i.e. each aerofoil profile name form are NACA XYZZ,
Wherein X refers to the relative maximum camber of airfoil fan, and Y refers to the maximum camber position of airfoil fan, and ZZ refers to airfoil fan
Relative maximum thickness.NACA2412 represents that the relative maximum camber of aerofoil profile is 2%, and the position of maximum camber is 0.4 times of chord length,
Relative maximum thickness is 12%.
The leading edge 20 of second blade 2 is to arch；The leading edge 10 of first blade 1 is of the invention to lower arch
The mean camber line of asymmetric S types airfoil fan is S-shaped.
A kind of method for designing of asymmetric S types airfoil fan, comprises the steps of：Choose two model NACA 2412
The blade of model is contracted to original 0.6 times as original blade, by one of them original blade is integrally similar；After diminution
Blade rotates 180 ° and is connected with the trailing edge of another original blade, and carries out chamfering smooth treatment to two blade junctions；By
After directly first blade is reversely connected with the trailing edge of second blade constitute new airfoil fan chord length with
The ratio between described first leaf chord length is more than 1, it is therefore desirable to again by this connect after the blade that is formed ensureing the machine of trailing edge junction
On the premise of tool intensity, overall similar diminution make its with the original blade etc. chord length.
A kind of application process of asymmetric S types airfoil fan, comprises the steps of：Above-mentioned asymmetric S types airfoil fan is made
It is the impeller blade of reversible axial flow blower, its reversion inverted ventilation is purged to base station heat exchange of heat pipe；It rotates forward righteous style and practice makes base station
Heat exchange of heat pipe radiates.
As shown in figure 3, in the present embodiment, by the use of a kind of asymmetric S types airfoil fan of the present invention as reversible axle stream wind
The impeller blade of machine, the reversible axle DC fan, as body, is realized rotating forward reversion operation using DC speed regulation blower fan；It is described
The impeller of DC speed regulation blower fan is included：The asymmetric S types airfoil fan 6 of wheel hub 4,8, in the asymmetric S types airfoil fan
The leading edge 20 of the second blade 2 is uniformly circumferentially positioned on the wheel hub 4, and blade root is referred to as with the contact position of the wheel hub 4, described non-right
Claim the leading edge 10 of the first blade 1 in S type airfoil fans to be connected with impeller outer rim 5, and with the impeller outer bezel contact at
Referred to as leaf top, the chord length of the asymmetric S types airfoil fan is 70.4mm.
Reversible axial flow blower in the present embodiment is as shown in table 1 using the parameter of asymmetric S types blade of the invention；
The relevant parameter of the blade that the impeller of the reversible axial flow blower of form 1 is used
The Design of Mechanical Structure parameter that the reversible axial flow blower is used is as shown in table 2：
The mechanical parameter of the reversible axial flow blower of form 2
| Parameter | Design requirement |
| Hub ratio | 0.4 |
| Aerofoil profile | The two-way asymmetric S wings |
| Mean chord b/mm | 70.4 |
| Wheel hub established angle β | 67° |
| Outer radius established angle β | 57° |
A kind of reversible axial flow blower of the present invention compared with the axial flow blower of prior art, when forward direction ventilation, gas in runner
Stream flowing is relatively more reasonable, little on the influence of positive air current flow efficiency；When inverted ventilation, the wind designed using novel airfoil
Machine has reversal connection section due to blade profile molded line, and guide effect is played to carrying out stream, therefore fluid is not separated with blade, in suction surface
11 along leaf direction high, and leaf top near exit is continued up to from blade root import, and vortex phenomenon reduces, and improves reversible axle stream
The performance of ventilating of blower fan, reverse flow efficiency is greatly increased.
Although present disclosure is discussed in detail by above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read the above, for of the invention
Various modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (10)
1. a kind of asymmetric S types airfoil fan, it is characterised in that include：First blade（1）, the second blade（2）, described first
Blade（1）Trailing edge and second blade（2）Trailing edge connection；First blade（1）It is second blade（2）It is overall
180 ° of back draught guide frame is rotated after diminution.
2. as claimed in claim 1 a kind of asymmetric S types airfoil fan, it is characterised in that first blade（1）It is described
Two blades（2）0.6 times.
3. as claimed in claim 1 a kind of asymmetric S types airfoil fan, it is characterised in that second blade（2）Exterior region
With first blade（1）Exterior region encircle towards opposite direction, make the mean camber line of asymmetric S types airfoil fan S-shaped.
4. as claimed in claim 1 a kind of asymmetric S types airfoil fan, it is characterised in that the asymmetric S types airfoil fan with
The chord lengths such as the airfoil fan of the model NACA2412.
5. as claimed in claim 1 a kind of asymmetric S types airfoil fan, it is characterised in that first blade（1）With the second leaf
Piece（2）Chord length be parallel to each other.
6. a kind of reversible axial flow blower, it is characterised in that include：Impeller；The impeller is further included：
Asymmetric S types airfoil fan, wheel hub described in any one in claim 1 ~ 5（4）And impeller outer rim（5）；
Multiple asymmetric S types airfoil fans are circumferentially positioned at the wheel hub（4）With impeller outer rim（5）Between, described
Two blades（2）Leading edge and the wheel hub（4）Connection；First blade（1）Leading edge and the impeller outer rim（5）Even
Connect.
7. reversible axial flow blower as claimed in claim 6, it is characterised in that the chord length of the asymmetric S types airfoil fan is
70.4mm。
8. in a kind of claim 1 ~ 5 the asymmetric S types airfoil fan of any one method for designing, it is characterised in that comprising with
Lower step：Two original blades are chosen, by the integrally similar diminution of one of them original blade；
Blade after diminution as the asymmetric S types airfoil fan reversal connection section；
Blade after the diminution is rotated 180 °, makes its trailing edge be connected to form spreading leaf with the trailing edge of another original blade
Piece；
The spreading blade is integrally reduced, until the chord length such as spreading blade and original blade after reducing.
9. as claimed in claim 8 asymmetric S types airfoil fan method for designing, it is characterised in that the type of the original blade
Number be NACA2412.
10. a kind of application process of asymmetric S types airfoil fan, it is characterised in that include：By can described in claim 6 or 7
The reversion inverted ventilation of inverse axial flow blower, purges to the base station heat exchange of heat pipe where reversible axial flow blower；And, can by this
The rotating forward righteous style and practice of inverse axial flow blower makes base station heat exchange of heat pipe radiate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611165663.4A CN106762827A (en) | 2016-12-16 | 2016-12-16 | A kind of asymmetric S types airfoil fan and its design and application process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611165663.4A CN106762827A (en) | 2016-12-16 | 2016-12-16 | A kind of asymmetric S types airfoil fan and its design and application process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106762827A true CN106762827A (en) | 2017-05-31 |
Family
ID=58891784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611165663.4A Pending CN106762827A (en) | 2016-12-16 | 2016-12-16 | A kind of asymmetric S types airfoil fan and its design and application process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106762827A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111608853A (en) * | 2020-07-01 | 2020-09-01 | 上海电气风电集团股份有限公司 | Fan blade |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03168543A (en) * | 1989-10-27 | 1991-07-22 | Carrier Corp | Heat exchange unit for air condition system |
| CN2235039Y (en) * | 1995-12-27 | 1996-09-11 | 西安交通大学 | Two-head reversing asymmetrical fan blade |
| EP0881395A3 (en) * | 1997-05-30 | 1999-09-01 | Carrier Corporation | Fan and heat exchanger assembly |
| CN1473244A (en) * | 2000-11-08 | 2004-02-04 | 罗伯特博施公司 | High-efficiency, inflow-adapted, axial-flow fan |
| CN102720701A (en) * | 2012-07-10 | 2012-10-10 | 大连理工大学 | Asymmetric reversible S-shaped vane profile design |
-
2016
- 2016-12-16 CN CN201611165663.4A patent/CN106762827A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03168543A (en) * | 1989-10-27 | 1991-07-22 | Carrier Corp | Heat exchange unit for air condition system |
| CN2235039Y (en) * | 1995-12-27 | 1996-09-11 | 西安交通大学 | Two-head reversing asymmetrical fan blade |
| EP0881395A3 (en) * | 1997-05-30 | 1999-09-01 | Carrier Corporation | Fan and heat exchanger assembly |
| CN1473244A (en) * | 2000-11-08 | 2004-02-04 | 罗伯特博施公司 | High-efficiency, inflow-adapted, axial-flow fan |
| CN102720701A (en) * | 2012-07-10 | 2012-10-10 | 大连理工大学 | Asymmetric reversible S-shaped vane profile design |
Non-Patent Citations (1)
| Title |
|---|
| 谢蓉、高博: "非对称可逆轴流风机S型翼型的设计与性能研究", 《风机技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111608853A (en) * | 2020-07-01 | 2020-09-01 | 上海电气风电集团股份有限公司 | Fan blade |
| CN111608853B (en) * | 2020-07-01 | 2022-01-21 | 上海电气风电集团股份有限公司 | Fan blade |
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Application publication date: 20170531 |