CN106704091A - Blade used for wind power water lifting machine and provided with gurney flaps and wind wheel - Google Patents
Blade used for wind power water lifting machine and provided with gurney flaps and wind wheel Download PDFInfo
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- CN106704091A CN106704091A CN201611165324.6A CN201611165324A CN106704091A CN 106704091 A CN106704091 A CN 106704091A CN 201611165324 A CN201611165324 A CN 201611165324A CN 106704091 A CN106704091 A CN 106704091A
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- blade
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- blade body
- wheel rim
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 238000009826 distribution Methods 0.000 claims description 2
- 238000005452 bending Methods 0.000 abstract 1
- 230000007547 defect Effects 0.000 abstract 1
- 230000007704 transition Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000035800 maturation Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000010200 validation analysis Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/065—Rotors characterised by their construction elements
- F03D1/0675—Rotors characterised by their construction elements of the blades
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/0608—Rotors characterised by their aerodynamic shape
- F03D1/0633—Rotors characterised by their aerodynamic shape of the blades
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/065—Rotors characterised by their construction elements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Wind Motors (AREA)
Abstract
The invention relates to a blade used for a wind power water lifting machine and provided with gurney flaps and a wind wheel. The blade comprises blade bodies (2), and is characterized in that the gurney flaps (1) are arranged at the tail edge positions of the blade bodies (2); the arc wing sections are adopted in the sections of the blade bodies (2), the bending degree is 10% of the chord length, and the tip speed ratio is 1.2; the blade bodies (2) are in a streamline torsional angle shape, the part from the blade tip to the blade root of each blade body (2) is divided into 10 sections to be provided with installing angles, and the sections are in smooth transition; and specific parameters of the chord length of each section of the blade bodies (2) and the installing angles are shown in the graph 1. According to the wind wheel of the blade with the gurney flaps, the blade wind energy utilization rate is increased, the output power of the wind power water lifting machine wind power is improved, and the defects existing in existing traditional blades are overcome.
Description
Technical field
It is more particularly to a kind of for blade of the wind-driven water pump with gurney flap the invention belongs to technical field of new energies
And wind wheel.
Background technology
As environment and energy problem become increasingly conspicuous, effect of the new energy in current economic society is more and more obvious.Wind
Can be a kind of inexhaustible regenerative resource, with technology maturation, advantage of lower cost, have fewer environmental impacts
Etc. advantage.Wind Power Utilization mainly has two ways：One kind is to convert wind energy into mechanical energy using wind power generation plant to convert again
Be electric energy, i.e. wind-power electricity generation, it is relatively early that this Wind Power Utilization mode is studied, formd maturation wind-powered electricity generation is theoretical and industry
Pattern, but this wind-power electricity generation needs complicated control system, in addition it is also necessary to expensive mating electrical equipment, limit its hair
Exhibition；Wind energy is converted into mechanical energy by another kind using mechanical device, such as utilizes wind-driven water pump.Water pumping of the wind-force is used as having
Effect utilizes wind energy, solves the problems, such as the important form of agricultural irrigation, is a kind of simple, reliability, practicality, efficient application technology.Its
Mechanical structure is uncomplicated, with low cost, manipulate and easy to maintenance, and the requirement of number is not very during to annual mean wind speed and effective wind speed
It is high.But water pumping of the wind-force also there are problems that many insoluble, such as increase blade wind energy utilization, raising power output and ask
Topic, need further research.
In order to reduce the threshold wind velocity of wind-driven water pump, usually increase the number of blade, causing the number of blade more rotor solidity compared with
Greatly, so as to influence its wind energy utilization.In order to lift the wind energy utilization of wind-driven water pump blade, solved there has been proposed a lot
Method：Chinese patent application 201510434944.4 discloses a kind of " pneumatic equipment bladess that blade tip trailing edge is serrated ", it
Slot blade tip trailing edge part so that blade tip trailing edge is serrated, and to reduce noise, but can not improve blade output performance, and work
Skill is complicated；Chinese patent application 201520412592.8 discloses a kind of " blade of vertical axis wind turbine with flow guide bar ", it
Open up to a flow guide bar is respectively installed at 20%, 40%, 60%, 80% to lift wind factor along blade, but this can only with hang down
D-axis wind energy conversion system, using narrow and relatively costly；Chinese patent application 200410017010.4 discloses a kind of small with blade tip
The horizontal-shaft wind turbine of the wing, improves the efficiency of wind energy conversion system by installing winglet at Axis Wind Turbine With A Tip Vane, but document winglet by
In aerofoil profile is used, so structure is more compared with complicated, operation, cost of manufacture is high, installation difficulty；Chinese patent application
200820055227.6 disclose a kind of horizontal-shaft wind turbine with tip vane, and plate tooth is simply installed at blade tip
Shape winglet improves the combination property of wind energy conversion system, and the small wing-like of the method optimization can adjust stall, but can not effectively improve
The power output of blower fan.
The content of the invention
The purpose of the present invention is to overcome the shortcomings of to provide a kind of band for wind-driven water pump existing for prior art
The blade and wind wheel of gurney flap, the present invention can effectively improve the wind energy utilization of blade, increase wind-driven water pump wind wheel
Power output, overcomes the shortcomings of existing traditional blades.
According to a kind of blade with gurney flap for wind-driven water pump proposed by the present invention, including blade body, its
It is characterised by, gurney flap is provided with the trailing edge of the blade body；The section of the blade body uses circular arc aerofoil profile, curved
It is 10% chord length to spend, and tip speed ratio is 1.2；The blade body is streamlined torsional angle shape, from the blade tip of blade body to leaf
10 sections of root point set established angle, are smoothly transitted between each section；The chord length in each section of the blade body and installation
The parameter at angle is as shown in table 1.
Table 1
| Section sequence number | Chord length (mm) | Established angle (°) |
| 1001 | 195.00 | 35.00 |
| 1002 | 225.33 | 33.89 |
| 1003 | 255.67 | 32.78 |
| 1004 | 286.00 | 31.67 |
| 1005 | 316.33 | 30.56 |
| 1006 | 346.67 | 29.44 |
| 1007 | 377.00 | 28.33 |
| 1008 | 407.33 | 27.22 |
| 1009 | 437.67 | 26.11 |
| 1010 | 468.00 | 25.00 |
Realization principle of the invention is：On the one hand, the present invention is increased by setting gurney flap at the trailing edge of blade body
Add the curvature of aerofoil profile trailing edge, so as to increase effective camber of aerofoil profile, increased typical circular rector, and then increase the liter of aerofoil profile
Power；On the other hand, the present invention at gurney flap rear by after setting gurney flap at the trailing edge of blade body, generating
The Karman vortex street that one alternating comes off, the vortex street that the alternating comes off has inducing action to aerofoil profile upper surface air-flow, flows through suction
The air in face by not only, without separating, speed increases on the contrary after gurney flap, promote the air-flow of aerofoil profile upper surface trailing edge to
Lower absorption, increased the energy of aerofoil profile upper surface flowing, make it be more easy to resist adverse pressure gradient, reduce aerofoil profile upper surface Disengagement zone
Area, makes stall, increases the stalling angle of aerofoil profile, so as to improve lift force coefficient, increased the lift-drag ratio of aerofoil profile, increases
The big power output of wind wheel.
Its remarkable advantage is the present invention compared with prior art：
One is that the blade with gurney flap proposed by the present invention and wind wheel are not reducing blade and do not influenceing wind-driven water pump
On the premise of starting wind velocity, the wind energy utilization of blade is improve, wind-driven water pump wind wheel power output is increased, in wind speed 4-
In the range of 10m/s, the power output of wind wheel averagely increases 2.71% than conventional wind water elevator wind wheel, and maximum increases
3.17%.
Two be the blade with gurney flap of the invention and wind wheel structure design it is entirely different with prior art, see below
Table 3；Blade with gurney flap proposed by the present invention and wind wheel it is simple and reliable for structure, technique is easily manufactured, is easy to integration
Design, is suitable for large-scale production.
Table 3
Brief description of the drawings
Fig. 1 is that a kind of 3 D stereo of blade with gurney flap for wind-driven water pump proposed by the present invention is illustrated
Figure.
Fig. 2 is the schematic front view of the blade with gurney flap proposed by the present invention.
Fig. 3 is the wind wheel 3 D stereo schematic diagram of the blade with gurney flap proposed by the present invention.
Fig. 4 be the blade tip angle of attack proposed by the present invention be 9 ° when, the arrives stream wind speed and power output of wind wheel proposed by the present invention
The relation schematic diagram of growth rate；Wherein, the blade tip angle of attack refers to the angle between wing chord and speed of incoming flow.
Fig. 5 is a kind of wind wheel of blade with gurney flap for wind-driven water pump proposed by the present invention in rated wind speed
The relation schematic diagram of the blade tip angle of attack and power output growth rate under the conditions of 8m/s.
Numbering explanation in Fig. 1 and Fig. 3：Gurney flap (1), blade body (2), outer ring wheel rim (3), inner ring wheel rim (4),
Wheel rim fix bar (5), wheel hub (6).
Specific embodiment
Specific embodiment of the invention is described in further detail with reference to the accompanying drawings and examples.
With reference to Fig. 1 and Fig. 2, the present invention proposes a kind of blade with gurney flap for wind-driven water pump, including blade
Body (2), gurney flap (1) is provided with the trailing edge of the blade body (2)；The section of the blade body (2) uses circular arc
Shape aerofoil profile, camber is 10% chord length, and tip speed ratio is 1.2；The tip speed ratio refers to the linear velocity and speed of incoming flow of blade tip
Ratio；The blade body (2) is streamlined torsional angle shape, and from the blade tip of blade body (2) to blade root, point 10 sections are set
Established angle, smoothly transits between each section；The chord length in each section of the blade body (2) and the parameter such as table 1 of established angle
It is shown.
Table 1
| Section sequence number | Chord length (mm) | Established angle (°) |
| 1001 | 195.00 | 35.00 |
| 1002 | 225.33 | 33.89 |
| 1003 | 255.67 | 32.78 |
| 1004 | 286.00 | 31.67 |
| 1005 | 316.33 | 30.56 |
| 1006 | 346.67 | 29.44 |
| 1007 | 377.00 | 28.33 |
| 1008 | 407.33 | 27.22 |
| 1009 | 437.67 | 26.11 |
| 1010 | 468.00 | 25.00 |
A kind of further preferred scheme of blade with gurney flap for wind-driven water pump proposed by the present invention is：
, along blade body (2) in opening up to distribution, the chord length with blade body (2) each section is vertical, lattice Buddhist nun's flap for the gurney flap (1)
The height of the wing (1) is 2% section chord length, and the thickness of gurney flap (1) is 2mm；Lattice Buddhist nun's flap at each section of blade body (2)
The height parameter of the wing (1) is as shown in table 2.
Table 2
| Section sequence number | Flap height (mm) |
| 1001 | 3.90 |
| 1002 | 4.51 |
| 1003 | 5.11 |
| 1004 | 5.72 |
| 1005 | 6.33 |
| 1006 | 6.93 |
| 1007 | 7.54 |
| 1008 | 8.15 |
| 1009 | 8.75 |
| 1010 | 9.36 |
Embodiment 1.Below with a kind of vane manufacturing wind with gurney flap for wind-driven water pump proposed by the present invention
As a example by wheel, concrete application scheme of the invention is further disclosed.
With reference to Fig. 3, a kind of wind wheel of blade with gurney flap for wind-driven water pump is included in and lattice is provided with trailing edge
The blade body (2) of Buddhist nun's wing flap (1), outer ring wheel rim (3), inner ring wheel rim (4), wheel rim fix bar (5) and wheel hub (6), it is described
The quantity that the blade body (2) of gurney flap (1) is provided with trailing edge is 12, is respectively arranged on inner ring wheel rim (4) and outer ring
Between wheel rim (3), phase difference be 30 degree, wheel hub (6) is by wheel rim fix bar (5) and inner ring wheel rim (4) and outer ring wheel rim (3)
Connection.
Concrete application effect of the invention is：In 4-12m/s wind speed ranges, by the wind wheel and existing skill of present invention offer
The wind wheel do not reequiped of art is compared, and tests its power output.Method of testing is constant using loading, and changes the experiment of arrives stream wind speed
Method measures the change of wind wheel power output, and its result is as shown in Figure 4 and Figure 5.Wherein：As shown in Figure 4, in 4-12m/s wind speed models
In enclosing, when the blade tip angle of attack is 9 ° compared with the wind wheel do not reequiped, the power output of the wind wheel that the present invention is provided has in various degree
Increase, highest growth rate be 2.81%；As shown in Figure 5, in rated wind speed 8m/s, the present invention is carried under each blade tip angle of attack
The power output of the wind wheel of confession gets a promotion, and highest growth rate is 3.17%.
From embodiment 1 as can be seen that a kind of blade with gurney flap for wind-driven water pump proposed by the present invention and
Wind wheel, in the case where starting wind velocity is not influenceed, is effectively improved the wind energy utilization of blade, increased wind-driven water pump wind
The power output of wheel.
All explanations not related to belong to techniques known in specific embodiment of the invention, refer to known skill
Art is carried out.
The present invention achieves satisfied trial effect through validation trial.
Above specific embodiment and embodiment are to a kind of band lattice Buddhist nun's flap for wind-driven water pump proposed by the present invention
The specific support of the blade and wind wheel technological thought of the wing, it is impossible to which protection scope of the present invention is limited with this, it is every according to the present invention
The technological thought of proposition, any equivalent variations done on the basis of the technical program or equivalent change, still fall within this hair
The scope of bright technical scheme protection.
Claims (3)
1. a kind of blade with gurney flap for wind-driven water pump, including blade body (2), it is characterised in that the leaf
Gurney flap (1) is provided with the trailing edge of piece body (2)；The section of the blade body (2) is using circular arc aerofoil profile, camber
10% chord length, tip speed ratio is 1.2；The blade body (2) is streamlined torsional angle shape, from the blade tip of blade body (2) extremely
10 sections of blade root point set established angle, are smoothly transitted between each section；The chord length in each section of the blade body (2) and
The parameter of established angle is as shown in table 1.
Table 1
2. a kind of blade with gurney flap for wind-driven water pump according to claim 1, it is characterised in that described
, along blade body (2) in opening up to distribution, the chord length with blade body (2) each section is vertical, gurney flap for gurney flap (1)
(1) height is 2% section chord length, and the thickness of gurney flap (1) is 2mm；Lattice Buddhist nun's flap at each section of blade body (2)
The height parameter of the wing (1) is as shown in table 2.
Table 2
3. a kind of wind wheel with gurney flap blade for wind-driven water pump, it is characterised in that be included in and lattice are provided with trailing edge
The blade body (2) of Buddhist nun's wing flap (1), outer ring wheel rim (3), inner ring wheel rim (4), wheel rim fix bar (5) and wheel hub (6), it is described
The quantity that the blade body (2) of gurney flap (1) is provided with trailing edge is 12, is respectively arranged on inner ring wheel rim (4) and outer ring
Between wheel rim (3), phase difference be 30 degree, wheel hub (6) is by wheel rim fix bar (5) and inner ring wheel rim (4) and outer ring wheel rim (3)
Connection.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610961370 | 2016-10-28 | ||
| CN2016109613700 | 2016-10-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106704091A true CN106704091A (en) | 2017-05-24 |
Family
ID=58938948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611165324.6A Pending CN106704091A (en) | 2016-10-28 | 2016-12-16 | Blade used for wind power water lifting machine and provided with gurney flaps and wind wheel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106704091A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110645144A (en) * | 2019-09-26 | 2020-01-03 | 上海理工大学 | Vertical axis wind turbine with front edge active telescopic sliding blade |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102094769A (en) * | 2011-02-24 | 2011-06-15 | 西北工业大学 | Wind machine blade airfoil profile capable of controlling flow stalling through standing vortex |
| KR20110131329A (en) * | 2010-05-29 | 2011-12-07 | 주식회사 이젠 | Using the blade, and it increased wind power generation wind turbines |
| CN203081660U (en) * | 2012-12-14 | 2013-07-24 | 田育均 | Wind impeller |
| CN203948224U (en) * | 2014-07-11 | 2014-11-19 | 苏州正典精密五金有限公司 | The wheeled axial flow type wind generator set of a kind of multiple fan blade |
| US20150322919A1 (en) * | 2014-05-06 | 2015-11-12 | Corporación SkyTwister S. A. | Electricity Generating Wind Turbine |
-
2016
- 2016-12-16 CN CN201611165324.6A patent/CN106704091A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110131329A (en) * | 2010-05-29 | 2011-12-07 | 주식회사 이젠 | Using the blade, and it increased wind power generation wind turbines |
| CN102094769A (en) * | 2011-02-24 | 2011-06-15 | 西北工业大学 | Wind machine blade airfoil profile capable of controlling flow stalling through standing vortex |
| CN203081660U (en) * | 2012-12-14 | 2013-07-24 | 田育均 | Wind impeller |
| US20150322919A1 (en) * | 2014-05-06 | 2015-11-12 | Corporación SkyTwister S. A. | Electricity Generating Wind Turbine |
| CN203948224U (en) * | 2014-07-11 | 2014-11-19 | 苏州正典精密五金有限公司 | The wheeled axial flow type wind generator set of a kind of multiple fan blade |
Non-Patent Citations (1)
| Title |
|---|
| 高翀恒，郑源，周鑫: "小型风力提水机的低实度风轮设计及其数值模拟", 《水电能源科学》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110645144A (en) * | 2019-09-26 | 2020-01-03 | 上海理工大学 | Vertical axis wind turbine with front edge active telescopic sliding blade |
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Application publication date: 20170524 |