CN102996367A - Movable winglet device for wind turbine blade - Google Patents
Movable winglet device for wind turbine blade Download PDFInfo
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- CN102996367A CN102996367A CN2012104958082A CN201210495808A CN102996367A CN 102996367 A CN102996367 A CN 102996367A CN 2012104958082 A CN2012104958082 A CN 2012104958082A CN 201210495808 A CN201210495808 A CN 201210495808A CN 102996367 A CN102996367 A CN 102996367A
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- winglet
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Abstract
The invention relates to a movable blade tip winglet for a wind turbine blade and belongs to the field of wind power generation. The top end of the wind turbine blade is connected with the movable winglet; a steering engine is connected with a driving rod which is connected with a booster; and the booster drives the movable winglet to rotate. The invention aims at providing the movable winglet device for the wind turbine blade, which can be used for controlling the flowing of a blade tip part, reducing the aerodynamic load at a high wind speed under the condition of maintaining the aerodynamic efficiency of the blade at a low wind speed, and stably and accurately controlling the aerodynamic load nearby a rated wind speed and the generated power so that the aerodynamic load applied to the blade and the whole generated power can be in smooth transition.
Description
Technical field
The present invention relates to the movable tip vane of a kind of pneumatic equipment blades made, belong to wind power generation field.
Background technique
The height of pneumatic equipment blades made pneumatic efficiency has determined the quality of a wind energy conversion system on market, so how to increase the key that the blade pneumatic efficiency is the wind energy conversion system design.In addition on the one hand, along with wind speed increases, the suffered aerodynamic loading of blade also increases thereupon, thereby reduces the working life of wind energy conversion system structural system, and therefore, it also is emphasis that high wind speed carries out load shedding.The large scale wind power machine blade of existing market main flow pneumatic efficiency under little wind speed is low, catches little energy, can not take full advantage of wind energy resources; And under large wind speed, the suffered aerodynamic loading of pneumatic equipment blades made is then excessive, has improved the structure requirement of strength, has increased the cost of blade; When wind speed is near rated wind speed, the main flow wind energy conversion system is kept generating efficiency and control aerodynamic loading by vane propeller-changing, but whole vane propeller-changing elongation is difficult to stable accurately control generated output and aerodynamic loading, thereby needs to increase the device of more accurate control.
It is to improve the blade aeroperformance by flow control means that many patents are arranged, as adds wing flap, front marginal zone rotating cylindrical body, jet vectoring etc.For present existing pneumatic equipment blades made, the main pneumatic distributed load of blade with catch power and all concentrate on the blade tip near zone, therefore the blade tip near zone is the key position that improves the blade pneumatic efficiency, reduces large wind speed lower blade aerodynamic loading, therefore blade tip increase winglet to the aerodynamic loading of controlling whole blade with catch power and will have significant effect.For three kinds of wind conditions that run into for above-mentioned wind energy conversion system, with winglet designs for can control movable tackling respectively.At low wind speed, winglet and wind wheel plane can not reduce with the pneumatic efficiency that guarantees blade at same plane; Near rated wind speed, by the control to the winglet rotation angle, reach the purpose of precise and stable control blade generated output and aerodynamic loading, make it smooth transition; Under high wind speed, winglet turns to 90 °, is guaranteeing to reduce the aerodynamic loading of blade under the constant prerequisite of generated output.
Summary of the invention
The present invention is directed to above-mentioned deficiency provides a kind of pneumatic equipment blades made movable little swing device.
The present invention adopts following technological scheme:
The movable little swing device of a kind of pneumatic equipment blades made of the present invention comprises pneumatic equipment blades made, it is characterized in that: comprise movable winglet, steering wheel, drive link, booster; The top of described pneumatic equipment blades made connects movable winglet; Steering wheel is connected with drive link, and drive link connects booster, and booster drives movable winglet and rotates.
The movable little swing device of pneumatic equipment blades made of the present invention, the sectional shape on the sectional shape of described movable winglet connecting end and pneumatic equipment blades made top is complementary.
The movable little swing device of pneumatic equipment blades made of the present invention, the joint of described movable winglet and pneumatic equipment blades made adopt has plastoelastic skin material parcel.
The movable little swing device of pneumatic equipment blades made of the present invention, the rotation angle of described movable winglet are 0 °-90 °.
The movable little swing device of pneumatic equipment blades made of the present invention, the radial length of described movable winglet is the 2%-3% of pneumatic equipment blades made length.
Beneficial effect
The purpose of this invention is to provide the movable little swing device of a kind of pneumatic equipment blades made, the mobile of blade tip position controlled, under the prerequisite that keeps the blade pneumatic efficiency under the low wind speed, reduce simultaneously the aerodynamic loading under the high wind speed, and aerodynamic loading and generated output near the stable accurately control rated wind speed, the suffered aerodynamic loading of blade and whole generated output can be seamlessly transitted.
Application area of the present invention is wider, can be based on the commercial blade of present existing comparative maturity, only need to carry out certain repacking to vaned blade tip position, and can not change vaned whole aerodynamic arrangement, can significantly improve the performance under the vaned full blast speed.
Description of drawings
Fig. 1 is primary blades of the present invention and movable winglet plan view;
Fig. 2 is primary blades of the present invention and movable winglet plan view;
Fig. 3 is the dimensional airfoil figure of the movable tip vane of the present invention;
Fig. 4 be the movable tip vane of the present invention along exhibition to chord length distribution figure;
Fig. 5 is the movable tip vane of the present invention actuator schematic representation;
0 ° of Fig. 6 winglet rotation angle is during with 30 °, the comparison schematic representation of blade tip zone thrust;
0 ° of Fig. 7 winglet rotation angle is during with 30 °, the comparison schematic representation of blade tip zone tangential force;
1 is tip vane among the figure, the 2nd, and primary blades, the 3rd, top airfoil, the 4th, lower aerofoil, the 5th, covering, the 6th, steering wheel, the 7th, drive link, the 8th, booster, the 9th, winglet.
Embodiment
The present invention is described in more detail below in conjunction with accompanying drawing:
As shown in the figure: the movable little swing device of a kind of pneumatic equipment blades made, on a complete common blade basis, at blade tip intercepting suitable length a movable winglet is installed.First cross section aerofoil profile of movable winglet should be identical with the last aerofoil profile of primary blades, can carry out ACTIVE CONTROL winglet angle changes, movable tip vane also comprises its actuator and is connected primary blades place appearance covering except little wing part, actuator realizes the winglet rotation by steering wheel, and 6 for producing the steering wheel of corresponding rotation among the figure behind the reception active control signal; 7 carry out change in displacement for drive link among the figure; Directly realize again the rotation of winglet by 8 boosters among the figure.The primary blades place appearance that connects movable winglet adopts has plastoelastic skin material parcel, can change along with the variation of winglet angle.Its radial length is got 2% to 3% of primary blades length.The aerofoil profile of movable winglet is the aerofoil profile in the last cross section of primary blades, and torsional angle is constant, obtains the most rational chord length distribution by the power factor of optimizing winglet.Can be from 0 ° to 90 ° range, and angle changes towards suction surface.The suction surface covering is to have telescopic elastoplastic material, stretches along with the change of angle.
The control strategy method of winglet is implemented as follows:
Wind energy conversion system is when operating in low wind speed zone, and movable winglet does not change angle, becomes 0 ° with primary blades; When running on transition wind speed when zone, at this moment by ACTIVE CONTROL to operator signals, implement corresponding change by the angle that drive link and booster present winglet; When wind energy conversion system operation high wind speed, movable winglet turns to 90 ° of maximum angles.
Under low wind speed, namely below the rated wind speed, movable winglet is 0 degree angle with wind wheel namely along the primary blades exhibition to the direction elongation.Guaranteed primary blades under this state in the situation of little wind speed, pneumatic efficiency can not decrease.
Near rated wind speed, because it is accurate not to aerodynamic loading and the generated output control of whole blade to become oar control, and by regulating the angle of movable winglet, the aerodynamic loading of the whole blade of accurate control that can be very stable, the change oar control of blade is so that the generated output curve has a mild transition.
Under high wind speed, namely more than the rated wind speed, movable winglet turns to 90 °.In this state, after at first movable winglet rotates, the wind-exposuring area of wind mill wind wheel has just reduced relatively, the suffered aerodynamic loading of blade integral can decrease naturally, and simultaneously owing to the inhibition of movable winglet to blade tip Three dimensional Flow effect, increase the pneumatic efficiency of blade, can keep the substantially constant of blade generated output.Generally speaking, effect by movable winglet, guaranteeing under the substantially constant prerequisite of blade integral generated output, reduced the suffered aerodynamic loading of blade, if keeping on the constant basis of original blade structure intensity like this, the generating wind speed range that blade can bear can increase, and is perhaps keeping can reducing the structural strength requirement of blade on the constant basis of generating wind speed range.
In order to verify the effect of movable winglet, use the computational fluid mechanics method that movable winglet has been carried out numerical simulation.Chosen this typical wind speed of 10m/s, the rotation angle of winglet has been chosen 0 ° and 30 °.When Fig. 6 and Fig. 7 are respectively 0 ° of winglet rotation angle, 30 ° of states, the thrust in blade tip zone and tangential force.Wherein thrust is the power that blade is subject to flow path direction, is main blade aerodynamic loading, and suppressing blade tip by the winglet that can find out 30 ° of under same wind speed rotation angles among Fig. 6, to stream the effect of effect remarkable, when thrust is significantly less than 0 ° of winglet.And in Fig. 7, because during 30 ° of rotation angles, the blade tip position is lower slightly during than 0 °, therefore at the position of the blade tip of blade, the tangential force that rotation angle is 30 ° is less than 0 °, but again toward blade interior a bit, owing to blade tip is streamed the inhibition of effect, tangential force under 30 ° of states of rotation angle is just greater than 0 °, when generally speaking 0 ° of rotation angle was with 30 °, tangential force can remain unchanged substantially, and tangential force promotes the direct driving force of blade rotation just, directly affect the generated output of blade, the generated output that tangential force constant illustrated blade has kept constant 0 ° of winglet rotation angle during with 30 ° substantially.
Be the shape of the one embodiment of the invention whole blade of son and movable winglet, actuator and the whole Blade Properties analysis chart of movable winglet.Based on original length of blade be 41 meters, rated power is 1500KW.
See figures.1.and.2, be primary blades and winglet working state figure, the angle of the pressure center line in each cross section of winglet and the pressure center line in each cross section of primary blades is defined as the rotation angle α of winglet.Add winglet at Axis Wind Turbine With A Tip Vane, when wind wheel rotates, just be equivalent to add a diffuser at blade tip, so add the amplification that winglet plays output power according to the theoretical Axis Wind Turbine With A Tip Vane of diffuser.For wind energy conversion system is carried out numerical simulation calculation with the model of tip vane, need carry out Geometric Modeling according to the geometrical shape of blade and winglet to blade.The state of movable winglet under different wind speed is different, under low wind speed, launches fully, becomes 0 ° with leaf angle, increases wind catching area.In the larger situation of wind speed, angle increases gradually between winglet and blade plane, until 90 °, play the reduction aerodynamic loading, and the accurately effect of power ratio control output.
With reference to Fig. 3 and Fig. 4, be air foil shape and the chord length distribution of movable winglet.The specific design of movable winglet changes the model that chord length draws a series of winglets, and chord length changes between ± 5%.Utilize the BEM theory to calculate the geometric shape of these a series of winglets, obtain power factor
C P Maximum winglet is optimum, determines thus the geometrical shape of movable winglet.
With reference to Fig. 5, be movable tip vane actuator schematic representation.Movable winglet of the present invention can be realized the winglet rotation by steering wheel, and 6 is the steering wheel that produces corresponding rotation behind the reception control signal among the figure; 7 is drive link among the figure; Therefore deflecting torque may be larger in running owing to winglet, and steering wheel can not directly drive, and needs 8 boosters among the figure directly to realize the rotation of winglet; 9 is the schematic representation of movable tip vane among the figure.
With reference to Fig. 6, be the comparison of 0 ° of suffered thrust of blade during with 30 ° for the winglet rotation angle.Thrust is the power that blade is subject to flow path direction, it is main blade aerodynamic loading, the winglet that can find out 30 ° of under same wind speed rotation angles suppresses blade tip, and to stream the effect of effect remarkable, when thrust is significantly less than 0 ° of state, illustrates that winglet has reduced the aerodynamic loading of blade.
With reference to Fig. 7, be the comparison of 0 ° of suffered tangential force of blade during with 30 ° for the winglet rotation angle.Tangential force is the direct driving force that promotes blade rotation, directly affects the generated output of blade.Because during 30 ° of rotation angles, the blade tip position is lower slightly during than 0 °, therefore at the position of the blade tip of blade, tangential force under 30 ° of states of rotation angle is less than 0 °, but again toward blade interior a bit, owing to blade tip is streamed the inhibition of effect, tangential force under 30 ° of states of rotation angle is just greater than 0 °, when generally speaking 0 ° of angle was with 30 °, tangential force can remain unchanged substantially, and the generated output of blade is also substantially constant.
Application area of the present invention is wider, can be based on the commercial blade of present existing comparative maturity, only need to carry out certain repacking to vaned blade tip position, and can not change vaned whole aerodynamic arrangement, can significantly improve the performance under the vaned full blast speed.
Claims (5)
1. the movable little swing device of pneumatic equipment blades made comprises pneumatic equipment blades made, it is characterized in that: comprise movable winglet, steering wheel, drive link, booster; The top of described pneumatic equipment blades made connects movable winglet; Steering wheel is connected with drive link, and drive link connects booster, and booster drives movable winglet and rotates.
2. the movable little swing device of pneumatic equipment blades made according to claim 1, it is characterized in that: the sectional shape on the sectional shape of described movable winglet connecting end and pneumatic equipment blades made top is complementary.
3. the movable little swing device of pneumatic equipment blades made according to claim 1 is characterized in that: adopt the joint of described movable winglet and pneumatic equipment blades made has plastoelastic skin material parcel.
4. the movable little swing device of pneumatic equipment blades made according to claim 1, it is characterized in that: the rotation angle of described movable winglet is 0 °-90 °.
5. the movable little swing device of pneumatic equipment blades made according to claim 1, it is characterized in that: the radial length of described movable winglet is the 2%-3% of pneumatic equipment blades made length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104958082A CN102996367A (en) | 2012-11-29 | 2012-11-29 | Movable winglet device for wind turbine blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104958082A CN102996367A (en) | 2012-11-29 | 2012-11-29 | Movable winglet device for wind turbine blade |
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| Publication Number | Publication Date |
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| CN102996367A true CN102996367A (en) | 2013-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012104958082A Pending CN102996367A (en) | 2012-11-29 | 2012-11-29 | Movable winglet device for wind turbine blade |
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| CN (1) | CN102996367A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104018996A (en) * | 2014-05-30 | 2014-09-03 | 西安交通大学 | Wind turbine blade with automatic windward area adjustment function |
| CN106884759A (en) * | 2015-12-16 | 2017-06-23 | 北京博比风电科技有限公司 | A kind of blade synergy design for low wind speed area wind power generating set |
| CN108331712A (en) * | 2018-02-27 | 2018-07-27 | 青岛华创风能有限公司 | It is a kind of can noise reducing wind electricity blade |
| CN109271657A (en) * | 2018-07-25 | 2019-01-25 | 许继集团有限公司 | A kind of wind power generating set catches wind coefficient, over the evaluation method of hair hourage |
| CN110043423A (en) * | 2019-04-04 | 2019-07-23 | 上海理工大学 | A kind of vertical shaft wind motor of the movable trailing edge blade of band |
| CN110242494A (en) * | 2019-07-25 | 2019-09-17 | 无锡风电设计研究院有限公司 | A kind of movable sawtooth trailing edge structures of wind energy conversion system with wing flap function |
Citations (6)
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|---|---|---|---|---|
| CN1563707A (en) * | 2004-03-18 | 2005-01-12 | 上海交通大学 | Horizontal shaft wind mill with small sharp wing |
| CN102220935A (en) * | 2010-04-15 | 2011-10-19 | 通用电气公司 | Configurable winglet for wind turbine blades |
| WO2011141444A2 (en) * | 2010-05-10 | 2011-11-17 | Technische Universität Darmstadt | Invention relating to rotor blades in particular for wind power installations |
| GB2484435A (en) * | 2006-07-12 | 2012-04-11 | Vacuumschmeize Gmbh & Co Kg | Powder composite magnetic core |
| US20120141274A1 (en) * | 2011-10-06 | 2012-06-07 | General Electric Company | Wind turbine rotor blade with passively modified trailing edge component |
| DE102012103704A1 (en) * | 2011-04-30 | 2012-10-31 | General Electric Co. | Winglet for a rotor wing of a wind turbine |
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2012
- 2012-11-29 CN CN2012104958082A patent/CN102996367A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1563707A (en) * | 2004-03-18 | 2005-01-12 | 上海交通大学 | Horizontal shaft wind mill with small sharp wing |
| GB2484435A (en) * | 2006-07-12 | 2012-04-11 | Vacuumschmeize Gmbh & Co Kg | Powder composite magnetic core |
| CN102220935A (en) * | 2010-04-15 | 2011-10-19 | 通用电气公司 | Configurable winglet for wind turbine blades |
| WO2011141444A2 (en) * | 2010-05-10 | 2011-11-17 | Technische Universität Darmstadt | Invention relating to rotor blades in particular for wind power installations |
| DE102012103704A1 (en) * | 2011-04-30 | 2012-10-31 | General Electric Co. | Winglet for a rotor wing of a wind turbine |
| US20120141274A1 (en) * | 2011-10-06 | 2012-06-07 | General Electric Company | Wind turbine rotor blade with passively modified trailing edge component |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104018996A (en) * | 2014-05-30 | 2014-09-03 | 西安交通大学 | Wind turbine blade with automatic windward area adjustment function |
| CN104018996B (en) * | 2014-05-30 | 2016-06-29 | 西安交通大学 | A kind of blade of wind-driven generator for automatically adjusting front face area |
| CN106884759A (en) * | 2015-12-16 | 2017-06-23 | 北京博比风电科技有限公司 | A kind of blade synergy design for low wind speed area wind power generating set |
| CN108331712A (en) * | 2018-02-27 | 2018-07-27 | 青岛华创风能有限公司 | It is a kind of can noise reducing wind electricity blade |
| CN109271657A (en) * | 2018-07-25 | 2019-01-25 | 许继集团有限公司 | A kind of wind power generating set catches wind coefficient, over the evaluation method of hair hourage |
| CN109271657B (en) * | 2018-07-25 | 2022-12-13 | 许继集团有限公司 | Wind capture coefficient and annual hour number estimation method of wind generating set |
| CN110043423A (en) * | 2019-04-04 | 2019-07-23 | 上海理工大学 | A kind of vertical shaft wind motor of the movable trailing edge blade of band |
| CN110242494A (en) * | 2019-07-25 | 2019-09-17 | 无锡风电设计研究院有限公司 | A kind of movable sawtooth trailing edge structures of wind energy conversion system with wing flap function |
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Application publication date: 20130327 |