CN205858578U - A kind of R aerofoil profile root case blade construction design for promoting Wind turbines power - Google Patents
A kind of R aerofoil profile root case blade construction design for promoting Wind turbines power Download PDFInfo
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- CN205858578U CN205858578U CN201620396518.6U CN201620396518U CN205858578U CN 205858578 U CN205858578 U CN 205858578U CN 201620396518 U CN201620396518 U CN 201620396518U CN 205858578 U CN205858578 U CN 205858578U
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- aerofoil profile
- wind turbines
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- 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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Abstract
Main task of the present utility model is to construct a kind of new aerodynamic configuration at root of blade.In the case of to blade without any destruction, by a kind of R aerofoil profile root box structure of design, improving in low wind speed resource-area, type power is in more than 1.5MW, the generating capacity of the big megawatt-level wind unit that impeller diameter is more than 77 meters.The utility model has the advantages that by increasing less material at root of blade, root trailing edge position is realized actual widening, add the wind catching area of blade surface, blade lifting resistance ratio is made to increase, delay the air-flow trend that boundary-layer separates when the big angle of attack, improve the air-flow flow condition at blade surface.By installing the root box structure after optimization additional, improve blade stiffness, the ability making root of blade trailing edge antagonism flexing increases, avoid fatigue and cracking phenomena that traditional blades root is likely to occur in running, be effectively improved low wind speed region, MW class, the generating capacity of big blade Wind turbines.
Description
Technical field
This patent relates to technical field of wind power generation, particularly relates to a kind of for promoting the low wind speed region big blade of MW class
The R aerofoil profile root case blade construction design of Wind turbines power.
Background technology
China's Wind Power Generation Industry experienced by the high speed development in Eleventh Five-Year Plan period, high wind speed Feng Qu market is carved up substantially
Complete, low wind speed and wind district becomes wind-powered electricity generation industry new round investment priority.Low wind speed wind-powered electricity generation is as China's most area wind energy money
The form of expression in source, potentiality to be exploited is huge, have close load center, grid-connected convenience, net capacity requirement relatively low, to electrical network
The advantages such as management and running impact is little, but the low key problem being to restrict its development of wind energy conversion efficiency.For solving this problem, mesh
Countermeasure on front market increases rotor diameter generally by lengthened blades and increases the mode of tower height, these
Method can increase the conversion efficiency of wind energy to a certain extent, but the blower fan weight increase produced therewith, cost increase, unit
The problems such as safety is affected, govern the development of wind energy efficiency switch technology always, and effect is the most inconspicuous.
Blade is the critical component that wind power generating set effectively captures wind energy.Wind turbines catches height and the blade of wind energy power
Aerofoil profile have close relationship, aerofoil profile is as one of form of expression after aerodynamic optimization of blade, to blade
Aerodynamic characteristics has important impact.One good aerofoil profile has higher lift-drag ratio, and then blower fan can reach relative
High wind energy conversion efficiency.But blower fan is in normal course of operation, the blade tip of blade and blade root branch produce and hinder blower fan fortune
The eddy current of row, makes the conversion efficiency of wind energy reduce.
Summary of the invention
For above not enough, the purpose of this patent is for low wind speed region, MW class, big blade Wind turbines, especially
Be power at more than 1.5MW, impeller diameter unit more than 77 meters simultaneously, design a kind of leaf that can be effectively improved generated energy
Sheet power ascension structure, thus improve low wind speed region, MW class, the generating capacity of big blade Wind turbines.
When blade normally works, preferable duty is that the air-flow of blade surface can form attachment well without separating
Flowing, but in unit actual moving process, affected by the angle of attack, vane airfoil profile and thickness etc. factor, and air-flow is before flowing through
Released state in various degree just occurs after edge, and the angle of attack is the biggest, and the degree that air-flow separates with blade will increase therewith, point
Air-flow from district can form bigger eddy current because losing aerofoil profile effect, and this can increase the running resistance of blade, reduces unit
Wind energy conversion efficiency.
In order to avoid the generation of above-mentioned eddy current, and realizing promoting Wind turbines power purpose, this patent passes through techniques below
Scheme realizes:
By to traditional blades leaf root part, such as Fig. 1, carrying out, based on aerodynamic Optimal improvements, forming new gas
Dynamic profile, such as Fig. 2.
This utility model patent relates to blade root 1；Blade inlet edge 2；Trailing edge 3；Blade pressure surface 4；Blade suction surface
5；Wing fence 6；End plate 7；Root case pressure face 8；Root case suction surface 9；Root case floor 10.
Blade, in running, can produce pressure differential between pressure face and the suction surface of blade, and the existence of pressure reduction makes pressure
The air-flow in power face is walked around blade surface and is blowed to suction surface, and air-flow is destroyed in the preferable two-dimensional flow situation of blade surface,
Eddy current can be produced simultaneously, increase the running resistance of blade.
The leaf root part of blade, relatively rotates speed the highest, but the throughput owing to passing through is big, and a part of air-flow is by cabin
Stop is returned, and simultaneous wheels hub portion is also rotating, and under the immixture of these factors above-mentioned, will produce fall at leaf root part
The eddy current of low blower fan conversion efficiency.
For avoiding the impact on blower fan service efficiency of the above-mentioned eddy current, I takes charge of this R aerofoil profile root case blade construction of invention and sets
Meter, is optimized existing blade root position aerodynamic configuration and is improved, in order to improve the generated energy of Wind turbines.
The main task of this patent is to construct a kind of new aerodynamic configuration at root of blade.To blade without any destruction
In the case of, to construct more rational aerodynamic surface design, increase the fewest material, take construction the most simple to operation
Technique, that improves blade to greatest extent catches wind efficiency, improves Wind turbines generated energy.Another task is by design one
Kind of R aerofoil profile root box structure, improves in low wind speed resource-area, type power at more than 1.5MW, impeller diameter more than 77 meters big
Megawatt-level wind unit catch wind energy power, improve the generating capacity of this region Wind turbines.
This patent need root of blade construct a kind of new aerodynamic configuration, this profile use NACA series aerofoil sections or from
Definition series aerofoil sections constructs.Need to increase a casing in root trailing edge position, such as Fig. 3, Fig. 4.Box shape is mainly by root
Several parts compositions such as case pressure face, root case suction surface, root case floor, end plate, wing fence.Casing width is from blade inlet edge rear
Exhibition is above trailing edge, and length direction becomes narrow gradually with blade shape to blade tip from blade root, and profile torsional angle is consistent with twist angle of blade.
This patent is equivalent to, by installing root box structure additional, be widened root of blade trailing edge direction, outer surface and leaf
Sheet surface seamlessly transits, and is optimization based on original blade aerodynamic profile and improvement.
This structure can be effectively improved the air-flow flow condition at blade surface, makes the lift-drag ratio of blade increase, stall point
Postpone, reduce the adverse pressure gradient of suction surface, thus the trend that when slow down the big angle of attack, boundary-layer separates.This structure makes laminar flow
The width of boundary region increases, and air-flow can be tried one's best and is attached to blade surface for a long time, and improve blade catches wind energy power.With
Time, root of blade is also played the booster action in structure, makes blade stiffness increase by this body structure, thus after adding blade root
The pressure stability energy of edge position.
In this R aerofoil profile root box structure, described case pressure face and root case suction surface, be the main part constituting root case surface
Point.Wind-resources characteristic according to wind field and the aerodynamic characteristic of blade, in conjunction with aerodynamics analysis, determine root case pressure face and root
Case suction surface curve form.Fitting with type with the pressure face of blade and suction surface direction respectively in two sides, slips over blade inlet edge light
Cross, cover on trailing edge.Play the effect that trailing edge is widened, increase the effective wind area of blade with this, make air-flow energy
Enough at blade surface adsorption flow as far as possible for a long time, thus reduce the blade loss in efficiency in trailing edge direction.
Described case floor is " Y " word shape flat board, is upside down on trailing edge, with blade contact face and root case pressure
Face, suction surface are fitted with type.Main Function is to be internally formed support at root case, and several pieces of floors are by equidistant, parallel arrangement
Mode, supports root case pressure face and root case suction surface, is formed by width to the body structure of narrow gradual change.
Described wing fence is arranged on the wider side of root case, i.e. casing root, near blade root direction.Be one piece with radian
Bent plate, radian direction is convex to root case side, realizes fitting, in the wider side of root case with type with blade contact face and root case contact surface
Play support and plugging action.Wing fence, by rotating with blade, can stop the eddy current that wheel hub direction is formed to a certain extent,
Weakening air-flow exhibition on blade, to flowing, makes this fraction redirect to blade lift direction, alleviates the resistance that blade runs
Power.
The top of described end plate i.e. R aerofoil profile root case, narrows from the width with root box shape, is a block length strip curved surface bent plate.
By fitting with type with root case each several part, space, root box top is formed closure, root case is played support and reinforcement effect simultaneously.
The end plate change of shape by self, separates root case pressure face and root case suction surface, in root box top with described case floor
Form one fixed width at closing, so can effectively guide air-flow to smoothly pass on root case surface, weaken after air-flow passes through at leaf
The eddy current that sheet trailing edge is formed.
It is an advantage of the invention that the performance spy of the wind-resources characteristic according to disparity items, blade aerodynamic characteristic, installation unit
Property, in conjunction with factors such as production and installation costs, being customized, personalized designs, to realize meeting every safety index
Under premise, promote the generated output of Wind turbines.By increasing less material at root of blade, root trailing edge position is realized
Actual widen, add the wind catching area of blade surface, make blade lifting resistance ratio increase, delayed air-flow attached when the big angle of attack
The trend that surface layer separates, improves the air-flow flow condition at blade surface.
The present invention without any destruction, uses the production technology identical with traditional blades, by installing additional to original blade construction
Root box structure after optimization, improve blade stiffness, makes the ability of root of blade trailing edge antagonism flexing increase, it is to avoid conventional leaf
Fatigue that sheet root is likely to occur in running and cracking phenomena, be effectively improved low wind speed region, MW class, big blade
The generating capacity of Wind turbines.
Accompanying drawing explanation
Fig. 1, traditional blade design schematic diagram
Fig. 2, the R aerofoil profile root case invention schematic diagram of this patent
Fig. 3, the R aerofoil profile root box structure schematic diagram-1 of this patent
Fig. 4, the R aerofoil profile root box structure schematic diagram-2 of this patent
Detailed description of the invention
The above-mentioned R aerofoil profile root case blade construction design invention for promoting Wind turbines power, both can produce at blade
In the stage, directly implement on finished product blade, it is also possible in concrete wind energy turbine set project, after the fan blade run is carried out
Phase transforms.
In order to realize the purpose of Wind turbines power ascension, it is necessary for installing following assembly additional: root of blade is used for
Extend the R aerofoil profile root box structure of trailing edge.Can transform based on traditional blades structure when being embodied as, required pneumatic department
The production of part and installation, all can use the production technology of traditional blades.Parts produce can use priming by vacuum, laminating etc.
Technique realizes, and installation can use hands to stick with paste the techniques such as fiber cloth reinforcement, structure glue bonding, putty filling, polishing and realize.
Claims (5)
1., for promoting a R aerofoil profile root case blade construction for low wind speed region MW class big blade Wind turbines power, it is special
Levying and be, construct a kind of new aerodynamic configuration at root of blade, this aerodynamic configuration is body structure, and casing width is from blade
Leading edge rear is opened up above trailing edge, and length direction becomes narrow gradually with blade shape to blade tip from blade root, and profile torsional angle is turned round with blade
Angle is consistent.
R aerofoil profile root for promoting low wind speed region MW class big blade Wind turbines power the most according to claim 1
Case blade construction, it is characterised in that install root case pressure face and root case suction surface, two sides profile in curved surface additional at root of blade, divide
Not with the pressure face of blade and suction surface direction with type laminating, smoothly transit with blade inlet edge, cover on trailing edge.
R aerofoil profile root for promoting low wind speed region MW class big blade Wind turbines power the most according to claim 1
Case blade construction, it is characterised in that install root case floor additional at root of blade, described floor is " Y " word shape flat board, is upside down in leaf
On sheet trailing edge, fitting with type with blade contact face and root case pressure face, suction surface, floor is internal equidistantly at root case, parallel
Cloth.
R aerofoil profile root for promoting low wind speed region MW class big blade Wind turbines power the most according to claim 1
Case blade construction, it is characterised in that install wing fence additional at root of blade, described wing fence is arranged on root case root, near blade root direction,
Being the bent plate with radian, radian direction is convex to root case side, realizes fitting with type with blade contact face and root case contact surface.
R aerofoil profile root for promoting low wind speed region MW class big blade Wind turbines power the most according to claim 1
Case blade construction, it is characterised in that install end plate additional at root of blade, described end plate narrows from the width with root box shape, for strip
Shape curved surface bent plate, by fitting with type with root case each several part, forms closure to space, root box top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620396518.6U CN205858578U (en) | 2016-05-05 | 2016-05-05 | A kind of R aerofoil profile root case blade construction design for promoting Wind turbines power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620396518.6U CN205858578U (en) | 2016-05-05 | 2016-05-05 | A kind of R aerofoil profile root case blade construction design for promoting Wind turbines power |
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| CN205858578U true CN205858578U (en) | 2017-01-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106545465A (en) * | 2017-01-25 | 2017-03-29 | 北京博比风电科技有限公司 | Postpone to separate trailing edge blade |
| CN107061142A (en) * | 2017-01-25 | 2017-08-18 | 北京博比风电科技有限公司 | Blade and wind power generating set |
-
2016
- 2016-05-05 CN CN201620396518.6U patent/CN205858578U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106545465A (en) * | 2017-01-25 | 2017-03-29 | 北京博比风电科技有限公司 | Postpone to separate trailing edge blade |
| CN107061142A (en) * | 2017-01-25 | 2017-08-18 | 北京博比风电科技有限公司 | Blade and wind power generating set |
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