CN110486222A - A kind of anti-icing wind electricity blade and wind electricity blade prevent the method to freeze - Google Patents
A kind of anti-icing wind electricity blade and wind electricity blade prevent the method to freeze Download PDFInfo
- Publication number
- CN110486222A CN110486222A CN201910835238.9A CN201910835238A CN110486222A CN 110486222 A CN110486222 A CN 110486222A CN 201910835238 A CN201910835238 A CN 201910835238A CN 110486222 A CN110486222 A CN 110486222A
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- icing
- wind electricity
- electricity blade
- cabinet
- wind
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- 230000005611 electricity Effects 0.000 title claims abstract description 91
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 38
- 238000013016 damping Methods 0.000 claims abstract description 15
- 210000004262 dental pulp cavity Anatomy 0.000 claims abstract description 13
- 230000008014 freezing Effects 0.000 claims description 17
- 238000007710 freezing Methods 0.000 claims description 17
- 239000010687 lubricating oil Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 13
- 238000010586 diagram Methods 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002528 anti-freeze Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 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
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
- F03D80/40—Ice detection; De-icing means
-
- 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)
- Wind Motors (AREA)
Abstract
The invention discloses a kind of anti-icing wind electricity blades, anti-icing cabinet is fixed on the wind electricity blade inner surface, it is connected with two root canal roads on anti-icing wall box, valve is equipped on two pipelines, two root canal roads are used to that the low temperature resistant liquid of high density to be injected or be discharged to box house.Multiple anti-icing cabinets are fixed on wind electricity blade inner surface, the pipeline on multiple anti-icing cabinets all extends to wind turbine blade root, and the valve on each pipeline is arranged at wind turbine blade root.Each anti-icing box house is equipped with demarcation plate, and the setting direction of demarcation plate is vertical with wind electricity blade length direction, and multiple damping holes are offered on demarcation plate.Anti-icing interior and demarcation plate outer surface are all made of rough surface setting.A kind of method that wind electricity blade prevents icing is also disclosed.The present invention gives blade surface continuous heating as impeller rotates when Wind turbines are not shut down using liquid kinetic energy thermal energy transfer principle, prevents the generation of blade surface icing phenomenon, simple and convenient, practical easy to operate.
Description
Technical field
The present invention relates to Wind turbines technical fields, prevent from tying more particularly to a kind of anti-icing wind electricity blade and wind electricity blade
The method of ice.
Background technique
An important component of the wind electricity blade as wind power generating set, its unique aerodynamic configuration play capture
The effect of wind-powered electricity generation.And wind power generating set is under zero degrees celsius and subzero cryogenic conditions when running, if encountering humidity
Freezing phenomena will occur for air, rainwater, salt fog, ice and snow and sleet weather.After wind electricity blade icing, not only blade is pneumatic
Shape is changed, and generated energy is influenced, and serious conditions also result in the occurrence of blade icing overload causes leaf destruction.
At present in wind-powered electricity generation industry, using the mainstream scheme of ice-melt are as follows: 1) use carbon fiber electric heating de-icing technology, covered in blade
Carbon fibre material is added on skin, and company connects with the mains and controller.When blade surface icing, carbon fiber heating power reaches
The purpose of ice-melt.This method is when preparing blade, and complex steps are not easy to operate, and increases cost.2) heat is installed additional in root of blade
Blower send hot wind into blade inner cavity by air-heater, to achieve the purpose that ice-melt.But it, should for big megawatt wind-power blade
The method of ice-melt cannot reach the technical effect of understanding.And existing method requires to operate under Wind turbines shutdown status,
Influence the generating efficiency of Wind turbines.
It can be seen that above-mentioned existing wind electricity blade and wind electricity blade prevent the method to freeze there are still have it is inconvenient with it is scarce
It falls into, and needs to be further improved.How to found a kind of anti-icing wind electricity blade of fresh air and wind electricity blade prevents the side to freeze
Method keeps its simple and convenient and can reach the anti-icing effect of wind electricity blade under not shutdown status, and becoming current industry pole need to change
Into target.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of anti-icing wind electricity blade, keeps its simple and convenient and do not shutting down
The anti-icing effect that can reach wind electricity blade under state, to overcome the shortcomings of that existing wind electricity blade prevents icing method.
In order to solve the above technical problems, the present invention provides a kind of anti-icing wind electricity blade, consolidate on the wind electricity blade inner surface
Surely there is anti-icing cabinet, two mutually independent pipelines are connected on the side wall of the anti-icing cabinet, and be equipped on two pipelines
Valve, two root canal road is for realizing to the anti-icing box house injection or the discharge low temperature resistant liquid of high density.
It is further improved, the anti-icing cabinet is fixedly bonded to the leading edge inner surface of the wind electricity blade, and described anti-icing
The outer shape of cabinet matches with the wind electricity blade leading edge inner surface configuration.
It is further improved, multiple independent anti-icing cabinets is fixed on the wind electricity blade inner surface, it is multiple described
Anti-icing cabinet is arranged along the length direction of the wind electricity blade, and the pipeline on multiple anti-icing cabinets all extends to the wind
The root of electric blade, the valve on each pipeline are arranged at the wind turbine blade root.
It is further improved, each anti-icing box house is equipped with demarcation plate, the setting direction of the demarcation plate and institute
The length direction for stating wind electricity blade is vertical, and multiple damping holes are offered on the demarcation plate.
It is further improved, the anti-icing interior and demarcation plate outer surface are all made of rough surface setting.
It is further improved, the damping hole aperture is 2-3cm.
It is further improved, the anti-icing box house is provided with multiple parallel equidistant demarcation plates.
It is further improved, is respectively arranged with corresponding card slot on the inside of described two opposing sidewalls of anti-icing cabinet, it is described
The both ends of demarcation plate are respectively clamped into the card slot.
It is further improved, the anti-icing cabinet is made of high-strength light material, and the low temperature resistant liquid of high density is adopted
With the low temperature resistant lubricating oil of high density.
The present invention also provides a kind of methods for preventing from freezing of above-mentioned anti-icing wind electricity blade, and the method includes walking as follows
It is rapid:
(1) before needing to prevent wind electricity blade from freezing, the wind electricity blade is rotated to being arranged straight down, is opened simultaneously
The low temperature resistant liquid of high density is perfused to the anti-icing box house, until described in the valve of two root canal roads of the anti-icing cabinet
The volume of the low temperature resistant liquid of high density accounts for the 1/2 to 2/3 of the anti-icing box volume, closes valve；
(2) with the operating of the wind electricity blade, the low temperature resistant liquid of high density wind electricity blade rotary centrifugal force and
Under self gravitation effect, in the anti-icing box house shaking, impact, friction, the kinetic energy of the low temperature resistant liquid of high density turns
Change thermal energy into, thermal energy is dispersed into wind electricity blade surface, prevents the wind electricity blade from freezing；
(3) when not needing prevents wind electricity blade from freezing, the wind electricity blade is rotated to being arranged vertically upwards, is opened simultaneously
The valve for opening two root canal roads of the anti-icing cabinet makes the low temperature resistant liquid discharge of the high density of the anti-icing box house.
By adopting such a design, the present invention has at least the following advantages:
1. the present invention is by being arranged anti-icing cabinet in wind electricity blade inner surface, and in anti-icing cabinet upper connector road, pipeline
Upper setting valve is able to achieve when needed to the purpose of the box house perfusion low temperature resistant liquid of high density, and utilizes the structure,
Make the low temperature resistant liquid of high density in impeller rotation, in box house shaking, impact, friction, makes the low temperature resistant liquid of the high density
Body kinetic energy is converted into thermal energy, and thermal energy is transferred to blade surface again, plays the purpose for preventing blade surface from freezing.
2. the present invention keeps the high density resistance to by opening up damping hole on anti-icing box house setting demarcation plate, demarcation plate
For cryogenic liquid when impeller rotates, by shaking the pressure energy generated, which can promote the liquid high from damping hole again
Speed sprays, and is converted to liquid kinetic energy, then the liquid of high speed ejection is converted into thermal energy further through the impact with demarcation plate, makes it
Temperature increases, which is dispersed into the surface of wind electricity blade, further functions as the effect for preventing wind electricity blade from freezing.
3. can also be further increased highly dense by the way that anti-icing interior and demarcation plate outer surface to be all provided with and be set to rough surface
The thermal energy that low temperature resistant liquid sloshing, impact and friction generate is spent, better anti-icing effect is played.
4. by the way that multiple independent anti-icing cabinets are arranged inside wind electricity blade, and the control valve on each cabinet is equal
It is arranged in root of blade, facilitates operation, conducive to the anti-icing control to blade different parts, and makes it suitable for for big MW class
Wind electricity blade, it is applied widely.
5. anti-icing method of the present invention utilizes liquid kinetic energy thermal energy transfer principle, in the non-stop-machine situation of wind power generating set
Under, blade surface continuous heating is given as impeller rotates, prevention blade surface the phenomenon that freezing, this method is simple and convenient,
It is easy to operate, at low cost.
Detailed description of the invention
The above is merely an overview of the technical solutions of the present invention, in order to better understand the technical means of the present invention, below
In conjunction with attached drawing, the present invention is described in further detail with specific embodiment.
Fig. 1 is the longitudal section schematic diagram of the anti-icing wind electricity blade of the present invention.
Fig. 2 is the cross-sectional of the anti-icing wind electricity blade of the present invention.
Fig. 3 is the structural schematic diagram of anti-icing cabinet in the anti-icing wind electricity blade of the present invention.
Fig. 4 is the partial enlarged view of a-quadrant in Fig. 3.
Fig. 5 is the structural schematic diagram of demarcation plate in the anti-icing wind electricity blade of the present invention.
Specific embodiment
Referring to shown in attached drawing 1 to 4, the specific structure of the anti-icing wind electricity blade of the present embodiment is as follows.Table in the wind electricity blade 10
It is fixed with anti-icing cabinet 1 on face, two mutually independent pipelines 2,3, and two pipelines are connected on the side wall of the anti-icing cabinet 1
2, valve 4,5 is equipped on 3, the two root canals road 2,3 is for realizing to injecting inside the anti-icing cabinet 1 or discharge high density is resistance to low
Geothermal liquid.
Specifically, the anti-icing cabinet 1 is fixedly bonded to the leading edge inner surface of the wind electricity blade 10, and the anti-icing cabinet 1
Outer shape and the leading edge inner surface configuration of the wind electricity blade 10 match.I.e. the anti-icing cabinet 1 is according to leading edge cavity in blade
The cabinet of type face customization is bonded in the up-front appropriate area in blade inner cavity for cabinet is customized using bonded adhesives before vane mold matching.
The anti-icing cabinet 1 is made using light-high-strength material, such as plastic material.
For big megawatt wind-power blade, need to be fixed with multiple independent anti-icing cabinets on 10 inner surface of wind electricity blade
1, multiple anti-icing cabinets 1 are arranged along the length direction of the wind electricity blade 10, and the pipeline on multiple anti-icing cabinets 1 all extends to this
The root of wind electricity blade 10, the valve on each pipeline is arranged at the root of the wind electricity blade 10, and marks.It is sharp in this way
In operation of the operator to valve, controlled convenient for the anti-icing cabinet to blade different parts.
It is further improved, the inside of each anti-icing cabinet 1 is equipped with one or more demarcation plates 6, and multiple demarcation plates 6 are flat
Row is set in qually spaced in cabinet.Specific fixed form are as follows: be respectively arranged with phase on the inside of two opposing sidewalls of the anti-icing cabinet 1
Corresponding card slot 8, the both ends of the demarcation plate 7 are respectively clamped into the card slot 8, realize fixation of the demarcation plate 6 in anti-icing cabinet 1.
The setting direction of the demarcation plate 6 is vertical with the length direction of the wind electricity blade 10, and offers on the demarcation plate 6 more
A damping hole 7.The aperture of the damping hole 7 is 2-3cm, as shown in Fig. 5.Anti-icing cabinets cavity is separated by demarcation plate 6 in this way
At least two regions, in blade rotation, damping hole 7 injection of the internal low temperature resistant liquid of high density on demarcation plate 6 is extremely
Another region.
In order to enhance friction kinetic energy of the low temperature resistant liquid of high density inside anti-icing cabinet 1, the inner surface of the anti-icing cabinet 1
It is all made of rough surface setting with the outer surface of demarcation plate 6, further increases temperature rise effect.
The low temperature resistant liquid of the high density uses the low temperature resistant lubricating oil of high density in the present embodiment, can play antifreeze conduct heat fastly
Effect.
The method for preventing from freezing of above-mentioned anti-icing wind electricity blade, includes the following steps:
(1) come temporarily, that is, before needing to prevent wind electricity blade from freezing, which to be rotated to straight down in winter
Setting, while opening the valve 4,5 on two root canal roads 2,3 of the anti-icing cabinet 1, using a root canal road and under the effect of gravity to
The low temperature resistant liquid of high density is perfused inside each anti-icing cabinet 1, another root canal road is for ventilating, the low temperature resistant lubricating oil of the high density
When adding to 1/2 to 2/3 volume of anti-icing cabinet 1, valve 4,5 is closed.
(2) with the operating of the wind electricity blade 10, rotary centrifugal force of the low temperature resistant lubricating oil of the high density in wind electricity blade 10
Under self gravitation effect, in anti-icing 1 inside shaking of cabinet, impact, friction, when especially lubricating oil shakes in cabinet,
Its active force is converted to the pressure energy of liquid, sprays the lubricating oil being pressurized from narrow thin 7 high speed of damping hole, under
One region；The pressure energy of lubricating oil is converted to liquid kinetic energy in moment, and lubricating oil and 6 phase of demarcation plate of high speed ejection are impacted,
Moment reaches lower-speed state again, and in this process, the kinetic energy of the low temperature resistant lubricating oil of the high density is converted into thermal energy, makes its temperature
It increases, which is dispersed into the surface of wind electricity blade 10, plays the role of preventing the wind electricity blade 10 from freezing.
(3) after passing by winter, that is, when not needing to prevent wind electricity blade from freezing, by the wind electricity blade 10 rotation to vertically to
Upper setting, while the valve 4,5 on two root canal roads 2,3 of the anti-icing cabinet 1 is opened, make the high density inside the anti-icing cabinet 1
Low temperature resistant liquid discharge, mitigates leaf weight, improves generated output.
Wind electricity blade of the present invention prevents the method to freeze using liquid kinetic energy thermal energy transfer principle, and leading edge cavity adds in blade
Vanning body, the interior setting demarcation plate of cabinet and damping hole, tank wall are set as rough surface, are then injected into the damping lubrication of 1/2 to 1/3 volume
Oil.When wind power generating set impeller when rotated, damping lubricating oil due to blade rotate when centrifugal force and the weight of itself
Power effect, active force is converted to the pressure energy of oil when shaking in anti-icing cabinet, then makes the oil being pressurized from narrow thin damping hole
High speed ejection, the i.e. pressure energy of liquid are converted to liquid kinetic energy in moment.Pass through the lubricating oil of high speed ejection and demarcation plate again
Impact, moment reach lower-speed state again.During this, the kinetic energy of lubricating oil passes through between liquid, between liquid and solid
Impact and friction are converted into thermal energy, increase the temperature of lubricating oil, which is dispersed into blade surface, to realize to blade inlet edge
The purpose of continuous heating achievees the effect that prevent blade from freezing.
When the present invention solves wind power generating set and runs under zero degrees celsius and subzero cryogenic conditions, if met
The problem of blade surface icing can occur to humid air, rainwater, salt fog, ice and snow and sleet weather, and can be sent out in wind-force
In the non-stop-machine situation of motor group, blade surface continuous heating is given as impeller rotates, to prevent the phenomenon that blade surface freezes
Occur, it is simple and convenient, easy to operate, at low cost.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, this
Field technical staff makes a little simple modification, equivalent variations or modification using the technology contents of the disclosure above, all falls within this hair
In bright protection scope.
Claims (10)
1. a kind of anti-icing wind electricity blade, which is characterized in that anti-icing cabinet is fixed on the wind electricity blade inner surface, it is described anti-icing
It is connected with two mutually independent pipelines on the side wall of cabinet, and is equipped with valve on two pipelines, two root canal road is used for
It realizes to the anti-icing box house injection or the discharge low temperature resistant liquid of high density.
2. anti-icing wind electricity blade according to claim 1, which is characterized in that be fixed on the wind electricity blade inner surface more
A independent anti-icing cabinet, multiple anti-icing cabinets are arranged along the length direction of the wind electricity blade, and multiple described
Pipeline on anti-icing cabinet all extends to the root of the wind electricity blade, and the valve on each pipeline is arranged at the wind-powered electricity generation leaf
Piece root.
3. anti-icing wind electricity blade according to claim 1, which is characterized in that the anti-icing cabinet is fixedly bonded to the wind
The leading edge inner surface of electric blade, and the outer shape of the anti-icing cabinet and the wind electricity blade leading edge inner surface configuration phase
Match.
4. anti-icing wind electricity blade according to any one of claims 1 to 3, which is characterized in that in each anti-icing cabinet
Portion is equipped with demarcation plate, and the setting direction of the demarcation plate is vertical with the length direction of the wind electricity blade, and the demarcation plate
On offer multiple damping holes.
5. anti-icing wind electricity blade according to claim 4, which is characterized in that outside the anti-icing interior and demarcation plate
Surface is all made of rough surface setting.
6. anti-icing wind electricity blade according to claim 4, which is characterized in that the damping hole aperture is 2-3cm.
7. anti-icing wind electricity blade according to claim 4, which is characterized in that the anti-icing box house is provided with multiple flat
The equidistant demarcation plate of row.
8. anti-icing wind electricity blade according to claim 4, which is characterized in that described two opposing sidewalls of anti-icing cabinet it is interior
Side is respectively arranged with corresponding card slot, and the both ends of the demarcation plate are respectively clamped into the card slot.
9. anti-icing wind electricity blade according to claim 1, which is characterized in that the anti-icing cabinet uses high strength light material
Matter is made, and the low temperature resistant liquid of high density uses the low temperature resistant lubricating oil of high density.
10. a kind of method for preventing from freezing of described in any item anti-icing wind electricity blades of claim 1 to 9, which is characterized in that institute
The method of stating includes the following steps:
(1) before needing to prevent wind electricity blade from freezing, the wind electricity blade is rotated to being arranged straight down, while described in opening
The low temperature resistant liquid of high density is perfused to the anti-icing box house, until described highly dense in the valve of two root canal roads of anti-icing cabinet
The volume for spending low temperature resistant liquid accounts for the 1/2 to 2/3 of the anti-icing box volume, closes valve；
(2) with the operating of the wind electricity blade, the low temperature resistant liquid of high density is in the rotary centrifugal force of wind electricity blade and itself
Under gravity, in the anti-icing box house shaking, impact, friction, the kinetic energy of the low temperature resistant liquid of high density is converted into
Thermal energy, thermal energy are dispersed into wind electricity blade surface, prevent the wind electricity blade from freezing；
(3) when not needing prevents wind electricity blade from freezing, the wind electricity blade is rotated to being arranged vertically upwards, while opening institute
The valve for stating two root canal roads of anti-icing cabinet makes the low temperature resistant liquid discharge of the high density of the anti-icing box house.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910835238.9A CN110486222A (en) | 2019-09-05 | 2019-09-05 | A kind of anti-icing wind electricity blade and wind electricity blade prevent the method to freeze |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910835238.9A CN110486222A (en) | 2019-09-05 | 2019-09-05 | A kind of anti-icing wind electricity blade and wind electricity blade prevent the method to freeze |
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| CN110486222A true CN110486222A (en) | 2019-11-22 |
Family
ID=68556577
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| CN201910835238.9A Pending CN110486222A (en) | 2019-09-05 | 2019-09-05 | A kind of anti-icing wind electricity blade and wind electricity blade prevent the method to freeze |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113915079A (en) * | 2020-07-07 | 2022-01-11 | 福建金风科技有限公司 | Blade auxiliary device, wind generating set blade and wind generating set |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113915079A (en) * | 2020-07-07 | 2022-01-11 | 福建金风科技有限公司 | Blade auxiliary device, wind generating set blade and wind generating set |
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