CN114213972B - Coating applied to deicing of blades of rotating wind turbine and manufacturing method thereof - Google Patents
Coating applied to deicing of blades of rotating wind turbine and manufacturing method thereof Download PDFInfo
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- CN114213972B CN114213972B CN202111466644.6A CN202111466644A CN114213972B CN 114213972 B CN114213972 B CN 114213972B CN 202111466644 A CN202111466644 A CN 202111466644A CN 114213972 B CN114213972 B CN 114213972B
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- 238000000576 coating method Methods 0.000 title claims abstract description 57
- 239000011248 coating agent Substances 0.000 title claims abstract description 55
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 7
- 239000000758 substrate Substances 0.000 claims abstract description 39
- 230000003746 surface roughness Effects 0.000 claims abstract description 10
- 229920002379 silicone rubber Polymers 0.000 claims description 12
- 239000004945 silicone rubber Substances 0.000 claims description 12
- 230000009471 action Effects 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- 239000000741 silica gel Substances 0.000 claims description 9
- 229910002027 silica gel Inorganic materials 0.000 claims description 9
- 239000003960 organic solvent Substances 0.000 claims description 7
- 238000005507 spraying Methods 0.000 claims description 6
- 239000002952 polymeric resin Substances 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 229920003002 synthetic resin Polymers 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 4
- 230000000737 periodic effect Effects 0.000 claims description 4
- 238000007865 diluting Methods 0.000 claims description 3
- 230000002209 hydrophobic effect Effects 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 15
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 230000008014 freezing Effects 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003075 superhydrophobic effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- -1 and more preferably Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000008859 change Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
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- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- UQEAIHBTYFGYIE-UHFFFAOYSA-N hexamethyldisiloxane Chemical compound C[Si](C)(C)O[Si](C)(C)C UQEAIHBTYFGYIE-UHFFFAOYSA-N 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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- 238000000926 separation method Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D201/00—Coating compositions based on unspecified macromolecular compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/52—Two layers
- B05D7/54—No clear coat specified
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- 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
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2530/00—Rubber or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2230/00—Manufacture
- F05B2230/90—Coating; Surface treatment
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2280/00—Materials; Properties thereof
- F05B2280/60—Properties or characteristics given to material by treatment or manufacturing
- F05B2280/6011—Coating
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Wind Motors (AREA)
Abstract
The invention provides a coating applied to deicing of blades of a rotary wind turbine and a manufacturing method thereof, wherein the coating consists of a rigid substrate with the thickness of 0.3-0.5 mm and the surface roughness of 0.2-0.4 mm and a micro-deformation elastic layer with the thickness of 0.3-0.5 mm and the elastic modulus of 5 kPa-20 kPa; the rigid substrate is solidified after being thermally fused and adhered with the surface of the wind turbine blade to form a porous surface structure; the elastic layer is adhered on the rigid substrate and mutually hooked with the rigid substrate. Because the surface roughness of the rigid substrate is high, the thicknesses of different positions of the elastic layer are different, and the deformation under stress is different, an air gap is generated between the ice layer and the elastic layer, the adhesion force of the ice layer is reduced, and the ice layer falls off. The coating applied to deicing of the blades of the rotating wind turbine is simple to prepare, low in cost and easy to popularize.
Description
Technical Field
The invention relates to the technical field of deicing of wind driven generators, in particular to a coating applied to deicing of blades of a rotating wind turbine and a manufacturing method thereof.
Background
About 40% of the unit capacity of China works in high-cold and high-humidity areas. When the wind driven generator works in a high-cold and high-humidity area, the surface of the blade is easy to freeze, the unit is forced to stop by too thick freezing, the generating power is reduced, otherwise, the unit collapses, and the falling of ice blocks on the blade can threaten the personal safety. The icing on the fan blade mainly comprises open ice, frost ice and mixed ice. The ice is a transparent hard ice block formed under the conditions of slight cold, rain and high wind speed, and the density is more than 900kg/m < 3 >; the frost ice is white opaque crystal crushed ice formed under the condition of extremely cold wind speed, and the density is below 600kg/m < 3 >; the forming condition and the form of the mixed ice are between those of open ice and frost ice, and the density is 600-900kg/m < 3 >. The density of the open ice and the mixed ice is high, and the damage to the fan is large. Icing conditions of different positions on the blade are different, the line speed of a tip part occupying 1/3 of the total length of the blade is high, the blade collides with supercooled water drops frequently, and the icing thickness is the largest.
The existing fan deicing technologies can be divided into two types:
active deicing: energy is input from the outside to heat the surface of the blade, ice blocks on the contact surface are melted, the adhesion force of the ice blocks on the surface is reduced, and the ice is thrown off by using centrifugal force. Active de-icing includes electro-thermal de-icing, microwave de-icing, airflow de-icing, and the like. The electrothermal deicing method comprises laying a layer of resistance heating element (such as carbon cloth) on the blade, and supplying heat via external power supply; microwave deicing guides microwave energy to the surface of the blade, and the temperature of the surface of the blade is increased by using the microwave energy; the airflow de-ice creates a circulating warm flow within the blade cavity that transfers heat from the inner surface to the outer surface of the blade. For example, chinese patent publication No. CN107939620A discloses an anti-icing and deicing system for fan blades, which includes a gas-heated anti-icing device, an expansion tube deicing device, an electric heating deicing device, a layer deicing device, and a monitoring control device, wherein the electric heating deicing device includes a plurality of resistance wires arranged on the fan blades in parallel.
Although the active deicing technology has high heating efficiency, fast temperature rise and capability of deicing rapidly, the main defects are as follows: (1) the energy consumption of heating is large; (2) the heating element is susceptible to lightning strikes; and (3) the equipment is complex and is not easy to maintain.
Passive deicing: the chemical coating is coated on the surface of the blade, the characteristics of the contact surface are changed, so that ice blocks are difficult to form on the blade or can be easily thrown off after the ice blocks are formed, and compared with active deicing, the energy consumption is avoided, and the use is simple. Passive deicing includes chemicals, superhydrophobic coatings, ultra-smooth coatings, and the like.
However, chemical drugs such as isopropanol, ethylene glycol, ethanol and the like are sprayed on the surface of the blade to lower the freezing point and prevent icing, and the method has short action time and pollution; the super-hydrophobic coating prevents condensation of water drops by reducing the contact angle of the surface, and the method has poor deicing effect and is not durable; the ultra-smooth coating forms a layer of lubricating water film on the contact surface to reduce the adhesion of ice, and the method has good effect, but has complex preparation and high cost.
Disclosure of Invention
The invention provides a coating applied to deicing of a rotating wind turbine blade and a manufacturing method thereof.
A coating applied to deicing of blades of a rotary wind turbine consists of a rigid substrate with the thickness of 0.3-0.5 mm and the surface roughness of 0.2-0.4 mm and a micro-deformation elastic layer with the thickness of 0.3-0.5 mm and the elastic modulus of 5-20 kPa.
The rigid substrate is used for being solidified after being hot-melted and bonded with the surface of the wind turbine blade to form a porous surface structure; the elastic layer is adhered to the rigid substrate and mutually hooked with the rigid substrate.
Because the surface roughness of the rigid substrate is high, the thicknesses of the elastic layer at different positions are different, and the deformation under stress is different.
Aiming at the working environment of the rotating wind turbine blade and in order to prolong the service life of the deicing coating, the preferable rigid substrate is solid meltable polymer resin with high surface roughness, and the elastic layer and the rigid substrate are mutually hooked to ensure that the elastic layer and the rigid substrate are tightly fixed.
In order to improve the use effect of the deicing coating, the elastic layer is preferably a combination of silicone rubber and silica gel according to a mass ratio of 9.
For the convenience of coating preparation, the elastic layer is preferably prepared by combining silicone rubber and silica gel, diluting with organic solvent, and uniformly spraying onto the rigid substrate, and more preferably, the organic solvent is absolute ethyl alcohol or hexamethyldisiloxane
In order to further improve the application effect of the deicing coating, it is preferred that the elastic layer is a hydrophobic smooth surface with a contact angle of 115 ° to 125 °.
In order to ensure the deicing effect of the deicing coating, prolong the service life and reduce the use cost, the total thickness of the coating is 0.8 mm-1 mm. The coating is too thin, so that a good deicing effect cannot be achieved; too thick a coating may affect the service life of the coating, may also destroy the aerodynamic properties of the wind turbine blade, and may increase the cost of use.
After the coating is coated with ice, under the action of centrifugal force and periodic gravity, the elastic layer on the coating deforms, air pockets are generated between the elastic layer and the ice layer, the adhesion force of the ice layer is reduced, and the ice layer falls off under the action of the centrifugal force.
Specifically, in the fan operation process, the elastic layer takes place to warp under the effect of tangential force, because the different position thickness of elastic layer is different, the deflection under the atress is different, and at local area, the ice sheet produces the air gap with the elastic layer separation, and under the effect of centrifugal force and periodic gravity, the air gap increase, the adhesion on ice sheet reduces, and along with the increase of freezing thickness, the centrifugal force that the ice-cube received increases simultaneously, and final ice sheet drops under the effect of centrifugal force.
The invention also provides a manufacturing method of the deicing coating applied to the blades of the rotating wind turbine, which comprises the following steps:
(1) Cleaning the surface of the wind turbine blade;
(2) Spraying heated solid meltable polymer resin on the surface of the wind turbine blade to form a rigid substrate with a porous surface structure;
(3) Mixing silicone rubber and silica gel according to a mass ratio of 9;
(4) Diluting the mixed silicone rubber and silica gel with an organic solvent according to the mass ratio of 3;
(5) Spraying an elastic layer on the rigid substrate;
(6) And forming the deicing coating after the elastic layer is dried.
Further, in the step (2), the thickness of the rigid substrate with the porous surface structure is 0.3 mm-0.5 mm; in the step (5), the thickness of the elastic layer is 0.3 mm-0.5 mm.
Further, in the step (6), the rigid substrate of the dried deicing coating and the elastic layer are mutually hooked to prevent the elastic layer from falling off, so that the service life of the elastic layer is prolonged.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, through the combination of the rigid substrate and the elastic layer, the adhesion force of the ice layer is reduced, so that the ice layer can fall off under the action of the centrifugal force generated by the rotation of the wind turbine blade when the thickness of the ice layer is very thin, the condition that the wind driven generator is stopped due to icing is avoided, and the generating capacity of the wind turbine is improved. The coating is simple to prepare, low in cost and easy to popularize.
Drawings
FIG. 1 is a schematic view of a coating structure of the present invention applied to deicing blades of rotating wind turbines;
FIG. 2 is a graph of test blade icing thickness versus time for an embodiment of the present invention;
FIG. 3 illustrates an icing condition of a wind turbine blade tested according to an embodiment of the invention.
In the figure: 1-surface of wind turbine blade; 2-a rigid substrate; 3-an elastic layer; 4-ice layer; 5-air gap.
Detailed Description
The invention will be described in further detail below with reference to the drawings and examples, which are intended to facilitate the understanding of the invention without limiting it in any way.
As shown in figure 1, the coating applied to deicing of the blades of the rotating wind turbines consists of a rigid substrate 2 with the thickness of 0.4mm and the surface roughness of 0.3mm and a micro-deformation elastic layer 3 with the thickness of 0.4mm and the elastic modulus of 10 kPa.
The rigid substrate 2 and the surface 1 of the wind turbine blade are solidified after being subjected to hot melt adhesion, and a porous surface structure is formed; the elastic layer 3 is adhered to the rigid substrate 2 and is interlocked with the rigid substrate 2. Because the surface roughness of the rigid substrate 2 is high, the thickness of the elastic layer 3 is different at different positions, and the deformation amount under stress is different.
Aiming at the working environment of the rotating wind turbine blade and in order to prolong the service life of the deicing coating, the rigid substrate 2 is solid meltable polymer resin, the surface roughness is high, and the elastic layer 3 is mutually hooked with the rigid substrate 2, so that the elastic layer 3 is tightly fixed with the rigid substrate 2.
In order to improve the effectiveness of the deicing coating, the elastomeric layer 3 is a combination of silicone rubber and silicone gel in a mass ratio 9.
In order to facilitate the preparation of the coating, the elastic layer 3 is formed by combining silicone rubber and silica gel, and then is uniformly sprayed on the rigid substrate 2 after being diluted by an organic solvent, wherein the organic solvent is absolute ethyl alcohol.
In order to further improve the application effect of the deicing coating, the elastic layer 3 is a hydrophobic smooth surface with a contact angle of 115 ° to 125 °.
In order to ensure the deicing effect of the deicing coating, prolong the service life and reduce the use cost, the thickness of the coating is 0.8-1 mm. The coating is too thin, so that a good deicing effect cannot be achieved; too thick a coating may affect the service life of the coating, may also destroy the aerodynamic properties of the wind turbine blade, and may increase the cost of use.
In order to improve the use effect of the deicing coating, the elastic layer 3 deforms under the action of tangential force, and the deformation amount under the action of force is different due to different positions and thicknesses of the elastic layer 3.
As shown in fig. 1, in a local area, the ice layer 4 is separated from the elastic layer 3 to generate an air gap 5, and under the action of centrifugal force and periodic gravity, the air gap 5 is increased, the adhesion force of the ice layer 4 is reduced, and simultaneously, the centrifugal force to which the ice cubes are subjected is increased along with the increase of the thickness of the ice cubes, and finally, the ice layer 4 falls off under the action of the centrifugal force.
In order to verify the effect of the invention, a local stress coating is coated on a small fan in a certain test, three blades of a small wind turbine are marked as a first blade, a second blade and a third blade, wherein the first blade is not coated with the coating and is used as a blank control; and coating the blade tips of the second blade and the third blade.
The blade coated with the coating is assembled on a wind turbine, the blade is observed every other hour under the icing meteorological condition, the icing thickness of the wind turbine blade is recorded, and the icing thickness of the blade changes with time as shown in figure 2.
As time increases, the icing thickness of uncoated blades increases over time, while the icing thickness of coated blades does not change much. The icing condition of the wind turbine blade after 5h of the test is shown in FIG. 3, wherein (a) is the icing condition of the first blade, (b) is the icing condition of the second blade, and (c) is the icing condition of the third blade. Through measurement, the blade is uncoated, the icing thickness of 5h is 57.0mm, the blade II and the blade III are coated, the icing thickness of 5h is 2.5mm and 3.0mm respectively, and the icing thickness is far smaller than that of the blade I.
The results of the above experiments demonstrate that: the deicing coating can obviously reduce the accumulation of ice blocks on the surface of the blade, can enable the blade to spin and remove the ice blocks more quickly, and can achieve the deicing effect.
The embodiments described above are intended to illustrate the technical solutions and advantages of the present invention, and it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, additions and equivalents made within the scope of the principles of the present invention should be included in the scope of the present invention.
Claims (7)
1. A coating applied to deicing of blades of a rotary wind turbine is characterized by comprising a rigid substrate with the thickness of 0.3-0.5 mm and the surface roughness of 0.2-0.4 mm and a micro-deformation elastic layer with the thickness of 0.3-0.5 mm and the elastic modulus of 5-20 kPa; the rigid substrate is used for being solidified after being hot-melted and bonded with the surface of the wind turbine blade to form a porous surface structure; the elastic layer is adhered to the rigid substrate and is mutually hooked with the rigid substrate;
after the coating is coated with ice, under the action of centrifugal force and periodic gravity, the elastic layer on the coating deforms, air pockets are generated between the elastic layer and the ice layer, the adhesion force of the ice layer is reduced, and the ice layer falls off under the action of the centrifugal force.
2. The coating as claimed in claim 1, wherein the rigid substrate is a solid meltable polymer resin.
3. The coating applied to deicing blades of rotating wind turbines as claimed in claim 1, wherein said elastomeric layer is a combination of silicone rubber and silicone rubber in a mass ratio of 9.
4. The coating applied to deicing blades of rotating wind turbines as claimed in claim 1, wherein the elastic layer is formed by combining silicone rubber and silica gel, and then uniformly spraying the silicone rubber and silica gel onto a rigid substrate after being diluted by an organic solvent.
5. The coating applied to deicing blades of rotating wind turbines as claimed in claim 1, wherein said elastomeric layer is a hydrophobic smooth surface having a contact angle of 115 ° to 125 °.
6. The coating applied to deicing blades of rotating wind turbines as claimed in claim 1, wherein the total thickness of the coating is 0.8mm to 1mm.
7. The manufacturing method of the deicing coating applied to the blades of the rotary wind turbines according to any one of claims 1 to 6, characterized by comprising the following steps of:
(1) Cleaning the surface of the wind turbine blade;
(2) Spraying heated solid meltable polymer resin on the surface of the wind turbine blade to form a rigid substrate with a porous surface structure; the thickness of the rigid substrate is 0.3mm to 0.5mm, and the surface roughness is 0.2mm to 0.4 mm;
(3) Mixing silicone rubber and silica gel according to a mass ratio of 9;
(4) Diluting the mixed silicone rubber and silica gel with an organic solvent according to a mass ratio of 3;
(5) Spraying an elastic layer on the rigid substrate; the thickness of the elastic layer is 0.3mm to 0.5mm, and the elastic modulus is 5-20 kPa;
(6) And forming a deicing coating after the elastic layer is aired, and mutually hooking the rigid substrate of the aired deicing coating and the elastic layer to prevent the elastic layer from falling off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111466644.6A CN114213972B (en) | 2021-12-03 | 2021-12-03 | Coating applied to deicing of blades of rotating wind turbine and manufacturing method thereof |
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