CN112452684A - Fan blade coating and preparation method thereof - Google Patents

Fan blade coating and preparation method thereof Download PDF

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Publication number
CN112452684A
CN112452684A CN202011285464.3A CN202011285464A CN112452684A CN 112452684 A CN112452684 A CN 112452684A CN 202011285464 A CN202011285464 A CN 202011285464A CN 112452684 A CN112452684 A CN 112452684A
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China
Prior art keywords
fan blade
layer
putty
coating
primer
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Pending
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CN202011285464.3A
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Chinese (zh)
Inventor
张金玲
王玉红
姜岩岩
王絮飞
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Guodian United Power Technology Chifeng Co Ltd
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Guodian United Power Technology Chifeng Co Ltd
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Priority to CN202011285464.3A priority Critical patent/CN112452684A/en
Publication of CN112452684A publication Critical patent/CN112452684A/en
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    • 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
    • B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
    • B05D5/083—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface involving the use of fluoropolymers
    • 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
    • B05D7/56—Three layers or more
    • B05D7/58—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
    • C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
    • C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
    • C09D127/12—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • 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
    • C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
    • 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
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • 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
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/002—Priming paints
    • 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
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/34—Filling pastes
    • 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
    • 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
    • B05D2503/00—Polyurethanes
    • 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
    • B05D2504/00—Epoxy polymers
    • 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
    • B05D2506/00—Halogenated polymers
    • B05D2506/10—Fluorinated polymers
    • 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
    • B05D2601/00—Inorganic fillers
    • B05D2601/20—Inorganic fillers used for non-pigmentation effect
    • B05D2601/24—Titanium dioxide, e.g. rutile
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2237—Oxides; Hydroxides of metals of titanium
    • C08K2003/2241—Titanium dioxide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention discloses a fan blade coating and a preparation method thereof, wherein the coating comprises a putty layer, a primer layer, an intermediate paint layer and a finish paint layer, wherein the putty layer is coated on the area of a fan blade to be repaired; the primer layer is coated outside the fan blade and the putty layer; the intermediate paint layer is coated outside the primer layer; the surface paint layer is coated outside the intermediate paint layer and is made of nano TiO2The modified fluorocarbon coating is formed by coating, the thickness of the finish paint layer is 50-70 um, wherein, the nano TiO2The mass content in the fluorocarbon coating is 1-5%. The invention sequentially coats a putty layer, a primer layer, an intermediate paint layer and a finish paint layer on the fan blade to ensure that the finish paint layer is attached to the fan blade, and then the nano TiO is used for coating the surface of the fan blade with the lacquer layer2The modified fluorocarbon coating can be used as a finish paint for a finish paint layer, and the surface wear resistance of the fan blade can be improved, so that the protection grade of the fan blade is improved, the maintenance cost of the blade is reduced, and the reliability of a blade product is improved.

Description

Fan blade coating and preparation method thereof
Technical Field
The invention belongs to the technical field of fan blades, and particularly relates to a fan blade coating and a preparation method thereof.
Background
In recent years, the wind power industry tends to develop towards a large-blade type offshore wind field, so that the larger the wind power blade is, the higher the maintenance cost is. However, the blades are often impacted and abraded by rain, dust and sand and the like in the operation process, and are influenced by a humid environment in the south, and a large amount of stains and a large amount of organic matters are stored on the surfaces of the blades, so that the aging and the erosion of the blades are easily accelerated. Especially on the windward side, the damage of the protective coating on the surface of the blade directly affects the aerodynamic performance of the blade of the wind driven generator, thereby affecting the generating efficiency of the fan. If the surface coating of the blade loses the protection function, the exposed glass fiber reinforced plastic substrate of the blade is directly corroded, so that the structural safety of the blade is influenced.
The traditional protection system of the wind driven generator blade is usually a polyurethane paint and gel coat system, and front edge protection paint or gel coat with better wear resistance or front edge protection polyurethane film with better wear resistance is added on the front edge of the blade. Although the front edge protective film can ensure uniform thickness, the front edge protective film has high construction difficulty and difficult maintenance, and the protective film is attached to the outermost layer of the blade, so that the ultraviolet aging resistance is poor, and the maintenance difficulty of the blade is increased.
In view of the technical defects, the invention creates a novel surface protection method and a novel protection structure for the wind power blade, and improves the surface wear resistance of the blade, thereby improving the protection grade of the blade, reducing the maintenance cost of the blade and improving the reliability of the blade product.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a fan blade coating and a preparation method thereof.
In one aspect, the present invention provides a fan blade coating, comprising:
the putty layer is coated on the area of the fan blade to be repaired;
the primer layer is coated outside the fan blade and the putty layer;
the intermediate paint layer is coated outside the primer layer;
the surface paint layer is coated outside the intermediate paint layer and is made of nano TiO2The modified fluorocarbon coating is formed by coating, the thickness of the finish paint layer is 50-70 um, wherein, the nano TiO is2The mass content in the fluorocarbon coating is 1-5%.
Further, the putty used in the putty layer is one of polyurethane putty and epoxy system putty.
Furthermore, the primer used in the primer layer is one of epoxy zinc-rich primer, epoxy zinc phosphate primer and fluorocarbon primer.
Further, the intermediate paint used in the intermediate paint layer is one of epoxy micaceous iron intermediate paint, epoxy intermediate paint, polyurethane intermediate paint and fluorocarbon intermediate paint.
Further, the nano TiO2Is one or the mixture of anatase type nano titanium dioxide and rutile type nano titanium dioxide.
The invention also provides a preparation method of the fan blade coating, which comprises the following steps:
(1) cleaning and polishing the surface of the fan blade;
(2) performing putty layer repairing on the area needing to be repaired on the fan blade, and enabling the putty layer to be in smooth transition with the surface of the fan blade around;
(3) covering the surface of the fan blade and the putty layer with primer so as to form a primer layer on the fan blade;
(4) coating intermediate paint on the front edge of the fan blade, and then coating the surface and the front edge of the whole fan blade with the intermediate paint again to form an intermediate paint layer on the fan blade;
(5) and firstly coating finish paint on the front edge of the fan blade, and then coating finish paint on the surface and the front edge of the whole fan blade again to form a finish paint layer with the thickness of 50-70 um on the fan blade.
Further, when the repair of the putty layer is carried out on the region needing to be repaired on the fan blade, the method comprises the following steps:
after the fan blade is horizontally placed, uniformly scraping putty onto a repair area from the blade root of the fan blade to the blade tip direction, along the chord direction and from the lower side to the higher side by using a glass fiber reinforced plastic scraper, and making a molded line of the front edge of the fan blade by using a plastic scraper; and scraping putty for a plurality of times to repair the uneven transition area of the molded surface of the fan blade, and scraping the putty for one time after each time of curing and polishing the putty layer.
Further, it is right when the putty layer is repaired to need repair the region on the fan blade, still include right putty layer 1 carries out the surface dryness detection, and it includes: and manually polishing the putty layer by using 180-mesh disc abrasive paper, and polishing the putty layer by dust generated in the putty layer.
Furthermore, it is right when the putty layer is repaired to need repair the region on the fan blade, if pinhole region appears in the putty layer surface, still need right the pinhole region carries out putty repair, and repair putty on the pinhole region solidifies the back, polishes pinhole putty surface whole once, guarantees that the putty layer does not have the mar and with profile smooth transition on every side.
Further, before the primer is coated on the fan blade, the method further comprises the following steps: and firstly coating a primer on the front edge of the fan blade, and then coating the primer on the surface and the front edge of the whole fan blade again to ensure that the primer covers the surface of the fan blade and the putty layer.
According to the fan blade coating and the preparation method thereof, the putty layer, the primer layer, the intermediate paint layer and the finish paint layer are sequentially coated on the fan blade, so that the finish paint is coatedThe layer is attached on the fan blade and then the nanometer TiO is put in2The modified fluorocarbon coating can be used as a finish paint for a finish paint layer, and the surface wear resistance of the fan blade can be improved, so that the protection grade of the fan blade is improved, the maintenance cost of the blade is reduced, and the reliability of a blade product is improved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of a fan blade coating in accordance with an exemplary embodiment of the present invention.
In the figure:
1-putty layer, 2-primer layer, 3-intermediate paint layer, 4 finish paint layer and 5-repair area.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the preferred embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
The invention provides a fan blade coating, which is shown in figure 1 and comprises a putty layer 1, a primer layer 2, an intermediate paint layer 3 and a finish paint layer 4, wherein the putty layer 1 is coated on a region 5 of a fan blade to be repaired; the primer layer 2 is coated outside the fan blade and the putty layer 1; the intermediate paint layer 3 is coated outside the primer layer 2; the surface paint layer 4 is coated outside the intermediate paint layer 3, and the surface paint layer 4 is made of nano TiO2The thickness of the surface paint layer 4 is 50-70 um, wherein, the nano TiO is2The mass content in the fluorocarbon coating is 1-5%.
As the fluorocarbon coating has more superiority than the coating used in the wind power industry, such as polyurethane coating, the fluorocarbon coating has the advantages of higher weather resistance, corrosion resistance, good adhesive force and the like, and the service life of a paint film is also higher and can reach more than 10 protective years. Through the nano TiO2The modified fluorocarbon coating has the following advantages of self-cleaning property, antibacterial property and photocatalysis:
self-cleaning property: nano TiO 22The antifouling mainly prevents the accumulation of organic matters on the surface of the paint, and the action mechanism is the decomposition of the organic matters, namely the nano TiO under the illumination2Organic matters accumulated on the surface of the paint are continuously decomposed, so that dust adsorbed on the surface of the paint is lost and an interlayer 'organic adhesive' between the paint is removed easily; and secondly, the paint is super-hydrophilic, a water film is generated on the surface of the paint, oily pollutants are isolated from the surface, and the oily pollutants are not easy to accumulate on the surface.
And (3) antibacterial property: nano TiO 22Has the functions of antibiosis, rust prevention, foreign odor decomposition, antifouling and the like, can kill attached bacteria by sunlight or indoor light irradiation, and easily washes away dirt after oxidative decomposition. Nano TiO 22Has strong bactericidal power to pseudomonas aeruginosa, escherichia coli, staphylococcus aureus and the like.
Photocatalytic performance: using nano TiO2The photocatalytic reaction can decompose the organic pollutants adsorbed on the surface of the titanium dioxide into CO2And O2Same as the restThe inorganic matters can be washed clean by rainwater, so that the self-cleaning function is realized. Inorganic substances in TiO2The surface also has optical activity, nano TiO2Has super-hydrophilicity and super-permanence under illumination, so that it has an antifogging function.
Thus, by mixing nano TiO2The modified fluorocarbon coating can be used as the finish paint for the finish paint layer 4, so that the surface wear resistance of the fan blade can be improved, the protection grade of the fan blade is improved, the maintenance cost of the blade is reduced, and the reliability of a blade product is improved.
As a preferred embodiment, the putty used in the putty layer 1 is one of polyurethane putty and epoxy system putty.
In a preferred embodiment, the primer used in the primer layer 2 is one of epoxy zinc-rich primer, epoxy zinc phosphate primer, and fluorocarbon primer.
In a preferred embodiment, the intermediate paint used in the intermediate paint layer 3 is one of epoxy mica iron intermediate paint, epoxy intermediate paint, polyurethane intermediate paint and fluorocarbon intermediate paint.
As a preferred embodiment, the nano TiO2Is one or the mixture of anatase type nano titanium dioxide and rutile type nano titanium dioxide.
The invention also provides a preparation method of the fan blade coating, which comprises the following steps:
(1) cleaning and polishing the surface of the fan blade, specifically, polishing the glass fiber reinforced plastic burrs at the blade root, the front edge and the rear edge to form smooth transition with the surrounding fan blade, and then uniformly polishing the surface of the fan blade;
(2) repairing a putty layer 1 on a region 5 needing to be repaired on the fan blade, and enabling the putty layer 1 to be in smooth transition with the surface of the fan blade around;
(3) covering the surface of the fan blade and the putty layer 1 with primer so as to form a primer layer 2 on the fan blade;
(4) coating intermediate paint on the front edge of the fan blade, and then coating the surface and the front edge of the whole fan blade with the intermediate paint again to form an intermediate paint layer 3 on the fan blade;
(5) the front edge of the fan blade is coated with finish paint, and then the surface and the front edge of the whole fan blade are coated with finish paint again, so that a finish paint layer 4 with the thickness of 50-70 microns is formed on the fan blade.
In a preferred embodiment, when repairing the putty layer 1 in the repair area 5 of the fan blade, the method comprises the following steps:
after the fan blade is horizontally placed, uniformly scraping putty onto a repair area 5 from the blade root of the fan blade to the blade tip direction, along the chord direction and from the lower side to the higher side by using a glass fiber reinforced plastic scraper, and making a molded line of the front edge of the fan blade by using a plastic scraper; and for the uneven transition area of the profile of the fan blade, putty can be scraped and coated for multiple times for modification, and after the putty layer 1 is cured and polished every time, the putty is scraped and coated for the next time.
Further, when need repair regional 5 and carry out putty layer 1 to repairing on the fan blade, still include to carry out the surface dryness detection to putty layer 1, it includes: and manually polishing the putty layer 1 by using 180-mesh disc abrasive paper, and polishing the putty layer 1 by dust generated in the putty layer 1.
When a putty layer 1 is repaired on a region 5 to be repaired on a fan blade, if a pinhole region appears on the surface of the putty layer 1, putty repairing needs to be carried out on the pinhole region, and after the repairing putty on the pinhole region is cured, the surface of the pinhole putty is integrally polished once, so that the putty layer 1 is ensured to have no scratch and to be in smooth transition with the surrounding molded surface.
As a preferred embodiment, before the primer is applied to the fan blade, the method further comprises: the primer is coated on the front edge of the fan blade, and then the primer is coated on the surface and the front edge of the whole fan blade again, so that the primer layer 2 covers the surface of the fan blade and the putty layer 1.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (10)

1. A fan blade coating, comprising:
the putty layer (1) is coated on a region (5) of the fan blade to be repaired;
the primer layer (2) is coated outside the fan blade and the putty layer (1);
the intermediate paint layer (3) is coated outside the primer layer (2);
a surface paint layer (4) coated outside the intermediate paint layer (3), wherein the surface paint layer (4) is made of nano TiO2The modified fluorocarbon coating is formed by coating, the thickness of the finish paint layer (4) is 50-70 um, wherein, the nano TiO is2The mass content in the fluorocarbon coating is 1-5%.
2. The fan blade coating of claim 1, wherein the putty layer (1) is one of a polyurethane putty and an epoxy putty.
3. The fan blade coating according to claim 1, wherein the primer used for the primer layer (2) is one of an epoxy zinc rich primer, an epoxy zinc phosphate primer, and a fluorocarbon primer.
4. The fan blade coating according to claim 1, wherein the intermediate paint layer (3) is one of epoxy mica iron intermediate paint, epoxy primer surfacer, polyurethane intermediate paint and fluorocarbon primer surfacer.
5. The fan blade coating of claim 1, wherein the nano TiO is2Is one or the mixture of anatase type nano titanium dioxide and rutile type nano titanium dioxide.
6. A preparation method of a fan blade coating is characterized by comprising the following steps:
(1) cleaning and polishing the surface of the fan blade;
(2) repairing a putty layer (1) on a region (5) needing to be repaired on the fan blade, and enabling the putty layer (1) to be in smooth transition with the surface of the fan blade around;
(3) covering the surface of the fan blade and the putty layer (1) with primer so as to form a primer layer (2) on the fan blade;
(4) coating intermediate paint on the front edge of the fan blade, and then coating the whole surface and the front edge of the fan blade with the intermediate paint again to form an intermediate paint layer (3) on the fan blade;
(5) and firstly coating finish paint on the front edge of the fan blade, and then coating finish paint on the surface and the front edge of the whole fan blade again to form a finish paint layer (4) with the thickness of 50-70 um on the fan blade.
7. The preparation method of the fan blade coating according to claim 6, wherein when repairing the putty layer (1) on the area (5) needing repair on the fan blade, the method comprises the following steps:
after the fan blade is horizontally placed, uniformly scraping putty onto a repair area (5) from the blade root of the fan blade to the blade tip direction, along the chord direction and from the lower side to the higher side by using a glass fiber reinforced plastic scraper, and making the molded line of the front edge of the fan blade by using a plastic scraper; and for the uneven transition area of the profile of the fan blade, putty can be scraped for multiple times for modification, and after the putty layer (1) is cured and polished for each time, the putty is scraped for the next time.
8. The preparation method of the fan blade coating according to claim 7, further comprising performing surface drying detection on the putty layer (1) when repairing the putty layer (1) on the area (5) needing repairing on the fan blade, wherein the method comprises the following steps: the putty layer (1) is manually ground by using 180-mesh disc sand paper, and dust appears on the putty layer (1) so that the putty layer can be ground.
9. The preparation method of the fan blade coating according to claim 7, wherein when repairing the putty layer (1) on the area (5) to be repaired on the fan blade, if a pinhole area appears on the surface of the putty layer (1), the pinhole area is also repaired by putty, and after the repairing putty on the pinhole area is cured, the surface of the pinhole putty is integrally polished, so that the putty layer (1) is ensured to have no scratch and to be in smooth transition with the surrounding molded surface.
10. The method for preparing a fan blade coating according to claim 6, further comprising, before applying the primer to the fan blade: and firstly coating a primer on the front edge of the fan blade, and then coating the primer on the whole surface and the front edge of the fan blade again to ensure that the primer layer (2) covers the surface of the fan blade and the putty layer (1).
CN202011285464.3A 2020-11-17 2020-11-17 Fan blade coating and preparation method thereof Pending CN112452684A (en)

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CN202011285464.3A CN112452684A (en) 2020-11-17 2020-11-17 Fan blade coating and preparation method thereof

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