CN116733693A - Microwave radiation deicing method for fan blade - Google Patents
Microwave radiation deicing method for fan blade Download PDFInfo
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- CN116733693A CN116733693A CN202310730411.5A CN202310730411A CN116733693A CN 116733693 A CN116733693 A CN 116733693A CN 202310730411 A CN202310730411 A CN 202310730411A CN 116733693 A CN116733693 A CN 116733693A
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- microwave
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- silicon carbide
- deicing
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- 230000005855 radiation Effects 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000000576 coating method Methods 0.000 claims abstract description 101
- 239000011248 coating agent Substances 0.000 claims abstract description 91
- 239000002131 composite material Substances 0.000 claims abstract description 76
- 239000004814 polyurethane Substances 0.000 claims abstract description 71
- 229920002635 polyurethane Polymers 0.000 claims abstract description 71
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 56
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 54
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 51
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 47
- 239000010439 graphite Substances 0.000 claims abstract description 47
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 230000003075 superhydrophobic effect Effects 0.000 claims abstract description 19
- 238000013461 design Methods 0.000 claims abstract description 6
- 238000010248 power generation Methods 0.000 claims abstract description 6
- 239000003973 paint Substances 0.000 claims description 14
- 238000002360 preparation method Methods 0.000 claims description 14
- 238000005507 spraying Methods 0.000 claims description 14
- 230000001276 controlling effect Effects 0.000 claims description 11
- 239000000945 filler Substances 0.000 claims description 11
- 230000004048 modification Effects 0.000 claims description 10
- 238000012986 modification Methods 0.000 claims description 10
- 229910021389 graphene Inorganic materials 0.000 claims description 9
- 239000002135 nanosheet Substances 0.000 claims description 9
- 239000011527 polyurethane coating Substances 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 8
- 238000001027 hydrothermal synthesis Methods 0.000 claims description 6
- 230000003647 oxidation Effects 0.000 claims description 6
- 238000007254 oxidation reaction Methods 0.000 claims description 6
- 238000002464 physical blending Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 4
- 125000000217 alkyl group Chemical group 0.000 claims description 3
- 238000007112 amidation reaction Methods 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 230000007547 defect Effects 0.000 claims description 3
- 125000000524 functional group Chemical group 0.000 claims description 3
- 125000001165 hydrophobic group Chemical group 0.000 claims description 3
- 238000011068 loading method Methods 0.000 claims description 3
- 230000033116 oxidation-reduction process Effects 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 3
- 238000002407 reforming Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims 2
- 238000000605 extraction Methods 0.000 claims 1
- 230000002194 synthesizing effect Effects 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 5
- 230000009466 transformation Effects 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 230000002209 hydrophobic effect Effects 0.000 abstract description 2
- 230000001680 brushing effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000013021 overheating Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000002064 nanoplatelet Substances 0.000 description 1
- 238000011160 research Methods 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
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
- F03D80/40—Ice detection; De-icing means
-
- 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
- F03D80/60—Cooling or heating of wind motors
-
- 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
Abstract
The invention relates to the field of wind power generation, in particular to a microwave radiation deicing method for a fan blade. The invention realizes the microwave deicing technology of the fan blade. The super-hydrophobic silicon carbide/polyurethane composite coating ensures the hydrophobic performance of the surface of the blade, the self-power supply of the microwave heating system is ensured by the transformation of the power supply circuit, the directional radiation of microwave energy is realized by the design of the microwave heating system and the arrangement of the radiation antenna, and the silicon carbide/graphite/polyurethane composite wave-absorbing coating absorbs the microwave energy and converts the microwave energy into heat energy, so that the efficient deicing of the blade is realized. Compared with the traditional deicing method, the deicing device has the advantages that the microwave heating source is adopted, and the energy consumption is lower. High efficiency: the microwave energy can rapidly melt ice and snow on the surface of the blade, so that new ice and snow can be prevented from forming, and the wind energy conversion efficiency is improved. Flexible adaptability: the invention is suitable for wind power blades with different lengths and shapes, and has higher flexibility and adaptability by optimally designing the number and the arrangement positions of the radiation antennas.
Description
Technical Field
The invention relates to the field of wind power generation, in particular to a microwave radiation deicing method for a fan blade.
Background
Wind energy is widely used and developed as a clean renewable energy source. However, in cold climates, wind blades are susceptible to icing phenomena, leading to reduced wind energy conversion efficiency, unstable operation and increased risk of equipment damage. Therefore, wind turbine blade de-icing technology is a focus of research and attention in order to improve the reliability and economy of wind farms.
At present, common wind power blade deicing methods comprise mechanical deicing, heating deicing, chemical deicing and the like. However, conventional mechanical deicing requires additional equipment and manual operations, is costly and inefficient. The heating deicing method mainly adopts electric heating or heating medium for heating, but has the problems of high energy consumption and complex operation. Chemical deicing requires the use of chemicals that pollute the environment.
In order to overcome the limitations of the traditional deicing method, microwave radiation deicing technology has been developed. Microwave radiation deicing utilizes microwave energy to heat the blade surface, rapidly melting ice and snow and preventing new ice and snow formation by absorbing the microwave energy. Compared with the traditional method, the microwave radiation deicing has the advantages of low energy consumption, high efficiency, environmental protection and the like.
However, the currently existing microwave radiation deicing technology still faces some challenges. The problems of reasonably distributing a microwave heating source, designing an effective radiation antenna, controlling microwave power and the like are to be solved. Therefore, the invention provides a wind power blade microwave radiation deicing system and a wind power blade microwave radiation deicing method, and the deicing effect of the wind power blade with high efficiency and low energy consumption is realized by reasonably designing a microwave heating source and an antenna.
Disclosure of Invention
In order to solve the problems, the invention provides a microwave deicing method applied to fan blades.
The technical scheme of the invention is as follows:
a fan blade microwave radiation deicing method comprises the following steps:
firstly, preparing silicon carbide/polyurethane composite wave-absorbing coating or graphite/polyurethane composite wave-absorbing coating
Polyurethane is used as a main paint, silicon carbide or graphite is used as a wave-absorbing filler, and the high-efficiency wave-absorbing paint suitable for deicing the surface of the wind power blade is prepared.
(1) Preparation of silicon carbide/polyurethane composite wave-absorbing paint
Silicon carbide is selected as a wave-absorbing filler, silicon carbide powder is used as the wave-absorbing filler and added into polyurethane coating, and silicon carbide/polyurethane composite coatings with different appearances are prepared; silicon carbide and polyurethane are mixed to prepare silicon carbide/polyurethane composite coatings with different loading amounts.
(2) Preparation of graphite/polyurethane composite wave-absorbing paint
Firstly, regulating and controlling microscopic defects and oxygen-containing functional groups on the surface of graphite by adopting an oxidation-reduction method, and adding graphite with different oxidation degrees into polyurethane coating by adopting a physical blending method to prepare graphite/polyurethane composite coating with different oxidation degrees; graphite with different sheet diameter thicknesses is prepared by a hydrothermal method/an ultrasonic cleaning method, and is added into a polyurethane coating to prepare the graphite/polyurethane composite wave-absorbing coating.
Secondly, preparing the super-hydrophobic silicon carbide/polyurethane composite wave-absorbing coating or graphite/polyurethane composite wave-absorbing coating
(1) Preparation of super-hydrophobic silicon carbide/polyurethane composite wave-absorbing coating
Chemical grafting modification is carried out on the silicon carbide particles by a hydrothermal method to enable hydrophobic groups to exist on the surface of the silicon carbide; the modified filler is mixed with the resin by a physical blending method, and then the coating is sprayed on the surface of the blade by spraying.
(2) Preparation of super-hydrophobic graphite/polyurethane composite wave-absorbing coating
First, graphite oxide/graphene oxide nanoplatelets were synthesized using a modified Hummers method. Then, preparing the super-hydrophobic nano-sheet on the surface of the nano-sheet by utilizing amidation reaction grafted alkyl chain modification, realizing different modification degrees by controlling reaction time, and then spraying the coating on the surface of the blade by spraying.
Thirdly, designing a microwave deicing system, including modifying a power supply line, designing a microwave heating system and arranging a radiation antenna:
3.1, reforming a power supply line to supply power for the microwave heating system: according to the total power of the microwave source to be installed, a self-power-consumption power supply system of the wind turbine is expanded, and a box-type transformer, a tower foundation cabinet, a main control cabinet and the like are adjusted as required; and a conductive slip ring and an electric brush are added, one side of the electric brush is contacted with the conductive slip ring, and the other side of the electric brush is electrically connected with a microwave generator in the corresponding blade. The microwave power supply circuit is transformed by the mode.
3.2 microwave heating system design: and n (n > =1) adjustable high-power microwave sources are configured, the energy of the high-power microwave sources is input into a power distributor after being coaxially converted by a waveguide, and is uniformly distributed to the input ends of all radio frequency switches, and then the operation of the antenna is realized by controlling the switch to be turned on and off.
3.3 radiating antenna arrangement: and (3) leading out m (m > =1) adjustable high-power antennas from n microwave sources, and setting different antenna spacing and arrangement positions to realize directional radiation of microwaves.
Fourthly, coating a composite coating: firstly, coating the prepared superhydrophobic silicon carbide/polyurethane composite coating on an easily-frozen area on the surface of a blade to ensure the hydrophobicity of the surface of the blade; and then coating the prepared silicon carbide/polyurethane composite wave-absorbing coating or graphite/polyurethane composite wave-absorbing coating to enhance the absorption and heat conduction of microwave energy and realize the rapid deicing effect. The coating area should be matched to the directional radiating area of the antenna radiation.
Fifthly, microwave deicing operation:
5.1 in case deicing is required, the microwave source is started and the appropriate power and irradiation time are set. Setting the power of each microwave source and adjusting the radiation time according to the actual requirement.
5.2 microwave energy generated by a microwave source is directed to radiate via an antenna to a composite paint application area.
5.3 the silicon carbide/polyurethane composite wave-absorbing coating or the graphite/polyurethane composite wave-absorbing coating absorbs the microwave energy and converts it into heat energy.
5.4 thermal energy is conducted inside the composite material, raising the blade surface temperature, thereby rapidly melting and removing ice.
And 5.5, stopping the operation of the microwave source after deicing is completed, and recovering normal wind power generation operation.
Further, the specific operation of the step 4 is as follows:
and 4.1, coating the prepared superhydrophobic silicon carbide/polyurethane composite coating on a key icing area on the surface of the blade, namely, coating the blade tip at a position which is 2/3 of the position of the blade close to the blade tip. The coating area should be matched to the directional radiating area of the antenna radiation.
And 4.2, coating the prepared silicon carbide/polyurethane composite wave-absorbing coating or graphite/polyurethane composite wave-absorbing coating on the spraying part in the step 4.1.
4.3 ensuring that the coating covers the blade surface uniformly during the coating process and avoiding dripping or wrinkling of the coating as much as possible.
Further, the radiating antennas are arranged at the blade root and at 40% of the blade. Microwave energy is received and directionally transmitted through the high-power cable.
The invention realizes the microwave deicing technology of the fan blade. The super-hydrophobic silicon carbide/polyurethane composite coating ensures the hydrophobic performance of the surface of the blade, the self-power supply of the microwave heating system is ensured by the transformation of the power supply circuit, the directional radiation of microwave energy is realized by the design of the microwave heating system and the arrangement of the radiation antenna, and the silicon carbide/graphite/polyurethane composite wave-absorbing coating absorbs the microwave energy and converts the microwave energy into heat energy, so that the efficient deicing of the blade is realized.
Advantages of the present invention include, but are not limited to:
1. the energy consumption is low: compared with the traditional deicing method, the deicing device adopts a microwave heating source, and has lower energy consumption.
2. High efficiency: the microwave energy can rapidly melt ice and snow on the surface of the blade, so that new ice and snow can be prevented from forming, and the wind energy conversion efficiency is improved.
3. Flexible adaptability: the invention is suitable for wind power blades with different lengths and shapes, and has higher flexibility and adaptability by optimally designing the number and the arrangement positions of the radiation antennas.
4. Safety and reliability: by controlling the microwave power and the heating time, the surface temperature of the blade is ensured to be in a reasonable range, overheating and damage are avoided, and the safe operation of the wind power blade is ensured.
Drawings
FIG. 1 is a schematic flow diagram of microwave deicing of a wind turbine blade;
FIG. 2 is a schematic diagram of a microwave power line retrofit;
FIG. 3 is a schematic diagram of a microwave heating system;
fig. 4 is a schematic diagram of a radiating antenna arrangement.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, techniques and advantages of the present invention more apparent.
Taking a long fan blade with the length of 40m as an example, the following specific implementation process is as follows:
1. preparation of silicon carbide/polyurethane composite wave-absorbing coating or graphite/polyurethane composite wave-absorbing coating
(1) Preparation of silicon carbide/polyurethane composite wave-absorbing paint
Silicon carbide with the grain diameter of 200nm, 1 μm, 10 μm, 50 μm and 100 μm is selected as the wave-absorbing filler. Silicon carbide powder is used as wave-absorbing filler to be added into polyurethane coating to prepare silicon carbide/polyurethane composite coating with different appearances; 10g of polyurethane is taken in a glass bottle, and 0.25g, 0.5g, 1g, 1.5g, 2g, 3g, 3.5g, 4g and 5g of silicon carbide are respectively weighed and mixed with the polyurethane to prepare silicon carbide/polyurethane composite coatings with different loading amounts; and (3) coating the prepared silicon carbide/polyurethane composite coating on a substrate by adopting a brushing method or a spraying method, and continuously brushing after the coating is dried to prepare samples with the thickness of 0.2mm, 0.5mm, 1mm, 2mm, 3mm and 5mm respectively.
(2) Preparation of graphite/polyurethane composite wave-absorbing paint
Firstly, regulating and controlling microscopic defects and oxygen-containing functional groups on the surface of graphite by adopting an oxidation-reduction method, and adding graphite/graphene with different oxidation degrees into polyurethane coating by adopting a physical blending method to prepare graphite/polyurethane composite coating with different oxidation degrees; preparing graphite/graphene with different sheet diameter thicknesses by a hydrothermal method/ultrasonic cleaning method, and adding the graphite/graphene into a polyurethane coating to prepare a graphite/graphene/polyurethane composite wave-absorbing coating; and (3) coating the prepared graphite/polyurethane composite coating on a substrate by adopting a brushing method or a spraying method, and continuously brushing after the coating is dried to prepare samples with the thickness of 0.2mm, 0.5mm, 1mm, 2mm, 3mm and 5mm respectively.
2. Preparation of super-hydrophobic silicon carbide/polyurethane composite wave-absorbing coating or graphite/polyurethane composite wave-absorbing coating
(1) Preparation of super-hydrophobic silicon carbide/polyurethane composite wave-absorbing coating
Chemical grafting modification is carried out on the silicon carbide particles by a hydrothermal method, so that hydrophobic groups exist on the surface of the silicon carbide; the modified filler is mixed with the resin using a physical blending method. The coatings were sprayed onto the blade surfaces by spraying to produce 0.2mm, 0.5mm, 1mm, 2mm, 3mm and 5mm thick samples, respectively.
(2) Preparation of super-hydrophobic graphite/graphene/polyurethane composite wave-absorbing coating
The modified Hummers method is utilized to synthesize the graphite oxide/graphene oxide nano-sheets. Then, preparing the super-hydrophobic nano-sheet on the surface of the nano-sheet by utilizing amidation reaction grafted alkyl chain modification, and realizing different modification degrees by controlling the reaction time to characterize and evaluate chemical structures, chemical properties, element contents and microscopic morphologies of the graphite/graphene nano-sheet with different modification degrees. The coatings were sprayed onto the blade surfaces by spraying to produce 0.2mm, 0.5mm, 1mm, 2mm, 3mm and 5mm thick samples, respectively.
3. Design microwave deicing system
3.1, reforming a power supply line to supply power for a microwave source: adjusting a box-type transformer, a tower foundation cabinet, a main control cabinet and the like, outputting 690V, and carrying out grid connection through a box transformer to finish power supply transformation; adding a conductive slip ring, connecting the conductive slip ring to a cabin of the wind turbine, fixing the conductive slip ring, and enabling the center axis of the conductive slip ring to coincide with the center axis of a hub of the wind turbine; the brushes are added, fixed on the hubs at intervals, correspond to the blades one by one and rotate along with the blades of the wind turbine and the hubs; one side of the electric brush is contacted with the conductive slip ring, and the other side of the electric brush is electrically connected with the microwave generator in the corresponding blade. As particularly shown in fig. 2.
3.2 microwave heating system design: 3 high-power microwave sources with the frequency of 2.5GHz are configured, the energy of the high-power microwave sources is input into a power distributor after being coaxially converted by a waveguide, and is uniformly distributed to the input ends of all radio frequency switches, and then the operation of the antenna is realized by controlling the switch to be turned on and off. As particularly shown in fig. 3.
3.3 arranging high-power radiation antennas in the blade cavity, wherein the number of the high-power radiation antennas is 6, and observing the icing area of the blade can ensure that the windward side is easier to freeze and the leeward side is slightly frozen. From the blade icing zone, the position of the radiating antenna arrangement can be determined: arranged at the blade root and at the 40% position of the blade. Microwave energy is received and directionally transmitted through the high-power cable. As shown in particular in fig. 4.
4. Composite coating application
And 4.1, coating the prepared superhydrophobic silicon carbide/polyurethane composite coating on a key icing area on the surface of the blade, namely, coating the blade tip at a position which is 2/3 of the position of the blade close to the blade tip. The coating area should be matched to the directional radiating area of the antenna radiation.
And 4.2, coating the prepared silicon carbide/polyurethane composite wave-absorbing coating or graphite/polyurethane composite wave-absorbing coating on the spraying part in the step 4.1.
4.3 ensuring that the coating covers the blade surface uniformly during the coating process and avoiding dripping or wrinkling of the coating as much as possible.
5. Microwave deicing operation
5.1 in case deicing is required, the microwave source is started and the appropriate power and irradiation time are set. The power of each microwave source can be set to 6kW according to specific conditions, and the radiation time can be adjusted according to actual requirements.
5.2 microwave energy generated by a microwave source is directed to radiate via an antenna to a composite paint application area.
5.3 the silicon carbide/polyurethane composite wave-absorbing coating or the graphite/polyurethane composite wave-absorbing coating absorbs the microwave energy and converts it into heat energy.
5.4 thermal energy is conducted inside the composite material, raising the blade surface temperature, thereby rapidly melting and removing ice.
And 5.5, stopping the operation of the microwave source after deicing is completed, and recovering normal wind power generation operation.
The microwave deicing method for the wind power blade can be widely applied to wind power plants, and effectively solves the problem of icing of the wind power blade under cold climate conditions. The self-power supply of the microwave heating system can be realized through the transformation of the power supply circuit. Through reasonable layout of the microwave heating system and the radiation antenna in the inner cavity of the blade, microwave energy can fully cover the surface of the blade, and comprehensive anti-icing and deicing effects are realized. In addition, through microwave power control and heating time adjustment, the blade surface temperature can be ensured to be in a safe range, and overheating and damage are avoided.
Claims (5)
1. A fan blade microwave radiation deicing method is characterized by comprising the following steps:
firstly, preparing silicon carbide/polyurethane composite wave-absorbing coating or graphite/polyurethane composite wave-absorbing coating
Polyurethane is used as main paint, silicon carbide or graphite is used as wave-absorbing filler, and high-efficiency wave-absorbing paint suitable for deicing the surface of a wind power blade is prepared;
(1) Preparation of silicon carbide/polyurethane composite wave-absorbing paint
Silicon carbide is selected as a wave-absorbing filler, silicon carbide powder is used as the wave-absorbing filler and added into polyurethane coating, and silicon carbide/polyurethane composite coatings with different appearances are prepared; mixing silicon carbide with polyurethane to prepare silicon carbide/polyurethane composite coatings with different loading amounts;
(2) Preparation of graphite/polyurethane composite wave-absorbing paint
Firstly, regulating and controlling microscopic defects and oxygen-containing functional groups on the surface of graphite by adopting an oxidation-reduction method, and adding graphite with different oxidation degrees into polyurethane coating by adopting a physical blending method to prepare graphite/polyurethane composite coating with different oxidation degrees; preparing graphite with different sheet diameter thicknesses by a hydrothermal method/an ultrasonic cleaning method, and adding the graphite into a polyurethane coating to prepare a graphite/polyurethane composite wave-absorbing coating;
secondly, preparing the super-hydrophobic silicon carbide/polyurethane composite wave-absorbing coating or graphite/polyurethane composite wave-absorbing coating
(1) Preparation of super-hydrophobic silicon carbide/polyurethane composite wave-absorbing coating
Chemical grafting modification is carried out on the silicon carbide particles by a hydrothermal method to enable hydrophobic groups to exist on the surface of the silicon carbide; mixing the modified filler and the resin by using a physical blending method, and then spraying the coating on the surface of the blade by spraying;
(2) Preparation of super-hydrophobic graphite/polyurethane composite wave-absorbing coating
Firstly, synthesizing graphite oxide/graphene oxide nano sheets by utilizing a modified Hummers method; then, preparing the super-hydrophobic nano-sheet on the surface of the nano-sheet by utilizing amidation reaction grafted alkyl chain modification, realizing different modification degrees by controlling reaction time, and then spraying the coating on the surface of the blade by spraying;
thirdly, designing a microwave deicing system, including modifying a power supply line, designing a microwave heating system and arranging a radiation antenna:
3.1, reforming a power supply line to supply power for the microwave heating system: according to the total power of the microwave source to be installed, a self-power-consumption power supply system of the wind turbine is expanded, and the box-type transformer, the tower foundation cabinet and the main control cabinet are adjusted as required; a conductive slip ring and an electric brush are added, one side of the electric brush is contacted with the conductive slip ring, and the other side of the electric brush is electrically connected with a microwave generator in the corresponding blade;
3.2 microwave heating system design: configuring n (n > =1) adjustable high-power microwave sources, coaxially converting the energy of the high-power microwave sources through a waveguide, inputting the energy into a power distributor, uniformly distributing the energy to the input ends of all radio frequency switches, and then controlling the switches to be turned on and off to realize the operation of the antenna;
3.3 radiating antenna arrangement: m (m > =1) adjustable high-power antennas are led out from n microwave sources, different antenna spacing and arrangement positions are set, and directional radiation of microwaves is realized;
fourthly, coating a composite coating: firstly, coating the prepared superhydrophobic silicon carbide/polyurethane composite coating on an easily-frozen area on the surface of a blade to ensure the hydrophobicity of the surface of the blade; then coating the prepared silicon carbide/polyurethane composite wave-absorbing coating or graphite/polyurethane composite wave-absorbing coating to enhance the absorption and heat conduction of microwave energy and realize the rapid deicing effect; the coating area is matched with the directional radiation area of the antenna radiation;
and fifthly, starting microwave deicing operation.
2. A method for deicing fan blades by microwave radiation as set forth in claim 1, wherein said fourth step comprises the specific operations of:
4.1, coating the prepared superhydrophobic silicon carbide/polyurethane composite coating on a key icing area on the surface of the blade, namely, coating the blade at the position 2/3 of the blade near the blade tip in a thick way; the coating area is matched with the directional radiation area of the antenna radiation;
4.2, coating the prepared silicon carbide/polyurethane composite wave-absorbing coating or graphite/polyurethane composite wave-absorbing coating on the spraying part in the step 4.1;
4.3 ensuring that the coating covers the blade surface uniformly during the coating process and avoiding dripping or wrinkling of the coating as much as possible.
3. A method of deicing fan blade by microwave radiation as claimed in claim 1 or 2, wherein in step 3.3, said radiating antenna is arranged at the blade root and 40% of the blade, and receives and directs microwave energy via high power cable extraction.
4. A method for deicing fan blades by microwave radiation as claimed in claim 1 or 2, wherein said fifth step comprises the following steps:
5.1, under the condition that deicing is needed, starting a microwave source and setting proper power and radiation time; setting the power of each microwave source and adjusting the radiation time according to actual requirements;
5.2 microwave energy generated by the microwave source is directed radiated via the antenna to the composite paint application area;
5.3 the silicon carbide/polyurethane composite wave-absorbing coating or the graphite/polyurethane composite wave-absorbing coating absorbs the microwave energy and converts the microwave energy into heat energy;
5.4, heat energy is conducted inside the composite material, so that the surface temperature of the blade is increased, and therefore, the blade is rapidly melted and icing is removed;
and 5.5, stopping the operation of the microwave source after deicing is completed, and recovering normal wind power generation operation.
5. A method of deicing fan blade by microwave radiation as set forth in claim 3, wherein said fifth step comprises the specific operations of:
5.1, under the condition that deicing is needed, starting a microwave source and setting proper power and radiation time; setting the power of each microwave source and adjusting the radiation time according to actual requirements;
5.2 microwave energy generated by the microwave source is directed radiated via the antenna to the composite paint application area;
5.3 the silicon carbide/polyurethane composite wave-absorbing coating or the graphite/polyurethane composite wave-absorbing coating absorbs the microwave energy and converts the microwave energy into heat energy;
5.4, heat energy is conducted inside the composite material, so that the surface temperature of the blade is increased, and therefore, the blade is rapidly melted and icing is removed;
and 5.5, stopping the operation of the microwave source after deicing is completed, and recovering normal wind power generation operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310730411.5A CN116733693A (en) | 2023-06-20 | 2023-06-20 | Microwave radiation deicing method for fan blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310730411.5A CN116733693A (en) | 2023-06-20 | 2023-06-20 | Microwave radiation deicing method for fan blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116733693A true CN116733693A (en) | 2023-09-12 |
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|---|---|---|---|
| CN202310730411.5A Pending CN116733693A (en) | 2023-06-20 | 2023-06-20 | Microwave radiation deicing method for fan blade |
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| Country | Link |
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2023
- 2023-06-20 CN CN202310730411.5A patent/CN116733693A/en active Pending
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