CN103612460B - A kind of head leading edge assemblies - Google Patents
A kind of head leading edge assemblies Download PDFInfo
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- CN103612460B CN103612460B CN201310515916.6A CN201310515916A CN103612460B CN 103612460 B CN103612460 B CN 103612460B CN 201310515916 A CN201310515916 A CN 201310515916A CN 103612460 B CN103612460 B CN 103612460B
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Abstract
A kind of head leading edge assemblies, including head leading edge housing and the ice-phobic coating being positioned at hull outside, this ice-phobic coating includes priming paint and finish paint, and described priming paint is epoxy acrylic aqueous priming paint, finish paint is organic silicone modified acrylate coating material；The build of priming paint and finish paint respectively 26 microns and 47 microns；Described organic silicone modified acrylate coating material includes: by weight, organosilicon modified crylic acid resin 55-65%, color filters 20-25%, nano aluminium oxide 3%, nano magnesia 3%, levelling agent 1%, defoamer 0.8%, dispersant 1.2%, catalyst 0.5%, solvent 3-5%.Head leading edge assemblies according to the present invention can effectively reduce the formation on ice sheet edge before the handpiece, and is conducive to coming off of the ice sheet formed.
Description
Technical field
The present invention relates to a kind of head leading edge assemblies.
Background technology
The world today, aircraft is increasingly becoming the vehicles of people's pay attention to day by day due to its quick, safe feature.But, when aircraft is with during less than subsonic speed flight when icing meteorology of a certain critical Mach number, the surface windward of some parts will because of the droplets impact in air, gather and freeze, for instance head leading edge.Substantial amounts of accident and research all show that even the accumulated ice of aircraft key position, a small amount of, also results in the drop in lift of aircraft, and flight resistance increases, thus causing the deterioration of the pneumatic quality such as maneuverability and stability of aircraft.Especially aero-engine is under ground and humiture certain in the air, and freezing easily occur in air inlet trousers and support plate.Will cause that inlet flow field distorts, and makes engine performance deterioration owing to freezing；Ice comes off and may also result in engine blade fracture, even results in the major accident of fatal crass.Especially large aircraft, has the features such as high thrust, big Gross Weight Takeoff, subsonic speed, strong viability (all-weather flight) such as large-scale Dakota, and this just determines this class aircraft and is inevitably present aloft ice formation issues.Therefore the research carrying out aircraft icing and guard technology thereof is that very important importance developed by aircraft, especially large transport airplane, and flight safety is significant.
Different parts for aircraft, current anti-/ de-icing method is as follows: the (1) hot gas anti-icing system of engine bleed air: be mainly used in the anti-icing of wing, empennage leading edge and engine inlets lip and air inlet component, the temperature of protection coating is made to reach the evaporating temperature of super-cooling waterdrop under ice-formation condition by the heating of steam, thus avoiding super-cooling waterdrop to freeze to freeze at frozen surface.(2) cycle gasbag-type deicing system: utilize engine bleed supply air bag pneumatic channel, so as to periodically expansion or shrinkage, destroys the adhesion of ice sheet and surface, then is issued to the purpose of deicing in the effect of aerodynamic force.Be mainly used in the deicing of wing, empennage leading edge, it is necessary to bleed little compared with hot gas anti-icing system a lot, when the supply of anti-icing steam is not enough, can icing safeguard procedures as an alternative.(3) electric heating prevents/deicing system: both sustainable heating played anti-ice action, can heat as deicing system in the cycle again.What be mainly used in propeller blade, rectification calotte and windscreen prevents/deicing.Except above-mentioned electric heating system, the electricity of low energy consumption scold deicing, Electro-Impulse De-icing and other novel anti-/ de-icing method, as ultrasound wave, marmem and high-frequency electronic deicing etc. also can as the anti-icing replacement schemes of bleed, the key technology of these schemes is still in exploitation and experimental stage, it is necessary in use verify its feasibility and reliability further.
Except the method for these active deicing above-mentioned, also the widely used method at aircraft easily icing position application low-surface-energy hydrophobic coating plays the effect of passive anti-deicing in the world at present.It is coated in the low surface energy coat of body surface except the super-cooling waterdrop condensation degree at body surface can be reduced, when aircraft is by heating actively deicing, it is also possible to make body surface ice sheet melt the water droplet formed and depart from body as early as possible, thus preventing from heavily freezing.The relatively aforementioned several method of method of this application low-surface-energy hydrophobic coating has that cost is low, it is little to consume energy, realize the features such as difficulty is low, is the anti-deicing supplementary means of a kind of critically important aircraft surfaces.But, the performance of current most of low-surface-energy hydrophobic coatings still can not fully meet the safety requirements of the anti-deicing of aircraft surfaces.
Summary of the invention
It is desirable to provide a kind of head leading edge assemblies, its base house outer layer includes organosilicon modified crylic acid resin ice-phobic coating, therefore, it is possible to effectively reduce the formation on ice sheet edge before the handpiece, and is conducive to coming off of the ice sheet formed.
Specifically, a kind of head leading edge assemblies, including head leading edge housing and the ice-phobic coating being positioned at hull outside, this ice-phobic coating includes priming paint and finish paint, and described priming paint is epoxy acrylic aqueous priming paint, finish paint is organic silicone modified acrylate coating material；The build of priming paint and finish paint respectively 26 microns and 47 microns；Described organic silicone modified acrylate coating material includes: by weight, organosilicon modified crylic acid resin 55-65%, color filters 20-25%, nano aluminium oxide 3%, nano magnesia 3%, levelling agent 1%, defoamer 0.8%, dispersant 1.2%, catalyst 0.5%, the first solvent 3-5%；Organosilicon modified crylic acid resin therein is prepared as follows: (1) prepares raw material: by weight, organic silicon monomer 24 parts, (methyl) acrylate monomer 100 parts, hydroxy acryl acid ester 45 parts, acrylonitrile 5 parts, amido silicon oil 20 parts, the second solvent 55 parts, initiator 5 parts；(2) second solvent of total second quantity of solvent 75wt% is joined in the four-hole boiling flask equipped with reflux condensing tube, thermometer, agitator and Dropping funnel, passing into nitrogen deoxygenation, put in oil bath pan, heating is to 115 DEG C, start agitator, make the second solvent refluxing；The mixed solution that the 15wt% of whole organic silicon monomers 24 parts, (methyl) acrylate monomer 100 parts, hydroxy acryl acid ester 45 parts, acrylonitrile 5 parts, amido silicon oil 20 parts, the 95wt% of initiator total amount, the second solvent total amount forms was joined evenly in four-hole boiling flask in 2 hours, after adding, continue insulation reaction 3 hours；Remaining initiator and the second solvent are joined in four-hole boiling flask, continues insulation reaction and stop for 2.5 hours, be cooled to room temperature, discharging；It is the vinyltrimethoxy silane of 5:8, tetramethyl divinyl disiloxane that organic silicon monomer includes weight ratio；
Preferably, (methyl) acrylate monomer includes weight ratio is 5:8 ethyl methacrylate, methacrylic acid.
Preferably, described hydroxy acryl acid ester monomer is the one in methacrylic acid-beta-hydroxy ethyl ester, methacrylic acid-β-hydroxypropyl acrylate, senecioate-hydroxyl ethyl ester or senecioate-hydroxypropyl acrylate；Described initiator includes main initiator and co initiator, and described main initiator is the one in azodiisobutyronitrile, benzoyl peroxide, two t-amyl peroxy compounds or di-tert-butyl peroxide；Co initiator is the one in peroxide-2-ethyl hexanoic acid tert-butyl, peroxidized t-butyl perbenzoate, two tertiary amyl peroxide.The weight ratio of main initiator and co initiator is 4:1.Described solvent is the one in ethyl acetate, butyl acetate, butanol, propylene glycol methyl ether acetate or acetone.
Preferably, for preparing organic silicone modified acrylate coating material specifically comprises the following steps that the aforementioned organic silicon adding 80% mass in a reservoir is acrylic resin modified and mixed organic solvents, and whole nano materials and dispersant；Carry out stirring at low speed (380 revs/min), mixing time about 6 minutes, stop blender；Being subsequently adding described color filters, (2500 revs/min) stir 15 minutes at a high speed；Grind, reach fineness of the particles≤8 μm；Add remaining organosilicon modified crylic acid resin and other various described auxiliary agents, and regulate viscosity with remaining described organic solvent；Stir；Filter discharging.
Preferably, the technique of spray-applied primer and organic silicone modified acrylate coating material formation ice-phobic coating is as follows:
Clean and polishing:
60 DEG C of warm water washings are adopted to remove hull outside remnants paint stripper, it is stained with solvent with clean brown shirting and slightly cleans removal dirt, water sand milling or solvent sand milling hull outside surface, it is stained with the abluent fine purifiation surface with coatings system with clean brown shirting and dries, the surface processed should be clean, pollution-free, it is ensured that 35s moisture film does not diverge continuously；
Spray-applied primer
Within 5 hours that cleaning and polishing step complete, uniformly spray one layer of epoxy acrylic aqueous priming paint in hull outside；Adopt airless spraying, pressure ratio 55:1, spray gun distance 650～720mm, jet angle 75～85 degree, spray voltage 28～30V, spraying current 220～240A, nozzle diameter: 0.38～0.46mm, ambient humidity: < 76%, hull outside surface temperature is higher than dew point more than 5 DEG C, sprays one time；
Spraying organic silicone modified acrylate coating material
Priming paint be dried to can adhesive tape but less than 72h within the scope of carry out primary coat process: gently abrade the coarse of dry spray with the sand felt being moistened with flexible solvent or water preparation, clean the dust particle of primed surface with dust-binding cloth, then use flexible solvent or ethanol isoreactivity solvent to wiping one time gently of all primary coat faces；Until its dry tack free, determine that primed surface does not have any pollution after, can application topcoating；Adopt airless spraying, pressure ratio 47:1, spray gun distance 570～610mm, nozzle diameter: 0.85～0.91mm, ambient humidity: < 75%, hull outside surface temperature: higher than dew point more than 6 DEG C, jet angle 77～88 degree, spray voltage 31～35V, spraying current 220～235A；
Maintenance, to be coated being completely dried can be come into operation.
Preferably, in uneven thickness on leading edge housing of ice-phobic coating, thinning gradually or first thickening thinning gradually more gradually backward from head front end.
The present invention also relates to a kind of method, method preparing organic silicone modified acrylate coating material preparing organosilicon modified crylic acid resin and edge assembly is formed the spray painting method of ice-phobic coating before the handpiece.
Detailed description of the invention
Head leading edge assemblies according to the present invention includes head leading edge housing and be positioned at the ice-phobic coating of hull outside, and this ice-phobic coating includes priming paint and finish paint, and described priming paint is epoxy acrylic aqueous priming paint, finish paint is organic silicone modified acrylate coating material.Preferably, the build of priming paint and finish paint respectively 26 microns and 47 microns.Preferably, in the present invention, the head leading edge of indication refers to that to be projected in the head of 1/5 scope before chord length anterior.It is highly preferred that in uneven thickness on leading edge housing of ice-phobic coating, for instance thinning gradually or first thickening thinning gradually gradually backward from head front end, so not only can improve anti-icing characteristic and simultaneously but also the impact for head aeroperformance can be reduced.
Specifically, edge hull outside forms ice-phobic coating and comprises the steps: that (1) prepares Silicone-Modified Acrylate Resin before the handpiece；(2) organic silicone modified acrylate coating material is prepared；(3) spray-applied primer and organic silicone modified acrylate coating material, maintenance forms ice-phobic coating.
Silicone-Modified Acrylate Resin preparation method is specific as follows: (1) prepares raw material: by weight, organic silicon monomer 24 parts, (methyl) acrylate monomer 100 parts, hydroxy acryl acid ester 45 parts, acrylonitrile 5 parts, amido silicon oil 20 parts, the second solvent 55 parts, initiator 5 parts；(2) second solvent of total second quantity of solvent 75wt% is joined in the four-hole boiling flask equipped with reflux condensing tube, thermometer, agitator and Dropping funnel, passing into nitrogen deoxygenation, put in oil bath pan, heating is to 115 DEG C, start agitator, make the second solvent refluxing；The mixed solution that the 15wt% of whole organic silicon monomers 24 parts, (methyl) acrylate monomer 100 parts, hydroxy acryl acid ester 45 parts, acrylonitrile 5 parts, amido silicon oil 20 parts, the 95wt% of initiator total amount, the second solvent total amount forms was joined evenly in four-hole boiling flask in 2 hours, after adding, continue insulation reaction 3 hours；Remaining initiator and the second solvent are joined in four-hole boiling flask, continues insulation reaction and stop for 2.5 hours, be cooled to room temperature, discharging.
Preferably, organic silicon monomer includes weight ratio is the vinyltrimethoxy silane of 5:8, tetramethyl divinyl disiloxane；It is 5:8 ethyl methacrylate, methacrylic acid that (methyl) acrylate monomer includes weight ratio.
Described hydroxy acryl acid ester monomer is the one in methacrylic acid-beta-hydroxy ethyl ester, methacrylic acid-β-hydroxypropyl acrylate, senecioate-hydroxyl ethyl ester or senecioate-hydroxypropyl acrylate；
Described initiator includes main initiator and co initiator, and described main initiator is the one in azodiisobutyronitrile, benzoyl peroxide, two t-amyl peroxy compounds or di-tert-butyl peroxide；Co initiator is the one in peroxide-2-ethyl hexanoic acid tert-butyl, peroxidized t-butyl perbenzoate, two tertiary amyl peroxide.The weight ratio of main initiator and co initiator is 4:1.
Described solvent is the one in ethyl acetate, butyl acetate, butanol, propylene glycol methyl ether acetate or acetone.
Prepare specifically comprising the following steps that of organic silicone modified acrylate coating material
Add that the aforementioned organic silicon of 80% mass is acrylic resin modified and mixed organic solvents in a reservoir, and whole nano materials and dispersant；Carry out stirring at low speed (380 revs/min), mixing time about 6 minutes, stop blender；Being subsequently adding described color filters, (2500 revs/min) stir 15 minutes at a high speed；Grind, reach fineness of the particles≤8 μm；Add remaining organosilicon modified crylic acid resin and other various described auxiliary agents, and regulate viscosity with remaining described organic solvent；Stir；Filter discharging.
Preferably, color filters used can be selected for multiple pigment, such as white, redness, yellow, black or blueness, wherein said Chinese white is Rutile type titanium dioxide, described redness and yellow uitramarine are azo pigment, described black pigment is middle colour carbon black, and described blue pigment is phthalein green grass or young crops series.Described levelling agent is the surfactant of esters of acrylic acid, ester fourth cellulose family and long-chain silicones class；Described catalyst is the environment-friendly type catalyst without organotin, for instance K-KAT4205 zirconium complex.Defoamer, composition is polysiloxane solution, for instance BYK-066N or BYK-141；Dispersant, composition is the high molecular weight block copolymer solution containing affine pigment group, such as BYK-161 or BYK-163；Described mixed solvent is the mixture of methyl iso-butyl ketone (MIBK), propylene glycol methyl ether acetate and butyl acetate, and mixed proportion is 1:2:3.Preferably, by weight, organosilicon modified crylic acid resin 55-65%, color filters 20-25%, nano aluminium oxide 3%, nano magnesia 3%, levelling agent 1%, defoamer 0.8%, dispersant 1.2%, catalyst 0.5%, solvent 3-5%.
The technique that spray-applied primer and organic silicone modified acrylate coating material form ice-phobic coating is as follows:
Clean and polishing:
60 DEG C of warm water washings are adopted to remove hull outside remnants paint stripper, it is stained with solvent with clean brown shirting and slightly cleans removal dirt, water sand milling or solvent sand milling hull outside surface, it is stained with the abluent fine purifiation surface with coatings system with clean brown shirting and dries, the surface processed should be clean, pollution-free, it is ensured that 35s moisture film does not diverge continuously；
Spray-applied primer
Within 5 hours that cleaning and polishing step complete, uniformly spray one layer of epoxy acrylic aqueous priming paint in hull outside；Adopt airless spraying, pressure ratio 55:1, spray gun distance 650～720mm, jet angle 75～85 degree, spray voltage 28～30V, spraying current 220～240A, nozzle diameter: 0.38～0.46mm, ambient humidity: < 76%, hull outside surface temperature is higher than dew point more than 5 DEG C, sprays one time；
Spraying organic silicone modified acrylate coating material
Priming paint be dried to can adhesive tape but less than 72h within the scope of carry out primary coat process: gently abrade the coarse of dry spray with the sand felt being moistened with flexible solvent or water preparation, clean the dust particle of primed surface with dust-binding cloth, then use flexible solvent or ethanol isoreactivity solvent to wiping one time gently of all primary coat faces；Until its dry tack free, determine that primed surface does not have any pollution after, can application topcoating；Adopt airless spraying, pressure ratio 47:1, spray gun distance 570～610mm, nozzle diameter: 0.85～0.91mm, ambient humidity: < 75%, hull outside surface temperature: higher than dew point more than 6 DEG C, jet angle 77～88 degree, spray voltage 31～35V, spraying current 220～235A；
Maintenance, to be coated being completely dried can be come into operation.
Ice-phobic coating according to the present invention has relatively low surface can, it is possible to is effectively prevented head leading edge and freezes and be conducive to established ice cube to come off.Meanwhile, this ice-phobic coating meets national standard, if GB6379, GB1725, GB1720, GB1732, GB1728 are about the requirement of coating hardness, viscosity, adhesive force, impact strength and drying time.
Present invention can be made replacement or modification according to present disclosure and the art technology grasped by those skilled in the art; but these are replaced or modification is all not regarded as a departure from present inventive concept, these are replaced or modification is all in claimed interest field.
Claims (1)
1. a head leading edge assemblies, including head leading edge housing and the ice-phobic coating being positioned at hull outside, this ice-phobic coating includes priming paint and finish paint, and described priming paint is epoxy acrylic aqueous priming paint, finish paint is organic silicone modified acrylate coating material；The build of priming paint and finish paint respectively 26 microns and 47 microns；Described organic silicone modified acrylate coating material includes: by weight, organosilicon modified crylic acid resin 55-65%, color filters 20-25%, nano aluminium oxide 3%, nano magnesia 3%, levelling agent 1%, defoamer 0.8%, dispersant 1.2%, catalyst 0.5%, the first solvent 3-5%；Organosilicon modified crylic acid resin therein is prepared as follows: (1) prepares raw material: by weight, organic silicon monomer 24 parts, (methyl) acrylate monomer 100 parts, hydroxy acryl acid ester 45 parts, acrylonitrile 5 parts, amido silicon oil 20 parts, the second solvent 55 parts, initiator 5 parts；(2) second solvent of total second quantity of solvent 75wt% is joined in the four-hole boiling flask equipped with reflux condensing tube, thermometer, agitator and Dropping funnel, passing into nitrogen deoxygenation, put in oil bath pan, heating is to 115 DEG C, start agitator, make the second solvent refluxing；The mixed solution that the 15wt% of whole organic silicon monomers 24 parts, (methyl) acrylate monomer 100 parts, hydroxy acryl acid ester 45 parts, acrylonitrile 5 parts, amido silicon oil 20 parts, the 95wt% of initiator total amount, the second solvent total amount forms was joined evenly in four-hole boiling flask in 2 hours, after adding, continue insulation reaction 3 hours；Remaining initiator and the second solvent are joined in four-hole boiling flask, continues insulation reaction and stop for 2.5 hours, be cooled to room temperature, discharging；It is the vinyltrimethoxy silane of 5:8, tetramethyl divinyl disiloxane that organic silicon monomer includes weight ratio；The technique that spray-applied primer and organic silicone modified acrylate coating material form ice-phobic coating is as follows: (1) is cleaned and polishing: adopt 60 DEG C of warm water washings to remove hull outside remnants paint stripper, it is stained with the 3rd solvent with clean brown shirting and slightly cleans removal dirt, water sand milling hull outside surface, it is stained with the abluent fine purifiation surface with coatings system with clean brown shirting and dries, the surface processed should be clean, pollution-free, it is ensured that 35s moisture film does not diverge continuously；(2) spray-applied primer: within 5 hours that cleaning and polishing step complete, uniformly spray one layer of epoxy acrylic aqueous priming paint in hull outside；Adopt airless spraying, pressure ratio 55:1, spray gun distance 650～720mm, jet angle 75～85 degree, spray voltage 28～30V, spraying current 220～240A, nozzle diameter: 0.38～0.46mm, ambient humidity: < 76%, hull outside surface temperature is higher than dew point more than 5 DEG C, sprays one time；(3) spraying organic silicone modified acrylate coating material: adopt airless spraying, pressure ratio 47:1, spray gun distance 570～610mm, nozzle diameter: 0.85～0.91mm, ambient humidity: < 75%, hull outside surface temperature: higher than dew point more than 6 DEG C, jet angle 77～88 degree, spray voltage 31～35V, spraying current 220～235A；(4) maintenance, to be coated being completely dried can be come into operation.
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| CN102993901A (en) * | 2012-11-26 | 2013-03-27 | 安徽西格尔涂料科技有限公司 | Method for preparing epoxy zinc-rich heavy-duty anticorrosive coating |
| CN103013331A (en) * | 2013-01-08 | 2013-04-03 | 天津大学 | Double-component fluorosilicone rubber ice-covering-proof coating material and preparation method thereof |
| CN103203938A (en) * | 2013-04-12 | 2013-07-17 | 大连交通大学 | Spontaneous heating coating for substrate surface and preparation method of spontaneous heating coating |
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2013
- 2013-10-26 CN CN201310515916.6A patent/CN103612460B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4797325A (en) * | 1984-12-13 | 1989-01-10 | United Kingdom Atomic Energy Authority | Spacecraft materials |
| CN101638549A (en) * | 2009-09-09 | 2010-02-03 | 中国电力科学研究院 | Anti-freezing heating functional coating for transmission line conductor |
| CN102321415A (en) * | 2011-08-11 | 2012-01-18 | 天津大学 | Fluorine-silicon acrylic resin nano composite anti-icing coating and preparation method thereof |
| CN102660182A (en) * | 2012-03-07 | 2012-09-12 | 中国科学院化学研究所 | Nanocomposite ice-coating-proof paint having properties of superhydrophobicity and low adhesive strength |
| CN102993901A (en) * | 2012-11-26 | 2013-03-27 | 安徽西格尔涂料科技有限公司 | Method for preparing epoxy zinc-rich heavy-duty anticorrosive coating |
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| CN103203938A (en) * | 2013-04-12 | 2013-07-17 | 大连交通大学 | Spontaneous heating coating for substrate surface and preparation method of spontaneous heating coating |
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