CN102126863A - High-temperature and high-pressure resisting heat insulating paint and method for preparing coating by utilizing same - Google Patents
High-temperature and high-pressure resisting heat insulating paint and method for preparing coating by utilizing same Download PDFInfo
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- CN102126863A CN102126863A CN2010100324731A CN201010032473A CN102126863A CN 102126863 A CN102126863 A CN 102126863A CN 2010100324731 A CN2010100324731 A CN 2010100324731A CN 201010032473 A CN201010032473 A CN 201010032473A CN 102126863 A CN102126863 A CN 102126863A
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Abstract
The invention relates to a high-temperature and high-pressure resisting heat insulating paint and a method for preparing a coating by utilizing the paint. The invention solves the problems that the traditional heat insulating paint has low heat-resistant temperature and easily drops when washed by high-speed combustion gas flow, the preparation process of the coating is complex and the application requirements of an aviation bomb booster rocket engine that the temperature of the gas is more than or equal to 3000 DEG C and the pressure of the gas is more than or equal to 25MPa can not be met. The paint provided by the invention is composed of thermosetting phenolic resin, green silicon carbide powder and white corundum powder. The method comprises the following steps of: driving an engine combustion chamber to be coated to rotate around the axis of of the engine combustion chamber by an idler wheel; moving a spray gun pipe from the right end to the left end of the combustion chamber along a guide rail under the driving of a trolley moving, spraying, and then curing to obtain a uniform coating. The coating has the heat conductivity of 0.006-0.007W/m.K, the heat resistance temperature of more than or equal to 3000 DEG C and the gas resistance pressure of 25-30MPa, the coating is simple to prepare, and the coating can be used for the aviation bomb booster rocket engine.
Description
Technical field
The present invention relates to thermal insulating coating and prepare the method for coating.
Background technology
Thermal insulating coating is meant the oxide compound inorganic paint of high-melting-point, lower thermal conductivity, be used to stop high temperature, the invasion of high-pressure gas heat, to improve the use temperature and the high-temperature capability of basic metal components, in the time of 0.3s～0.5s, produce 8 * 10 during the work of aerial bomb booster rocket engine
4N～1 * 10
5The thrust of N, the indoor fuel gas temperature of engine combustion this moment is up to 3000 ℃, and gaseous-pressure reaches 25MPa if directly contact with the engine combustion locular wall, a large amount of heats of combustion gas are passed to the combustion chamber inwall, after locular wall is heated, produce certain thermograde in the combustion chamber wall, the combustion chamber internal surface temperature raises, material expands bigger, hull-skin temperature is lower, and it is less to expand, and this just makes inner wall layer expand and is subjected to outer field constraint, make to produce certain thermal stresses in the burning chamber shell, easily cause the combustion chamber explosion; The more important thing is the burning chamber shell metallic substance at high temperature its mechanical property significantly reduce, adopt the measure of spraying heat insulating coat to prevent that the case temperature of engine from rising, and makes engine not produce overheated and reliable operation at the working hour inner housing for this reason.Existing engine combustion chamber interior walls thermal insulating coating is to be tackiness agent with the silicone resin, adding titanium dioxide, chromium sesquioxide, white mica and talcum powder is the coating of filler, when this coating is higher than 2000 ℃ when temperature, titanium dioxide, chromium sesquioxide in the coating easily come off, lost effect of heat insulation, its thermal conductivity is 0.0504W/mK, can not be applied to temperature of combustion up to 3000 ℃, on the aerial bomb booster rocket engine of gaseous-pressure 25MPa.The processing method of existing engine chamber inside coating is: with a mould that outer shape is consistent with the engine chamber interior shape, be placed on engine combustion indoor, forming a gap between the machine combustion chamber inwall of the outer wall of mould and engine is 0.75mm～1.2mm, after the space that this gap is formed vacuumizes then, 2 * 10
4Under the effect of the power of N, solidify, at last mould is removed being full of to be placed under the high temperature in the liquid coating suction gap that configures, obtain sticking on the coating on the engine combustion chamber interior walls, this processing method is removed the process difficulty of mould, complicated operation, and product percent of pass is low.
Summary of the invention
The present invention be for solve existing thermal insulating coating heat resisting temperature low, under the washing away of high-speed fuel gas stream, easily come off, the preparation technology of coating complexity, can not satisfy fuel gas temperature up to 3000 ℃, gaseous-pressure is the problem of the aerial bomb booster rocket engine application requiring of 25MPa, and the preparation method of a kind of high temperature high voltage resistant thermal insulating coating and coating is provided.
A kind of high temperature high voltage resistant thermal insulating coating of the present invention is made up of 20%～30% heat-reactive phenolic resin, 40%～50% green silicon carbide powder and 20%～40% white diamond spar powder by mass percentage.
The method of utilizing above-mentioned a kind of high temperature high voltage resistant thermal insulating coating to prepare coating is carried out according to the following steps: one, bearing is fixed on and rolls on the frame, roller links to each other with the roller motor by seat supports and by transmission shaft, belt gear, and engine chamber to be sprayed is placed on the roller; Two, guide rail is fixed on the guide rail bracket, spray gun is fixed on the coaster that moves along guide rail, and make the dead in line of the axis and the engine chamber of spray gun; Spray gun links to each other with material-storage jar by flexible pipe; Three, above-mentioned high temperature high voltage resistant thermal insulating coating is joined in the material-storage jar; Four, start the roller motor, roller rotated, and drive engine chamber by 80 rev/mins～220 rev/mins rotating speed around its axis rotation; Five, start the coaster motor, after the wheel box speed change, coaster is moved to engine chamber along the speed of guide rail drive spray gun with 0.8m/min～1.5m/min, when Spray gun nozzle arrives the right-hand member of engine chamber, start the spray gun spraying, the pressure at Spray gun nozzle place is 0.1MPa～0.15Mpa, when the nozzle of spray gun arrives the left end of engine chamber, the coaster reversing motion, spraying makes the thickness of coating reach 0.5mm～0.8mm repeatedly; Six, will spray good engine chamber and be placed into and solidify in the drying baker, and be warming up to 100 ℃～110 ℃ maintenance 30min～50min, naturally cool to room temperature then, promptly obtain the high temperature high voltage resistant heat insulating coat by the speed of 0.8 ℃/min～1.3 ℃/min.
The present invention adopts heat-reactive phenolic resin, heat-stable material green silicon carbide powder and the mixing of white diamond spar powder obtain the coating that viscosity is 40s～60s (measuring with coating-4 viscosity meter), good with the adhesiveproperties of combustion chamber metallic walls (30CrMnSiA material), coating thermal expansivity and metal shell are approaching, when variation of ambient temperature, can adapt to expanding with heat and contract with cold of metal shell, do not come off, under shock and vibration, do not destroy, high temperature resistant material in the coating is green silicon carbide powder and white diamond spar powder, coat-thickness is 0.5mm～0.8mm, and its thermal conductivity is 0.006W/mK～0.007W/mK, has excellent heat insulation property, do not come off under 3000 ℃ temperature and 25MPa～30Mpa pressure, can effectively play heat insulation barrier propterty, coating property is stable, and the coating for preparing reaches 20 years storage period, make easily, technology is simple.Engine chamber is the cylindrical tube of φ 205mm * 2.8m～3.0mm, makes the axis translational motion of spray gun along cylinder inboard wall when cylindrical shell rotates, and at the even coating that applies of the internal surface of cylindrical shell, coating gets final product through solidifying again.Adopt this coating technology to solve the heat-insulating problem of aerial bomb booster combustion chamber, after paying in-service operational trial, none is sent out the combustion chamber and produces explosion or produce local convex closure phenomenon, and thermotolerance is reliable, stable.The processing method of preparation coating is simple, solidifies the operating process of not removing mould after finishing, the efficient height.
Description of drawings
Fig. 1 is the spraying equipment synoptic diagram of embodiment one, and wherein 1 is bearing, the 2nd, roll frame, the 3rd, roller, the 4th, transmission shaft, the 5th, belt gear, the 6th, roller motor, the 7th, guide rail, the 8th, guide rail bracket, the 9th, spray gun, the 10th, coaster, the 11st, flexible pipe, the 12nd, material-storage jar, the 13rd, engine chamber, the 14th, coaster motor, the 15th, wheel box, the 16th, Spray gun nozzle; Fig. 2 is the cut-away view of the spraying equipment A-A face of embodiment one, and wherein 17 is coatings.
Embodiment
Embodiment one: a kind of high temperature high voltage resistant thermal insulating coating of present embodiment, form by 20%～30% heat-reactive phenolic resin, 40%～50% green silicon carbide powder and 20%～40% white diamond spar powder by mass percentage.
Present embodiment high temperature resistant, the adhesiveproperties of high pressure resistant thermal insulating coating and combustion chamber metallic walls (30CrMnSiA material) is good, coating thermal expansivity and metal shell are approaching, when variation of ambient temperature, can adapt to expanding with heat and contract with cold of metal shell, do not come off, under shock and vibration, do not destroy, high temperature resistant material in the coating is green silicon carbide powder and white diamond spar powder, coat-thickness is 0.5mm～0.8mm, and its thermal conductivity is 0.006W/mK～0.007W/mK, has excellent heat insulation property, under washing away, the gas-flow of 3000 ℃ temperature and 25MPa do not come off, can effectively carry out heat insulation, the stable performance of coating, the coating for preparing reaches 20 years storage period.
Embodiment two: what present embodiment and embodiment one were different is: the fineness of described green silicon carbide powder is 380 orders～460 orders.The fineness of described green silicon carbide powder is.
Embodiment three: what present embodiment was different with embodiment one or two is: the fineness of described green silicon carbide powder is 400 orders～450 orders.Other is identical with embodiment one or two.
Embodiment four: what present embodiment and embodiment one to three were different is: the fineness of described green silicon carbide powder is 420 orders.Other is identical with embodiment one to three.
Embodiment five: what present embodiment and embodiment one to four were different is: the fineness of described white diamond spar powder is 280 orders～500 orders.Other is identical with embodiment one to four.
Embodiment six: what present embodiment and embodiment one to five were different is: the fineness of described white diamond spar powder is 300 orders～400 orders.Other is identical with embodiment one to five.
Embodiment seven: what present embodiment and embodiment one to six were different is: the fineness of described white diamond spar powder is 320 orders.Other is identical with embodiment one to six.
Embodiment eight: present embodiment with different with embodiment one is: the high temperature high voltage resistant thermal insulating coating is made up of 22%～28% heat-reactive phenolic resin, 42%～48% green silicon carbide powder and 25%～35% white diamond spar powder by mass percentage.
Embodiment nine: what present embodiment and embodiment one were different is: the high temperature high voltage resistant thermal insulating coating is made up of 25% 1411 phenol resin solutions, 45% green silicon carbide powder and 30% white diamond spar powder by mass percentage.
Described 1411 phenol resin solutions of present embodiment, green silicon carbide powder and white diamond spar powder are the commercial goods.
The preparation method of a kind of high temperature high voltage resistant thermal insulating coating of present embodiment is: 25% heat-reactive phenolic resin, 45% green silicon carbide powder and 30% white diamond spar powder mix and get final product by mass percentage.
The adhesiveproperties of the high temperature high voltage resistant thermal insulating coating of present embodiment and combustion chamber metal cylinder inwall (material is 30CrMnSiA) is good, coating thermal expansivity and metal shell are approaching, when variation of ambient temperature, can adapt to expanding with heat and contract with cold of metal shell, do not come off, under shock and vibration, do not destroy, high temperature resistant material in the coating is green silicon carbide powder and white diamond spar powder, coat-thickness is 0.7mm, and its thermal conductivity is 0.00658W/mK, has excellent heat insulation property, do not come off under 3000 ℃ temperature and the 25MPa pressure, can be effectively heat insulation, the stable performance of coating, the coating for preparing reaches 20 years storage period.
Embodiment ten: the method that (referring to Fig. 1, Fig. 2) present embodiment utilizes above-mentioned a kind of high temperature high voltage resistant thermal insulating coating to prepare coating is carried out according to the following steps: one, bearing 1 is fixed on and rolls on the frame 2, roller 3 is supported by bearing 1 and links to each other with roller motor 6 by transmission shaft 4, belt gear 5, and engine chamber 13 to be sprayed is placed on the roller 3; Two, guide rail 7 is fixed on the guide rail bracket 8, spray gun 9 is fixed on the coaster 10 that moves along guide rail 7, and make the dead in line of the axis and the engine chamber 13 of spray gun 9; Spray gun 9 links to each other with material-storage jar 12 by flexible pipe 11; Three, embodiment one described high temperature high voltage resistant thermal insulating coating is joined in the material-storage jar 12; Four, start roller motor 6, roller 3 rotated, and drive engine chamber 13 by 80 rev/mins～220 rev/mins rotating speed around its axis rotation; Five, start coaster motor 14, after wheel box 15 speed changes, coaster 10 is moved to engine chamber 13 along the speed of guide rail 7 drive spray guns 9 with 0.8m/min～1.5m/min, when Spray gun nozzle 16 arrives the right-hand member of engine chamber 13, start the spray gun spraying, the pressure at Spray gun nozzle 16 places is 0.1MPa～0.15Mpa, when the nozzle 16 of spray gun arrives the left end of engine chamber 13, coaster 10 reversing motions, spraying makes the thickness of coating reach 0.5mm～0.8mm repeatedly; Six, will spray good engine chamber and be placed into and solidify in the drying baker, and be warming up to 100 ℃～110 ℃ and keep 30min～50min, naturally cool to room temperature then, promptly obtain the high temperature high voltage resistant heat insulating coat by 8 ℃/10min～13 ℃/speed of 10min.
The preparation method of present embodiment coating is simple, and is efficient.
Embodiment 11: what present embodiment and embodiment ten were different is: in the step 4 engine chamber 13 by rotating speed be 100 rev/mins～200 rev/mins around its axis rotation.Other is identical with embodiment ten.
Embodiment 12: what present embodiment was different with embodiment ten or 11 is: in the step 4 engine chamber 13 by rotating speed be 150 rev/mins around the rotation of its axis.Other is identical with embodiment ten or 11.
Embodiment 13: what present embodiment and embodiment ten to 12 were different is: lance tube 9 moves to engine chamber 13 with the speed of 1m/min～1.2m/min in the step 5.Other is identical with embodiment ten to 12.
Embodiment 14: what present embodiment and embodiment ten to 13 were different is: lance tube 9 moves to engine chamber 13 with the speed of 1.1m/min in the step 5.Other is identical with embodiment ten to 13.
Embodiment 15: what present embodiment and embodiment ten to 14 were different is: the pressure at Spray gun nozzle 16 places is 0.11MPa～0.14Mpa in the step 5.Other is identical with embodiment ten to 14.
Embodiment 16: what present embodiment and embodiment ten to 15 were different is: the pressure at Spray gun nozzle 16 places is 0.13MPa in the step 5.Other is identical with embodiment ten to 15.
Embodiment 17: what present embodiment and embodiment ten to 16 were different is: the thickness of step 5 floating coat is 0.55mm～0.75mm.Other is identical with embodiment ten to 16.
Embodiment 18: what present embodiment and embodiment ten to 17 were different is: the thickness of step 5 floating coat is 0.65mm.Other is identical with embodiment ten to 17.
Embodiment 19: what present embodiment and embodiment ten to 18 were different is: will spray good engine chamber in the step 6 and be placed in the drying baker, be warming up to 101 ℃～109 ℃ by the speed of 0.9 ℃/min～1.2 ℃/min and keep 35min～45min, naturally cool to room temperature then.Other is identical with embodiment ten to 18.
Embodiment 20: what present embodiment and embodiment ten to 19 were different is: will spray good engine chamber in the step 6 and be placed in the drying baker, and be warming up to 105 ℃ of maintenance 40min by the speed of 1 ℃/min, and naturally cool to room temperature then.Other is identical with embodiment ten to 19.
Embodiment 21: the embodiment nine described high temperature high voltage resistant thermal insulating coatings that utilize of present embodiment prepare the method for coating, carry out according to the following steps: one, bearing 1 is fixed on and rolls on the frame 2, roller 3 is supported by bearing 1 and links to each other with roller motor 6 by transmission shaft 4, belt gear 5, and engine chamber 13 to be sprayed is placed on the roller 3; Two, guide rail 7 is fixed on the guide rail bracket 8, spray gun 9 is fixed on the coaster 10 that moves along guide rail 7, and make the dead in line of the axis and the engine chamber 13 of spray gun 9; Spray gun 9 links to each other with material-storage jar 12 by flexible pipe 11; Three, embodiment nine described high temperature high voltage resistant thermal insulating coatings are joined in the material-storage jar 12; Four, start roller motor 6, roller 3 rotated, and drive engine chamber 13 by 120 rev/mins rotating speed around its axis rotation; Five, start coaster motor 14, after wheel box 15 speed changes, coaster 10 is moved to engine chamber 13 along the speed of guide rail 7 drive spray guns 9 with 1.2m/min, when Spray gun nozzle 16 arrives the right-hand member of engine chamber 13, start the spray gun spraying, the pressure at Spray gun nozzle 16 places is 0.15Mpa, when the nozzle 16 of spray gun arrives the left end of engine chamber 13, coaster 10 reversing motions, spraying makes the thickness of coating reach 0.8mm repeatedly; Six, will spray good engine chamber and be placed into and solidify in the drying baker, and be warming up to 110 ℃ of maintenance 40min, naturally cool to room temperature then, promptly obtain the high temperature high voltage resistant heat insulating coat by the speed of 0.9 ℃/min～1.3 ℃/min.
The preparation technology of present embodiment coating is simple, and is efficient.
The metallic substance of present embodiment in the combustion chamber of aerial bomb booster is 30CrMnSiA, wall thickness is 2.8mm～3.0mm, be processed with 10 of the engine chambers of heat insulating coat, warp and 10 of the engine chambers that does not spray heat insulating coat, millet cake fire test simultaneously, test-results: have after the engine chamber ignition operation of heat insulating coat none send out and damage.And do not have 6 generation combustion chamber explosions of heat insulating coat, 4 combustion chambers to produce big convex closures, and after the combustion chamber of verification experimental verification aerial bomb booster rocket engine prepares coating, the combustion chamber reliable operation.
Claims (10)
1. high temperature high voltage resistant thermal insulating coating is characterized in that a kind of high temperature high voltage resistant thermal insulating coating is made up of 20%～30% heat-reactive phenolic resin, 40%～50% green silicon carbide powder and 20%～40% white diamond spar powder by mass percentage.
2. a kind of high temperature high voltage resistant thermal insulating coating according to claim 1, the fineness that it is characterized in that described green silicon carbide powder is 380～460 orders.
3. a kind of high temperature high voltage resistant thermal insulating coating according to claim 1 and 2, the fineness that it is characterized in that described white diamond spar powder is 280～500 orders.
4. a kind of high temperature high voltage resistant thermal insulating coating according to claim 1 is characterized in that a kind of high temperature high voltage resistant thermal insulating coating is made up of 22%～28% heat-reactive phenolic resin, 42%～48% green silicon carbide powder and 25%～35% white diamond spar powder by mass percentage.
5. utilize a kind of high temperature high voltage resistant thermal insulating coating as claimed in claim 1 to prepare the method for coating, it is characterized in that the method for preparing coating carries out according to the following steps: one, bearing (1) is fixed on and rolls on the frame (2), roller (3) is supported by bearing (1) and links to each other with roller motor (6) by transmission shaft (4), belt gear (5), and engine chamber to be sprayed (13) is placed on the roller (3); Two, guide rail (7) is fixed on the guide rail bracket (8), spray gun (9) is fixed on along on the mobile coaster (10) of guide rail (7), and make the dead in line of the axis and the engine chamber (13) of spray gun (9); Spray gun (9) links to each other with material-storage jar (12) by flexible pipe (11); Three, the described high temperature high voltage resistant thermal insulating coating of claim 1 is joined in the material-storage jar (12); Four, start roller motor (6), roller (3) rotated, and drive engine chamber (13) by 80 rev/mins～220 rev/mins rotating speed around its axis rotation; Five, start coaster motor (14), after wheel box (15) speed change, it is mobile to engine chamber (13) with the speed of 0.8m/min～1.5m/min to make coaster (10) drive spray gun (9) along guide rail (7), when Spray gun nozzle (16) arrives the right-hand member of engine chamber (13), start the spray gun spraying, the pressure that Spray gun nozzle (16) is located is 0.1MPa～0.15Mpa, when the nozzle (16) of spray gun arrives the left end of engine chamber (13), coaster (10) reversing motion, spraying makes the thickness of coating reach 0.5mm～0.8mm repeatedly; Six, will spray good engine chamber and be placed into and solidify in the drying baker, and be warming up to 100 ℃～110 ℃ maintenance 30min～50min, naturally cool to room temperature then, promptly obtain the high temperature high voltage resistant heat insulating coat by the speed of per 0.8 ℃/min～1.3 ℃/min.
6. the method for preparing coating according to claim 5, it is characterized in that engine chamber in the step 4 (13) with rotating speed be 100 rev/mins～200 rev/mins around the rotation of its axis.
7. according to claim 5 or the 6 described methods that prepare coating, it is characterized in that spray gun in the step 5 (9) moves to engine chamber (13) with the linear velocity of 1m/min～1.2m/min.
8. the method for preparing coating according to claim 7 is characterized in that the pressure that Spray gun nozzle in the step 5 (16) is located is 0.11MPa～0.14Mpa.
9. according to claim 5, the 6 or 8 described methods that prepare coating, the thickness that it is characterized in that the step 5 floating coat is 0.55mm～0.75mm.
10. the method for preparing coating according to claim 9, it is characterized in that will spraying in the step 6 good engine chamber (13) is placed in the drying baker, be warming up to 101 ℃～109 ℃ by the speed of 0.9 ℃/min～1.2 ℃/min and keep 35min～45min, naturally cool to room temperature then.
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| CN 201010032473 CN102126863B (en) | 2010-01-18 | 2010-01-18 | Method for preparing coating by utilizing high-temperature and high-pressure resisting heat insulating paint |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010032473 CN102126863B (en) | 2010-01-18 | 2010-01-18 | Method for preparing coating by utilizing high-temperature and high-pressure resisting heat insulating paint |
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| CN102126863B CN102126863B (en) | 2013-03-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103551290A (en) * | 2013-10-24 | 2014-02-05 | 西安航天化学动力厂 | Method for spraying silicone rubber paint layer on engine shell |
| CN103788809A (en) * | 2012-10-29 | 2014-05-14 | 中国石油化工股份有限公司 | High-temperature-resistant corrosion-resistant coating material and preparation method of coating based on the coating material |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100418920C (en) * | 2007-01-26 | 2008-09-17 | 牟元全 | Abrasion resistant ceramic coating |
| CN101328077B (en) * | 2008-07-17 | 2011-11-09 | 居小平 | Oxidation protection air block layer coating of carbon/carbon composite material aircraft brake member |
| CN101508589B (en) * | 2009-03-11 | 2012-01-18 | 深圳市恒拓科技有限公司 | Composition for producing furnace liner and method for producing furnace liner |
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2010
- 2010-01-18 CN CN 201010032473 patent/CN102126863B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103788809A (en) * | 2012-10-29 | 2014-05-14 | 中国石油化工股份有限公司 | High-temperature-resistant corrosion-resistant coating material and preparation method of coating based on the coating material |
| CN103551290A (en) * | 2013-10-24 | 2014-02-05 | 西安航天化学动力厂 | Method for spraying silicone rubber paint layer on engine shell |
| CN103551290B (en) * | 2013-10-24 | 2014-09-10 | 西安航天化学动力厂 | Method for spraying silicone rubber paint layer on engine shell |
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| CN102126863B (en) | 2013-03-20 |
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