CN101661125B - Method for manufacturing curved reflector for solar heliostat - Google Patents
Method for manufacturing curved reflector for solar heliostat Download PDFInfo
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- CN101661125B CN101661125B CN2009103024609A CN200910302460A CN101661125B CN 101661125 B CN101661125 B CN 101661125B CN 2009103024609 A CN2009103024609 A CN 2009103024609A CN 200910302460 A CN200910302460 A CN 200910302460A CN 101661125 B CN101661125 B CN 101661125B
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- mirror holder
- bond medium
- curved surface
- silk screen
- mirror
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Abstract
The invention provides a method for manufacturing a curved reflector for a solar heliostat by using an ultrathin mirror face and a mirror holder with a frame structure. The method aims to uses an EVA (ethylene-vinylacetate copolymer) film with melt temperature in a range of between 120 and 140 DEG C to bind the ultrathin mirror face and the mirror holder under a vacuum heating condition. Because of the frame structure of the mirror holder, in order to increase the binding force between the ultrathin mirror face and the mirror holder, a light and convenient metal mesh is arranged in interlayer of the EVA. The manufacturing method can manufacture curved reflectors which have low cost and can be used for the solar heliostat in large scale.
Description
Technical field
The present invention relates to a kind of manufacture method of curved reflector, in particular for the manufacture method of the curved reflector of solar energy heliostat.
Background technology
In considerable commercial plant; particularly in the optical system of Salar light-gathering heliostat; often can use various difform condenser mirrors, comprising the parabolic mirror of the parabolic mirror of slot type, curved surface and the spherical reflector of curved surface etc.Because the requirement for the optical property of catoptron in the application of Salar light-gathering is lower than general optical mirror slip, so the manufacturing of catoptron can not use traditional minute surface method for grinding to reduce manufacturing cost.Generally say, the manufacturing of these catoptrons forms from the distortion of level crossing or flat glass.The forming technology of these catoptrons has two big classes: 1, and high temperature thermal deformation manufacture method and 2, mechanical cold deformation manufacture method.The high temperature thermal deformation manufacture method is exactly earlier glass heats to be arrived soft state, is shaped in mould then, and the back glass blank that is shaped carries out the spraying of reflection horizon plated film and protective seam again.The manufacturing cost of this technology is high.Machinery cold deformation manufacture method is that the mode of glass mirror with mechanical presses is close in the mirror holder of curved surface, and glass mirror is according to the curve form generation mechanically deform of mirror holder, between mirror and the mirror holder by bonding agent or mechanical fixation.The curved surface of the catoptron that this mode is made is than cheap with the high temperature thermal deformation manufacture method, and its optical property is more relatively poor than the minute surface made from high temperature thermal deformation, but can satisfy the demand on the solar concentrating system.The manufacture method of mechanically deform is preferably in the effect aspect the shaping of the flute profile reflecting surface of one dimension, yet for the curve generating of two dimension, is relatively poor such as the effect of sphere shaping aspect, and fixing after chief reason is to be shaped has technical difficulty.Comparatively ideal forming face (mirror holder) should be good, the continuous face of physical strength; In order to satisfy this technical requirement, the weight of mirror holder is essential to be increased, and manufacturing cost is also high, just loses economy in the application of Salar light-gathering.Simultaneously, because the use of bonding agent or mechanical fixation, the protective paint at the mirror back side is exposed to airborne moisture, and the phenomenon that the reflection horizon is corroded can take place in long-time use out of doors, has shortened the serviceable life of catoptron.The method of curved reflector is made in the mechanically deform that the present invention proposes temperature in a kind of usefulness, need not to use the mirror holder of continuous face, has solved weight and expensive problem; Having used can the mirror adhering method of moisture resistance gas as invading, and has prolonged the life-span of mirror, has also improved the optical quality that minute surface is shaped simultaneously.
Summary of the invention
The invention discloses a kind of method of making curved reflector, especially be manufactured on the manufacture method of the curved reflector that uses on the solar-energy light collector, comprising: a mirror holder and a level crossing, one of them face of mirror holder is a curved surface, and shape, the curvature of the shape of this curved surface, curvature and the curved reflector that will make are consistent; Be close together with the mode of the impressed pressure curved surface with this level crossing and mirror holder, two faces after being close to are fixed with bond medium or other mechanical system; It is characterized in that, described bond medium is a kind of ethylene vinyl acetate copolymer (EVA), its temperature of fusion is 120 ℃-140 ℃, this bond medium is tiled on a kind of silk screen, the described lamination of being made up of bond medium and wire gauze is placed between the curved surface and level crossing of described mirror holder, temperature is exerted pressure outward the curved surface of described mirror holder, bond medium, wire gauze and the level crossing of fusing is fixed and be pressed on together so that this bond medium melts in imposing.
The structure of described mirror holder is bar frame shape formula or any structure that has hole, is intended to reduce the weight of mirror holder.Wherein said silk screen can be a wire gauze, plastic silk screen, perhaps any temperature of fusion is higher than the reticular substance of described bond medium, perhaps any light and handy, the bond medium of fusing can be held in the short time and the material of water clock down not.
Temperature makes this bond medium fusing in described the imposing, and exerts pressure outward the curved surface of described mirror holder, the process that bond medium, wire gauze and the level crossing of fusing are pressed on are together carried out under low vacuum or hypobaric environment; Temperature refers to 100 ℃-150 ℃ temperature in described, and described low vacuum or infrabar refer to 1Pa-10, the air pressure of 000Pa.Because heating, fusing and course of exerting pressure carry out under vacuum environment, the curved surface and the air between the glass mirror of mirror holder are taken away, thereby can be closely, void-free being pasted together, to guarantee that glass mirror can well improve the curved surface quality of catoptron according to the curved surface bending of mirror holder.Simultaneously, the use of wire netting and ethylene vinyl acetate copolymer (EVA) can be strengthened the impact resistance of curved reflector, strengthen the adherence force between mirror holder and the glass mirror, impel bar frame shape formula or any have hole the ideal of structure use, therefore significant weight and the manufacturing cost that reduces the mirror holder realized the economy that can use on a large scale; Ethylene vinyl acetate copolymer (EVA) can prevent that moisture from intruding into the reflectance coating at the glass mirror back side and causing corrosion, prolonged the serviceable life of curved mirror.
For more specific description implementation method of the present invention, below provided a specific embodiments.
Description of drawings
Fig. 1 is to use the method disclosed in the present to make the exploded view of the needed material of curved mirror; Among the figure: the 3 mirror holders 4 of flat glass mirror 1 ethylene vinyl acetate copolymer (EVA) diaphragm 2 wire gauzes
Fig. 2 is to use the method disclosed in the present to make the schematic representation of apparatus of curved mirror; Among the figure: heating plate 6 laminaters 7 heating in vacuum chambeies 8 thermocouple thermometers 9 on 4 times heating plates 5 of flat glass mirror 1 ethylene vinyl acetate copolymer (EVA) diaphragm 2 wire gauzes, 3 mirror holders
Specific embodiments
Prepare a long 460mm, wide 460mm, the mirror holder 4 of the aluminium casting of the bar frame shape of thick 25mm, its shape is as shown in Figure 1; Prepare a length of a film 460mm, wide 460mm, the ethylene vinyl acetate copolymer of thick 0.7mm (EVA) diaphragm 2, a long 460mm, wide 460mm, aperture 20 purpose wire gauzes 3 and a length of a film 460mm, wide 460mm, the flat glass mirror 1 of thick 1.1mm, its pressing process as shown in Figure 2, mirror holder 4 with the aluminium casting in heating in vacuum chamber 8 is flat on the top of heating plate 5 down, and the curved surface of mirror holder 4 faces up, and the plane faces down, tiling wire gauze 3 on the curved surface of mirror holder 4, ethylene vinyl acetate copolymer of the same area (EVA) diaphragm 2 be tiled in wire gauze 3 above, the top tiling flat glass mirror 1 of ethylene vinyl acetate copolymer (EVA) diaphragm 2, these several materials put order as depicted in figs. 1 and 2.The upper end that all is pressed in flat glass mirror 1 with the last heating plate 6 of the SURFACES MATCHING of mirror holder 4 with the shape of bottom surface and curvature as shown in Figure 2, sealing heating in vacuum chamber 8, the vacuum tightness that vacuumizes in the chamber reaches＜100Pa, starts well heater, and following heating plate 5 and last heating plate 6 begin heating.Measure the temperature of heating plate 5 down with thermocouple thermometer 9, stop heating when the temperature of heating plate 5 reaches 110 ℃ instantly, kept 10 minutes or when the aluminium sheet temperature reaches 125 ℃, ethylene vinyl acetate copolymer (EVA) diaphragm 2 has fully melted, then start laminater 7, last heating plate 6 is down applied the pressure of 100kPa and kept 30 minutes.Then lay down vacuum and the lid in heating in vacuum chamber 8 is opened, allow curved mirror natural cooling behind the lamination.The curved mirror of finished product can be taken out check when the temperature of heating plate 5 is lower than 60 ℃ instantly.
Claims (4)
1. method of making curved reflector, comprising: prepare a mirror holder and a level crossing, one of them face of mirror holder is a curved surface, and shape, the curvature of the shape of this curved surface, curvature and the curved reflector that will make are consistent; Be close together with the mode of the impressed pressure curved surface with this level crossing and mirror holder, two faces after being close to are fixed with bond medium; It is characterized in that, described bond medium is a kind of ethylene vinyl acetate copolymer (EVA), its temperature of fusion is 120 ° of C-140 ° C, this bond medium is tiled on a kind of silk screen, the lamination of being made up of bond medium and silk screen is placed between the curved surface and level crossing of described mirror holder, the temperature that imposes 150 ° of C of 100 ° of C – is so that this bond medium melts, and exerting pressure outward is pressed on the curved surface of described mirror holder, bond medium, silk screen and the level crossing of fusing together.
2. a kind of method of making curved reflector according to claim 1, it is characterized in that wherein said outer exerting pressure carried out the curved surface of described mirror holder, the process that bond medium, silk screen and the level crossing of fusing are pressed on together under low vacuum or hypobaric environment; Described low vacuum or infrabar refer to 1Pa-10, the air pressure of 000Pa.
3. a kind of method of making curved reflector according to claim 1 is characterized in that, the structure of wherein said mirror holder is bar frame shape formula or any structure that has hole.
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4. a kind of method of making curved reflector according to claim 1, it is characterized in that, wherein said silk screen is a wire gauze, plastic silk screen, perhaps other any temperature of fusion is higher than the reticular substance of described bond medium, perhaps any light and handy, the bond medium of fusing can be held in the short time and the material of water clock down not.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103024609A CN101661125B (en) | 2009-05-20 | 2009-05-20 | Method for manufacturing curved reflector for solar heliostat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103024609A CN101661125B (en) | 2009-05-20 | 2009-05-20 | Method for manufacturing curved reflector for solar heliostat |
Publications (2)
| Publication Number | Publication Date |
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| CN101661125A CN101661125A (en) | 2010-03-03 |
| CN101661125B true CN101661125B (en) | 2011-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009103024609A Expired - Fee Related CN101661125B (en) | 2009-05-20 | 2009-05-20 | Method for manufacturing curved reflector for solar heliostat |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101980063A (en) * | 2010-09-10 | 2011-02-23 | 何斌 | One-dimensional light-condensing drawing-formed groove-type parabolic mirror and manufacturing method thereof |
| CN102565901B (en) * | 2010-12-17 | 2014-06-04 | 北京兆阳光热技术有限公司 | Curved-surface reflecting mirror and manufacturing method thereof |
| CN102621678B (en) * | 2011-01-28 | 2015-03-11 | 上海工电能源科技有限公司 | Micro-arc curved surface glass collecting mirror of solar heliostat |
| CN102759765B (en) * | 2011-04-28 | 2014-11-05 | 北京兆阳光热技术有限公司 | Curved mirror reflector and production method thereof |
| CN102778740B (en) * | 2011-05-10 | 2014-12-17 | 北京兆阳光热技术有限公司 | Reflector fixing device |
| CN102495440A (en) * | 2011-12-29 | 2012-06-13 | 中国华能集团清洁能源技术研究院有限公司 | Solar-energy cambered-surface reflector machinery bending molding method |
| CN102589179B (en) * | 2012-02-27 | 2015-03-04 | 深圳市联讯创新工场科技开发有限公司 | Heliostat lens support |
| CN103940109B (en) * | 2014-04-11 | 2016-08-10 | 中国华能集团清洁能源技术研究院有限公司 | A kind of Fresnel solar energy reflection mirror support and processing method thereof |
| CN105182500B (en) * | 2015-10-28 | 2017-05-17 | 浙江大明玻璃有限公司 | Packaging method of flat solar reflectors with metallic gasket connecting pieces |
| CN113649281A (en) * | 2021-09-02 | 2021-11-16 | 安平县星火金属制品有限公司 | Novel wave screen and manufacturing method |
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2009
- 2009-05-20 CN CN2009103024609A patent/CN101661125B/en not_active Expired - Fee Related
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Owner name: BEIJING YINGTIAN SUNSHINE SOLAR ENERGY TECHNOLOGY Free format text: FORMER OWNER: CHEN YINGTIAN Effective date: 20110120 |
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Free format text: CORRECT: ADDRESS; FROM: 230000 DEPARTMENT OF ASTRONOMY AND APPLIED PHYSICS, UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA, NO.96, JINZHAI ROAD, HEFEI CITY, ANHUI PROVINCE TO: 100085 303, BUILDING 4, SHANGDI TECHNOLOGY BUILDING, YARD 8, SHANGDI WEST ROAD, HAIDIAN DISTRICT, BEIJING |
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Effective date of registration: 20110120 Address after: 100085, building 4, building 8, science and technology building, No. 303 West Road, Beijing, Haidian District Applicant after: Beijing Yingtian Yangguang Solar Energy Technology Co., Ltd. Address before: 230000 Department of astronomy and Applied Physics, University of Science & Technology China, 96 Jinzhai Road, Hefei, Anhui Applicant before: Chen Yingtian |
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