CN105253290A - Thermal shield with high wave transparent and low aiming line error - Google Patents
Thermal shield with high wave transparent and low aiming line error Download PDFInfo
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- CN105253290A CN105253290A CN201510782605.5A CN201510782605A CN105253290A CN 105253290 A CN105253290 A CN 105253290A CN 201510782605 A CN201510782605 A CN 201510782605A CN 105253290 A CN105253290 A CN 105253290A
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- radome
- heat baffle
- line error
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- wave transparent
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Abstract
The invention discloses a thermal shield with the high wave transparency and the low aiming line error. The thermal shield is fixed in a radar radome, the overall thermal shield is of a rotator structure, the shape structure of the thermal shield is co-shaped with the overall internal shape of the radar radome or is co-shaped with the partial internal shape of the radar radome or is of a hemispherical structure, the thermal shield is made of oxide materials with the low dielectric constant or aerogel-based composite materials, the good thermal isolation property is achieved, and meanwhile the high wave transparent property and the low aiming line error property are achieved. According to the thermal shield, by reasonably selecting the materials and structure of the thermal shield, reflection generated between the radar radome and the thermal shield can be counteracted within a certain work frequency range to be extremely little; accordingly, on the basis of not significantly reducing the electrical properties, the thermal property of the radar radome is significantly promoted, the excellent electrical properties of wave transparency and aiming line error are kept, and the problem that the thermal isolation property of the radar radome is not good under the high temperature condition is solved.
Description
Technical field
The present invention relates to a kind of heat baffle possessing high wave transparent low anchor line error.
Background technology
Radome integrates the functional parts that electric property, structural strength, aerodynamic configuration and specific function require, is a kind of facility that protection antenna system can normally work in severe environmental conditions.Electric property evaluates the decisive indicator of radome quality, along with the increase of flight Mach number, improves the requirement of radome performance particularly electrical property thereupon.
Hypersonic vehicle flies in atmospheric envelope, there is serious Aerodynamic Heating phenomenon, and the Aerodynamic Heating environment of re-entry phase is more severe, and its surface temperature reaches more than 1000 DEG C, even higher.The guidance signal receiving antenna loaded is assembled into one with the wave transparent radome device carried, be arranged on antenna window, radome device is the important component part of guidance system, be again a part for Flight Vehicle Structure, carry the several functions such as water conservancy diversion, solar heat protection, wave transparent and carrying simultaneously.This device must possess good thermal protection ability, anti shock and vibration mechanical property and good electric property, radome design also just becomes the research emphasis that hypersonic vehicle Antenna Design manufactures, and its thermal protection ability becomes one of content that structure design pays close attention to especially.
Radome thermal insulation material also must should meet following basic demand while consideration high-temperature stability:
1, there are excellent dielectric properties.Radome material General Requirements has low specific inductance capacity and loss tangent, simultaneously also should when temperature significant change (high temperature after normal temperature and Aerodynamic Heating), and its specific inductance capacity and loss tangent can not have significant change.The loss tangent of material is larger, and electromagnetic wave energy energy of loss in through radome process is more.
2, thermal shock resistance is good.Square being directly proportional of the radome surface temperature that Aerodynamic Heating causes and flying speed, the thermal change rate produced on radome cover wall during hypersonic vehicle re-entry flight can reach 500 DEG C/more than s, instantaneous sharply temperature rise can form multiple thermal drop along the normal direction of radome axis direction cover wall, thus produces very large thermal stress.Radome thermal insulation material must have the ability of very low linear expansion factor and excellent heat shock resistance.
3, can to manufacture and processability.Material manufacturability and processibility good, each position of heat baffle should be even.
In patent CN102248732B, relate to a kind of preparation method of wave transparent-thermal protection laminated material, respectively machine up and surface treatment are carried out to quartz fiber reinforced composite material and quartz fiber composite heat-insulated material, again bi-material is bonded together, carry out dry solidification and obtain wave transparent-thermal protection laminated material, stress material preparation technology, do not relate to device preparation.
In patent CN102531521B, disclose a kind of constant pressure and dry and prepare wave transparent SiO
2the method of aerogel heat-proof composite material, does not relate to the wave transparent of this kind of material and the design of heat-proof quality and actual effect.
In patent CN102642350B, describe a kind of high temperature insulation sandwich construction ceramic composite and preparation method thereof, frame mode adopts sandwich construction, sandwich layer is the aerogel composite layer that high-temperature-resistant inorganic fibre strengthens, sandwich layer upper and lower surface is compounded with high-temperature-resistant inorganic fibre and strengthens oxide ceramics composite material surface plate, does not relate to the preparation of cover body device.
Compared with above-mentioned representative Patents, involved in the present invention is a kind of heat baffle with the ad hoc structure of high wave transparent and low anchor line error performance, by selecting suitable thermal insulation material, and realize the Combined design of wave transparent, aiming-line error and heat-proof quality with radome, meet the performance requriements such as mechanical, electrical, hot of radome, there is significant technical characterstic.
Summary of the invention
The invention provides a kind of heat baffle possessing high wave transparent low anchor line error, by choose reasonable thermal shield material and structure, being reflected in certain operating frequency range of making to produce between radome and heat baffle cancels each other so that becomes very little, thus reducing on the basis of electrical property not significantly, the thermal behavior of remarkable lifting radome, and keep the electrical properties such as excellent wave transparent and aiming-line error, solve the difficult problem that radome heat-proof quality under hot conditions is not good.
In order to achieve the above object, the invention provides a kind of heat baffle possessing high wave transparent low anchor line error, this heat baffle is fixed on radome inside, described heat baffle entirety is rotation body structure, the contour structures of this heat baffle and the interior shape entirety of radome conformal, or with the interior shape Local conformal of radome, or in hemispherical dome structure, the Material selec-tion of heat baffle has oxide material or the aerogel based composites of low-k, there is good heat-proof quality, there is high wave penetrate capability and low anchor line error performance simultaneously.
The cover wall construction of described heat baffle adopts the combination of the corrugated structure of porous or the corrugated structure of the sphere curved surface structure of porous or porous and the sphere curved surface structure of porous.
When radome is subject to electromagenetic wave radiation, the contour structures of heat baffle and the interior shape entirety of radome conformal, or heat baffle is hemispherical dome structure, when radome is not subject to electromagenetic wave radiation, the contour structures of heat baffle and the interior shape Local conformal of radome.
The material structure of described heat baffle is any one or more than one the mechanical combination in foam texture, fiber structure or airsetting colloid form structure.
Described oxide material is any one or more than one the mechanical combination in silicon dioxide, aluminium oxide or siliceous, aluminium derivant.
The specific inductance capacity of the material of heat baffle is less than or equal to 10, and loss tangent is less than 0.01.
By bonding mode or mechanical connection manner, described heat baffle and radome are connected to one.
The present invention is by choose reasonable thermal shield material and structure, being reflected in certain operating frequency range of making to produce between radome and heat baffle cancels each other so that becomes very little, thus reducing on the basis of electrical property not significantly, the thermal behavior of remarkable lifting radome, and keep the electrical properties such as excellent wave transparent and aiming-line error, solve the difficult problem that radome heat-proof quality under hot conditions is not good.
Accompanying drawing explanation
Fig. 1 is the mounting structure schematic diagram of heat baffle provided by the invention.
Fig. 2 is the enlarged drawing in A portion in Fig. 1.
Fig. 3 is the diagram of curves that the internal temperature before and after radome assembling heat baffle compares.
Fig. 4 is the diagram of curves that the wave transmission rate before and after radome assembling heat baffle compares.
Fig. 5 is the diagram of curves that the aiming-line error before and after radome assembling heat baffle compares.
Detailed description of the invention
Following according to Fig. 1 ~ Fig. 5, illustrate preferred embodiment of the present invention.
As depicted in figs. 1 and 2, the invention provides a kind of heat baffle possessing high wave transparent low anchor line error, it is inner that this heat baffle 2 is fixed on radome 1, described heat baffle 2 and radome 1 is connected to one by bonding mode or mechanical connection manner (metal exchanging structure 3 as shown in Figures 1 and 2).
Described heat baffle 2 entirety is rotation body structure, namely specific curves rotates around axis of symmetry, the cover wall construction of heat baffle 2 adopts the combination (" combination " refers to that last point of heat baffle is the corrugated structure of porous, and another part is the sphere curved surface structure of porous) of the corrugated structure of porous or the corrugated structure of the sphere curved surface structure of porous or porous and the sphere curved surface structure of porous.
Described heat baffle 2 contour structures considers bulk design according to radome wave transparent and aiming-line error performance simultaneously, the contour structures of this heat baffle 2 and the interior shape entirety of radome conformal, or with the interior shape Local conformal of radome, or in hemispherical dome structure, wherein, when radome 1 is subject to electromagenetic wave radiation, need to adopt overall conformal or semisphere heat baffle, thus reduce the reflection between radome 1 and heat baffle 2 at certain operating frequency range, when radome 1 is not subject to electromagenetic wave radiation, adopt Local conformal heat baffle, play effect of heat insulation.
The Material selec-tion of described heat baffle 2 has oxide material or the aerogel based composites of low-k, has good heat-proof quality, has high wave penetrate capability and low anchor line error performance simultaneously.
In addition, the specific inductance capacity general control of the material of heat baffle 2 is within 10, and loss tangent is less than 0.01.
The material structure of described heat baffle 2 is foam textures, (mechanical combination is according to the requirement of diverse location to the performance characteristic such as dielectric properties, intensity for any one or more than one mechanical combination in fiber structure or airsetting colloid form structure, select different structures, final mechanical combination together).
Described oxide material is any one or more than one the mechanical combination in silicon dioxide, aluminium oxide or siliceous, aluminium derivant.
Embodiment 1
Based on a kind of fibre-reinforced high molecular based composites radome, the theoretical and temperature requirement according to microwave transmission line, the shape of design heat baffle and thickness, and select fiber reinforcement SiO
2aerogel based composites as thermal shield material, to prepare the heat baffle of high wave transparent low anchor line error.Heat baffle adopts hemispherical dome structure, and semisphere heat baffle diameter is identical with radome maximum inner diameter, by bonding way, heat baffle and radome is connected as one.Respectively to the radome with heat baffle, and carry out Thermal Properties without the radome of heat baffle, both thermal behavior comparative results as shown in Figure 3: the internal temperature with the radome of heat baffle is starkly lower than the internal temperature of the radome without heat baffle.This illustrates that heat baffle significantly can improve the heat-proof quality of radome.
Embodiment 2
Based on a kind of FRCMC radome, according to radome electrical property design theory, design radome heat insulation structural thickness, and select low density porous silicon dioxide fibre based composites as thermal shield material, thus prepare the heat baffle of high wave transparent low anchor line error.In heat baffle visible outline and radome, shape line fits like a glove, and the mode fixing by machinery makes heat baffle and radome connect as one, and obtains the radome with heat baffle.Carry out studying about the electrical property such as wave transmission rate and aiming-line error to the radome with heat baffle and the radome without heat baffle respectively, both electrical property comparative results are as shown in Figure 4 and Figure 5: the wave transmission rate with the radome of heat baffle reduces by a small margin, meet performance requriements, and with the radome of heat baffle aiming-line error local subtle change, on the basis realizing excellent thermal insulation performance, electrical property meets the demands.
The present invention is by choose reasonable thermal shield material and structure, being reflected in certain operating frequency range of making to produce between radome and heat baffle cancels each other so that becomes very little, thus reducing on the basis of electrical property not significantly, the thermal behavior of remarkable lifting radome, and keep the electrical properties such as excellent wave transparent and aiming-line error, solve the difficult problem that radome heat-proof quality under hot conditions is not good.
Although content of the present invention has done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple amendment of the present invention and substitute will be all apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (7)
1. one kind possesses the heat baffle of high wave transparent low anchor line error, it is characterized in that, it is inner that this heat baffle (2) is fixed on radome (1), described heat baffle (2) entirety is rotation body structure, the contour structures of this heat baffle (2) and the interior shape entirety of radome conformal, or with the interior shape Local conformal of radome, or in hemispherical dome structure, the Material selec-tion of heat baffle (2) has oxide material or the aerogel based composites of low-k, there is good heat-proof quality, there is high wave penetrate capability and low anchor line error performance simultaneously.
2. possesses the heat baffle of high wave transparent low anchor line error as claimed in claim 1, it is characterized in that, the cover wall construction of described heat baffle (2) adopts the combination of the corrugated structure of porous or the corrugated structure of the sphere curved surface structure of porous or porous and the sphere curved surface structure of porous.
3. possesses the heat baffle of high wave transparent low anchor line error as claimed in claim 1, it is characterized in that, when radome (1) is subject to electromagenetic wave radiation, the contour structures of heat baffle (2) and the interior shape entirety of radome conformal, or heat baffle (2) is in hemispherical dome structure, when radome (1) is not subject to electromagenetic wave radiation, the contour structures of heat baffle (2) and the interior shape Local conformal of radome.
4. possess the heat baffle of high wave transparent low anchor line error as claimed in claim 1, it is characterized in that, the material structure of described heat baffle (2) is any one or more than one the mechanical combination in foam texture, fiber structure or airsetting colloid form structure.
5. possess the heat baffle of high wave transparent low anchor line error as claimed in claim 1, it is characterized in that, described oxide material is any one or more than one the mechanical combination in silicon dioxide, aluminium oxide or siliceous, aluminium derivant.
6. possess the heat baffle of high wave transparent low anchor line error as claimed in claim 1, it is characterized in that, the specific inductance capacity of the material of heat baffle (2) is less than or equal to 10, and loss tangent is less than 0.01.
7. possess the heat baffle of high wave transparent low anchor line error as claimed in claim 1, it is characterized in that, by bonding mode or mechanical connection manner, described heat baffle (2) and radome (1) are connected to one.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510782605.5A CN105253290A (en) | 2015-11-16 | 2015-11-16 | Thermal shield with high wave transparent and low aiming line error |
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| CN201510782605.5A CN105253290A (en) | 2015-11-16 | 2015-11-16 | Thermal shield with high wave transparent and low aiming line error |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106005445A (en) * | 2016-07-27 | 2016-10-12 | 中国航空工业集团公司西安飞机设计研究所 | Engine structure and airplane with same |
| CN106347637A (en) * | 2016-09-29 | 2017-01-25 | 湖北航天技术研究院总体设计所 | Heat protection and diversion integrated device of attitude control nozzle in high-Mach environment |
| CN107434421A (en) * | 2017-08-10 | 2017-12-05 | 航天特种材料及工艺技术研究所 | It is a kind of that there is wave transparent, heat-insulated and load-carrying properties antenna window member and preparation method thereof |
| CN109449591A (en) * | 2018-10-25 | 2019-03-08 | 湖北航天技术研究院总体设计所 | Active radar and passive radar seeker antenna cover and aircraft |
| CN111043450A (en) * | 2019-12-19 | 2020-04-21 | 航天特种材料及工艺技术研究所 | Wave-transparent heat-insulation gas-barrier member and preparation method thereof |
| JP7446915B2 (en) | 2020-05-25 | 2024-03-11 | 三菱重工業株式会社 | Rectification structure, flying object and spacecraft |
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| US6091375A (en) * | 1996-06-25 | 2000-07-18 | Sumitomo Electric Industries, Ltd. | Radome |
| CN102531521A (en) * | 2012-02-21 | 2012-07-04 | 湖北三江航天江北机械工程有限公司 | Method for preparing wave-transmission SiO2 aerogel heat-insulation composite material by using normal-pressure drying equipment |
| CN103723269A (en) * | 2013-09-11 | 2014-04-16 | 太仓派欧技术咨询服务有限公司 | Thermal protection structure |
| US20140299712A1 (en) * | 2009-12-01 | 2014-10-09 | The Boeing Company | Thermal Barrier Coated RF Radomes |
| CN105015759A (en) * | 2015-07-17 | 2015-11-04 | 北京航天长征飞行器研究所 | Combined wave-transparent hood with functional regions of high-speed aircraft |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US6091375A (en) * | 1996-06-25 | 2000-07-18 | Sumitomo Electric Industries, Ltd. | Radome |
| US20140299712A1 (en) * | 2009-12-01 | 2014-10-09 | The Boeing Company | Thermal Barrier Coated RF Radomes |
| CN102531521A (en) * | 2012-02-21 | 2012-07-04 | 湖北三江航天江北机械工程有限公司 | Method for preparing wave-transmission SiO2 aerogel heat-insulation composite material by using normal-pressure drying equipment |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106005445A (en) * | 2016-07-27 | 2016-10-12 | 中国航空工业集团公司西安飞机设计研究所 | Engine structure and airplane with same |
| CN106347637A (en) * | 2016-09-29 | 2017-01-25 | 湖北航天技术研究院总体设计所 | Heat protection and diversion integrated device of attitude control nozzle in high-Mach environment |
| CN106347637B (en) * | 2016-09-29 | 2018-09-07 | 湖北航天技术研究院总体设计所 | The anti-thermally induced flow integrated apparatus of attitude control jet pipe under a kind of high Mach environment |
| CN107434421A (en) * | 2017-08-10 | 2017-12-05 | 航天特种材料及工艺技术研究所 | It is a kind of that there is wave transparent, heat-insulated and load-carrying properties antenna window member and preparation method thereof |
| CN107434421B (en) * | 2017-08-10 | 2019-12-10 | 航天特种材料及工艺技术研究所 | antenna window component with wave-transmitting, heat-insulating and bearing performances and preparation method thereof |
| CN109449591A (en) * | 2018-10-25 | 2019-03-08 | 湖北航天技术研究院总体设计所 | Active radar and passive radar seeker antenna cover and aircraft |
| CN111043450A (en) * | 2019-12-19 | 2020-04-21 | 航天特种材料及工艺技术研究所 | Wave-transparent heat-insulation gas-barrier member and preparation method thereof |
| CN111043450B (en) * | 2019-12-19 | 2021-09-24 | 航天特种材料及工艺技术研究所 | Wave-transparent heat-insulation gas-barrier member and preparation method thereof |
| JP7446915B2 (en) | 2020-05-25 | 2024-03-11 | 三菱重工業株式会社 | Rectification structure, flying object and spacecraft |
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Application publication date: 20160120 |