CN117727504A - Ultra-light ultra-flexible high-low temperature-resistant radiation-resistant low-loss cable for spaceflight and processing technology - Google Patents
Ultra-light ultra-flexible high-low temperature-resistant radiation-resistant low-loss cable for spaceflight and processing technology Download PDFInfo
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- 239000004020 conductor Substances 0.000 claims abstract description 164
- 239000012784 inorganic fiber Substances 0.000 claims abstract description 89
- 229920006231 aramid fiber Polymers 0.000 claims abstract description 53
- 229920001721 polyimide Polymers 0.000 claims abstract description 47
- 239000004964 aerogel Substances 0.000 claims abstract description 39
- 238000009941 weaving Methods 0.000 claims abstract description 38
- 239000004696 Poly ether ether ketone Substances 0.000 claims abstract description 16
- 229920002530 polyetherether ketone Polymers 0.000 claims abstract description 16
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 13
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- 229910052751 metal Inorganic materials 0.000 claims description 64
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 44
- 239000012792 core layer Substances 0.000 claims description 33
- 239000000377 silicon dioxide Substances 0.000 claims description 24
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 19
- 229910052802 copper Inorganic materials 0.000 claims description 19
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- 239000004642 Polyimide Substances 0.000 claims description 11
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- 238000005253 cladding Methods 0.000 claims description 8
- 238000003980 solgel method Methods 0.000 claims description 8
- 229910052759 nickel Inorganic materials 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
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- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 6
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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Abstract
The invention discloses an ultra-light ultra-flexible high-low temperature radiation-resistant low-loss cable for spaceflight and a processing technology thereof, wherein the cable comprises an inner conductor layer, an insulating layer, a wrapping outer conductor layer, a woven outer conductor layer and a sheath layer which are sequentially arranged from inside to outside, the inner conductor layer is formed by twisting a plurality of strands of metallized inorganic fibers, the insulating layer is an aerogel microporous polyimide film coated on the outer side of the inner conductor layer, the wrapping outer conductor layer is a silver-plated copper-clad aluminum flat belt wrapped on the outer side of the insulating layer, the woven outer conductor layer is a metallized inorganic fiber woven layer or a metallized aramid fiber woven layer coated on the outer side of the wrapping outer conductor layer, the metallized inorganic fiber woven layer is formed by weaving a plurality of strands of metallized inorganic fibers, and the sheath layer is a polyether-ether-ketone sheath layer coated on the outer side of the woven outer conductor layer. The cable can be suitable for complex and harsh aerospace environments such as high and low temperature, strong radiation and the like, and can reduce loss, improve flexibility and lighten weight.
Description
Technical Field
The invention belongs to the technical field of wires and cables, and particularly relates to an ultra-light ultra-flexible high-low temperature-resistant radiation-resistant low-loss cable for spaceflight and a processing technology.
Background
With the high-speed development of aerospace industry in China, the requirements of the aerospace environment on coaxial cables are higher and higher, the requirements of the cables on electrical performance, such as high transmission power, high use frequency, small voltage standing wave ratio, low loss and the like, are met, the requirements of space aerospace performances such as high and low temperature resistance, flame retardance, low vacuum air release, radiation resistance and the like are met, and meanwhile, certain requirements on flexibility, volume and weight of the cables are met in order to facilitate cable installation and increase effective load space.
The structure of the radio frequency coaxial cable generally comprises an inner conductor layer, an insulating layer, a metal shielding layer and a sheath layer, wherein the inner conductor layer and the metal shielding layer in the radio frequency coaxial cable are mainly made of silver-plated copper materials, and the radio frequency coaxial cable is relatively high in conductivity but relatively heavy in weight.
Disclosure of Invention
In view of the defects in the prior art, the invention provides the ultra-light ultra-flexible high-low temperature-resistant radiation-resistant low-loss cable for spaceflight and the processing technology thereof, and the cable not only can adapt to complex and harsh spaceflight environments such as high and low temperature, strong radiation and the like, but also can reduce loss, improve flexibility and lighten weight.
The technical scheme adopted for solving the technical problems is as follows:
the utility model provides an ultralight is ultra-soft high low temperature resistant low loss cable of nai radiation for space flight, includes from inside to outside inner conductor layer, insulating layer that sets gradually, around package outer conductor layer, weave outer conductor layer and restrictive coating, the inner conductor layer is stranded by stranded metallized inorganic fiber and forms, the insulating layer is the aerogel micropore polyimide film of cladding in the inner conductor layer outside, around package outer conductor layer is the silver-plated copper cladding aluminium ribbon around wrapping in the insulating layer outside, weave outer conductor layer for cladding in around the metallized inorganic fiber weaving layer or the metallized aramid fiber weaving layer in the package outer conductor layer outside, metallized inorganic fiber weaving layer is woven by stranded metallized inorganic fiber and is formed, metallized aramid fiber weaving layer is woven by stranded metallized aramid fiber, the restrictive coating is the polyether ether ketone restrictive coating of cladding in the outside of weaving outer conductor layer.
Further, the axes of the inner conductor layer, the insulating layer, the wrapping outer conductor layer, the woven outer conductor layer and the sheath layer coincide.
Further, the metallized inorganic fiber comprises an inorganic fiber core layer, wherein the outer side of the inorganic fiber core layer is plated with a first conductive metal and forms a first metal outer layer, and the first conductive metal is one or more of copper, nickel and silver; the metallized aramid fiber comprises an aramid fiber core layer, wherein the outer side of the aramid fiber core layer is plated with second conductive metal and forms a second metal outer layer, and the second conductive metal is one or more of copper, nickel and silver.
Further, the inorganic fibers of the inorganic fiber core layer are carbon fibers or carbon nanotube fibers, and the model of the carbon fibers is 250D; the model of the aramid fiber core layer is 400D; the thickness of the first metal outer layer and the second metal outer layer is controlled to be 3-10 mu m.
Further, the aerogel type microporous polyimide film is prepared from 2-8wt% of nano silica aerogel and 92-98wt% of microporous polyimide.
Further, the pore diameter of micropores in the aerogel microporous polyimide film is controlled to be 20-120nm.
Further, the lapping coverage rate of the lapping outer conductor layer is controlled to be 45-48%, and the braiding density of the braiding outer conductor layer is more than or equal to 90%.
Further, the diameter of the inner conductor layer is controlled to be 0.5-2.3mm, the outer diameter of the insulating layer is controlled to be 0.8-6.3mm, the outer diameter of the wrapping outer conductor layer is controlled to be 1-7.2mm, the outer diameter of the woven outer conductor layer is controlled to be 1.2-8mm, and the outer diameter of the sheath layer is controlled to be 1.4-8.4mm.
The processing technology of the ultra-light ultra-flexible high-low temperature radiation-resistant low-loss cable for spaceflight is used for processing the ultra-light ultra-flexible high-low temperature radiation-resistant low-loss cable for spaceflight, and comprises the following steps of:
s1, stranding a plurality of strands of the metallized inorganic fibers to form an inner conductor layer, and coating an aerogel type microporous polyimide film on the outer side of the inner conductor layer to form the insulating layer;
s2, wrapping the outer side of the insulating layer by adopting a silver-plated copper-clad aluminum flat belt to form the wrapped outer conductor layer;
s3, weaving a plurality of strands of the metallized inorganic fibers to form a metallized inorganic fiber weaving layer, or weaving a plurality of strands of the metallized aramid fibers to form a metallized aramid fiber weaving layer, and wrapping the metallized inorganic fiber weaving layer or the metallized aramid fiber weaving layer outside the wrapping outer conductor layer to form the woven outer conductor layer;
s4, coating a sheath layer made of polyether-ether-ketone on the outer side of the braided outer conductor layer.
Further, the method comprises the steps of,
in step S1:
the aerogel type microporous polyimide film is prepared by mixing 2-8wt% of nano silicon dioxide aerogel and 92-98wt% of microporous polyimide, preparing a polyimide-silicon dioxide mixture film by a sol-gel method, and removing silicon dioxide dispersed in the polyimide-silicon dioxide mixture film by hydrofluoric acid to prepare the aerogel type microporous polyimide film;
in step S3:
the metallized inorganic fiber is manufactured by plating a first conductive metal outside the inorganic fiber core layer and forming a first metal outer layer so as to manufacture the metallized inorganic fiber;
the metallized aramid fiber is manufactured by plating a second conductive metal on the outer side of the aramid fiber core layer and forming a second metal outer layer.
Compared with the prior art, the invention has the beneficial effects that:
the ultra-light ultra-flexible high-low temperature resistant radiation resistant low-loss cable for spaceflight is formed by twisting a plurality of strands of metallized inorganic fibers, wherein the density of the metallized inorganic fibers is 3.5g/cm 3 The inner conductor layer in the common cable is mostly made of silver-plated copper material, wherein the density of silver-plated copper is 8.89g/cm 3 The inner conductor layer in the cable is at least reduced by more than 50% in weight with the inner conductor layer in the common cable under the same size, and the inner conductor layer in the cable has the advantages of high tensile strength, good flexibility and higher high and low temperature resistance, wherein the high temperature resistance is more than 1000 ℃, and the low temperature resistance is-180 ℃, so that the prepared cable has the advantages of light weight, good flexibility, high tensile strength and good heat resistance; because the insulating layer is the aerogel type microporous polyimide film coated on the outer side of the inner conductor layer, the dielectric loss and dielectric constant of the insulating layer can be reduced, the transmission performance of the prepared cable can be obviously improved, particularly the attenuation constant of the cable is reduced, the transmission distance and transmission rate of the cable are improved, the service frequency of the cable is prolonged, and the aerogel type microporous polyimide filmThe cable is required to be heated and softened in the process of being coated on the outer side of the inner conductor layer, so that shrinkage deformation can occur, the outer diameter of the manufactured cable can be reduced, in addition, the number of micropores in the aerogel microporous polyimide film is large, the weight of the manufactured cable can be reduced, the flexibility of the aerogel microporous polyimide film is good, the cable is more resistant to radiation in the face of a complex and severe aerospace environment, the cable taking the aerogel microporous polyimide film as an insulating layer can resist radiation dose of more than 1000Mrad, and is more resistant to high and low temperatures, the high temperature resistance is 400 ℃, and the low temperature resistance is-269 ℃; because the wrapping outer conductor layer is a silver-plated copper-clad aluminum flat belt wrapped on the outer side of the insulating layer, the density of the silver-plated copper-clad aluminum flat belt is 4.05g/cm 3 The unit weight of the manufactured cable can be made lighter under the condition of achieving the same shielding efficiency; the outer braided conductor layer is a metallized inorganic fiber braided layer or a metallized aramid fiber braided layer which is coated on the outer side of the outer braided conductor layer, the metallized inorganic fiber braided layer is formed by braiding a plurality of strands of metallized inorganic fibers, the metallized aramid fiber braided layer is formed by braiding a plurality of strands of metallized aramid fibers, and the metal shielding layer in the common cable is mostly made of silver-plated copper braided materials, so that the weight of the outer braided conductor layer in the cable is reduced by at least more than 50% compared with that of the metal shielding layer in the common cable, and in addition, the metallized inorganic fibers and the metallized aramid fibers have excellent performances of ultrahigh tensile strength, high and low temperature resistance and light weight; in the invention, the wrapping outer conductor layer and the braiding outer conductor layer are combined and shielded, and the insulating layer inside the prepared cable is sufficiently mechanically protected and electromagnetically shielded; as the sheath layer is made of polyether-ether-ketone material, the sheath layer has higher mechanical strength, good high-low temperature resistance, stronger chemical corrosion resistance and high flame retardance, in addition, the insulating property of the sheath layer is better in a very wide temperature range and high frequency, the sheath layer has good protection property for cables, can be used for a long time in a wide temperature range of-180-260 ℃, has excellent long-term creep resistance and fatigue resistance at high temperature, and the sheath layer in a common cable is generally made of polytetrafluoroethylene material, and has better radiation resistance compared with polytetrafluoroethyleneThe irradiation resistant dose reaches more than 1000Mrad, in addition, the minimum thickness of the polyether-ether-ketone can reach 0.05mm when the polyether-ether-ketone is extruded, and the density of the polyether-ether-ketone is 1.30g/cm 3 The density of the polyether-ether-ketone is smaller, so that the outer diameter of the prepared cable is smaller and the weight of the prepared cable is lighter, and the weight of the sheath layer in the cable is reduced by about 40% under the condition that the sheath layer in the cable is the same as that of the sheath layer in a common cable.
In conclusion, the cable has the advantages of high propagation frequency, high propagation speed, low loss, high shielding efficiency, good high and low temperature resistance, good radiation resistance, good flexibility and light weight, and compared with a common cable which adopts silver-plated copper material as an inner conductor layer and an outer conductor layer, the cable has the weight reduced by more than 40 percent, is mainly used for signal transmission application occasions of a communication system of spaceflight equipment, and is particularly suitable for out-of-cabin equipment and systems with severe requirements on high and low temperature resistance, radiation resistance and weight of coaxial cables.
Drawings
Fig. 1 is a schematic cross-sectional structure of an ultra-light ultra-flexible high-low temperature-resistant radiation-resistant low-loss cable for spaceflight.
The reference numerals in the drawings illustrate: 1. an inner conductor layer 2, an insulating layer 3, a wrapping outer conductor layer 4, a braiding outer conductor layer 5 and a sheath layer.
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and are not intended to be limiting.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1, the ultra-light ultra-flexible high-low temperature radiation-resistant low-loss cable for spaceflight comprises an inner conductor layer 1, an insulating layer 2, a wrapping outer conductor layer 3, a woven outer conductor layer 4 and a sheath layer 5 which are sequentially arranged from inside to outside, wherein the axes of the inner conductor layer 1, the insulating layer 2, the wrapping outer conductor layer 3, the woven outer conductor layer 4 and the sheath layer 5 are overlapped, the inner conductor layer 1 is formed by stranding a plurality of strands of metallized inorganic fibers, the insulating layer 2 is an aerogel microporous polyimide film coated on the outer side of the inner conductor layer 1, the wrapping outer conductor layer 3 is a silver-plated copper-clad aluminum flat belt wrapped on the outer side of the insulating layer 2, the woven outer conductor layer 4 is a metallized inorganic fiber woven layer or a metallized aramid fiber woven layer coated on the outer side of the wrapping outer conductor layer 3, the metallized inorganic fiber woven layer is formed by weaving a plurality of strands of metallized inorganic fibers, the metallized aramid fiber woven layer is formed by weaving a plurality of strands of metallized aramid fibers, and the sheath layer 5 is a polyether ether ketone sheath layer 5 coated on the outer side of the woven outer conductor layer 4.
The inner conductor layer 1 has skin effect when transmitting high-frequency signals, the higher the frequency is, the more the signal transmission is close to the surface layer of the inner conductor layer 1, the inner conductor layer 1 is formed by twisting a plurality of strands of metallized inorganic fibers, the metallized inorganic fibers comprise an inorganic fiber core layer, the outer side of the inorganic fiber core layer is plated with first conductive metal and forms a first metal outer layer, thus, the surface metallization of the inorganic fibers is adopted to reduce the resistance, and the aim of weight reduction is realized; wherein the inorganic fibers of the inorganic fiber core layer are carbon fibers or carbon nanotube fibers, the model of the carbon fibers is 250D, the first conductive metal is one or more of copper, nickel and silver, the thickness of the first metal outer layer is controlled to be 3-10 mu m, and the diameter of the inner conductor layer 1 is controlled to be 0.5-2.3mm.
The aerogel type microporous polyimide film of the insulating layer 2 is prepared by mixing 2-8wt% of nano silica aerogel and 92-98wt% of microporous polyimide, preparing a polyimide-silica mixture film by a sol-gel method, and removing silica dispersed in the polyimide-silica mixture film by hydrofluoric acid to obtain the aerogel type microporous polyimide film, wherein the pore diameter of micropores in the aerogel type microporous polyimide film is controlled to be 20-120nm, and the outer diameter of the insulating layer 2 is controlled to be 0.8-6.3mm.
Wherein, the lapping coverage rate of the lapping outer conductor layer 3 is controlled to be 45-48%, and the outer diameter of the lapping outer conductor layer 3 is controlled to be 1-7.2mm.
Wherein, when the woven outer conductor layer 4 is a woven layer of metallized inorganic fibers, the metallized inorganic fibers in the woven layer of metallized inorganic fibers comprise an inorganic fiber core layer, the outer side of the inorganic fiber core layer is plated with a first conductive metal and forms a first metal outer layer, wherein the inorganic fibers of the inorganic fiber core layer are carbon fibers or carbon nanotube fibers, wherein the model of the carbon fibers is 250D, wherein the first conductive metal is one or more of copper, nickel and silver, wherein the thickness of the first metal outer layer is controlled to be 3-10 mu m; when the woven outer conductor layer 4 is a metallized aramid fiber woven layer, the metallized aramid fibers in the metallized aramid fiber woven layer comprise an aramid fiber core layer, the outer side of the aramid fiber core layer is plated with a second conductive metal and forms a second metal outer layer, wherein the aramid fiber of the aramid fiber core layer has a model number of 400D, the second conductive metal is one or more of copper, nickel and silver, and the thickness of the second metal outer layer is controlled to be 3-10 mu m; wherein the braiding density of the braiding outer conductor layer 4 is more than or equal to 90%, and the outer diameter of the braiding outer conductor layer 4 is controlled to be 1.2-8mm.
Wherein the outer diameter of the sheath layer 5 is controlled to be 1.4-8.4mm.
The processing technology of the ultra-light ultra-flexible high-low temperature radiation-resistant low-loss cable for spaceflight is used for processing the ultra-light ultra-flexible high-low temperature radiation-resistant low-loss cable for spaceflight, and comprises the following steps of:
s1, twisting a plurality of strands of metallized inorganic fibers to form an inner conductor layer 1, and coating an aerogel type microporous polyimide film on the outer side of the inner conductor layer 1 to form an insulating layer 2, wherein the aerogel type microporous polyimide film is prepared by mixing 2-8wt% of nano silica aerogel and 92-98wt% of microporous polyimide, preparing a polyimide-silica mixture film by a sol-gel method, and removing silica dispersed in the polyimide-silica mixture film by hydrofluoric acid to prepare the aerogel type microporous polyimide film;
s2, wrapping the outer side of the insulating layer 2 by adopting a silver-plated copper-clad aluminum flat belt to form a wrapped outer conductor layer 3;
s3, weaving a plurality of strands of metallized inorganic fibers to form a metallized inorganic fiber weaving layer, or weaving a plurality of strands of metallized aramid fibers to form a metallized aramid fiber weaving layer, and wrapping the metallized inorganic fiber weaving layer or the metallized aramid fiber weaving layer outside the wrapping outer conductor layer 3 to form a woven outer conductor layer 4; the metallized inorganic fiber is prepared by plating a first conductive metal outside the inorganic fiber core layer and forming a first metal outer layer to prepare the metallized inorganic fiber; the metallized aramid fiber is prepared by plating a second conductive metal on the outer side of an aramid fiber core layer and forming a second metal outer layer;
s4, coating a sheath layer 5 made of polyether-ether-ketone on the outer side of the braided outer conductor layer 4.
Example 1
A processing technology of an ultra-light ultra-flexible high-low temperature resistant radiation resistant low-loss cable for spaceflight comprises the following steps:
s1, twisting a plurality of strands of metallized inorganic fibers to form an inner conductor layer 1, and coating an aerogel type microporous polyimide film on the outer side of the inner conductor layer 1 to form an insulating layer 2; wherein the inorganic fiber core layer in the metallized inorganic fiber is carbon fiber, the first metal outer layer is silver, the thickness of the first metal outer layer is 3 mu m, and the diameter of the inner conductor layer 1 is 0.91mm; wherein the aerogel type microporous polyimide film is prepared by mixing 3wt% of nano silica aerogel and 97wt% of microporous polyimide, preparing a polyimide-silica mixture film by a sol-gel method, and removing silica dispersed in the polyimide-silica mixture film by hydrofluoric acid to prepare an aerogel type microporous polyimide film, wherein the outer diameter of the insulating layer 2 is 2.7mm;
s2, wrapping the outer side of the insulating layer 2 by adopting a silver-plated copper-clad aluminum flat belt to form a wrapped outer conductor layer 3; wherein the wrapping coverage rate of the wrapping outer conductor layer 3 is 46%, and the outer diameter of the wrapping outer conductor layer 3 is 2.92mm;
s3, weaving a plurality of strands of metallized inorganic fibers to form a metallized inorganic fiber woven layer, and wrapping the metallized inorganic fiber woven layer outside the wrapping outer conductor layer 3 to form a woven outer conductor layer 4; wherein the inorganic fiber core layer in the metallized inorganic fiber is carbon fiber, the model of the carbon fiber is 250D, the first metal outer layer is silver, and the thickness of the first metal outer layer is 3 mu m; wherein the braiding density of the braided outer conductor layer 4 is 90% or more, and the outer diameter of the braided outer conductor layer 4 is 3.15mm;
s4, wrapping a sheath layer 5 made of polyether-ether-ketone on the outer side of the braided outer conductor layer 4, wherein the outer diameter of the sheath layer 5 is 3.45mm, so that the ultra-light ultra-flexible high-low temperature radiation-resistant low-loss cable for spaceflight is manufactured, and the axes of the inner conductor layer 1, the insulating layer 2, the wrapping outer conductor layer 3, the braided outer conductor layer 4 and the sheath layer 5 are coincident.
The ultra-light ultra-flexible high-low temperature radiation-resistant low-loss cable prepared in example 1 was subjected to performance test, and the main performance parameters are shown in table 1, wherein the weight of the cable with the outer diameter of 3.45mm is only 18.65kg/km, and compared with a common cable with the outer diameter of 3.45mm and adopting silver-plated copper material as the inner conductor layer 1 and the metal shielding layer, the weight is reduced by 42%.
TABLE 1
Example 2
A processing technology of an ultra-light ultra-flexible high-low temperature resistant radiation resistant low-loss cable for spaceflight comprises the following steps:
s1, twisting a plurality of strands of metallized inorganic fibers to form an inner conductor layer 1, and coating an aerogel type microporous polyimide film on the outer side of the inner conductor layer 1 to form an insulating layer 2; wherein the inorganic fiber core layer in the metallized inorganic fiber is carbon fiber, the first metal outer layer is silver, the thickness of the first metal outer layer is 3 mu m, and the diameter of the inner conductor layer 1 is 0.91mm; the aerogel type microporous polyimide film is prepared by mixing 5wt% of nano silica aerogel and 95wt% of microporous polyimide, preparing a polyimide-silica mixture film by a sol-gel method, and removing silica dispersed in the polyimide-silica mixture film by hydrofluoric acid to prepare the aerogel type microporous polyimide film, wherein the outer diameter of the insulating layer 2 is 2.68mm;
s2, wrapping the outer side of the insulating layer 2 by adopting a silver-plated copper-clad aluminum flat belt to form a wrapped outer conductor layer 3; wherein the wrapping coverage rate of the wrapping outer conductor layer 3 is 47%, and the outer diameter of the wrapping outer conductor layer 3 is 2.9mm;
s3, weaving a plurality of strands of metallized aramid fibers to form a metallized aramid fiber weaving layer, and wrapping the metallized aramid fiber weaving layer outside the wrapping outer conductor layer 3 to form a woven outer conductor layer 4; wherein the model of the aramid fiber in the metallized aramid fiber is 400D, the second metal outer layer is silver, and the thickness of the second metal outer layer is 3 mu m; wherein the braiding density of the braided outer conductor layer 4 is 90% or more, and the outer diameter of the braided outer conductor layer 4 is 3.11mm;
s4, wrapping a sheath layer 5 made of polyether-ether-ketone on the outer side of the braided outer conductor layer 4, wherein the outer diameter of the sheath layer 5 is 3.41mm, so that the ultra-light ultra-flexible high-temperature-resistant radiation-resistant low-loss cable for spaceflight is manufactured, and the axes of the inner conductor layer 1, the insulating layer 2, the wrapping outer conductor layer 3, the braided outer conductor layer 4 and the sheath layer 5 are coincident.
The ultra-light ultra-flexible high-low temperature radiation-resistant low-loss cable prepared in example 2 was subjected to performance test, and the main performance parameters are shown in table 2, wherein the weight of the cable with the outer diameter of 3.41mm is only 18.58kg/km, and compared with a common cable with the outer diameter of 3.41mm and adopting silver-plated copper material as the inner conductor layer 1 and the metal shielding layer, the weight is reduced by 43%.
TABLE 2
Example 3
A processing technology of an ultra-light ultra-flexible high-low temperature resistant radiation resistant low-loss cable for spaceflight comprises the following steps:
s1, twisting a plurality of strands of metallized inorganic fibers to form an inner conductor layer 1, and coating an aerogel type microporous polyimide film on the outer side of the inner conductor layer 1 to form an insulating layer 2; wherein the inorganic fiber core layer in the metallized inorganic fiber is carbon nano tube fiber, the first metal outer layer is silver, the thickness of the first metal outer layer is 4 mu m, and the diameter of the inner conductor layer 1 is 1.45mm; wherein the aerogel type microporous polyimide film is prepared by mixing 6wt% of nano silica aerogel and 94wt% of microporous polyimide, preparing a polyimide-silica mixture film by a sol-gel method, and removing silica dispersed in the polyimide-silica mixture film by hydrofluoric acid to prepare an aerogel type microporous polyimide film, wherein the outer diameter of the insulating layer 2 is 3.45mm;
s2, wrapping the outer side of the insulating layer 2 by adopting a silver-plated copper-clad aluminum flat belt to form a wrapped outer conductor layer 3; wherein the wrapping coverage rate of the wrapping outer conductor layer 3 is 46%, and the outer diameter of the wrapping outer conductor layer 3 is 3.68mm;
s3, weaving a plurality of strands of metallized inorganic fibers to form a metallized inorganic fiber woven layer, and wrapping the metallized inorganic fiber woven layer outside the wrapping outer conductor layer 3 to form a woven outer conductor layer 4; wherein the inorganic fiber core layer in the metallized inorganic fiber is carbon fiber, the model of the carbon fiber is 250D, the first metal outer layer is silver, and the thickness of the first metal outer layer is 6 mu m; wherein the braiding density of the braided outer conductor layer 4 is 90% or more, and the outer diameter of the braided outer conductor layer 4 is 4.02mm;
s4, wrapping a sheath layer 5 made of polyether-ether-ketone on the outer side of the braided outer conductor layer 4, wherein the outer diameter of the sheath layer 5 is 4.45mm, so as to prepare the ultra-light ultra-flexible high-low temperature radiation-resistant low-loss cable for spaceflight, and the axes of the inner conductor layer 1, the insulating layer 2, the wrapping outer conductor layer 3, the braided outer conductor layer 4 and the sheath layer 5 are coincident.
The ultra-light ultra-flexible high-low temperature radiation-resistant low-loss cable prepared in example 3 was subjected to performance test, and the main performance parameters are shown in table 3, wherein the weight of the cable with the outer diameter of 4.45mm is only 28.36kg/km, and compared with the common cable with the outer diameter of 4.45mm and adopting silver-plated copper material as the inner conductor layer 1 and the metal shielding layer, the weight is reduced by 44%.
TABLE 3 Table 3
Example 4
A processing technology of an ultra-light ultra-flexible high-low temperature resistant radiation resistant low-loss cable for spaceflight comprises the following steps:
s1, twisting a plurality of strands of metallized inorganic fibers to form an inner conductor layer 1, and coating an aerogel type microporous polyimide film on the outer side of the inner conductor layer 1 to form an insulating layer 2; wherein the inorganic fiber core layer in the metallized inorganic fiber is carbon nano tube fiber, the first metal outer layer is silver, the thickness of the first metal outer layer is 4 mu m, and the diameter of the inner conductor layer 1 is 1.45mm; wherein the aerogel type microporous polyimide film is prepared by mixing 8wt% of nano silica aerogel and 92wt% of microporous polyimide, preparing a polyimide-silica mixture film by a sol-gel method, and removing silica dispersed in the polyimide-silica mixture film by hydrofluoric acid to prepare an aerogel type microporous polyimide film, wherein the outer diameter of the insulating layer 2 is 3.42mm;
s2, wrapping the outer side of the insulating layer 2 by adopting a silver-plated copper-clad aluminum flat belt to form a wrapped outer conductor layer 3; wherein the wrapping coverage rate of the wrapping outer conductor layer 3 is 47%, and the outer diameter of the wrapping outer conductor layer 3 is 3.63mm;
s3, weaving a plurality of strands of metallized aramid fibers to form a metallized aramid fiber weaving layer, and wrapping the metallized aramid fiber weaving layer outside the wrapping outer conductor layer 3 to form a woven outer conductor layer 4; wherein the model of the aramid fiber in the metallized aramid fiber is 400D, the second metal outer layer is silver, and the thickness of the second metal outer layer is 6 mu m; wherein the braiding density of the braided outer conductor layer 4 is 90% or more, and the outer diameter of the braided outer conductor layer 4 is 4mm;
s4, coating a sheath layer 5 made of polyether-ether-ketone on the outer side of the braided outer conductor layer 4, wherein the outer diameter of the sheath layer 5 is 4.4mm, so as to prepare the ultra-light ultra-flexible high-low temperature radiation-resistant low-loss cable for spaceflight, and the axes of the inner conductor layer 1, the insulating layer 2, the wrapping outer conductor layer 3, the braided outer conductor layer 4 and the sheath layer 5 are coincident.
The ultra-light ultra-flexible high-low temperature radiation-resistant low-loss cable prepared in example 2 was subjected to performance test, and the main performance parameters are shown in table 4, wherein the weight of the cable with the outer diameter of 4.4mm is only 28.02kg/km, and compared with a common cable with the outer diameter of 4.4mm and adopting silver-plated copper material as the inner conductor layer 1 and the metal shielding layer, the weight is reduced by 45%.
TABLE 4 Table 4
In conclusion, the cable has the advantages of high propagation frequency, high propagation speed, low loss, high shielding efficiency, good high and low temperature resistance, good radiation resistance, good flexibility and light weight, and compared with a common cable adopting silver-plated copper materials as the inner conductor layer 1 and the outer conductor layer, the cable has the weight reduced by more than 40%.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.
Claims (10)
1. An ultra-light ultra-flexible high-low temperature resistant radiation resistant low-loss cable for spaceflight, which is characterized in that: including inner conductor layer (1), insulating layer (2), package outer conductor layer (3), weave outer conductor layer (4) and restrictive coating (5) that set gradually from inside to outside, inner conductor layer (1) is formed by stranded metallized inorganic fiber transposition, insulating layer (2) are cladding in aerogel micropore polyimide film in inner conductor layer (1) outside, package outer conductor layer (3) are the silver-plated copper cladding aluminium ribbon around the package in insulating layer (2) outside, weave outer conductor layer (4) for cladding in the metallized inorganic fiber weaving layer or the metallized aramid fiber weaving layer around package outer conductor layer (3) outside, metallized inorganic fiber weaving layer is woven by stranded metallized inorganic fiber and is formed by stranded metallized aramid fiber, restrictive coating (5) are cladding in polyether ether ketone restrictive coating (5) in the outside of weaving outer conductor layer (4).
2. The ultra-light ultra-flexible high-low temperature radiation-resistant low-loss cable for aerospace according to claim 1, wherein the cable comprises the following components: the inner conductor layer (1), the insulating layer (2), the wrapping outer conductor layer (3), the braiding outer conductor layer (4) and the sheath layer (5) are overlapped.
3. The ultra-light ultra-flexible high-low temperature radiation-resistant low-loss cable for aerospace according to claim 2, wherein the cable comprises the following components: the metallized inorganic fiber comprises an inorganic fiber core layer, wherein the outer side of the inorganic fiber core layer is plated with a first conductive metal and forms a first metal outer layer, and the first conductive metal is one or more of copper, nickel and silver; the metallized aramid fiber comprises an aramid fiber core layer, wherein the outer side of the aramid fiber core layer is plated with second conductive metal and forms a second metal outer layer, and the second conductive metal is one or more of copper, nickel and silver.
4. The ultra-light ultra-flexible high-low temperature radiation-resistant low-loss cable for aerospace according to claim 3, wherein the cable comprises the following components: the inorganic fibers of the inorganic fiber core layer are carbon fibers or carbon nanotube fibers, and the model of the carbon fibers is 250D; the model of the aramid fiber core layer is 400D; the thickness of the first metal outer layer and the second metal outer layer is controlled to be 3-10 mu m.
5. The ultra-light ultra-flexible high-low temperature radiation-resistant low-loss cable for aerospace according to claim 2, wherein the cable comprises the following components: the aerogel type microporous polyimide film is prepared from 2-8wt% of nano silica aerogel and 92-98wt% of microporous polyimide.
6. The ultra-light ultra-flexible high-low temperature radiation-resistant low-loss cable for aerospace according to claim 5, wherein the cable comprises the following components: the pore diameter of micropores in the aerogel microporous polyimide film is controlled to be 20-120nm.
7. The ultra-light ultra-flexible high-low temperature radiation-resistant low-loss cable for aerospace according to claim 2, wherein the cable comprises the following components: the wrapping covering rate of the wrapping outer conductor layer (3) is controlled to be 45-48%, and the braiding density of the braiding outer conductor layer (4) is more than or equal to 90%.
8. The ultra-light ultra-flexible high-low temperature radiation-resistant low-loss cable for aerospace according to claim 2, wherein the cable comprises the following components: the diameter of the inner conductor layer (1) is controlled to be 0.5-2.3mm, the outer diameter of the insulating layer (2) is controlled to be 0.8-6.3mm, the outer diameter of the wrapping outer conductor layer (3) is controlled to be 1-7.2mm, the outer diameter of the braiding outer conductor layer (4) is controlled to be 1.2-8mm, and the outer diameter of the sheath layer (5) is controlled to be 1.4-8.4mm.
9. A processing technology of an ultra-light ultra-flexible high-low temperature radiation-resistant low-loss cable for spaceflight, which is used for processing the ultra-light ultra-flexible high-low temperature radiation-resistant low-loss cable for spaceflight according to any one of claims 2-8, and is characterized by comprising the following steps:
s1, stranding a plurality of strands of the metallized inorganic fibers to form an inner conductor layer (1), and coating an aerogel microporous polyimide film on the outer side of the inner conductor layer (1) to form an insulating layer (2);
s2, wrapping the outer side of the insulating layer (2) by adopting a silver-plated copper-clad aluminum flat belt to form a wrapped outer conductor layer (3);
s3, weaving a plurality of strands of the metallized inorganic fibers to form a metallized inorganic fiber weaving layer, or weaving a plurality of strands of the metallized aramid fibers to form a metallized aramid fiber weaving layer, and wrapping the metallized inorganic fiber weaving layer or the metallized aramid fiber weaving layer outside the wrapping outer conductor layer (3) to form a woven outer conductor layer (4);
s4, coating a sheath layer (5) made of polyether-ether-ketone on the outer side of the braided outer conductor layer (4).
10. The processing technology of the ultra-light ultra-flexible high-low temperature-resistant radiation-resistant low-loss cable for spaceflight, which is characterized in that,
in step S1:
the aerogel type microporous polyimide film is prepared by mixing 2-8wt% of nano silicon dioxide aerogel and 92-98wt% of microporous polyimide, preparing a polyimide-silicon dioxide mixture film by a sol-gel method, and removing silicon dioxide dispersed in the polyimide-silicon dioxide mixture film by hydrofluoric acid to prepare the aerogel type microporous polyimide film;
in step S3:
the metallized inorganic fiber is manufactured by plating a first conductive metal outside the inorganic fiber core layer and forming a first metal outer layer so as to manufacture the metallized inorganic fiber;
the metallized aramid fiber is manufactured by plating a second conductive metal on the outer side of the aramid fiber core layer and forming a second metal outer layer.
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