CN104810112A - LVDS transmission cable for space navigation and manufacturing method thereof - Google Patents
LVDS transmission cable for space navigation and manufacturing method thereof Download PDFInfo
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- CN104810112A CN104810112A CN201510194653.2A CN201510194653A CN104810112A CN 104810112 A CN104810112 A CN 104810112A CN 201510194653 A CN201510194653 A CN 201510194653A CN 104810112 A CN104810112 A CN 104810112A
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Abstract
The invention discloses an LVDS transmission cable for space navigation and a manufacturing method of the LVDS transmission cable for space navigation. Silver-plated copper alloy stranded wires which are stranded by a wire and cable stranding machine serve as conductors and a naked grounding wire, microporous PTFE strip insulating layers wrap the conductors through a wrapping machine, microporous PTFE strip filling cores are stranded in a bundling mode through the wire and cable stranding machine, and insulating wire cores, the filling cores and the naked grounding wire are stranded together through a cabling machine; a shielding layer is knitted through a knitting machine, and is made of round silver-plated copper wires, and a sheath is made of thin-wall extruded fusible PFA through a high-temperature plastic extruding machine. The LVDS transmission cable for space navigation has the advantages that low-loss fluoroplastic wraps the insulating layers, the shielding layer is made of the round silver-plated copper wires through knitting, and the fluoroplastic sheath is adopted; the LVDS transmission cable resists the high and low temperature and ageing, is flexible, and light in weight, low in attenuation and stable in signal transmission, has the flame retardant feature and spatial environment adaptability such as radiation resistance and vacuum gas release, and is applicable to LVDS transmission in the severe environment of the field of space navigation.
Description
Technical field:
The present invention is aerospace LVDS transmission cable and preparation method thereof, cable has the features such as long-term high-low temperature resistant (-100 DEG C ~+200 DEG C), soft, lightweight, ageing-resistant, fire-retardant, low decay, stable signal transmission, and there is the adaptive characteristic of space environment such as resistance to irradiation, vacuum outgas, be applicable to the LVDS Signal transmissions under aeronautical field severe rugged environment.
Background technology:
At present, the domestic LVDS transmission cable also not adapting to aeronautical field, main dependence on import at present, this product is designed and developed according to GJB 973A-2004 " soft and semihard radio frequency cable general specification ", GJB 773A-2000 " Aero-Space fluoropolymer insulated wire cable " and ESA/SCC 3902/002 " C0AXIAL, TRIAXIAL AND SYMMERTRIC CABLES " standard and user's Special use environmental demand.What domestic common LVDS cable adopted is all normal temperature material, and high and low temperature resistance is poor; Signal transmissions decay is large, poor electrical performance; It is thick that material extrudes thickness, and product external diameter is large, Heavy Weight, needs larger to lay space; And it is not radioresistance is poor, ageing-resistant, the instructions for use of aeronautical field severe rugged environment can not be met.
Aerospace LVDS transmission cable adopts high-low temperature resistant and low-loss fluorine material, takes into full account its applicability and fail safe, takes into full account the Special use requirements such as little, lightweight, soft, easy for installation, the resistance to irradiation of high/low temperature, external diameter, low-loss.
Summary of the invention:
A kind of aerospace LVDS transmission cable that the present invention proposes and preparation method thereof, cable conductor is high strength silver-plated copper alloy twisted wire, improves the mechanical strength of cable conductor, solves the problem of the easy disconnected core of small dimension conductor (26A wire gauge) when assembling; Insulation adopts high-low temperature resistant and low-loss PTFE material lapped insulation, reduces the outside diameter of cable and weight, the flexibility of raising cable and electric property (low decay, low electric capacity, high bandwidth) etc.; Sheath adopts Meltability polytetrafluorethyletubular (PFA) thin-walled extrusion molding, improves the mechanical performance of cable, and improves radiation-resistant property.
Technical solution of the present invention: aerospace LVDS transmission cable and preparation method thereof, its structure comprises conductor (1), insulation (2), naked earth connection (3), filled core (4), shielding (5), sheath (6), and wherein the periphery of conductor (1) is insulating barrier (2); The periphery of insulating barrier (2) is naked earth connection (3); The periphery of naked earth connection (3) is filled core (4); The periphery of filled core (4) is shielding (5); The periphery of shielding (5) is sheath (6).With electric wire cable wire twisting machine stranded silver-plated copper alloy twisted wire as conductor, naked earth connection; At conductor external application winding machine wrapped expanded microporous polytetra fluoroethylene-EPTEE (PTFE) tape insulation; Filled core is with electric wire cable wire twisting machine bundle strand expanded microporous polytetra fluoroethylene-EPTEE (PTFE); With cabler, insulated wire cores, filled core and naked earth connection are twisted together; Screen adopts braiding machine braiding, and material is silver-plated circular copper wire; Sheath adopts high temperature extrusion machine thin-walled to extrude Meltability polytetrafluorethyletubular (PFA).
the present invention has the following advantages:
(1) high strength: conductor is high strength silver-plated copper alloy twisted wire, substantially increases the mechanical performance of conductor, solves the problem of the easy disconnected core of the small dimension conductor (26A wire gauge) when technique is assembled;
(2) high-low temperature resistant: insulation and sheath all adopt can the fluoroplastics of high-low temperature resistant, make its Long-term service temperature can reach-100 ~+200 DEG C;
(3) low decay, high bandwidth: insulation adopts the expanded microporous polytetra fluoroethylene-EPTEE (PTFE) of high-foaming to be with wrapped, and the dielectric constant of dielectric is very little, can effectively reduce the signal attenuation of cable transmission, improves bandwidth;
(4) light-duty, soft: insulation adopts expanded microporous polytetra fluoroethylene-EPTEE (PTFE) band of high-foaming, the dielectric constant of dielectric is little, under ensureing the prerequisite of cable properties impedance (120 Ω), outer insulation diameter can be reduced, and density of material is low, so it is little, lightweight to compare other similar outside diameter of cable; Lapping structure effectively can also improve the pliability of cable;
(5) high flame retardant, ageing-resistant, corrosion-resistant: adopt fluoroplastics as insulation, fill and sheath material, make its cable have good fire resistance, ageing-resistant and decay resistance;
(6) excellent electrical property: be applicable to LVDS high speed data transfer, has impedance stabilization, an advantage such as little, the electric performance stablity of decaying;
(7) aerospace environmental suitability,
1) resistance to irradiation: resistance to irradiation dose 10
6rad(Si), after test, sheath is without cracking, and insulation proof voltage 800V does not puncture;
2) thermal vacuum gassing: the total mass loss (TML)≤1% of material, condensable volatile matter (CVCM)≤0.1%;
3) nonmetallic materials pernicious gas effusion: the oder levels that cable nonmetallic materials discharge excitant and special odor gas is not more than 1.5 grades, deviates from carbon monoxide and is not more than 25 μ g/g; Deviate from total organic matter and be not more than 100 μ g/g;
4) burn smoke density: result of the test should meet CCAR25 portion, (a) requirement of R3853 annex G V part, and namely after 3 specimen test 4min, average Dm must not more than 200;
5) pernicious gas that burns discharges: cable material burning produces pernicious gas and undertaken by HB 7066-1994 regulation, experimental condition: pretreatment condition (21 ± 3) DEG C, (50 ± 5) %RH, time is greater than 24h, test model is flame modes (NF+F), sampling time is 4min, and gas examination result should meet the requirement of following table.
Gas detect result
Accompanying drawing illustrates:
Fig. 1 is the structural representation of aerospace LVDS transmission cable.
In figure 1 is conductor; 2 is insulating barriers; 3 is naked earth connections; 4 is filled cores; 5 is screens; 6 is sheaths.
Embodiment:
As shown in Figure 1, aerospace LVDS transmission cable, its structure comprises conductor (1), insulating barrier (2), naked earth connection (3), filled core (4), screen (5), sheath (6), and wherein the periphery of conductor (1) is insulating barrier (2); The periphery of insulating barrier (2) is naked earth connection (3); The periphery of naked earth connection (3) is filled core (4); The periphery of filled core (4) is shielding (5); The periphery of shielding (5) is sheath (6);
Its preparation method, comprises following technique:
1) use the stranded silver-plated copper alloy twisted wire of electric wire cable wire twisting machine as conductor;
2) be with as insulating barrier at the wrapped expanded microporous polytetra fluoroethylene-EPTEE PTFE of conductor external application winding machine;
3) be with as filled core with electric wire cable wire twisting machine bundle strand expanded microporous polytetra fluoroethylene-EPTEE PTFE;
4) use electric wire cable wire twisting machine stranded silver-plated copper alloy twisted wire as naked earth connection;
5) with cabler, the insulated wire cores of insulating barrier, filled core and naked earth connection are twisted together;
6) material is silver-plated circular copper wire, adopts braiding machine woven shield;
7) high temperature extrusion machine thin-walled is adopted to extrude Meltability polytetrafluorethyletubular PFA as sheath.
Be the stranded silver-plated copper alloy twisted wire of concentric type at described conductor (1), intensity is high, stretching resistance is large.
Described insulating barrier (2) adopts expanded microporous polytetra fluoroethylene-EPTEE PTFE band wrapped, and density of material is low, decays little, lightweight, heatproof
-100℃～+250℃。
The silver-plated copper alloy twisted wire that described naked earth connection (3) adopts concentric type stranded, intensity is high, stretching resistance is large.
Described filled core (4) adopts expanded microporous polytetra fluoroethylene-EPTEE PTFE band bundle strand, and density of material is low, lightweight, heatproof-100 DEG C ~+250 DEG C.
Described screen (5) adopts the braiding of silver-plated circular copper wire.
Described restrictive coating (6) adopts Meltability polytetrafluorethyletubular PFA, and material extrusion molding thickness is thin, mechanical strength is high, external diameter is little, lightweight, heatproof-100 DEG C ~+250 DEG C.
Aerospace LVDS transmission cable, have references to GJB 973A-2004 " soft and semihard radio frequency cable general specification ", GJB 773A-2000 " Aero-Space fluoropolymer insulated wire cable " and ESA/SCC 3902/002 " C0AXIAL, TRIAXIAL AND SYMMERTRIC CABLES " standard and user's Special use environmental demand design and develop, and product can adapt to the LVDS Signal transmissions under aeronautical field severe rugged environment.
Claims (8)
1. aerospace LVDS transmission cable, it is characterized in that comprising conductor (1), insulation (2), naked earth connection (3), filled core (4), shielding (5), sheath (6), wherein the periphery of conductor (1) is insulating barrier (2); The periphery of insulating barrier (2) is naked earth connection (3); The periphery of naked earth connection (3) is filled core (4); The periphery of filled core (4) is shielding (5); The periphery of shielding (5) is sheath (6).
2. the aerospace preparation method of LVDS transmission cable as claimed in claim 1, is characterized in that comprising following technique:
1) use the stranded silver-plated copper alloy twisted wire of electric wire cable wire twisting machine as conductor;
2) be with as insulating barrier at the wrapped expanded microporous polytetra fluoroethylene-EPTEE PTFE of conductor external application winding machine;
3) be with as filled core with electric wire cable wire twisting machine bundle strand expanded microporous polytetra fluoroethylene-EPTEE PTFE;
4) use electric wire cable wire twisting machine stranded silver-plated copper alloy twisted wire as naked earth connection;
5) with cabler, the insulated wire cores of insulating barrier, filled core and naked earth connection are twisted together;
6) material is silver-plated circular copper wire, adopts braiding machine woven shield;
7) high temperature extrusion machine thin-walled is adopted to extrude Meltability polytetrafluorethyletubular PFA as sheath.
3. the preparation method of aerospace LVDS transmission cable according to claim 2, it is characterized in that at described conductor (1) be the stranded silver-plated copper alloy twisted wire of concentric type, intensity is high, stretching resistance is large.
4. the preparation method of aerospace LVDS transmission cable according to claim 2, it is characterized in that adopting expanded microporous polytetra fluoroethylene-EPTEE PTFE band wrapped at described insulating barrier (2), density of material is low, decays little, lightweight, heatproof-100 DEG C ~+250 DEG C.
5. the preparation method of aerospace LVDS transmission cable according to claim 2, it is characterized in that the silver-plated copper alloy twisted wire adopting concentric type stranded at described naked earth connection (3), intensity is high, stretching resistance is large.
6. the preparation method of aerospace LVDS transmission cable according to claim 2, it is characterized in that adopting expanded microporous polytetra fluoroethylene-EPTEE PTFE band bundle strand at described filled core (4), density of material is low, lightweight, heatproof-100 DEG C ~+250 DEG C.
7. the preparation method of aerospace LVDS transmission cable according to claim 2, is characterized in that adopting the braiding of silver-plated circular copper wire at described screen (5).
8. the preparation method of aerospace LVDS transmission cable according to claim 2, it is characterized in that adopting Meltability polytetrafluorethyletubular PFA at described restrictive coating (6), material extrusion molding thickness is thin, mechanical strength is high, external diameter is little, lightweight, heatproof-100 DEG C ~+250 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510194653.2A CN104810112A (en) | 2015-04-23 | 2015-04-23 | LVDS transmission cable for space navigation and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510194653.2A CN104810112A (en) | 2015-04-23 | 2015-04-23 | LVDS transmission cable for space navigation and manufacturing method thereof |
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| CN104810112A true CN104810112A (en) | 2015-07-29 |
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| CN201510194653.2A Pending CN104810112A (en) | 2015-04-23 | 2015-04-23 | LVDS transmission cable for space navigation and manufacturing method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105741964A (en) * | 2016-04-25 | 2016-07-06 | 安费诺电子装配（厦门）有限公司 | Differential signal unit for video/audio/data transmission line and manufacturing method of differential signal unit |
| CN109599228A (en) * | 2018-12-10 | 2019-04-09 | 查正春 | A kind of sound equipment small signal transmssion line manufacture craft of twin-core band shielding |
| CN114420348A (en) * | 2022-01-21 | 2022-04-29 | 湖北航天电缆有限公司 | Aviation ultrahigh frequency low-loss high-low temperature resistant high-speed data bus and preparation method thereof |
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| CN105741964A (en) * | 2016-04-25 | 2016-07-06 | 安费诺电子装配（厦门）有限公司 | Differential signal unit for video/audio/data transmission line and manufacturing method of differential signal unit |
| CN109599228A (en) * | 2018-12-10 | 2019-04-09 | 查正春 | A kind of sound equipment small signal transmssion line manufacture craft of twin-core band shielding |
| CN114420348A (en) * | 2022-01-21 | 2022-04-29 | 湖北航天电缆有限公司 | Aviation ultrahigh frequency low-loss high-low temperature resistant high-speed data bus and preparation method thereof |
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Application publication date: 20150729 |
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