CN109192387A - A kind of aircraft instrumentation control radar coaxial cable and the preparation method for inhaling wave inner sheath - Google Patents
A kind of aircraft instrumentation control radar coaxial cable and the preparation method for inhaling wave inner sheath Download PDFInfo
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- CN109192387A CN109192387A CN201811089440.3A CN201811089440A CN109192387A CN 109192387 A CN109192387 A CN 109192387A CN 201811089440 A CN201811089440 A CN 201811089440A CN 109192387 A CN109192387 A CN 109192387A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
- H01B11/1808—Construction of the conductors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
- B29C69/02—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore of moulding techniques only
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B11/00—Communication cables or conductors
- H01B11/18—Coaxial cables; Analogous cables having more than one inner conductor within a common outer conductor
- H01B11/1834—Construction of the insulation between the conductors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
- H01B7/041—Flexible cables, conductors, or cords, e.g. trailing cables attached to mobile objects, e.g. portable tools, elevators, mining equipment, hoisting cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
- B29K2027/12—Use of polyvinylhalogenides or derivatives thereof as moulding material containing fluorine
- B29K2027/18—PTFE, i.e. polytetrafluorethene, e.g. ePTFE, i.e. expanded polytetrafluorethene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2029/00—Belts or bands
Abstract
The invention discloses the preparation methods of a kind of aircraft instrumentation control radar coaxial cable and suction wave inner sheath, including conductor, insulating layer, aluminium-plastic tape shielded layer, interior woven shield, braiding lubricant layer, outer woven shield, inner sheath and the oversheath set gradually from inside to outside；Using MULTILAYER COMPOSITE, cable is subjected to structure refinement, is divided into interior woven shield, braiding lubricant layer and outer woven shield for the shielded layer of the prior art, greatly improves structural behaviour, also improve the shielding properties of cable.
Description
Technical field
The present invention relates to technical field of coaxial cable, and in particular to a kind of aircraft instrumentation control radar coaxial cable.
Background technique
Currently, repairing and detecting used coaxial cable when certain series aircraft radar performance is import Russia cable,
There are following situations for the cable:
1, insulating layer uses the wrapped polytetrafluoroethylene film of overlapping to be formed: because of the wrapped Duplication used for 52%-56%,
So insulating surface is seriously uneven, causes the characteristic impedance of cable to be fluctuated very big, and affect fade performance, drop significantly
Low rebecca maintenance and detection accuracy.
2, braiding layer directly contacts wrapping insulation layer: in braiding process, because the braided wires in processing are put
Line tension causes braided wires to squeeze insulating layer and form braiding mark in wrapping insulation layer, characteristic impedance to cable and declines
Subtract performance and causes damage in structure；During cable Reusability, because having external broach and outer trampling power, cause to weave
Silk squeezes insulating layer and forms braiding mark in wrapping insulation layer, and with using time and the frequency to increase, the mark of generation
It is deeper, the performance of cable is gradually decreased, rebecca maintenance and detection accuracy are greatly reduced.
3, interior braiding layer is directly contacted with outer braiding layer: cable is during Reusability, because being frequently bended, interior braiding layer
It frequently rubs with outer braiding layer, the coating of braided wires is caused to be worn, affect interference free performance when maintenance and detection, influence
Testing result.
4, sheath is that one layer of nominal thickness of extrusion is used to be formed in outer braiding layer for the perfluoroethylene-propylene of 0.70mm, is led
It sends a telegraph that cable is harder, difficulty and the time of installation is increased in maintenance and detection, especially wartime can seriously affect out probability.
Summary of the invention
The object of the invention is that a kind of aircraft instrumentation control radar coaxial cable is provided to solve the above-mentioned problems, with
Insulating surface is seriously uneven in the prior art for solution, causes the characteristic impedance of cable to be fluctuated very big, and then affect decaying
Performance, eventually reduces rebecca maintenance and detection accuracy, the present invention using 0.05mm-0.15mm semi-directional or orientation
The wrapped Duplication range of polytetrafluoroethylene film is that 46%-49% technique solves the serious uneven situation of insulating surface；Exhausted
It is provided with aluminium-plastic tape shielded layer between edge layer and interior woven shield, avoids interior braiding layer and directly contacts lapped insulation
Layer reduces external broach and outer trampling power and squeezes insulating layer so that in wrapping insulation layer formation braiding mark, makes the performance of cable
It gradually decreases, greatly reduces rebecca maintenance and detection accuracy；It is added in interior woven shield and outer woven shield
Nano graphite powder, and braiding lubricant layer is provided between interior woven shield and outer woven shield, graphite hardness is very
It is low, it can be used as good lubricant, the coating for reducing braided wires is worn, and affects anti-interference when maintenance and detection
Can, testing result is affected, while graphite has good electric conductivity, therefore the screen of interior woven shield and outer woven shield
Function is covered to further strengthen；Oversheath uses one layer of nominal thickness for the perfluoroethylene-propylene layer of 0.40mm, compared with than nominal thickness
Flexible is had more for the perfluoroethylene-propylene layer oversheath of 0.70mm, enhances use scope.In view of the above-mentioned problems, as detailed below
It illustrates.
To achieve the above object, the present invention provides following technical schemes:
A kind of aircraft instrumentation control radar coaxial cable provided by the invention, including set gradually from inside to outside conductor, absolutely
Edge layer, aluminium-plastic tape shielded layer, interior woven shield, braiding lubricant layer, outer woven shield, inner sheath and oversheath；It adopts
With MULTILAYER COMPOSITE, cable is subjected to structure refinement, is divided into interior woven shield, braiding lubricant layer for the shielded layer of the prior art
With outer woven shield, structural behaviour is greatly improved, also improves the shielding properties of cable.
The conductor uses 7 nominal diameters to be twisted for the first silver-coated copper wire of 0.82mm, first silver-plated copper
The silver coating thickness at least 2um of line, the conductor diameter range are 2.40mm-2.45mm.It is twisted using hemicompact pressure type technique, increase
The contact surface for having added each first silver-coated copper wire can obtain, the size and conducting wire of conductor resistance from resistance formula (R=ρ * L/S)
Length is directly proportional, be inversely proportional with sectional area of wire and resistivity of material is related；Same material and sectional area, the longer electricity of conducting wire
Bigger, same material and length are hindered, smaller (conducting wire the is thinner) resistance of sectional area is bigger；So use 7 nominal diameters for
The first silver-coated copper wire of 0.82mm is twisted, reduces the resistance of cable；Twisting process makes cable when being bent towards different directions, right
The cross section of cable influences very small, moreover it is possible to keep good electric conductivity, not generate with the direction structure variation of cable larger
Resistance variations；Resistivity (ρ/n Ω m) of the metal at 20 DEG C are as follows: silver-colored 15.86, copper 16.78, silver and copper are relative to other
Its electric conductivity of metal simple-substance is metal the most superior, therefore uses silver-coated copper wire, considerably increases its electric conductivity and conduction
Stability.Using copper wire silver plating process, silver layer is thicker, and electric conductivity is better.
As a further improvement of the above technical scheme:
The insulating layer uses nominal thickness to use for the semi-directional of 0.05mm-0.15mm or the polytetrafluoroethylene film of orientation
It is seamless to carry out that multilayer is wrapped forms around packet mode, and the lapping direction of adjacent two layers polytetrafluoroethylene film is on the contrary, the insulating layer
The gap control of the left and right edges opposite joint of polytetrafluoroethylene film exists after every layer of wrapped Duplication range is 46%-49% and is wrapped
Within 1mm, the external diametrical extent of the insulating layer is 7.40mm-7.60mm.Semi-directional or the polytetrafluoroethylene film of orientation are poly- second
Pressed after alkene film turning through prolonging, surface more smooth, there is no a lathe tool trace, and polytetrafluoroethylene (PTFE) be commonly referred to as " non-sticking lining " or
" material easy to clean "；Polytetrafluoroethylene (PTFE) has the characteristics that antiacid alkali resistant, resists various organic solvents, is practically insoluble in all molten
Agent.Meanwhile polytetrafluoroethylene (PTFE) has the characteristics that resistant to high temperature, its coefficient of friction is extremely low, so can make lubricant, by conductor and aluminium
Plastic composite strip shielded layer is kept apart, and lubricating action is played；Polytetrafluoroethylene (PTFE) also has good insulating properties, therefore polytetrafluoroethylene (PTFE) is thin
Film is used for condenser dielectric, makees wire insulation, electrical instrumentation insulation, sealing gasket.It is used as insulating layer material in the present invention, and adopts
Carry out around packet mode that multilayer is wrapped with seamless, the lapping direction of adjacent two layers polytetrafluoroethylene film is on the contrary, and control Duplication model
Enclose the gap of the left and right edges opposite joint for 46%-49% and polytetrafluoroethylene film within 1mm, every strata tetrafluoroethylene around
Packet all reaches complete sealing, and wrapped Duplication compared with prior art is 52%-56%, and the final insulating layer of the present invention is smooth
Degree is high, is not in rough when the gap of the left and right edges opposite joint of strict control polytetrafluoroethylene film is within 1mm
Situation, especially cable when in use, when cable bend, due to being every layer of wrapped and adjacent layer lapping direction on the contrary, absolutely
Edge layer drawing force and extruding force in a degree of bending is more dispersed, smaller to the active force of conductor, while also protecting
The stable structure of conductor.The dielectric constant of polytetrafluoroethylene film is successively from by force to weak for orientation, semi-directional and non-directional, using half
Orientation or orientation polytetrafluoroethylene film are as insulating layer, because its insulation performance is more preferable than non-directional polytetrafluoroethylene film.
The aluminium-plastic tape shielded layer uses nominal thickness to carry out longitudinal wrap for the plastic-aluminum combined film of 0.07mm-0.10mm
One layer, the aluminum layer thickness of the aluminium-plastic tape shielded layer is not less than 0.05mm and aluminium surface layer outwardly, and longitudinal wrap Duplication is 20%-
35%.Nominal thickness is that the plastic-aluminum combined film of 0.07mm-0.10mm is very thin, and longitudinal wrap reduces deformation when cable bend, into
And the influence to conductor is reduced, aluminium layer has good shield effectiveness, and Duplication is that 20%-35% completely covers two edges
It is good, avoid the occurrence of sky drain region.On the one hand setting aluminium-plastic tape shielded layer has shield effectiveness, if on the other hand interior braiding screen
It covers layer and directly contacts wrapping insulation layer, in braiding process, because the laying tension of the braided wires in processing, causes to compile
It knits silk to squeeze insulating layer and form braiding mark in wrapping insulation layer, characteristic impedance and fade performance to cable cause to finish
Damage on structure；During cable Reusability, because having external broach and outer trampling power, braided wires is caused to squeeze insulating layer
And braiding mark is formed in wrapping insulation layer, and with using time and the frequency to increase, the mark of generation is deeper, makes the property of cable
It can gradually decrease, greatly reduce rebecca maintenance and detection accuracy.
The interior woven shield uses nominal thickness to weave for the second silver-coated copper wire of 0.18mm-0.20mm, and described the
The count of the silver coating thickness at least 2um of two silver-coated copper wires, the interior woven shield are not less than 90%；Interior braid shielded
The shield effectiveness of layer depends on the count of interior woven shield, and count is smaller, and shield effectiveness is poorer, count
Bigger, shield effectiveness is better.Since the electric conductivity of silver is better than copper, the shield effectiveness of interior braiding layer is more preferable after silver-plated.It is silver-plated
Thickness degree is no less than 2um, and preventing cable, silver coating is too thin because friction is easy to be worn in use, affects maintenance and inspection
Interference free performance when survey, affects testing result.
The braiding lubricant layer uses nominal thickness to be overlapped for the non-directional polytetrafluoroethylene film of 0.05mm-0.15mm
Wrapped one layer, wrapped Duplication range is 20%-35%；The tensile strength of polytetrafluoroethylene film successively from big to small for orientation,
Semi-directional and non-directional；The extension at break degree of polytetrafluoroethylene film is successively non-directional, semi-directional and orientation from big to small；Cause
This uses non-directional polytetrafluoroethylene film by outer layer when using polytetrafluoroethylene film, poly- using semi-directional or orientation by inner layer
Tetrafluoroethylene.It weaves lubricant layer to be between interior woven shield and outer woven shield, in cable bend by interior braiding
The shearing force of shielded layer and outer woven shield is big, so the non-directional polytetrafluoroethylene film strong using extension at break degree；It is leaning on
The insulating layer of inner layer, in cable bend, shearing force is very small, so using the big semi-directional of tensile strength or orientation poly- four
Fluoride film.Since there is polytetrafluoroethylene (PTFE) good lubricity to avoid interior volume using polytetrafluoroethylene (PTFE) material as lubricant layer
Tissue layer is directly contacted with outer braiding layer；Avoid cable during Reusability, because being frequently bended, interior braiding layer and outer braiding layer
Frequently friction, causes the coating of braided wires to be worn, and affects interference free performance when maintenance and detection, affects detection knot
Fruit.
The outer woven shield uses nominal thickness to weave for the second silver-coated copper wire of 0.18mm-0.20mm, and described the
The count of the silver coating thickness at least 2um of two silver-coated copper wires, the outer woven shield are not less than 90%, the outer braiding
The material effects principle of layer is the same as above-mentioned interior braiding layer.
It is the polytetrafluoroethylraw raw material band of 0.05mm-0.10mm according to seamless wrapped side that the inner sheath, which uses nominal thickness,
Formula carry out two layers it is wrapped form, the lapping direction of two layers of polytetrafluoroethylraw raw material band on the contrary, and wrapped Duplication range be
The gap of 46%-49%, the left and right edges opposite joint after every layer of polytetrafluoroethylraw raw material band is wrapped need to control within 1mm,
The thickness range of the inner sheath is 0.20mm-0.30mm.Polytetrafluoroethylraw raw material band is a kind of ideal sealing material of novelty,
Due to its nontoxic, tasteless, excellent leakproofness, insulating properties, rotproofness, it is widely used in water process, natural gas, chemical industry, modeling
The fields such as material, electronic engineering.Polytetrafluoroethylene (PTFE) high and low temperature resistance is superior, and long-term use temperature reaches 200-260 DEG C, and low temperature reaches
Still soft when to -100 DEG C, polytetrafluoroethylraw raw material band has the characteristics that good toughness, longitudinal strength are high, transverse direction is easily deformable；Institute
State polytetrafluoroethylraw raw material band it is wrapped after the gap of left and right edges opposite joint need to control within 1mm, and wrapped Duplication range
Reach 46%-49%, outer screen is wrapped up well, sealing is achieved the effect that on circumferential surface.
The oversheath is the perfluoroethylene-propylene layer that one layer of nominal thickness is 0.40mm, and the perfluoroethylene-propylene layer is adopted
It is made of extrusion process, the oversheath external diametrical extent is 10.50mm-11.50mm.260 degree of polytetrafluoroethylene (PTFE) high temperature resistant, gather complete
200 degree of fluoro ethyl propene film heatproof, the heat-fusible processing of perfluoroethylene-propylene and polytetrafluoroethylene film mainly uses turnery processing and
It is higher than polytetrafluoroethylene (PTFE) at, polyfluorinated ethylene membrane intensity, so as oversheath being because gathering using perfluoroethylene-propylene
Perfluoroethylene-propylene (copolymer) high temperature resistant and have good hot melt processability be integrally formed as the outermost layer of cable using extrusion process
It is most stable of in structure；Oversheath in respect to the background art, which uses, squeezes out one layer of nominal thickness as the poly- perfluor of 0.70mm
Second propylene layer, oversheath of the invention is thinner compared to background technique, and flexibility is more preferable, reduces installation in maintenance and detection
Difficulty and time, especially wartime can greatly improve out probability.Since shielded layer of the invention is shielded using multilayer separately advancing type,
It is refined in structure, it is smaller to the influence of inner conductor in cable work, the thickness requirement of external jacket is reduced,
The stability and structural behaviour of cable are greatly improved on the whole.
As a further improvement of the above technical scheme:
Graphite micropowders, the graphite micropowders are filled in the interior woven shield and outer woven shield
Grain median diameter is less than 1um, separation layer is provided between the outer woven shield and inner sheath, the separation layer is using nominal
It carries out being overlapped wrapped one layer with a thickness of the non-directional polytetrafluoroethylene film of 0.05mm-0.15mm, wrapped Duplication range is 20%-
35%.Graphite micropowders have good conductive and heat-conductive and greasy property, are filled in interior woven shield and outer braid shielded
In layer, the shielding properties of interior woven shield and outer woven shield, the electromagnetism of different frequency and different wave length are greatly improved
When wave passes through interior woven shield and outer woven shield, graphite micropowders have good wave-absorbing effect, and internally compile
Knit the supplement of the shielding properties of shielded layer and outer woven shield.Graphite micropowders therefore special structure, have good
Greasy property adds graphite micropowders, reduces the second silver-coated copper wire of interior woven shield and outer woven shield each other
Between abrasion, braiding layer stretches cable in use, in cable bend drawing process generates bigger void area, and graphite is super
Fine powder can fill void area well, reduce the shield effectiveness to shielded layer.Separation layer is set, by outer braiding layer and interior shield
Set is kept apart, and prevents graphite micropowders from entering inner restrictive coating.
The inner sheath is added with absorbing material, and the absorbing material is polycrystalline iron fiber absorbent, ferrite suction wave material
The one or more of material, nano wave-absorption coating.Electromagnetic wave is made of orthogonal magnetic field and electric field, the mechanism of action be divided into
Lower 3 kinds: 1, high-permeability material can make the magnetic-field component in electromagnetic wave be converted to thermal losses to fall；2 or use high conductivity material
Make the electric field component in electromagnetic wave be converted to thermal losses to fall,；3, the electric and magnetic fields in electromagnetic wave are turned using Energy dissipating material
Chemical conversion thermal losses is fallen.Added as the first screen layer of cable according to different absorbing materials in inner sheath addition absorbing material
Add, can achieve the filter effect of inner sheath from low to high.
A kind of preparation method for inhaling wave inner sheath is also disclosed in the present invention, comprising the following steps:
Step 1: absorbing material is carried out grinding with ball mill, it is 100nm that gained, which inhales wave powder particles median diameter,；Inhale wave
Powder reaches Nano grade, can preferably disperse in polyflon, meanwhile, absorbing material reaches Nano grade, filtering
Effect is more preferable；For the wavelength of electromagnetic wave from microwave to long wave, span is bigger, and cable used in aircraft can face different environment, inhales
Wave powder particles median diameter is good wave filtering effect of the 100nm to microwave.
It is mixed step 2: first step gained is inhaled wave powder and is added by weight part 20%-40% into polyflon
It closes, it is evenly dispersed to prepare paste resin；Weight ratio part 20%-40% had not only had good filter effect, but also raw to polytetrafluoroethylene (PTFE)
Material strip final structure influences less, and weight ratio part such as continues to increase, and can seriously affect the structural behaviour of polytetrafluoroethylraw raw material band.
Step 3: paste resin is carried out heating stirring to rise 50 DEG C of temperature per hour, and final heating must not exceed
350℃；Polytetrafluoroethylraw raw material band is polytetrafluoroethyldispersion dispersion resin in ingredient, calendering, heating drawing process, without sintering
Belt, be raw material band, heating rate is too fast to be easy to cause polytetrafluoroethylene (PTFE) to decompose, and at normal temperature, final temperature is such as more than
370 DEG C of polytetrafluoroethyldispersion dispersion resins then start to be sintered, and performance can also change correspondingly.
Step 4: paste resin is rolled and stretched after third step is heated, the polytetrafluoroethyl-ne with filter function is made
Alkene raw material band.
Beneficial effect is:
1, insulating layer is using seamless around the wrapped polytetrafluoroethylene film of packet mode, and the lapping direction of adjacent two layers film is on the contrary, every
One layer of wrapped Duplication scope control is between 46%~49%, the gap of the left and right edges opposite joint of each wrapped caudacoria of tunic
Need to control within 1mm, it is wrapped after outer insulation diameter scope control in 7.40-7.60mm.By the above measure, make insulating surface
Very smooth, it is≤0.45dB/m in the decaying of 3000MHz that the characteristic impedance of cable, which is 50 ± 1 Ω, after tested, than former import electricity
The performance of cable (characteristic impedance is 50 ± 3 Ω, and the decaying of 3000MHz is≤0.74dB/m) improves, to improve aircraft thunder
Up to the precision of maintenance and detection.
2, it is provided with aluminium-plastic tape shielded layer between insulating layer and interior woven shield, braiding layer can be eliminated to exhausted
The braiding mark that edge layer generates, the characteristic impedance to cable and the damage of fade performance are eliminated from structure, in turn ensures electricity
Cable ensure that the stability of cable, not only improve winged with using that time and the frequency increase and test performance will not change
Machine radar maintenance and detection accuracy, it is ensured that the consistency for each airplane precision repaired and detected.Meanwhile it being provided with
Aluminium-plastic tape shielded layer makes cable be provided with the ability of the resistance external electromagnetic interference in the case where being more than the higher frequency of 3000MHz,
Expand the application range of cable.
3, it is provided with braiding lubricant layer between interior woven shield and outer woven shield, makes cable in Reusability mistake
Cheng Zhong will not make interior braiding layer cause the coating of braided wires to be worn with outer braiding layer direct friction due to being frequently bended, from
And ensure that interference free performance when maintenance and detection, it ensure that the accuracy of the result of maintenance and detection.
4, compared with the shielded layer of traditional cable, shielded layer is subdivided into aluminium-plastic tape shielded layer, interior braiding by the present invention
Shielded layer, braiding lubricant layer, outer woven shield and inner sheath add absorbing material, improve the shielding properties of cable, again
Because of the improvement in structure, sheath uses wrapped inner sheath+extrusion oversheath composite sheath form, effectively improves cable
Hardness, and the structural behaviour of cable is greatly improved, the thickness of oversheath can further decrease, and promote cable jacket
Pliability reduces difficulty and the time of installation in maintenance and detection, improves the efficiency of maintenance.
5, this cable can substitute Russian import cable completely and can break with batch application in aircraft repair plant at present
Production domesticization is realized in external technology blockage.
6, graphite micropowders are added in interior braiding layer and outer braiding layer, further improve the shield effectiveness of cable,
Simultaneously when cable is during Reusability, the void area that interior braiding layer and outer braiding layer are generated when stretching can be surpassed by graphite
Fine powder filling, ensure that the shielding stability of cable, graphite micropowders also have good lubricating function, can be reduced interior volume
Abrasion between silver-coated copper wire used in tissue layer and outer braiding layer.
7, multilayer refinement shielded layer, electromagnetic wave differently is shielded well, absorbing material to wavelength compared with
Short electromagnetic wave (nanoscale microwave) has good absorption effect；Outer braiding layer and interior braiding layer centering long-wave electromagnetic waves have
Good absorption effect；Aluminium-plastic tape shielded layer all has good absorption effect to radio wave and microwave；Such as interior volume
Graphite micropowders are added in tissue layer and outer braiding layer, shield effectiveness will be promoted further again, while also shield conductor pair
Outer radiation.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of embodiment cross section structure schematic diagram of the invention；
Fig. 2 is a kind of embodiment cross section structure schematic diagram of the invention；
The reference numerals are as follows:
1, conductor；2, insulating layer；3, aluminium-plastic tape shielded layer；4, interior woven shield；5, lubricant layer is woven；6, outer volume
Knit shielded layer；7, inner sheath；8, oversheath；9, separation layer.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, technical solution of the present invention will be carried out below
Detailed description.Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art are obtained all without making creative work
Other embodiment belongs to the range that the present invention is protected.
The technical solution of each embodiment can be combined in the present invention, and the technical characteristic in embodiment can also be combined shape
The technical solution of Cheng Xin.
Embodiment one: as shown in Figure 1, a kind of aircraft instrumentation control radar coaxial cable of the present embodiment, including from inside to outside
Conductor 1, insulating layer 2, aluminium-plastic tape shielded layer 3, interior woven shield 4, braiding lubricant layer 5, the outer braiding screen set gradually
Cover layer 6, inner sheath 7 and oversheath 8；
Conductor 1 uses 7 nominal diameters to be twisted for the first silver-coated copper wire of 0.82mm, the first silver-coated copper wire it is silver-plated
Thickness degree at least 2um, 1 outer diameter of conductor are 2.40mm.It is twisted using hemicompact pressure type technique, increase connecing for each first silver-coated copper wire
Contacting surface can obtain from resistance formula (R=ρ * L/S), and the size and conductor length of conductor resistance be directly proportional and sectional area of wire
It is inversely proportional related with resistivity of material；Same material and sectional area, conducting wire is longer, and resistance is bigger, same material and length,
Smaller (conducting wire the is thinner) resistance of sectional area is bigger；So using 7 nominal diameters twisted for the first silver-coated copper wire of 0.82mm, subtract
The resistance of cable is lacked；Twisting process makes cable when being bent towards different directions, influences on the cross section of cable very small, moreover it is possible to
Good electric conductivity is kept, does not generate biggish resistance variations with the direction structure variation of cable；Electricity of the metal at 20 DEG C
Resistance rate (ρ/n Ω m) are as follows: silver-colored 15.86, copper 16.78, its electric conductivity is the most superior to silver relative to other metal simple-substances with copper
Metal, therefore use silver-coated copper wire, considerably increase its electric conductivity and conductive stability.Using copper wire silver plating process, silver layer
Thicker, electric conductivity is better.
It is the semi-directional of 0.05mm or the polytetrafluoroethylene film of orientation using seamless wrapped side that insulating layer 2, which uses nominal thickness,
Formula carries out that multilayer is wrapped forms, and adjacent two layers polytetrafluoroethylene film lapping direction on the contrary, every layer of insulating layer 2 wrapped overlapping
The gap of the left and right edges opposite joint of polytetrafluoroethylene film controls within 1mm after rate is 46% and is wrapped, and the outer diameter of insulating layer 2 is
7.40mm.Semi-directional or the polytetrafluoroethylene film of orientation are pressed after polyethylene film turning through prolonging, surface more smooth, without vehicle
Tool marks, and polytetrafluoroethylene (PTFE) is commonly referred to as " non-sticking lining " or " material easy to clean "；Polytetrafluoroethylene (PTFE) has antiacid alkali resistant, resists respectively
The characteristics of kind organic solvent, it is practically insoluble in all solvents.Meanwhile polytetrafluoroethylene (PTFE) has the characteristics that resistant to high temperature, it rubs
It is extremely low to wipe coefficient, so lubricant can be made, conductor 1 and aluminium-plastic tape shielded layer 3 are kept apart, plays lubricating action；Polytetrafluoro
Ethylene also has good insulating properties, therefore polytetrafluoroethylene film is used for condenser dielectric, makees wire insulation, electrical instrumentation is exhausted
Edge, sealing gasket.It is used as isolation material in the present invention, and using seamless wrapped, the adjacent two layers poly- four around packet mode progress multilayer
The lapping direction of fluoride film is on the contrary, and control Duplication as 46% and the gap of the left and right edges opposite joint of polytetrafluoroethylene film
Within 1mm, every strata tetrafluoroethylene is wrapped all to reach complete sealing, and wrapped Duplication compared with prior art is
52%-56%, final insulating layer 2 flatness of the present invention is high, in the left and right edges opposite joint of strict control polytetrafluoroethylene film
When gap is within 1mm, be not in uneven situation, especially cable when in use, when cable bend, due to
Every layer of wrapped and adjacent layer lapping direction on the contrary, insulating layer 2 in a degree of bending, drawing force and extruding force be more
Dispersion, it is smaller to the active force of conductor 1, while also protecting the stable structure of conductor 1.The dielectric constant of polytetrafluoroethylene film is successively
From by force to weak for orientation, semi-directional and non-directional, insulating layer 2 is used as using semi-directional or orientation polytetrafluoroethylene film, because it is exhausted
Edge performance is more preferable than non-directional polytetrafluoroethylene film.
Aluminium-plastic tape shielded layer 3 uses nominal thickness to carry out one layer of longitudinal wrap for the plastic-aluminum combined film of 0.07mm, plastic-aluminum
Outwardly, longitudinal wrap Duplication is 20% to the aluminum layer thickness 0.05mm and aluminium surface layer of composite band shielded layer 3.Nominal thickness is 0.07mm's
Plastic-aluminum combined film is very thin, and longitudinal wrap reduces deformation when cable bend, and then reduces the influence to conductor 1, and aluminium layer has good
Good shield effectiveness, Duplication completely cover two edges for 20%, avoid the occurrence of sky drain region.Aluminium-plastic tape screen is set
3 one side of layer is covered with shield effectiveness, if on the other hand interior woven shield 4 directly contacts wrapping insulation layer 2, is added in braiding
During work, because of the laying tension of the braided wires in processing, cause braided wires to the extruding of insulating layer 2 and in wrapping insulation layer
2 form braiding mark, and characteristic impedance and fade performance to cable cause the damage in structure；In cable Reusability process
In, because having external broach and outer trampling power, braided wires is caused to squeeze insulating layer 2 and form braiding mark in wrapping insulation layer 2,
And with using time and the frequency to increase, the mark of generation is deeper, gradually decreases the performance of cable, greatly reduces aircraft thunder
Up to maintenance and detection accuracy.
Interior woven shield 4 uses nominal thickness to weave for the second silver-coated copper wire of 0.18mm, the plating of the second silver-coated copper wire
The count of silver thickness at least 2um, interior woven shield 4 are not less than 90%；The shield effectiveness of interior woven shield 4 depends on
In the count of interior woven shield 4, count is smaller, and shield effectiveness is poorer, and count is bigger, shield effectiveness
Better.Since the electric conductivity of silver is better than copper, the shield effectiveness of interior braiding layer is more preferable after silver-plated.Silver coating thickness is no less than 2um,
Preventing cable, silver coating is too thin because friction is easy to be worn in use, affects anti-interference when maintenance and detection
Can, affect testing result.
Braiding lubricant layer 5 uses nominal thickness to carry out being overlapped wrapped one layer for the non-directional polytetrafluoroethylene film of 0.05mm,
Wrapped Duplication is 20%；The tensile strength of polytetrafluoroethylene film is from big to small successively orientation, semi-directional and non-directional；Poly- four
The extension at break degree of fluoride film is successively non-directional, semi-directional and orientation from big to small；Therefore, polytetrafluoroethylene film is being used
When, non-directional polytetrafluoroethylene film is used by outer layer, uses semi-directional or orientation polytetrafluoroethylene film by inner layer.Weave lubricant layer
5 are between interior woven shield 4 and outer woven shield 6, in cable bend by interior woven shield 4 and outer braid shielded
The shearing force of layer 6 is big, so the non-directional polytetrafluoroethylene film strong using extension at break degree；In the insulating layer 2 for leaning on inner layer, in electricity
When cable is bent, shearing force is very small, so using the big semi-directional of tensile strength or orientation polytetrafluoroethylene film.Due to polytetrafluoro
There is ethylene good lubricity to avoid interior braiding layer and outer braiding layer direct using polytetrafluoroethylene (PTFE) material as lubricant layer
Contact；Avoid cable during Reusability, because being frequently bended, interior braiding layer frequently rubs with outer braiding layer, causes to weave
The coating of silk is worn, and affects interference free performance when maintenance and detection, affects testing result.
Outer woven shield 6 uses nominal thickness to weave for the second silver-coated copper wire of 0.18mm, the plating of the second silver-coated copper wire
The count of silver thickness at least 2um, outer woven shield 6 are not less than 90%, and the material effects principle of outer braiding layer is same as above
State interior braiding layer.
Inner sheath 7 uses nominal thickness to carry out two layers according to seamless around packet mode for the polytetrafluoroethylraw raw material band of 0.05mm
Wrapped to form, the lapping direction of two layers of polytetrafluoroethylraw raw material band is on the contrary, and wrapped Duplication is 46%, every strata tetrafluoroethene
The gap of left and right edges opposite joint after raw material band is wrapped need to control within 1mm, inner sheath 7 with a thickness of 0.20mm.Polytetrafluoro
Ethylene raw material band is a kind of ideal sealing material of novelty, due to its nontoxic, tasteless, excellent leakproofness, insulating properties, corrosion resistant
Property, it is widely used in the fields such as water process, natural gas, chemical industry, plastics, electronic engineering.Polytetrafluoroethylene (PTFE) high and low temperature resistance
Superior, long-term use temperature reaches 200-260 DEG C, and low temperature reaches still soft at -100 DEG C, and polytetrafluoroethylraw raw material band has tough
Property it is good, longitudinal strength is high, lateral easily deformable feature；The gap of left and right edges opposite joint after polytetrafluoroethylraw raw material band is wrapped
It need to control within 1mm, and wrapped Duplication reaches 46%, outer screen is wrapped up well, is reached on circumferential surface
The effect of sealing.
Oversheath 8 is the perfluoroethylene-propylene layer that one layer of nominal thickness is 0.40mm, and perfluoroethylene-propylene layer is using extrusion
Technique is made, and 260 degree of polytetrafluoroethylene (PTFE) high temperature resistant, 200 degree of polyfluorinated ethylene membrane heatproof, perfluoroethylene-propylene is heat-fusible to be added
Work and polytetrafluoroethylene film is mainly formed with turnery processing, polyfluorinated ethylene membrane intensity be higher than polytetrafluoroethylene (PTFE), so
Using perfluoroethylene-propylene as oversheath 8 be because perfluoroethylene-propylene high temperature resistant and have good hot melt processability, make
For the outermost layer of cable, using being most stable of on extrusion process integrated formed structure；Oversheath 8 in respect to the background art
It using and squeezes out one layer of nominal thickness as the perfluoroethylene-propylene layer of 0.70mm, oversheath 8 of the invention is thinner compared to background technique,
Flexibility is more preferable, and difficulty and the time of installation are reduced in maintenance and detection, and especially wartime can greatly improve out probability.
Since shielded layer of the invention is shielded using multilayer separately advancing type, is refined in structure, inside is led in cable work
The influence of body 1 is smaller, reduces to the thickness requirement of external jacket, greatly improves the stability and structure of cable on the whole
Performance.
Embodiment two: as shown in Fig. 2, the aircraft of the present embodiment instrumentation control radar coaxial cable, including from inside to outside successively
Conductor 1, insulating layer 2, aluminium-plastic tape shielded layer 3, interior woven shield 4, the braiding lubricant layer 5, outer woven shield of setting
6, inner sheath 7 and oversheath 8；It is twisted using hemicompact pressure type technique, the contact surface of each first silver-coated copper wire is increased, from resistance public affairs
It can be obtained in formula (R=ρ * L/S), the size and conductor length of conductor resistance are directly proportional, are inversely proportional with sectional area of wire and material
Resistivity is related；Same material and sectional area, conducting wire is longer, and resistance is bigger, same material and length, and sectional area is smaller (to lead
Line is thinner) resistance is bigger；So using 7 nominal diameters twisted for the first silver-coated copper wire of 0.82mm, reduce the electricity of cable
Resistance；Twisting process makes cable when being bent towards different directions, influences on the cross section of cable very small, moreover it is possible to keep good and lead
Electrical property does not generate biggish resistance variations with the direction structure variation of cable；Resistivity (ρ/n Ω of the metal at 20 DEG C
M) are as follows: silver-colored 15.86, copper 16.78, relative to other metal simple-substances, its electric conductivity is metal the most superior to silver with copper, therefore
Using silver-coated copper wire, its electric conductivity and conductive stability are considerably increased.Using copper wire silver plating process, silver layer is thicker, conductive
Performance is better.
Conductor 1 uses 7 nominal diameters to be twisted for the first silver-coated copper wire of 0.82mm, the first silver-coated copper wire it is silver-plated
Thickness degree at least 2um, 1 outer diameter of conductor are 2.45mm.Semi-directional or the polytetrafluoroethylene film of orientation are passed through after polyethylene film turning
Prolong and press, surface more smooth does not have lathe tool trace, and polytetrafluoroethylene (PTFE) is commonly referred to as " non-sticking lining " or " material easy to clean "；
Polytetrafluoroethylene (PTFE) has the characteristics that antiacid alkali resistant, resists various organic solvents, is practically insoluble in all solvents.Meanwhile polytetrafluoro
Ethylene has the characteristics that resistant to high temperature, its coefficient of friction is extremely low, so can make lubricant, conductor 1 and aluminium-plastic tape are shielded
Layer 3 is kept apart, and lubricating action is played；Polytetrafluoroethylene (PTFE) also has good insulating properties, therefore polytetrafluoroethylene film is used for capacitor
Device medium makees wire insulation, electrical instrumentation insulation, sealing gasket.It is used as isolation material in the present invention, and uses seamless wrapped side
Formula progress multilayer is wrapped, and the lapping direction of adjacent two layers polytetrafluoroethylene film is on the contrary, and controlling Duplication is 49% and poly- four
Within 1mm, every strata tetrafluoroethylene is wrapped all to reach complete sealing, phase in the gap of the left and right edges opposite joint of fluoride film
Wrapped Duplication than the prior art is 52%-56%, and final 2 flatness of insulating layer of the present invention is high, in strict control poly- four
It is not in that uneven situation, especially cable make when the gap of the left and right edges opposite joint of fluoride film is within 1mm
With when, when cable bend, due to being every layer of wrapped and adjacent layer lapping direction on the contrary, insulating layer 2 is a degree of curved
Drawing force and extruding force are more dispersed in bent situation, smaller to the active force of conductor 1, while also protecting the stable structure of conductor 1.It is poly-
The dielectric constant of tetrafluoroethylene is successively from by force to weak for orientation, semi-directional and non-directional, using semi-directional or orientation polytetrafluoro
Vinyl film is as insulating layer 2, because its insulation performance is more preferable than non-directional polytetrafluoroethylene film.
It is the semi-directional of 0.15mm or the polytetrafluoroethylene film of orientation using seamless wrapped side that insulating layer 2, which uses nominal thickness,
Formula carries out that multilayer is wrapped forms, and adjacent two layers polytetrafluoroethylene film lapping direction on the contrary, every layer of insulating layer 2 wrapped overlapping
The gap of the left and right edges opposite joint of polytetrafluoroethylene film controls within 1mm after rate is 49% and is wrapped, and the outer diameter of insulating layer 2 is
7.60mm.Nominal thickness is that the plastic-aluminum combined film of 0.10mm is very thin, and longitudinal wrap reduces deformation when cable bend, and then reduces
Influence to conductor 1, aluminium layer have good shield effectiveness, and two edges are completely covered for 35%, avoided out by Duplication
Existing sky drain region.3 one side of aluminium-plastic tape shielded layer, which is arranged, has shield effectiveness, if on the other hand interior woven shield 4 is straight
Wrapping insulation layer 2 is contacted, in braiding process, because the laying tension of the braided wires in processing, leads to braided wires
Insulating layer 2 is squeezed and forms braiding mark in wrapping insulation layer 2, structure is caused to the characteristic impedance and fade performance of cable
On damage；During cable Reusability, because having external broach and outer trampling power, braided wires is caused to squeeze insulating layer 2
And braiding mark is formed in wrapping insulation layer 2, and with using time and the frequency to increase, the mark of generation is deeper, makes cable
Performance gradually decreases, and greatly reduces rebecca maintenance and detection accuracy.
Aluminium-plastic tape shielded layer 3 uses nominal thickness to carry out one layer of longitudinal wrap for the plastic-aluminum combined film of 0.10mm, plastic-aluminum
The aluminum layer thickness of composite band shielded layer 3 is not less than 0.05mm and aluminium surface layer outwardly, and longitudinal wrap Duplication is 35%.Nominal thickness is
The plastic-aluminum combined film of 0.10mm is very thin, and longitudinal wrap reduces deformation when cable bend, and then reduces the influence to conductor 1, aluminium
Layer has good shield effectiveness, and Duplication completely covers two edges for 35%, avoids the occurrence of sky drain region.Plastic-aluminum is set
3 one side of composite band shielded layer has shield effectiveness, if on the other hand interior woven shield 4 directly contacts wrapping insulation layer 2,
Braiding process in because processing when braided wires laying tension, cause braided wires to insulating layer 2 squeeze and around
Packet insulating layer 2 forms braiding mark, and characteristic impedance and fade performance to cable cause the damage in structure；Cable repeatedly
In use process, because having external broach and outer trampling power, braided wires is caused to squeeze insulating layer 2 and formed in wrapping insulation layer 2
Mark is woven, and with using time and the frequency to increase, the mark of generation is deeper, gradually decreases the performance of cable, drops significantly
Low rebecca maintenance and detection accuracy.
Interior woven shield 4 uses nominal thickness to weave for the second silver-coated copper wire of 0.20mm, the plating of the second silver-coated copper wire
The count of silver thickness at least 2um, interior woven shield 4 are not less than 90%；The shield effectiveness of interior woven shield 4 depends on
In the count of interior woven shield 4, count is smaller, and shield effectiveness is poorer, and count is bigger, shield effectiveness
Better.Since the electric conductivity of silver is better than copper, the shield effectiveness of interior braiding layer is more preferable after silver-plated.Silver coating thickness is no less than 2um,
Preventing cable, silver coating is too thin because friction is easy to be worn in use, affects anti-interference when maintenance and detection
Can, affect testing result.
Braiding lubricant layer 5 uses nominal thickness to carry out being overlapped wrapped one layer for the non-directional polytetrafluoroethylene film of 0.15mm,
Wrapped Duplication is 35%；The tensile strength of polytetrafluoroethylene film is from big to small successively orientation, semi-directional and non-directional；Poly- four
The extension at break degree of fluoride film is successively non-directional, semi-directional and orientation from big to small；Therefore, polytetrafluoroethylene film is being used
When, non-directional polytetrafluoroethylene film is used by outer layer, uses semi-directional or orientation polytetrafluoroethylene film by inner layer.Weave lubricant layer
5 are between interior woven shield 4 and outer woven shield 6, in cable bend by interior woven shield 4 and outer braid shielded
The shearing force of layer 6 is big, so the non-directional polytetrafluoroethylene film strong using extension at break degree；Lean on inner layer insulating layer 2,
When cable bend, shearing force is very small, so using the big semi-directional of tensile strength or orientation polytetrafluoroethylene film.Due to poly- four
There is vinyl fluoride good lubricity to avoid interior braiding layer and outer braiding layer straight using polytetrafluoroethylene (PTFE) material as lubricant layer
Contact；Avoid cable during Reusability, because being frequently bended, interior braiding layer frequently rubs with outer braiding layer, causes to compile
The coating for knitting silk is worn, and affects interference free performance when maintenance and detection, affects testing result.
Outer woven shield 6 uses nominal thickness to weave for the second silver-coated copper wire of 0.18mm-0.20mm, the second silver-plated copper
The silver coating thickness at least 2um of line, the count of outer woven shield 6 are not less than 90%, and the material effects of outer braiding layer are former
Reason is the same as above-mentioned interior braiding layer.
Inner sheath 7 uses nominal thickness to carry out two layers according to seamless around packet mode for the polytetrafluoroethylraw raw material band of 0.10mm
Wrapped to form, the lapping direction of two layers of polytetrafluoroethylraw raw material band is on the contrary, and wrapped Duplication is 49%, every strata tetrafluoroethene
The gap of left and right edges opposite joint after raw material band is wrapped need to control within 1mm, inner sheath 7 with a thickness of 0.30mm.Polytetrafluoro
Ethylene raw material band is a kind of ideal sealing material of novelty, due to its nontoxic, tasteless, excellent leakproofness, insulating properties, corrosion resistant
Property, it is widely used in the fields such as water process, natural gas, chemical industry, plastics, electronic engineering.Polytetrafluoroethylene (PTFE) high and low temperature resistance
Superior, long-term use temperature reaches 200-260 DEG C, and low temperature reaches still soft at -100 DEG C, and polytetrafluoroethylraw raw material band has tough
Property it is good, longitudinal strength is high, lateral easily deformable feature；The gap of left and right edges opposite joint after polytetrafluoroethylraw raw material band is wrapped
It need to control within 1mm, and wrapped Duplication reaches 49%, outer screen is wrapped up well, is reached on circumferential surface
The effect of sealing.
Oversheath 8 is the perfluoroethylene-propylene layer that one layer of nominal thickness is 0.40mm, and perfluoroethylene-propylene layer is using extrusion
Technique is made, and 260 degree of polytetrafluoroethylene (PTFE) high temperature resistant, 200 degree of polyfluorinated ethylene membrane heatproof, perfluoroethylene-propylene is heat-fusible to be added
Work and polytetrafluoroethylene film is mainly formed with turnery processing, polyfluorinated ethylene membrane intensity be higher than polytetrafluoroethylene (PTFE), so
Using perfluoroethylene-propylene as oversheath 8 be because perfluoroethylene-propylene high temperature resistant and have good hot melt processability, make
For the outermost layer of cable, using being most stable of on extrusion process integrated formed structure；Oversheath 8 in respect to the background art
It using and squeezes out one layer of nominal thickness as the perfluoroethylene-propylene layer of 0.70mm, oversheath 8 of the invention is thinner compared to background technique,
Flexibility is more preferable, and difficulty and the time of installation are reduced in maintenance and detection, and especially wartime can greatly improve out probability.
Since shielded layer of the invention is shielded using multilayer separately advancing type, is refined in structure, inside is led in cable work
The influence of body 1 is smaller, reduces to the thickness requirement of external jacket, greatly improves the stability and structure of cable on the whole
Performance.
Graphite micropowders, position in graphite micropowders particle are filled in interior woven shield 4 and outer woven shield 6
Diameter is less than 1um, is provided with separation layer 9 between outer woven shield 6 and inner sheath 7, separation layer 9 use nominal thickness for
The non-directional polytetrafluoroethylene film of 0.15mm carries out being overlapped wrapped one layer, and wrapped Duplication is 35%.Graphite micropowders have
Good conductive and heat-conductive and greasy property, are filled in interior woven shield 4 and outer woven shield 6, greatly improve interior volume
Knit the shielding properties of shielded layer 4 and outer woven shield 6, the electromagnetic wave of different frequency and different wave length passes through interior woven shield
4 and when outer woven shield 6, graphite micropowders have good wave-absorbing effect, and internally woven shield 4 and outer braiding
The supplement of the shielding properties of shielded layer 6.Graphite micropowders therefore special structure, have good greasy property, add stone
Black micropowders reduce the abrasion of the second silver-coated copper wire of interior woven shield 4 and outer woven shield 6 to each other, cable
In use, braiding layer stretches and generates bigger void area in cable bend drawing process, and graphite micropowders can be very well
Filling void area, reduce to the shield effectiveness of shielded layer.Separation layer 9 is set, outer braiding layer and inner sheath 7 are kept apart,
Prevent graphite micropowders from entering 7 layers of inner sheath.
Inner sheath 7 is added with absorbing material, and absorbing material is polycrystalline iron fiber absorbent, ferrite wave-absorbing material, nanometer
The one or more of antiradar coatings.Electromagnetic wave is made of orthogonal magnetic field and electric field, and the mechanism of action is divided into following 3 kinds:
1, high-permeability material can make the magnetic-field component in electromagnetic wave be converted to thermal losses to fall；2 or make electromagnetism with high conductivity material
Electric field component in wave is converted to thermal losses and falls,；3, the electric and magnetic fields in electromagnetic wave are converted to heat using Energy dissipating material
Amount loses.Absorbing material is added in inner sheath 7, as the first screen layer of cable, is added according to different absorbing materials, it can
To reach the filter effect of inner sheath 7 from low to high.
A kind of preparation method for inhaling wave inner sheath is also disclosed in the present embodiment, comprising the following steps:
Step 1: absorbing material is carried out grinding with ball mill, it is 100nm that gained, which inhales wave powder particles median diameter,；Inhale wave
Powder reaches Nano grade, can preferably disperse in polyflon, meanwhile, absorbing material reaches Nano grade, filtering
Effect is more preferable；For the wavelength of electromagnetic wave from microwave to long wave, span is bigger, and cable used in aircraft can face different environment, inhales
Wave powder particles median diameter is good wave filtering effect of the 100nm to microwave.
It is mixed step 2: wave powder will be inhaled obtained by the first step and be added by weight part 30% into polyflon,
Even dispersion prepares paste resin；Weight ratio part 30% not only has good filter effect, but also most terminates to polytetrafluoroethylraw raw material band
Structure influences less, and weight ratio part such as continues to increase, and can seriously affect the structural behaviour of polytetrafluoroethylraw raw material band.
Step 3: paste resin is carried out heating stirring to rise 50 DEG C of temperature per hour, and finally it is warmed as 340 DEG C；
Polytetrafluoroethylraw raw material band is polytetrafluoroethyldispersion dispersion resin in ingredient, calendering, heating drawing process, the band without sintering
Son is raw material band, and heating rate is too fast to be easy to cause polytetrafluoroethylene (PTFE) to decompose, and at normal temperature, final temperature is such as more than 370 DEG C
Polytetrafluoroethyldispersion dispersion resin then starts to be sintered, and performance can also change correspondingly.
Step 4: paste resin is rolled and stretched after third step is heated, the polytetrafluoroethyl-ne with filter function is made
Alkene raw material band.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of aircraft instrumentation control radar coaxial cable, it is characterised in that: including set gradually from inside to outside conductor (1), absolutely
It is edge layer (2), aluminium-plastic tape shielded layer (3), interior woven shield (4), braiding lubricant layer (5), outer woven shield (6), interior
Sheath (7) and oversheath (8).
2. the conductor (1) uses 7 nominal diameters to be twisted for the first silver-coated copper wire of 0.82mm, first silver-plated copper
The silver coating thickness at least 2um of line, conductor (1) external diametrical extent are 2.40mm-2.45mm.
3. aircraft instrumentation control radar coaxial cable according to claim 1, it is characterised in that: the insulating layer (2) is using mark
Claim with a thickness of the semi-directional of 0.05mm-0.15mm or the polytetrafluoroethylene film of orientation using seamless wrapped around packet mode progress multilayer
It forms, and the lapping direction of adjacent two layers polytetrafluoroethylene film is on the contrary, the wrapped Duplication range of every layer of the insulating layer (2) is
The gap of the left and right edges opposite joint of 46%-49% and wrapped rear polytetrafluoroethylene film controls the insulating layer (2) within 1mm
External diametrical extent be 7.40mm-7.60mm.
4. aircraft instrumentation control radar coaxial cable according to claim 1, it is characterised in that: the aluminium-plastic tape shielded layer
(3) nominal thickness is used to carry out one layer of longitudinal wrap for the plastic-aluminum combined film of 0.07mm-0.10mm, the aluminium-plastic tape shielded layer
(3) aluminum layer thickness is not less than 0.05mm and aluminium surface layer outwardly, and longitudinal wrap Duplication is 20%-35%.
5. aircraft instrumentation control radar coaxial cable according to claim 1, it is characterised in that: the interior woven shield (4)
Nominal thickness is used to weave for the second silver-coated copper wire of 0.18mm-0.20mm, the silver coating thickness of second silver-coated copper wire is extremely
The count of few 2um, the interior woven shield (4) are not less than 90%；
Braiding lubricant layer (5) uses nominal thickness to be overlapped for the non-directional polytetrafluoroethylene film of 0.05mm-0.15mm
Wrapped one layer, wrapped Duplication range is 20%-35%；
The outer woven shield (6) uses nominal thickness to weave for the second silver-coated copper wire of 0.18mm-0.20mm, and described second
The count of the silver coating thickness at least 2um of silver-coated copper wire, the outer woven shield (6) are not less than 90%.
6. aircraft instrumentation control radar coaxial cable according to claim 1, it is characterised in that: the inner sheath (7) is using mark
Claim with a thickness of 0.05mm-0.10mm polytetrafluoroethylraw raw material band according to it is seamless around packet mode carry out two layers it is wrapped form, two layers
The lapping direction of the polytetrafluoroethylraw raw material band is on the contrary, and wrapped Duplication range is 46%-49%, every layer of polytetrafluoro
The gap of left and right edges opposite joint after ethylene raw material band is wrapped need to control within 1mm, and the thickness range of the inner sheath (7) is
0.20mm-0.30mm。
7. aircraft instrumentation control radar coaxial cable according to claim 1, it is characterised in that: the oversheath (8) is one layer
Nominal thickness is the perfluoroethylene-propylene layer of 0.40mm, and the perfluoroethylene-propylene layer is made of extrusion process, the outer shield
Set (8) external diametrical extent is 10.50mm-11.50mm.
8. aircraft instrumentation control radar coaxial cable according to claim 5, it is characterised in that: the interior woven shield (4)
Interior filled with graphite micropowders with outer woven shield (6), the graphite micropowders particle median diameter is less than 1um, institute
State and be provided between outer woven shield (6) and inner sheath (7) separation layer (9), the separation layer (9) use nominal thickness for
The non-directional polytetrafluoroethylene film of 0.05mm-0.15mm carries out being overlapped wrapped one layer, and wrapped Duplication range is 20%-35%.
9. aircraft instrumentation control radar coaxial cable according to claim 6, it is characterised in that: the inner sheath (7) is added with
Absorbing material, the absorbing material are one kind or several of polycrystalline iron fiber absorbent, ferrite wave-absorbing material, nano wave-absorption coating
Kind.
10. a kind of preparation method for inhaling wave inner sheath as claimed in claim 9, which comprises the following steps:
Step 1: absorbing material is carried out grinding with ball mill, it is 100nm that gained, which inhales wave powder particles median diameter,；
It is mixed step 2: wave powder will be inhaled obtained by the first step and be added by weight part 20%-40% into polyflon,
Even dispersion prepares paste resin；
Step 3: paste resin is carried out heating stirring to rise 50 DEG C of temperature per hour, and final heating must not exceed 350
℃；
Step 4: paste resin is rolled and stretched after third step is heated, it is raw that the polytetrafluoroethylene (PTFE) with filter function is made
Material strip.
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| CN112309635A (en) * | 2020-10-09 | 2021-02-02 | 滁州润翰微波科技有限公司 | Cable wrapping process for preventing cable medium from shrinking |
| CN112820468A (en) * | 2020-12-31 | 2021-05-18 | 中国人民解放军96901部队23分队 | Low-noise high-shielding fA-level current signal cable for radiation environment and manufacturing process |
| CN113066616A (en) * | 2021-03-31 | 2021-07-02 | 福建微波通通信技术有限公司 | Production process and processing device of microwave coaxial cable and cable |
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| CN112309635A (en) * | 2020-10-09 | 2021-02-02 | 滁州润翰微波科技有限公司 | Cable wrapping process for preventing cable medium from shrinking |
| CN112820468A (en) * | 2020-12-31 | 2021-05-18 | 中国人民解放军96901部队23分队 | Low-noise high-shielding fA-level current signal cable for radiation environment and manufacturing process |
| CN113066616A (en) * | 2021-03-31 | 2021-07-02 | 福建微波通通信技术有限公司 | Production process and processing device of microwave coaxial cable and cable |
| CN113066616B (en) * | 2021-03-31 | 2022-06-14 | 福建微波通通信技术有限公司 | Production method of microwave coaxial cable and cable |
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