CN215007560U

CN215007560U - Cable for aerospace

Info

Publication number: CN215007560U
Application number: CN202121059492.3U
Authority: CN
Inventors: 王文渊; 姚亮; 张海艳; 张爱生
Original assignee: Anhui Keshun Cable Power Intelligent Technology Co Ltd
Current assignee: Anhui Keshun Cable Power Intelligent Technology Co Ltd
Priority date: 2021-05-18
Filing date: 2021-05-18
Publication date: 2021-12-03
Anticipated expiration: 2031-05-18

Abstract

The utility model discloses a cable for aerospace relates to the aviation cable field, including sheath, the shielding layer that outside-in set gradually, the inside a plurality of conductors that set up of shielding layer, the outside cladding of conductor has the insulating layer, outside-in sets gradually waterproof layer and flame retardant coating between sheath and the shielding layer, the shielding layer is the copper wire alternately weaves the braided shielding layer that forms, and the braided angle of shielding layer is 60-72 degrees, the conductor is formed by the copper wire transposition that a plurality of diameters are 0.05-0.08 mm. The utility model discloses can solve current aviation cable anti buckle poor, the fire resistance is poor, waterproof performance is poor, anti vibration ability is poor, the temperature resistant level is lower, crack resistance is poor and the poor problem of radiation resistance.

Description

Cable for aerospace

Technical Field

The utility model relates to an aviation cable field especially relates to a cable for aerospace.

Background

The aviation cable is mainly used for providing power support for spacecrafts such as airplanes. Currently used aviation cables have the following disadvantages:

1. the flexibility of the conductor of the aviation cable used at present is poor, the resistance to bending and vibration is poor in the using process, and the aviation cable can have the conductor fracture condition after being bent for many times.

2. The aviation cable used at present has poor fire resistance and water resistance.

3. The sheath material of the currently used aviation cable has low temperature resistance level, and poor cracking resistance and radiation resistance.

4. The shielding layer of the currently used aviation cable is generally a winding shielding layer, the shielding effect of the winding shielding layer has directionality, the shielding capability is reduced when the cable is bent, and the cable is only suitable for low-frequency shielding; the shielding layer of some aviation cables is a braided shielding layer, the braided shielding layer used at present is a conductor monofilament which is braided in a crossed manner, and the included angle between the monofilaments, namely the braiding angle, is small, so that the braided shielding layer has the disadvantages of high hardness, small expansion ratio and poor flexibility, and when the cable is bent, the braided shielding layer has poor bending resistance and vibration resistance.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a cable for aerospace is provided, solve current aviation cable anti buckle poor, the fire resistance is poor, waterproof performance is poor, anti vibration ability is poor, temperature resistant level is lower, crack resistance is poor and radiation resistance is poor problem.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a cable for aerospace, includes sheath, the shielding layer that outside-in set gradually, the inside a plurality of conductors that set up of shielding layer, the outside cladding of conductor has the insulating layer, outside-in sets gradually waterproof layer and flame retardant coating between sheath and the shielding layer, the shielding layer is the copper wire and alternately weaves the braided shielding layer that forms, and the braided angle of shielding layer is 60-72 degrees, the conductor is formed by the copper wire transposition that a plurality of diameters are 0.05-0.08 mm.

Furthermore, the waterproof layer is made of polyethylene polypropylene.

Furthermore, a water-blocking paste is filled between the shielding layer and the insulating layer.

Furthermore, the fire-resistant layer is made of glass fiber yarns or mica powder.

Furthermore, the sheath and the insulating layer are both made of irradiation cross-linked ethylene-tetrafluoroethylene.

Furthermore, the copper wires of the shielding layer and the conductor are silver-plated soft round copper wires.

Further, the braid angle of the shielding layer is 70 degrees.

Furthermore, the conductor is formed by stranding a plurality of copper wires with the diameter of 0.08 mm.

Further, the thickness of the waterproof layer is 0.27-0.39 cm.

The utility model discloses following beneficial effect has:

the utility model discloses a conductor of cable for aerospace is twisted by a plurality of diameters and is formed for the soft round copper wire of silver-plating of 0.05-0.08mm, and the soft round copper wire of silver-plating of 0.05-0.08mm is the soft round copper wire of superfine silver-plating, and the structure after its transposition can effectively reduce the hardness of conductor, belongs to super soft texture, makes the conductor have bending fatigue fracture resistance's ability.

The utility model discloses a cable for aerospace sets up the waterproof layer in the sheath, packs between shielding layer and insulating layer and has the water blocking cream, can effectively improve the waterproof ability of cable; the utility model discloses a cable for aerospace sets up the flame retardant coating in the waterproof layer, can effectively improve the fire-resistant ability of cable.

The utility model discloses a material of the sheath of cable for aerospace and insulating layer is irradiation crosslinked ethylene-tetrafluoroethylene, and irradiation crosslinked ethylene-tetrafluoroethylene (X-ETFE) compares and is inside to be changed into macromolecule network structure by macromolecule linear structure in PTFE and FEP of present generally used. The X-ETFE has higher temperature resistance level, stronger crack resistance and radiation resistance.

The utility model discloses a shielding layer of cable for aerospace is the copper wire and alternately weaves the braided shielding layer that forms, and the angle of weaving of shielding layer is 60-72 degrees. When the braided angle is 60-72 degrees, the hardness of the braided shielding layer is small, the expansion ratio is large, the flexibility is good, and when the cable is bent, the bending resistance and the vibration resistance of the braided shielding layer are strong.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic diagram of a shielding layer structure.

Detailed Description

Example 1:

as shown in fig. 1 and 2, a cable for aerospace, includes sheath 1, shielding layer 4 that outside-in set gradually, shielding layer 4 is inside to set up a plurality of conductors 7, the outside cladding of conductor 7 has insulating layer 6, outside-in sets gradually waterproof layer 2 and flame retardant coating 3 between sheath 1 and the shielding layer 4, shielding layer 4 is the copper wire and alternately weaves the woven shield who forms, and shielding layer 4's weaving angle is 60-72 degrees, conductor 7 is formed by the copper wire transposition that a plurality of diameters are 0.05-0.08 mm.

And when the number of the copper wires forming the single conductor is not more than 75, twisting the copper wires by adopting a bunching method. When the number of the copper wires forming a single conductor exceeds 75, the copper wires are stranded in a mode of first bundling and then multiple stranding.

The waterproof layer 2 is made of polyethylene or polyethylene polypropylene.

The polyethylene and the polyethylene polypropylene are both better waterproof materials.

And a water-blocking paste 5 is filled between the shielding layer 4 and the insulating layer 6.

The water-blocking paste 5 is used as a second water-blocking defense line, so that the waterproof performance of the cable is further improved.

The fire-resistant layer 3 is made of glass fiber yarns or mica powder.

The glass fiber yarns and the mica powder are good fire-resistant materials, and the glass fiber yarns and the mica powder are low in density, so that the overall density of the cable can be reduced, and the cable is suitable for aviation.

The sheath 1 and the insulating layer 6 are both made of irradiation cross-linked ethylene-tetrafluoroethylene.

The irradiation-resistant dose of the irradiation cross-linked ethylene-tetrafluoroethylene can reach 500Mrad, and the irradiation cross-linked ethylene-tetrafluoroethylene can be suitable for the high-energy irradiation environment of outer space. The tensile strength of the irradiation crosslinked ethylene-tetrafluoroethylene can reach 34-60Mpa, and the short circuit allowable temperature can reach 310%^oC。

The copper wires of the shielding layer 4 and the conductor 7 are silver-plated soft round copper wires.

The silver-plated soft round copper wire has excellent electrical conductivity, thermal conductivity, corrosion resistance and high-temperature oxidation resistance. The silver-plated round soft copper wire is annealed to change the physical characteristics of the round soft copper wire so as to achieve the purpose of softening.

The braid angle of the shield layer 4 is 70 degrees.

The relationship between the knitting angle and the knitting softness is as follows: when the weaving paying-off tension is constant, the larger the weaving angle is, the smaller the pressure of the weaving wire in the weaving layer is, which is equivalent to the looser the bidirectional winding of the weaving wire is, and the relative sliding resistance between the shielding layer and the insulating layer is smaller when the conductor monofilament bends, so that the flexibility of the shielding layer is better. However, the weaving angle should not be too large, and the too large weaving angle not only can cause loose weaving of the shielding layer, reduce the stability of the weaving structure and bring a lot of adverse effects to the subsequent sheath process, but also can reduce the flexibility of the shielding layer. Through a plurality of tests, test data show that when the weaving angle is 70 degrees, the shielding layer can achieve the highest softness and has better stability.

The conductor 7 is formed by stranding a plurality of copper wires with the diameter of 0.08 mm.

The conductor made of the copper wire with the diameter smaller than 0.08mm can achieve higher flexibility, but the copper wire with the diameter smaller than 0.08mm is too high in production cost and poor in economical efficiency.

The thickness of the waterproof layer 2 is 0.27-0.39 cm.

During the in-service use, waterproof layer 2's thickness is 0.28cm, and the waterproof layer of 0.28cm thickness can improve the holistic structural stability of resistant ability and the cable of buckling of cable under the prerequisite of guaranteeing that the cable has waterproof performance.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any person skilled in the art can make some changes or modifications to equivalent embodiments with equivalent changes without departing from the technical scope of the present invention, but all those persons do not depart from the technical spirit of the present invention, and any simple modifications, equivalent replacements, and improvements made to the above embodiments are within the spirit and principle of the present invention, and still belong to the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a cable for aerospace, includes sheath (1), shielding layer (4) that outside-in set gradually, shielding layer (4) inside sets up a plurality of conductors (7), the outside cladding of conductor (7) has insulating layer (6), a serial communication port, outside-in sets gradually waterproof layer (2) and flame retardant coating (3) between sheath (1) and shielding layer (4), shielding layer (4) are the copper wire alternately woven and weave the shielding layer that forms, and the braid angle of shielding layer (4) is 60-72 degrees, conductor (7) are formed by the copper wire transposition that a plurality of diameters are 0.05-0.08 mm.

2. An aerospace cable according to claim 1, wherein the waterproof layer (2) is made of polyethylene polypropylene.

3. An aerospace cable according to claim 1, wherein a water blocking paste (5) is filled between the shielding layer (4) and the insulating layer (6).

4. The aerospace cable of claim 1, wherein the fire resistant layer (3) is made of fiberglass yarn or mica powder.

5. An aerospace cable according to claim 1, wherein the sheath (1) and the insulating layer (6) are both radiation cross-linked ethylene-tetrafluoroethylene.

6. An aerospace cable according to claim 1, wherein the copper wires of the shielding layer (4) and the conductor (7) are silver-plated soft round copper wires.

7. An aerospace cable according to claim 1, wherein the shielding layer (4) has a braid angle of 70 degrees.

8. An aerospace cable according to claim 1, wherein the conductor (7) is formed by stranding a plurality of copper wires having a diameter of 0.08 mm.

9. An aerospace cable according to claim 1 or 2, wherein the water barrier layer (2) has a thickness of 0.27-0.39 cm.