CN215577743U

CN215577743U - Tensile and vibration-resistant high-temperature wire

Info

Publication number: CN215577743U
Application number: CN202120613095.XU
Authority: CN
Inventors: 杨林臻; 邹明; 张公卓
Original assignee: Hunan Valin Wire and Cable Co Ltd
Current assignee: Hunan Valin Wire and Cable Co Ltd
Priority date: 2021-03-26
Filing date: 2021-03-26
Publication date: 2022-01-18
Anticipated expiration: 2031-03-26

Abstract

The utility model discloses a tensile and shock-resistant high-temperature electric wire, which comprises a cable core and a combined sheath wrapped outside the cable core, a shielding layer is arranged between the cable core and the combined sheath, the cable core is formed by twisting a plurality of insulated wire cores, the insulation wire core comprises a conductor and a combined insulation layer wrapped outside the conductor, the combined insulation layer comprises an inner single-side calcined mica tape layer, a composite film layer and an inner aramid fiber braided layer which are wrapped from inside to outside, the combined sheath comprises an outer single-side calcined mica tape layer, an outer aramid fiber woven layer and a fluorinated ethylene propylene layer which are wrapped from inside to outside, the tensile and vibration-resistant high-temperature electric wire is provided with the aramid fiber woven layers in the insulating layer and the sheath layer, the tensile and vibration-resistant performance of the product can be greatly improved, the metal braided shielding layer is arranged in the wire, so that the product can meet the requirement of isolating external electromagnetic interference.

Description

Tensile and vibration-resistant high-temperature wire

Technical Field

The utility model relates to the technical field of cables, in particular to a tensile and vibration-resistant high-temperature wire.

Background

At present, the high-temperature wire for the aerospace aircraft has the following conditions: because the structure is not provided with the tensile element, the wire harness can only be used in a general high-temperature environment, and a designer can only place the tensile element outside the wire harness for a place with a tensile vibration requirement, so that the difficulty in processing the wire harness is improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problem that the tensile resistance of a high-temperature wire for an aerospace aircraft is insufficient in the prior art, and provides a tensile and vibration-resistant high-temperature wire.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the tensile and vibration-resistant high-temperature electric wire comprises a cable core and a combined sheath wrapped outside the cable core, wherein a shielding layer is arranged between the cable core and the combined sheath.

Specifically, the cable core is formed by stranding a plurality of insulating wire cores. The insulation wire core comprises a conductor and a combined insulation layer wrapped outside the conductor.

Wherein, the conductor adopts 19 nominal diameter to be 0.14 mm's nickel-plated copper line transposition to form, nickel-plated layer thickness of nickel-plated copper line is 0.2um at least. And a semi-pressing or pressing mode is adopted in the conductor twisting process, so that the conductor is round, and the outer diameter is smaller than that calculated conventionally.

The combined insulating layer comprises an inner single-side calcined mica tape layer, a composite film layer and an inner aramid fiber woven layer which are wrapped from inside to outside. Wherein the mica content of the single-side calcined mica tape in the inner single-side calcined mica tape layer is 80 +/-5 g/m²The quartz content is 24 +/-3 g/m²The temperature resistance is more than or equal to 1000 ℃. The aramid filaments of the inner aramid filament woven layer are subjected to Kevlar drawing. The composite film layer is a polytetrafluoroethylene/polyimide/polytetrafluoroethylene composite film, and the minimum tensile strength of the composite film in the composite film layer is 80.0 MPa.

Furthermore, the four insulated wire cores are twisted to form a cable core, and the shielding layer is directly wrapped outside the cable core. The shielding layer is formed by adopting an inclined package of a nickel-plated copper wire with the nominal diameter of 0.10-0.12mm, the thickness of a nickel-plated layer of the nickel-plated copper wire is at least 0.2um, and the density of the inclined package is not less than 95%.

Furthermore, the combined sheath comprises an outer single-side calcined mica tape layer, an outer aramid fiber silk braid layer and a fluorinated ethylene propylene layer which are wrapped from inside to outside. Wherein the mica content of the single-side calcined mica tape in the outer single-side calcined mica tape layer is 80 +/-5 g/m²The quartz content is 24 +/-3 g/m²The temperature resistance is more than or equal to 1000 ℃. The aramid filaments of the outer aramid filament woven layer are subjected to Kevlar drawing. The minimum tensile strength of the perfluoroethylene-propylene copolymer in the perfluoroethylene-propylene copolymer layer 33 was 21.0 MPa.

The outer diameter of the finished product wire is not more than 6.50 mm.

Compared with the prior art, the utility model has the beneficial effects that:

1. this high temperature electric wire of shock-resistant tensile has all set up fragrant lun silk weaving layer in insulating layer and restrictive coating, can improve the shock resistance of tensile of product greatly.

2. This high temperature electric wire of shock-resistant tensile has set up the metal braid shielding layer, makes the product can satisfy the requirement that isolated outside electromagnetic interference is required.

Drawings

FIG. 1 is a schematic structural diagram of the tensile and shock-resistant high-temperature wire;

fig. 2 is a schematic structural view of the tensile and shock-resistant high-temperature wire insulated wire core.

In the figure: 1. an insulated wire core; 2. a shielding layer; 3. combining the sheaths; 11. a conductor; 12. combining the insulating layers; 121. calcining a mica tape layer on the inner single surface; 122. compounding a film layer; 123. an inner aramid fiber yarn braid layer; 31. calcining a mica tape layer on the outer single surface; 32. an outer aramid fiber braid; 33. A layer of fluorinated ethylene propylene.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1 and 2, the tensile and vibration-resistant high-temperature electric wire comprises a cable core and a combined sheath 3 wrapped outside the cable core, wherein a shielding layer 2 is arranged between the cable core and the combined sheath 3.

Specifically, the cable core is formed by stranding a plurality of insulating wire cores 1. The insulated wire core 1 comprises a conductor 11 and a combined insulating layer 12 wrapping the outside of the conductor 11.

The conductor 11 is formed by twisting 19 nickel-plated copper wires with the nominal diameter of 0.14mm, and the thickness of a nickel plating layer of each nickel-plated copper wire is at least 0.2 um. The semi-compact or compact mode is adopted in the twisting process of the conductor 11, so that the conductor 11 is round, and the outer diameter is smaller than the outer diameter calculated conventionally.

The combined insulating layer 12 comprises an inner single-side calcined mica tape layer 121, a composite film layer 122 and an inner aramid fiber woven layer 123 which are wrapped from inside to outside. Wherein the mica content of the single-sided calcined mica tape in the inner single-sided calcined mica tape layer 121 is 80 +/-5 g/m²The quartz content is 24 +/-3 g/m²The temperature resistance is more than or equal to 1000 ℃. The aramid filaments of the inner aramid filament braid layer 123 are Kevlar drawn wires. The composite film layer 122 is a polytetrafluoroethylene/polyimide/polytetrafluoroethylene composite film, and the minimum tensile strength of the composite film in the composite film layer 122 is 80.0 MPa.

The process steps for forming the combined insulating layer 12 are as follows:

a1: a layer of inner single-side calcined mica tape with the nominal thickness of 0.10mm is wrapped on the conductor 11, the mica surface faces inwards during wrapping, the wrapping overlapping rate is not less than 45%, and an inner single-side calcined mica tape layer 121 is formed.

A2: and a polytetrafluoroethylene/polyimide/polytetrafluoroethylene composite film with the nominal thickness of 0.0305mm is wound outside the inner single-side calcined mica tape layer 121, and the winding overlapping rate is not less than 50% to form a composite film layer 122.

A3: the aramid fiber yarns are woven outside the composite film layer 122, the weaving density is not less than 95%, the weaving thickness is 0.20-0.30mm, and an inner aramid fiber yarn weaving layer 123 is formed.

Furthermore, the four insulated wire cores are twisted to form a cable core, and the shielding layer 2 is directly wrapped outside the cable core. The shielding layer 2 is formed by adopting a nickel-plated copper wire with the nominal diameter of 0.10-0.12mm to be coated in an inclined way, the thickness of a nickel-plated layer of the nickel-plated copper wire is at least 0.2um, and the density of the inclined coating is not less than 95%.

Further, the combined sheath 3 comprises an outer single-side calcined mica tape layer 31, an outer aramid fiber silk braid layer 32 and a fluorinated ethylene propylene layer 33 which are wrapped from inside to outside. Wherein the mica content of the single-sided calcined mica tape in the outer single-sided calcined mica tape layer 31 is 80 +/-5 g/m²The quartz content is 24 +/-3 g/m²The temperature resistance is more than or equal to 1000 ℃. The aramid filaments of the outer aramid filament woven layer 32 are Kevlar drawn filaments. The minimum tensile strength of the perfluoroethylene-propylene copolymer in the perfluoroethylene-propylene copolymer layer 33 was 21.0 MPa.

The forming process of the combined sheath 3 comprises the following steps:

b1: and (3) wrapping a layer of inner single-side calcined mica tape with the nominal thickness of 0.10mm outside the shielding layer 2, wherein the mica surface faces inwards during wrapping, the wrapping overlapping rate is not less than 45%, and an outer single-side calcined mica tape layer 31 is formed.

B2: and (3) knitting the outer single-side calcined mica tape layer 31 by adopting the aramid yarn, wherein the knitting density is not less than 95%, and the knitting thickness is 0.20-0.30mm to form an outer aramid yarn knitting layer 32.

B3: and a layer of fluorinated ethylene propylene with the thickness of 0.25mm is extruded outside the outer aramid fiber woven layer 32.

The outer diameter of the finished product wire is not more than 6.50 mm.

The tensile and vibration-resistant high-temperature wire in the embodiment is provided with the aramid fiber braided layers in the insulating layer and the sheath layer, so that the tensile and vibration-resistant performance of the product can be greatly improved; the wire is also provided with a metal braided shielding layer, so that external electromagnetic interference can be effectively isolated.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. The tensile and vibration-resistant high-temperature electric wire is characterized by comprising a cable core and a combined sheath (3) wrapped outside the cable core, wherein a shielding layer (2) is arranged between the cable core and the combined sheath (3), and the cable core is formed by twisting a plurality of insulating wire cores (1);

the insulation wire core (1) comprises a conductor (11) and a combined insulation layer (12) wrapped outside the conductor (11), wherein the combined insulation layer (12) comprises an inner single-side calcined mica tape layer (121), a composite film layer (122) and an inner aramid fiber braided layer (123) which are wrapped from inside to outside;

the combined sheath (3) comprises an outer single-side calcined mica tape layer (31), an outer aramid fiber silk braid layer (32) and a fluorinated ethylene propylene layer (33) which are wrapped from inside to outside.

2. A tensile, shock-resistant and high-temperature electric wire as claimed in claim 1, wherein said conductor (11) is stranded of 19 nickel-plated copper wires having a nominal diameter of 0.14mm, said nickel-plated copper wires having a nickel-plating layer thickness of at least 0.2 μm.

3. The high-temperature wire with tensile and shock resistance as claimed in claim 1, wherein the composite film layer (122) is a polytetrafluoroethylene/polyimide/polytetrafluoroethylene composite film.

4. The high-temperature electric wire with the tensile and shock resistance as claimed in claim 1, wherein the aramid filaments of the inner aramid filament woven layer (123) and the outer aramid filament woven layer (32) are Kevlar drawn wires.

5. A tensile, shock-resistant and high-temperature electric wire according to claim 1, wherein said cable core is formed by stranding four said insulated wire cores (1).

6. The high-temperature wire with tensile and vibration resistance as claimed in claim 1, wherein the shielding layer (2) is formed by obliquely wrapping a nickel-plated copper wire with a nominal diameter of 0.10-0.12mm, the nickel-plated copper wire has a nickel-plating layer thickness of at least 0.2um, and the obliquely wrapping density is not less than 95%.

7. A tensile and shock-resistant high-temperature electric wire according to claim 1, wherein the thickness of said layer (33) of fluorinated ethylene propylene is 0.25 mm.