CN216817851U

CN216817851U - Special space flight for aviation PTFE insulated cable of military project

Info

Publication number: CN216817851U
Application number: CN202123143707.2U
Authority: CN
Inventors: 蒋陆肄; 许翔; 郑晓城; 郑晓彬; 赵明祥; 孟琨; 郑文彬; 许磊; 冯年瑞
Original assignee: Yunnan Duobao Cable Group Co ltd
Current assignee: Yunnan Duobao Cable Group Co ltd
Priority date: 2021-12-14
Filing date: 2021-12-14
Publication date: 2022-06-24
Anticipated expiration: 2031-12-14

Abstract

The utility model provides a PTFE insulated cable for aerospace special for military industry, which comprises a cable core, and a shielding layer and a sheath layer outside the cable core, wherein the cable core comprises a plurality of conductor components, filling support members for supporting the conductor components, and filling layers filled between the conductor components and the filling support members; the conductor assembly comprises an inner conductor and an inner insulating layer, the outer part of the inner insulating layer is a filling layer for wrapping the inner insulating layer, and a wrapping layer, an outer insulating layer, a shielding layer, a metal braid layer and a sheath layer are sequentially arranged outside the filling layer; the inner insulating layer is made of PTFE material; the sheath layer is made of irradiation cross-linked ethylene-tetrafluoroethylene copolymer material. The utility model has small volume, light weight, radiation resistance and higher temperature resistance, correspondingly improves the current-carrying capacity of the cable, can select the wire cable with smaller section under the condition of transmitting the same current, and achieves the purpose of reducing the outer diameter and the weight. The insulating layer and the shielding layer respectively adopt a double-layer structure, so that the reliability of electrical performance and mechanical performance is improved.

Description

Special space flight for aviation PTFE insulated cable of military project

Technical Field

The utility model relates to the field of space cables, in particular to a PTFE (polytetrafluoroethylene) insulated cable special for aerospace and aviation in military industry.

Background

With the rapid development of the aerospace industry in China, more and more aviation airplanes and spaceships are developed and researched, and play a very important role as cables for transmitting electric energy and information for a control system of the aviation airplanes and the spaceships, because the use environments of the cables adopted by the aviation airplanes and the spaceships are special, the cables are generally required to have the harsh conditions of excellent high and low temperature resistance, scratch and abrasion resistance, high conductivity, small outer diameter, light weight, high strength, cutting resistance, corrosion resistance, radiation resistance, long service life and the like, and meanwhile, under the condition of ensuring that the performance is not changed, the cable insulation and the sheath are required to have the advantages of thin thickness, small outer diameter, good conductivity, light weight and unlimited production length.

SUMMERY OF THE UTILITY MODEL

The utility model provides a PTFE insulated cable for aerospace and aviation special for military industry, which can reduce the volume and weight under the condition of ensuring the insulation and shielding performance.

The technical scheme of the utility model is realized as follows: a PTFE insulated cable for aerospace special for military industry comprises a cable core, and a shielding layer and a sheath layer outside the cable core, wherein the cable core comprises a plurality of conductor assemblies, filling support members for supporting the conductor assemblies, and filling layers filled between the conductor assemblies and the filling support members; the conductor assembly comprises an inner conductor and an inner insulating layer, the outer part of the inner insulating layer is a filling layer wrapping the inner insulating layer, and a wrapping layer, an outer insulating layer, a shielding layer, a metal braiding layer and a sheath layer are sequentially arranged outside the filling layer; the inner insulating layer is made of PTFE material; the sheath layer is made of irradiation crosslinking ethylene-tetrafluoroethylene copolymer material.

Preferably, the inner conductor is a tin-plated copper wire, and the inner insulating layer is a polyimide composite film with PTFE coated on both sides of the inner conductor.

Preferably, the wrapping layer is a PTFE wrapping tape wound outside the filling layer; the outer insulating layer is a thin-wall PEEK insulating material extruded outside the wrapping layer.

Preferably, the number of the conductor assemblies is four, the filling support is in a cross-shaped structure, and the four conductor assemblies are respectively located in four cavities of the filling support.

Preferably, the inner conductor is a tinned copper wire, the filling layer is a nylon filling strip with a compression-resistant effect, and the filling support piece is an integrally formed cross-shaped rubber gasket.

Preferably, the shielding layer is a copper wire braided layer plated with silver by annealing; the metal woven layer is a carbon fiber metal-plated copper foil wire woven sleeve.

Compared with the prior art, the utility model has the advantages that: the utility model has small volume, light weight, radiation resistance and higher temperature resistance, correspondingly improves the current-carrying capacity of the cable, can select the wire cable with smaller section under the condition of transmitting the same current, and achieves the purpose of reducing the outer diameter and the weight. The insulating layer and the shielding layer respectively adopt a double-layer structure, the reliability of electrical performance and mechanical performance is improved, the thickness of the insulating layer and the sheath is thin and uniform, the outer diameter of the cable is small, a wrapping structure is adopted, and the concentricity of the insulating layer and the sheath reaches more than 97%. Has excellent radiation resistance and can meet the use requirements of spacecrafts such as satellites.

Drawings

FIG. 1 is a schematic cross-sectional view of the present invention.

In the figure: 1. an inner conductor; 2. an inner insulating layer; 3. filling the support; 4. a filling layer; 5. wrapping a covering; 6. an outer insulating layer; 7. a shielding layer; 8. a metal braid layer; 9. a sheath layer.

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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b): referring to fig. 1, the PTFE insulated cable for aerospace dedicated for military industry comprises a cable core, and a shielding layer 7 and a sheath layer 9 outside the cable core, wherein the cable core comprises a plurality of conductor assemblies, filling support members 3 for supporting the conductor assemblies, and filling layers 4 filled between the conductor assemblies and the filling support members 3; the conductor assembly comprises an inner conductor 1 and an inner insulating layer 2, a filling layer 4 wrapping the inner insulating layer 2 is arranged outside the inner insulating layer 2, and a wrapping layer 5, an outer insulating layer 6, a shielding layer 7, a metal braid layer 8 and a sheath layer 9 are sequentially arranged outside the filling layer 4; the inner insulating layer 2 is made of PTFE material; the sheath layer 9 is made of irradiation cross-linked ethylene-tetrafluoroethylene copolymer material.

The outermost protective layer is made of irradiation cross-linked ethylene-tetrafluoroethylene copolymer material, is high temperature resistant and suitable for adapting to environmental changes in aerospace, the soft copper tape wraps the shielding layer 7 and the fluoropolymer insulating layer together to achieve the purposes of insulation and fire prevention, and the filling layer 4 made of PTFE material is corrosion resistant, light in weight and capable of reducing the weight of the whole cable. The cable for aerospace has the advantages of high and low temperature resistance, strong resistance to chemical substances and light weight.

Preferably, the inner conductor 1 is a tin-plated copper wire, and the inner insulating layer 2 is a polyimide composite film with PTFE coated on both surfaces of the inner conductor 1.

Preferably, the lapping layer 5 is a PTFE lapping tape wound outside the filling layer 4; the outer insulating layer 6 is a thin-wall PEEK insulating material extruded outside the wrapping layer 5. The overlapping rate of the PTFE wrapping tape of the wrapping layer 5 is more than 25 percent.

Preferably, the number of the conductor assemblies is four, the filling support 3 is a cross-shaped structure, and the four conductor assemblies are respectively located in four cavities of the filling support 3.

Preferably, the inner conductor 1 is a tinned copper wire, the filling layer 4 is a nylon filling strip with a compression-resistant effect, and the filling support member 3 is an integrally formed cross-shaped rubber gasket.

Fill support piece 3 through setting up and support conductor assembly, separate and support three crosslinked polyethylene insulating layer, protect inner conductor 1 and inner insulation layer 2 can not receive extrusion deformation or damage, improve the service strength of cable body to make the cable body have good insulating effect.

The filling layer 4 fills the gap between the conductor assembly and the filling support member 3 and wraps the conductor assembly, so that damage caused by loose friction between the conductor assembly and the filling support member 3 is avoided.

Preferably, the shielding layer 7 is an annealed silver-plated copper wire braid; the metal woven layer 8 is a carbon fiber metal-plated copper foil wire woven sleeve.

The weaving density of the copper wires of the shielding layer 7 is more than 90%.

The shielding layer 7 and the metal braid layer 8 are both of a metal braided shielding structure, and the two layers are combined, so that the cable has excellent shielding efficiency, and the shielding efficiency can be kept to be not less than 90dB in a frequency range of 1GHz and 50kV/m of high-altitude nuclear explosion electromagnetic pulse field intensity.

The utility model has small volume, light weight, radiation resistance and higher temperature resistance, correspondingly improves the current-carrying capacity of the cable, can select the wire cable with smaller section under the condition of transmitting the same current, and achieves the purpose of reducing the outer diameter and the weight. The insulating layer and the shielding layer 7 respectively adopt a double-layer structure, the reliability of electrical performance and mechanical performance is improved, the thickness of the insulating layer and the thickness of the sheath are thin and uniform, the outer diameter of the cable is small, a wrapping structure is adopted, and the concentricity of the insulating layer and the sheath reaches more than 97%. Has excellent radiation resistance and can meet the use requirements of spacecrafts such as satellites.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a special space flight of military project is PTFE insulated cable for aviation, includes cable core and outside shielding layer and restrictive coating thereof, its characterized in that: the cable core comprises a plurality of conductor assemblies, filling supporting pieces for supporting the conductor assemblies and filling layers filled between the conductor assemblies and the filling supporting pieces; the conductor assembly comprises an inner conductor and an inner insulating layer, the outer part of the inner insulating layer is a filling layer wrapping the inner insulating layer, and a wrapping layer, an outer insulating layer, a shielding layer, a metal braiding layer and a sheath layer are sequentially arranged outside the filling layer; the inner insulating layer is made of PTFE material; the sheath layer is made of irradiation crosslinking ethylene-tetrafluoroethylene copolymer material.

2. The PTFE insulated cable for military dedicated aerospace and aviation according to claim 1, wherein: the inner conductor is a tin-plated copper wire, and the inner insulating layer is a polyimide composite film with PTFE coated on two sides of the inner conductor.

3. The PTFE insulated cable for military dedicated aerospace and aviation according to claim 1, wherein: the wrapping layer is a PTFE wrapping tape wound outside the filling layer; the outer insulating layer is a thin-wall PEEK insulating material extruded outside the wrapping layer.

4. The PTFE insulated cable for military dedicated aerospace and aviation according to claim 1, wherein: the number of the conductor assemblies is four, the filling support piece is of a cross structure, and the four conductor assemblies are respectively positioned in four cavities of the filling support piece.

5. The PTFE insulated cable for military dedicated aerospace and aviation according to claim 1, wherein: the inner conductor is a tinned copper wire, the filling layer is a nylon filling strip with a compression-resistant effect, and the filling support piece is an integrally formed cross-shaped rubber gasket.

6. The PTFE insulated cable for military dedicated aerospace and aviation according to claim 1, wherein: the shielding layer is a copper wire braided layer plated with silver by annealing; the metal woven layer is a carbon fiber metal-plated copper foil wire woven sleeve.