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High-temperature resistant dual-layer insulating seamless lapped wire

A double-layer insulation and high-temperature-resistant technology, applied in the direction of insulated cables, insulated conductors, organic insulators, etc., can solve problems such as loose bonding, poor vacuum air permeability of silicone rubber, and reduced performance of wires, so as to ensure the temperature resistance level and improve The effect of job stability

Inactive Publication Date: 2010-07-07
SHANGHAI SPECIAL CABLE ELECTROTECHN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above three types of wires have different ranges of applications in the aviation field, but all have certain limitations:
[0005] 1. Silicone rubber thin-wall insulation is difficult to extrude, it is difficult to control the weight of the wire, and the vacuum permeability of silicone rubber is poor, the mechanical strength is poor, and it is not suitable for resisting atomic oxygen barriers; polyethersulfone insulated wires have poor UV resistance; PEEK insulation The high price of insulation materials for wires limits its widespread use in aviation
[0006] 2. Irradiation cross-linked ethylene-tetrafluoroethylene extruded insulated wire has relatively high requirements for raw materials, the price of raw materials is expensive, and the investment in irradiation equipment is relatively large
[0007] 3. Although it is easy to control the weight of the wire wrapped by PTFE film, the PTFE film is directly wrapped on the surface of the conductor, and the bond between the conductor and the conductor is not tight, so it is difficult to control the defects generated during the wrapping process , it is easy to generate gaps at the covering place, resulting in a decrease in the performance of the wire, and the corona resistance is relatively poor

Method used

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  • High-temperature resistant dual-layer insulating seamless lapped wire
  • High-temperature resistant dual-layer insulating seamless lapped wire
  • High-temperature resistant dual-layer insulating seamless lapped wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Regular stranded copper conductor polyimide film is wrapped with high temperature sintering PTFE film is wrapped with high temperature sintering.

Embodiment 2

[0033] Non-regular stranded copper conductor polyimide film is wrapped with high temperature sintering and polytetrafluoroethylene film is wrapped with high temperature sintering.

[0034] Check the appearance of Embodiment 1 and Embodiment 2 through hand touch and visual observation, and no obvious gaps are found; by adjusting the wrapping angle, the theoretical wrapping rate of Embodiment 1 and Embodiment 2 is about 50%. ; Winding test results: when the winding diameter is 1D, neither the first nor the second embodiment has warping or cracking.

[0035] Compared with traditional aviation insulated wires, the wires of the present invention have the characteristics of high temperature resistance and light weight:

[0036]

[0037] Note: The above wire specifications are AWG 22#

Embodiment 3

[0039] According to the change of the diameter of the conductor, the parameters such as the thickness of the polyimide film of the inner insulating layer and the polytetrafluoroethylene film of the outer insulating layer, the wrapping angle, and the width can be changed to control the overlapping rate. As shown in the following table:

[0040]

[0041]

[0042] Compared with other aviation insulated wires, the wire of the invention has the advantage of low cost. Taking AWG22# wire gauge as an example, its manufacturing cost of the electric wire of the present invention is about 80% of polytetrafluoroethylene insulated wire, 30% of PEEK insulated wire, and 30% of radiation cross-linked ethylene-tetrafluoroethylene insulated wire. Strong market competitive advantage.

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Abstract

The invention relates to the field of a wire and a cable, in particular to a high-temperature resistant thin insulating wire used for power and signal transmission in the field of aviation. The cross section of a high-temperature resistant dual-layer insulating seamless lapped wire respectively comprises a twisted copper conductor, an inner insulating layer of a lapped polyimide film and an outer insulating layer of a lapped Teflon film from inside to outside. Compared with the traditional insulating wire for aviation, the wire in the invention has the characteristics of high-temperature resistance, light weight and low cost.

Description

Technical field: [0001] The invention relates to the field of electric wires and cables, in particular to high-temperature-resistant thin insulated wires used in the aviation field to transmit electric power and signals. Background technique: [0002] With the continuous advancement of the global integration process, the aviation industry of various countries has developed rapidly, and the development of domestic large aircraft has put forward new requirements for domestic aviation insulated wires. Aviation insulated wires must not only have the characteristics of high temperature resistance and high voltage resistance, but also require light weight, moisture and hydrolysis resistance, and be able to adapt to the requirements of long-term operation in complex working environments. [0003] At present, the production process of insulated wires used in the aviation field mainly includes the following technical methods: ① extruded insulated wires with high temperature resistant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B7/00H01B7/02H01B7/29H01B3/30H01B3/44H01B13/08
Inventor 徐伟张德顺
Owner SHANGHAI SPECIAL CABLE ELECTROTECHN
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