CN218886846U

CN218886846U - Wear-resisting high flexible aviation large-section electric wire

Info

Publication number: CN218886846U
Application number: CN202222196864.8U
Authority: CN
Inventors: 陈小龙; 李宝福; 李亚; 乔小朵
Original assignee: Nanjing Quanxin Cable Technology Co Ltd
Current assignee: Nanjing Quanxin Cable Technology Co Ltd
Priority date: 2022-08-19
Filing date: 2022-08-19
Publication date: 2023-04-18
Anticipated expiration: 2032-08-19

Abstract

The utility model discloses a wear-resistant high-flexibility aviation large-section wire, which comprises a conductor layer, a wrapping insulating layer, an inner insulating layer, an outer insulating layer and a braided reinforcing layer from inside to outside; the conductor layer includes inner core and outer core, outer core cladding is in the inner core outside, the inner core includes a plurality of stranded conductor units, outer core includes that one deck or multilayer weave the conductor layer unit. The wear-resistant high-flexibility aviation large-section wire integrates the advantages and the disadvantages of the existing four types of aviation large-section wires, and effectively solves the problems of large outer diameter, heavy weight, and poor mechanical property and bending property of the existing wire.

Description

Wear-resisting high-flexibility aviation large-section wire

Technical Field

The utility model mainly relates to the technical field of cable manufacture, especially relate to a big cross-section electric wire of high flexible aviation of wear-resisting type.

Background

With the deep development of aerospace technology, the requirement of the aviation cable on the comprehensive performance of the material is higher and higher. In order to meet the harsh environmental requirements, structural modification, diversified combination and diversification and refinement of material processing technology are inevitable approaches and directions.

Currently, the mainstream aviation large-section electric wires include the following four types:

1) The silicone rubber insulated wire. This type of cable compliance is splendid, but mechanical strength is little, and is fragile, and is wear-resisting, and the external diameter is big, and weight is big, is unfavorable for the installation in the limited space and lays.

2) Tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA) insulated wire. The insulating material of the product has high density, the weight of the manufactured electric wire is higher, the hardness of the product is high, the flexibility is poor, and the development requirements of the aviation products in the current stage towards high flexibility and light weight can not be met.

3) Polyimide/polytetrafluoroethylene composite insulated wire. The product is formed by wrapping and sintering a film, but has poor bending performance, serious wrinkling phenomenon during bending, risks after long-term use and is not suitable for occasions with special requirements on bending radius.

4) A crosslinked ethylene-tetrafluoroethylene copolymer (XETFE) insulated wire. Typical products of the products are represented by 55A wires of the Rakan company, and have excellent electrical performance, mechanical performance and environmental performance, but the manufactured wires have high rigidity, poor flexibility, are not easy to bend, and are limited when being installed and laid in a limited space of a cabin.

Meanwhile, the conductor structure of the four products is a single compound twisting structure, the conductor is not round and easy to deform due to compaction, and the end of the conductor is easy to loosen during assembly, so that crimping or welding is not facilitated.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to prior art's not enough, research and invent a big cross-section electric wire of high flexibility aviation of wear-resisting type, synthesized the excellent shortcoming of the big cross-section electric wire of above-mentioned four types of aviation, effectively solved the big, heavy, the poor problem of mechanical properties of weight and bending property of current electric wire external diameter.

In order to achieve the purpose, the invention is realized by the following technical scheme:

a wear-resistant high-flexibility aviation large-section wire comprises a conductor layer, a wrapping insulating layer, an inner insulating layer, an outer insulating layer and a braided reinforcing layer from inside to outside; the conductor layer includes inner core and outer core, outer core cladding is in the inner core outside, the inner core includes a plurality of stranded conductor units, outer core includes that one deck or multilayer weave the conductor layer unit.

Furthermore, the stranded conductor unit is formed by multiple stranding of a plurality of tin-plated, silver-plated or nickel-plated copper monofilaments, and a plurality of stranded conductor units are combined together and positioned in the center of the conductor layer.

Furthermore, the braided conductor layer unit is braided by a plurality of tin-plated, silver-plated or nickel-plated copper monofilaments, and the braiding density is greater than or equal to 95%.

Furthermore, the wrapping insulating layer is 0.03-0.05mm thick, wraps the outer side of the conductor layer, and has a wrapping covering rate of 50.5% -54%.

Furthermore, the inner insulating layer and the outer insulating layer are formed by extruding and irradiating modified soft fluorine materials.

Furthermore, the weaving enhancement layer is a meta-aramid weaving layer, the weaving density is greater than or equal to 95%, and the meta-aramid weaving layer is coated with wear-resistant polymer emulsion.

Furthermore, the diameter of the copper monofilament adopted by the stranded conductor unit and the braided conductor layer unit is 0.08-0.30 mm.

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

the utility model provides a pair of big cross-section electric wire of wear-resisting high flexibility aviation satisfies the demand of aviation product to high performance, soft, lightweight direction development, is applicable to the electric energy transmission of aviation airborne equipment, and specially adapted has special requirement's occasion to bend radius.

The wear-resistant high-flexibility aviation large-section wire has the advantages that:

1) Small outer diameter and light weight. The adopted modified soft fluorine material has small density, extremely excellent mechanical property and electrical property, thin insulation thickness design, small wire outer diameter and weight which is 20 to 30 percent lighter than other leads.

2) Excellent wear resistance. The inner and outer insulating layers prepared from the modified soft fluorine material and the woven reinforcing layer have good wear-resisting characteristics, the woven reinforcing layer further plays a role in protecting the wire core, the insulating layer is prevented from being worn and damaged in laying or using processes, and the service life of the product is further prolonged.

3) Excellent flexibility. Different from the traditional single compound twisted structure of the conductor, the conductor of the product of the utility model adopts a new structure of twisting and weaving, thus improving the roundness of the conductor and simultaneously keeping the flexibility of the conductor; on the other hand, the softness of the modified soft fluorine material adopted for insulation is superior to that of the like products, and a certain gain effect is achieved on the softness of the electric wire. The minimum bending radius of the product is 6 times of the outer diameter of the wire due to the soft design, and the surface of the wire is not wrinkled during bending, so that the wire can be laid in a narrow space, and construction can be carried out without large force and special mounting tools.

4) Preventing mould, salt fog and damp heat. The mildew-proof grade is 1 grade, and the product still maintains excellent electrical property and mechanical property under the conditions of long-time salt mist and damp and hot environment.

5) Resistant to various chemical attacks. The aircraft oil is not corroded by aircraft liquid, and comprises an aqueous solution, acid-base liquid, fuel oil, lubricating oil, a cleaning agent, a coolant, an antifreezing agent and the like, and is not influenced at high temperature.

6) The flame retardant property is excellent. The wire can be self-extinguished within 3s when burning, and the released harmful substancesThe gas release amount is extremely low, CO is less than or equal to 3500ppm _x ≤100ppm，SO ₂ Less than or equal to 100ppm, less than or equal to 150ppm HCl, less than or equal to 150ppm HCN, less than or equal to 100ppm HF, which does not cause harm to the health of people.

Drawings

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

fig. 2 is a cross-sectional view of the conductor of the present invention.

Wherein:

1-a conductor layer; 2, wrapping an insulating layer; 3-an inner insulating layer; 4-an outer insulating layer; 5-weaving a reinforcing layer;

11-a stranded conductor unit; 12-weaving the conductor layer unit.

Detailed Description

The following further explains the embodiments of the present invention with reference to the drawings.

As shown in fig. 1, the abrasion-resistant high-flexibility aviation large-section wire comprises a conductor layer 1, a wrapped insulating layer 2, an inner insulating layer 3, an outer insulating layer 4 and a braided reinforcing layer 5 from inside to outside.

As shown in fig. 2, the conductor layer 1 includes an inner core and an outer core, the outer core is wrapped outside the inner core, the inner core includes a plurality of twisted conductor units 11, and the outer core includes one or more layers of braided conductor layer units 12.

The stranded conductor unit 11 is formed by multiple times of twisting a plurality of superfine tin-plated, silver-plated or nickel-plated copper monofilaments, the stranded conductor units 11 are combined together and positioned at the center of the conductor layer 1 to form a core framework of the conductor layer 1, and the roundness of the framework determines the roundness of the whole conductor layer 1.

The braided conductor layer unit 12 is braided by a plurality of extremely fine tin-plated, silver-plated or nickel-plated copper monofilaments, the braiding density of the braided conductor layer unit 12 is greater than or equal to 95%, and the braided conductor layer unit is tightly covered outside the framework.

The diameter of the copper monofilament adopted by the stranded conductor unit 11 and the braided conductor layer unit 12 is preferably 0.08mm to 0.30mm. The composite structure design of the conductor ensures the flexibility of the conductor, improves the roundness of the conductor, solves the problem that the end of the conductor is easy to loosen in the assembling process, and is more beneficial to laying and installation.

The lapped insulating layer 2 is formed by lapping a polytetrafluoroethylene turning belt or a polyimide composite belt, and the purpose is to improve the strippability of a product and avoid the adhesion of a conductor and insulation due to high-temperature extrusion molding. The thickness of the lapping insulating layer 2 is preferably 0.03-0.05mm, the lapping insulating layer is coated on the outer side of the conductor layer 1, and the lapping covering rate is 50.5% -54%.

The inner insulating layer 3 and the outer insulating layer 4 are both formed by extruding and irradiating a modified soft fluorine material, the modified soft fluorine material is formed by adding fluororubber, a cross-linking agent, an antioxidant and the like on the basis of ETFE resin through polymerization and granulation processes. The softness of the modified soft fluorine material is superior to that of the like products, and a certain gain effect is achieved on the softness of the electric wire.

The weaving reinforced layer 5 is a meta-aramid braid layer, the weaving density is more than or equal to 95%, wear-resistant polymer emulsion is coated after weaving, high-temperature sintering is carried out, the sintering speed is 5 m/min-8 m/min, the meta-aramid and the wear-resistant emulsion are adhered into a whole, an aramid reinforced electric wire is formed, and the wear resistance of the product is improved.

The main indexes of the wear-resistant high-flexibility aviation large-section wire of the embodiment are compared with those of four types of mainstream aviation large-section wires in table 1.

TABLE 1 index comparison

Finally, it should be noted that: although the present invention has been described in detail with reference to the embodiments, it will be apparent to those skilled in the art that modifications, equivalents, improvements and the like can be made in the technical solutions of the foregoing embodiments or in some technical features of the foregoing embodiments, but all modifications, equivalents, improvements and the like within the spirit and principle of the present invention are intended to be included in the scope of the present invention.

Claims

1. A wear-resistant high-flexibility aviation large-section wire is characterized by comprising a conductor layer (1), a wrapping insulating layer (2), an inner insulating layer (3), an outer insulating layer (4) and a braided reinforcing layer (5) from inside to outside; the conductor layer (1) includes inner core and outer core, outer core cladding is in the inner core outside, the inner core includes a plurality of stranded conductor unit (11), outer core includes that one deck or multilayer weave conductor layer unit (12).

2. A wear-resistant highly flexible aircraft large-section wire as claimed in claim 1, wherein said stranded conductor unit (11) is formed by multiple stranding of several tinned, silvered or nickelled copper monofilaments, and a plurality of stranded conductor units (11) are grouped together in the center of the conductor layer (1).

3. A wear-resistant highly flexible aircraft large-section wire according to claim 2, characterized in that the braided conductor layer unit (12) is braided from several tin-, silver-or nickel-plated copper monofilaments with a braiding density of 95% or more.

4. A wear-resistant high-flexibility aviation large-section wire as claimed in claim 1, wherein the wrapping insulating layer (2) has a thickness of 0.03-0.05mm, is coated on the outer side of the conductor layer (1), and has a wrapping coverage rate of 50.5% -54%.

5. A wear-resistant high-flexibility aviation large-section wire according to claim 1, wherein the inner insulating layer (3) and the outer insulating layer (4) are formed by extruding and irradiating modified soft fluorine materials.

6. A wear-resistant high-flexibility aviation large-section electric wire as claimed in claim 1, wherein said braided reinforcement layer (5) is a woven meta-aramid layer, the braiding density is 95% or more, and said woven meta-aramid layer is coated with a wear-resistant polymer emulsion.

7. A wear-resistant highly flexible aviation large-section wire as claimed in claim 3, wherein the diameter of copper monofilament used for said stranded conductor unit (11) and said braided conductor layer unit (12) is 0.08 mm-0.30 mm.