CN213716539U

CN213716539U - High-temperature-resistant connecting cable around automobile engine

Info

Publication number: CN213716539U
Application number: CN202022633943.1U
Authority: CN
Inventors: 王朔; 钱子明; 甘斯宁; 管雨娟
Original assignee: Jiangsu Hengtong Electronic Cable Technology Co Ltd
Current assignee: Jiangsu Hengtong Electronic Cable Technology Co Ltd
Priority date: 2020-11-13
Filing date: 2020-11-13
Publication date: 2021-07-16
Anticipated expiration: 2030-11-13

Abstract

A high-temperature resistant connecting cable around an automobile engine comprises a central conductor (1), a silicon rubber insulating layer (2) wrapped outside the central conductor (1), and a wear-resistant protective layer (3) wrapped outside the silicon rubber insulating layer (2); the method is characterized in that: a semi-conductive tape wrapping layer (4) is arranged between the silicon rubber insulating layer (2) and the central conductor (1) at an interval, and the semi-conductive tape wrapping layer (4) is formed by seamless wrapping of semi-conductive tapes; and a PTFE clinker belt winding layer (5) is arranged between the outside of the silicon rubber insulating layer (2) and the wear-resistant protective layer (3) at intervals, and the PTFE clinker belt winding layer (5) is formed by seamless winding of a PTFE clinker belt.

Description

High-temperature-resistant connecting cable around automobile engine

Technical Field

The utility model relates to a cable field, concretely relates to high temperature resistant connecting cable around automobile engine.

Background

In recent years, the rapid development of the automobile industry, and the requirements of people on driving safety are increasing day by day, thereby having great influence on the circuit development of an automobile system. At present, the environment of the cable around the automobile engine is severe, and the cable is required to have the performances of high temperature resistance, oil resistance, chemical corrosion resistance, flame retardance, fire resistance and the like. Therefore, in order to address the above severe environments, it is necessary to design a special cable with excellent performance.

Disclosure of Invention

The utility model aims at providing a high temperature resistant connecting cable around automobile engine.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a high-temperature resistant connecting cable around an automobile engine comprises a central conductor, a silicon rubber insulating layer and a wear-resistant protective layer, wherein the silicon rubber insulating layer is wrapped outside the central conductor; a semi-conductive tape wrapping layer is arranged between the silicon rubber insulating layer and the central conductor at intervals, and the semi-conductive tape wrapping layer is formed by seamless wrapping of semi-conductive tapes; and a PTFE clinker belt winding layer is arranged between the silicon rubber insulating layer and the wear-resistant protective layer at intervals, and the PTFE clinker belt winding layer is formed by seamless winding of a PTFE clinker belt.

In the above scheme, the central conductor is a tin-plated copper stranded conductor.

Further, the central conductor is formed by stranding 45-60 monofilaments in a bundle at a pitch.

In the above scheme, the wear-resistant protective layer is composed of an inner layer and an outer layer, wherein the inner layer is a silicon dioxide fiber and glass fiber braided layer, and the outer layer is a silica gel coating layer.

In the above-mentioned embodiment, the semiconductive belt is composed of an inner layer and an outer layer, the inner layer is a conductive layer, and the outer layer is an insulating layer.

Further, the thickness of the semiconducting tape is 0.10-0.2 mm.

In the scheme, the thickness of the PTFE cured material belt is 0.02mm-0.04 mm.

The utility model discloses a design characteristics lie in: the design of considering high temperature cable is mainly to strengthen the protection to the insulating layer, guarantees the compressive property of insulating layer, the utility model discloses an internally designed semi-conductive area at the silicon rubber insulating layer is around the covering protection to designed PTFE grog area at the outside of silicon rubber insulating layer and around the covering protection, this kind is to the inside and outside dual isolation protection of insulating layer the characteristics of the utility model. The semi-conductive tape is wrapped the effect of covering and is: the cable is positioned outside the central conductor, and the gaps of the central conductor, which are generated by a monofilament twisted structure, are filled, so that an electric field can be well homogenized, high voltage generated when an engine compartment is ignited is prevented from causing point discharge, the cable can better withstand the ignition voltage, and the thermal aging characteristic that copper ions in the central conductor are oxidized to damage a silicon rubber insulating layer is also prevented; the PTFE clinker belt is wound around the cladding layer and mainly has the function of isolating pollutants such as outside water, oil and the like from invading the silicon rubber insulating layer. This kind of respectively establish the call-up design of isolation layer inside and outside insulating the guide, make the cable insulation layer under thinner condition, tolerate higher voltage, the cable just can be more frivolous, satisfies modern car theory, can satisfy the lightweight cable design, can guarantee again that the cable can tolerate higher voltage in the engine compartment, better work.

Drawings

Fig. 1 is a schematic cross-sectional view of an embodiment of the present invention.

In the above drawings: 1. a center conductor; 2. a silicon rubber insulating layer; 3. a wear-resistant protective layer; 4. a semi-conductive tape wrapping layer; 5. the PTFE clinker tape was wrapped around the cladding.

Detailed Description

The invention will be further described with reference to the following drawings and examples:

example (b): referring now to FIG. 1:

a high-temperature-resistant connecting cable around an automobile engine comprises a central conductor 1, a silicon rubber insulating layer 2 wrapped outside the central conductor 1 and a wear-resistant protective layer 3 wrapped outside the silicon rubber insulating layer 2.

Referring to the attached drawing 1, a semi-conductive tape wrapping layer 4 is arranged between the silicon rubber insulating layer 2 and the central conductor 1 at intervals, and the semi-conductive tape wrapping layer 4 is formed by semi-conductive tape seamless wrapping; and a PTFE clinker belt winding layer 5 is arranged between the outside of the silicon rubber insulating layer 2 and the wear-resistant protective layer 3 at intervals, and the PTFE clinker belt winding layer 5 is formed by seamless winding of PTFE clinker belts.

Specifically, the central conductor 1 is a tinned copper stranded conductor, specifically is formed by stranding 45-60 monofilament bundles according to pitch, most preferably 50 monofilament bundles with the diameter of 0.25mm according to pitch, and finally the outer diameter of the conductor is 1.95 +/-0.05 mm, so that the heat-resistant temperature is 150-180 ℃.

Referring to fig. 1, the wear-resistant protective layer 3 is composed of an inner layer and an outer layer, wherein the inner layer is a silica fiber and glass fiber braided layer, and the outer layer is a silica gel coating layer. The outer diameter of bundled fibers in the silicon dioxide fiber and glass fiber braided layer is 0.25mm, and the braiding density is 85%. The wear-resistant protective layer 3 has the functions of: the silicon dioxide fiber and the glass fiber braided layer improve the wear-resisting characteristic of the cable, and the silica gel coating prevents the glass fiber and the silicon dioxide fiber from rubbing to generate burrs, and simultaneously achieves certain oil-resistant, waterproof and fire-resistant characteristics.

The semi-conductive belt is composed of an inner layer and an outer layer, wherein the inner layer is a conductive layer, the outer layer is an insulating layer, and the thickness of the semi-conductive belt is 0.10-0.2mm, preferably 0.15 +/-0.01 mm.

The thickness of the PTFE cured material belt is 0.02mm-0.04mm, and the best thickness is 0.03 mm.

The silicon rubber insulating layer 2 is made of a high-temperature-resistant silicon rubber insulating material, and the raw materials of the silicon rubber insulating layer comprise the following components in parts by weight:

80-95% of methyl phenyl vinyl silicone rubber

30-40 parts of methyl vinyl silicone rubber,

30-50 parts of white carbon black,

5 to 10 parts of polymetal organic siloxane,

0.5 to 5 parts of high vinyl phenyl silicone oil,

0.1 to 2 parts of a heat-resistant agent,

0.001 to 0.5% of a platinum complex,

0.5-1.5 parts of double-component platinum vulcanizing agent

The processing steps of the raw materials of the silicon rubber insulating layer 2 comprise:

firstly, preparing the raw materials of the formula into high-temperature-resistant silicon rubber, adding the high-temperature-resistant silicon rubber into a mixing roll, and rolling for at least 10 times by using the roll. The silicon rubber is refined into a cake shape.

Secondly, adding the color paste into the silicon rubber after refining the silicon rubber into a cake shape, and refining the silicon rubber for at least 15 times by using the two-component vulcanizing agent until the color paste is mixed uniformly and the surface has no air holes.

Thirdly, extruding the uniformly and completely mixed silicon rubber by an insulating extruder, wherein the vulcanization temperature is as follows: a first area: 350 ℃, zone two: 320 ℃, three zones: 300 ℃, four zones: 260 ℃, five zones: 200 ℃, six zones: 190 ℃. The extrusion speed was controlled at 20 m/min.

Finally, the thickness of the silicone rubber insulating layer 2 is preferably 1.25 ± 0.05 mm.

The final outer diameter of the cable of the embodiment is controlled to be about 5.00 +/-0.05 mm.

The embodiment is a safer engine cable, meets the safety requirement of electric transmission under the severe environment around the engine, and is specially used for meeting the requirement of a whole vehicle manufacturer on a wiring harness around the engine with strict performance requirement, the high-temperature resistant connecting cable around the automobile engine can resist the temperature of-55-180 ℃, chemical reagents are good, and the fire-resistant and fireproof characteristics meet the requirements of IEC 60332.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. A high-temperature resistant connecting cable around an automobile engine comprises a central conductor (1), a silicon rubber insulating layer (2) wrapped outside the central conductor (1), and a wear-resistant protective layer (3) wrapped outside the silicon rubber insulating layer (2); the method is characterized in that: a semi-conductive tape wrapping layer (4) is arranged between the silicon rubber insulating layer (2) and the central conductor (1) at an interval, and the semi-conductive tape wrapping layer (4) is formed by seamless wrapping of semi-conductive tapes; and a PTFE clinker belt winding layer (5) is arranged between the outside of the silicon rubber insulating layer (2) and the wear-resistant protective layer (3) at intervals, and the PTFE clinker belt winding layer (5) is formed by seamless winding of a PTFE clinker belt.

2. The high temperature resistant connecting cable around an automobile engine according to claim 1, characterized in that: the central conductor (1) is a tin-plated copper stranded conductor.

3. The high temperature resistant connecting cable around an automobile engine according to claim 2, characterized in that: the central conductor (1) is formed by stranding 45-60 monofilaments in bundles according to a pitch.

4. The high temperature resistant connecting cable around an automobile engine according to claim 1, characterized in that: the wear-resistant protective layer (3) is composed of an inner layer and an outer layer, the inner layer is a silicon dioxide fiber and glass fiber braided layer, and the outer layer is a silica gel coating layer.

5. The high temperature resistant connecting cable around an automobile engine according to claim 1, characterized in that: the semi-conducting belt is composed of an inner layer and an outer layer, wherein the inner layer is a conducting layer, and the outer layer is an insulating layer.

6. The high temperature resistant connecting cable around automobile engine according to claim 5, characterized in that: the thickness of the semi-conducting belt is 0.10-0.2 mm.

7. The high temperature resistant connecting cable around an automobile engine according to claim 1, characterized in that: the thickness of the PTFE cured material belt is 0.02mm-0.04 mm.