High-temperature-resistant friction-resistant enameled flat wire

Abstract

The utility model provides a high-temperature-resistant abrasion-resistant enameled flat wire, which comprises a flat conductor, an insulating heat-resistant layer is coated outside the flat conductor, and lubricating paint is coated on the insulating heat-resistant layer; the thickness of the side wall formed by overlapping the insulating heat-resistant layer and the lubricating paint is 75-90 microns, so that the enameled flat wire can be designed in a high-temperature and high-friction-resistance environment, and is particularly suitable for manufacturing windings in motors, transformers and high-performance electronic equipment. The core of the wire is that the heat resistance of polyimide is retained, and the characteristic of ultralow friction coefficient of tetrafluoroethylene is integrated, so that the frictional resistance of the wire in the winding, mounting and running processes is remarkably reduced, the service life of equipment is prolonged, the energy consumption is reduced, and the requirement of light weight is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of enameled flat wire, and in particular to a high-temperature-resistant grinding enameled flat wire. BACKGROUND

[0002] With the electronic products more and more small, miniaturization, integration, complexification and high efficiency automation, enameled wire as the main raw material of electronic products is widely used in small, miniature electronic transformer, filter, patch inductor, etc. In the production process of electronic products, each component is required to have high heat resistance to meet the requirements of high efficiency automation, such as patch inductor, which better meets the requirements of the product when passing through 265 DEG C reflow soldering furnace.

[0003] The electronic products produced by using ordinary enameled wire with low temperature resistance level show high failure rate under relatively harsh processing and use conditions. At present, the existing polyimide enameled wire has good high-temperature resistance, but when moving at high speed, it is not flexible enough and not resistant to bending under the action of bending moment, and the problem of enameled wire tearing often occurs, and long-term use may even cause motor short circuit.

[0004] As the existing patent CN201921541931.7 discloses an enameled copper flat wire, which comprises a copper core, recesses are formed at the top and bottom ends of the two sides of the copper core, the recesses are L-shaped, a first insulating layer is arranged outside the copper core, anti-bending mechanisms are arranged on the two sides of the first insulating layer, a magnetic particle coating is arranged between the two anti-bending mechanisms, a second insulating layer is arranged outside the magnetic particle coating, a corrosion-resistant layer is arranged outside the second insulating layer, and an outer protective layer is arranged outside the corrosion-resistant layer. By arranging the anti-bending mechanisms on the two sides of the first insulating layer, the anti-bending mechanisms comprise a clamping frame and a glass fiber layer, the bending strength of the enameled copper flat wire in the horizontal and vertical directions is improved, the problem of enameled wire tearing during high-strength use is avoided, the first insulating layer and the second insulating layer are arranged, the corrosion-resistant layer and the outer protective layer are arranged, but when the above technical solution is adopted, the copper flat wire will accumulate heat and be worn due to the over-thickness of the outer paint layer, and the service life of the copper flat wire is reduced. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies in the prior art, the utility model aims to provide a high-temperature-resistant grinding enameled flat wire.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a high-temperature-resistant grinding enameled flat wire, comprising: a flat conductor, the flat conductor is coated with an insulating heat-resistant layer, and the insulating heat-resistant layer is coated with a lubricating paint; the thickness of the edge wall of the insulating heat-resistant layer and the lubricating paint is 75-90 microns.

[0007] Further, the material of the insulating heat-resistant layer is polyimide.

[0008] Further, the material of the lubricating paint is a mixture of polyimide and tetrafluoroethylene, and the mass ratio of the polyimide to the tetrafluoroethylene is 1:1-1.5.

[0009] Further, the insulating heat-resistant layer is an insulating paint layer formed by multiple times of coating on the surface of the flat conductor.

[0010] Further, the thickness ratio of the insulating heat-resistant layer to the lubricating paint is 1:0.05-0.6.

[0011] Further, the material of the flat conductor is copper.

[0012] Compared with the prior art, the utility model has the beneficial effects as follows:

[0013] The application is a flat wire coated with paint designed under high temperature and high frictional resistance environment, and is particularly suitable for winding manufacturing in motors, transformers and high-performance electronic devices. The core is to retain the heat resistance of polyimide and integrate the ultra-low friction coefficient characteristics of tetrafluoroethylene, which significantly reduces the frictional resistance of the conductor during winding, installation and operation, prolongs the service life of the equipment, reduces energy consumption, and meets the lightweight demand. BRIEF DESCRIPTION OF DRAWINGS

[0014] Other features, objects and advantages of the utility model will become more apparent through reading the following detailed description of the non-restrictive embodiments with reference to the accompanying drawings:

[0015] Figure 1 It is the main structure schematic view of the utility model;

[0016] In the figure: 1, flat conductor; 2, insulating heat-resistant layer; 3, lubricating paint. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, purposes and effects of the utility model easy to understand, the utility model is further described below in combination with specific embodiments.

[0018] The applicant found during research and development that pure PI ename wire still has the problem of high friction coefficient and insufficient wear resistance in frequent friction occasions, which limits its application in some extreme conditions. With the continuous increase of power density of electrical equipment, higher requirements are put forward for the heat resistance, insulation and mechanical properties of ename wire. The existing ename wire has self-lubricating, wear-resistant and other characteristics by adding special additives such as molybdenum disulfide, graphite, polytetrafluoroethylene, etc. Among them, molybdenum disulfide is easy to oxidize, which leads to the decrease of lubrication and corrosion resistance; graphite has electrical conductivity and is easy to cause electrochemical corrosion; therefore, the applicant found that polytetrafluoroethylene (PTFE) not only has excellent lubricating properties, but also has low surface energy, good hydrophobic properties, excellent chemical stability and corrosion resistance.

[0019] Thus a kind of high temperature resistant wear ename flat wire is developed, comprising: flat conductor 1, the flat conductor 1 is coated with insulating heat-resistant layer 2, the insulating heat-resistant layer 2 is coated with lubricating paint 3;The thickness of the edge wall of the insulating heat-resistant layer 2 and the lubricating paint 3 is 75-90 μm;To achieve light weight while effectively reducing the friction coefficient of the paint film and the surrounding environment, improve the wear resistance and service life of the ename wire;

[0020] So that the ename wire can work continuously and stably in high temperature environment (such as 240℃). This ename wire usually uses high-performance insulating materials, such as aromatic polyimide (PI), to ensure that it can still maintain excellent insulation performance and mechanical properties at high temperatures. The focus of this technical field is on the selection of materials, the coating process of the insulating layer, and the temperature resistance performance testing of the product, etc. It is mainly applied in the field of electrical materials technology, such as the drive motor of new energy vehicles, transformer, generator, etc. in high temperature environment.

[0021] Lubricating paint 3 (self-lubricating ename flat wire) refers to the addition of components with lubricating properties in the insulating layer of ename wire, so that the ename wire can reduce friction and wear during winding, installation and use. This lubricating property is usually achieved by modifying the insulating material or coating a lubricating layer on the surface of the insulating layer. Self-lubricating ename flat wire is particularly suitable for electrical equipment that needs to be moved or rotated frequently, such as the winding of motors, sliding contact components, etc. The use of self-lubricating ename flat wire can reduce heat accumulation and wear caused by friction, improve the running stability and service life of the equipment.

[0022] In order to ensure long-term high temperature resistance, the material of the insulating heat-resistant layer 2 is polyimide.

[0023] The material of the lubricating paint 3 is a mixture of polyimide and tetrafluoroethylene, and the mass ratio of polyimide to tetrafluoroethylene is 1:1-1.5, to ensure the stability of the performance of the paint.

[0024] The insulating heat-resistant layer 2 is an insulating paint layer formed by coating the surface of the flat conductor 1 multiple times.

[0025] The thickness ratio of the insulating heat-resistant layer 2 to the lubricating paint 3 is 1:0.05-0.6.

[0026] The application also performs performance testing and evaluation after baking and curing, specifically including the following:

[0027] Electrical performance testing: including resistivity, insulation resistance, dielectric strength, and other test items to evaluate whether the electrical performance of the enameled wire meets the requirements.

[0028] Thermal performance testing: thermal stability testing of the enameled wire in a high-temperature environment to evaluate its high-temperature resistance, with the requirement that the product meets the thermal level requirement of 240.

[0029] Mechanical performance testing: including tensile strength, bending performance, and especially wear resistance testing to evaluate the mechanical performance and service life of the enameled wire.

[0030] Since previous self-lubrication was compounded with 220, which easily led to problems such as a decrease in heat resistance, the present application is compounded with 240, which can increase the heat resistance of the electromagnetic flat wire while improving the wear resistance, with the number of reciprocating paint scraping increased by more than 2 times, making the product quality higher and more stable.

[0031] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the present application, and all such modifications or replacements should be included in the scope of the claims of the present application.

Claims

1. A high-temperature resistant, wear-resistant enameled flat wire, comprising: A flat conductor (1) is characterized in that the flat conductor (1) is covered with an insulating and heat-resistant layer (2), and the insulating and heat-resistant layer (2) is covered with a lubricating varnish (3); the thickness of the sidewall of the superimposed insulating and heat-resistant layer (2) and the lubricating varnish (3) is 75-90 μm.

2. The high-temperature wear-resistant enameled flat wire as described in claim 1, characterized in that, The insulating and heat-resistant layer (2) is made of polyimide.

3. The high-temperature wear-resistant enameled flat wire as described in claim 2, characterized in that, The insulating and heat-resistant layer (2) is an insulating varnish layer formed by repeatedly coating the surface of the flat conductor (1).

4. The high-temperature wear-resistant enameled flat wire as described in claim 3, characterized in that, The thickness ratio of the insulating heat-resistant layer (2) to the thickness of the lubricating paint (3) is 1:0.05-0.

6.

5. The high-temperature wear-resistant enameled flat wire as described in claim 1, characterized in that, The flat conductor (1) is made of copper.

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