Wear-resistant flat enameled copper wire

Abstract

The utility model discloses a wear-resistant flat enameled copper wire, which comprises a copper flat wire main body (1), polyimide insulating paint (2), an inner nylon layer (3), a polybismaleimide-arylamine resin layer (4), a polyamide-imide insulating paint layer (5) and an outer nylon layer (6) are sequentially arranged outside the copper flat wire main body (1), and a wear-resistant coating (7) is arranged on the surface of the outer nylon layer (6). The inner nylon layer (3) comprises a first nylon layer (301) and a second nylon layer (302), and a glass fiber layer (303) distributed in a grid shape is arranged on the surface of the first nylon layer (301). The utility model has the characteristic that the wear-resisting property can be effectively improved.

Description

Technical Field

[0001] The utility model relates to an enameled rectangular wire, in particular to a wear-resistant flat enameled copper wire. Background Art

[0002] Enameled rectangular wire refers to enameled wire with a rectangular or square cross-section of the conductor, which is widely used in various motors with high performance requirements. The existing enameled rectangular wire mostly adopts a structure of multiple layers of polyimide paint, which has a high temperature resistance grade and excellent chemical resistance, but its wear resistance is general. Moreover, since the two narrow edges of the enameled rectangular wire are in a round chamfer structure, the round chamfer is more prone to wear relative to the upper and lower surfaces, and the paint film is also more likely to be damaged and fall off. Therefore, the existing technology has the problem of poor wear resistance. Content of the Utility Model

[0003] The purpose of the utility model is to provide a wear-resistant flat enameled copper wire. The utility model has the characteristic of effectively improving the wear resistance.

[0004] The technical solution of the utility model: a wear-resistant flat enameled copper wire, which includes a copper rectangular wire main body, and is successively provided with a polyimide insulating paint, an inner nylon layer, a polybismaleimide-aryl amine resin layer, a polyamide-imide insulating paint layer and an outer nylon layer outside the copper rectangular wire main body, and a wear-resistant coating is provided on the surface of the outer nylon layer; the inner nylon layer includes a first nylon layer and a second nylon layer, and a glass fiber layer distributed in a grid shape is provided on the surface of the first nylon layer.

[0005] In the foregoing wear-resistant flat enameled copper wire, stepped grooves are provided at the two flat narrow edges of the outer nylon layer, concave holes are provided on the surface of the stepped grooves, and an outer glass fiber layer is also provided on the surface of the stepped grooves; the wear-resistant coating includes a bottom wear-resistant coating located in the stepped grooves, and an outer wear-resistant coating covering the outer nylon layer and the bottom wear-resistant coating is provided outside the bottom wear-resistant coating.

[0006] In the foregoing wear-resistant flat enameled copper wire, a metal oxide polyamide-imide paint layer is further provided between the polyimide insulating paint and the inner nylon layer.

[0007] Compared with the existing technology, by successively arranging a polyimide insulating paint layer, an inner nylon layer, a polybismaleimide-aryl amine resin layer, a polyamide-imide insulating paint layer, an outer nylon layer and a wear-resistant coating outside the copper rectangular wire main body, the utility model can effectively improve the overall wear resistance and adhesion performance of the enameled copper rectangular wire on the premise of ensuring the performance of the enameled wire paint (such as corona resistance performance, heat resistance performance, etc.), and reduce the phenomenon of the paint film falling off and being damaged. At the same time, the inner nylon layer of the present application is composed of a first nylon layer, a glass fiber layer distributed in a grid shape and a second nylon layer, which can further improve the tear resistance of the paint layer and reduce the phenomenon of the paint film falling off. To sum up, the utility model has the characteristic of effectively improving the wear resistance. Brief Description of the Drawings

[0008] Figure 1 is a schematic structural diagram of the present utility model.

[0009] The reference numerals in the drawings are: 1 - copper flat wire body, 2 - polyimide insulating paint, 3 - inner nylon layer, 4 - polybismaleimide-arylamine resin layer, 5 - polyamide-imide insulating paint layer, 6 - outer nylon layer, 7 - wear-resistant coating, 8 - metal oxide polyamide-imide paint layer, 301 - first nylon layer, 302 - second nylon layer, 303 - glass fiber layer, 9 - concave hole, 10 - outer glass fiber layer, 11 - stepped groove, 701 - bottom wear-resistant coating, 702 - external wear-resistant coating. Detailed Description of the Preferred Embodiments

[0010] The present utility model will be further described below in conjunction with the drawings and embodiments, but it shall not be used as a basis for limiting the present utility model.

[0011] Embodiment. The wear-resistant flat enameled copper wire is configured as shown in Figure 1 and includes a copper flat wire body 1. The outer surface of the copper flat wire body 1 is successively provided with a polyimide insulating paint 2, an inner nylon layer 3, a polybismaleimide-arylamine resin layer 4, a polyamide-imide insulating paint layer 5, and an outer nylon layer 6. The surface of the outer nylon layer 6 is provided with a wear-resistant coating 7; the inner nylon layer 3 includes a first nylon layer 301 and a second nylon layer 302, and the surface of the first nylon layer 301 is provided with a glass fiber layer 303 distributed in a grid pattern.

[0012] Stepped grooves 11 are provided at both flat narrow edges of the outer nylon layer 6. Concave holes 9 are provided on the surface of the stepped grooves 11, and an outer glass fiber layer 10 is further provided on the surface of the stepped grooves 11; the wear-resistant coating 7 includes a bottom wear-resistant coating 701 located in the stepped grooves 11, and an external wear-resistant coating 702 covering the outer nylon layer 6 and the bottom wear-resistant coating 701 is provided outside the bottom wear-resistant coating 701.

[0013] A metal oxide polyamide-imide paint layer 8 is further provided between the polyimide insulating paint 2 and the inner nylon layer 3.

[0014] In the present application, stepped grooves are provided at the flat narrow edges of the outer nylon layer, and a bottom wear-resistant coating is provided in the stepped grooves, so as to thicken the wear-resistant layers at both narrow edges, further improve the wear resistance of both narrow edges, and thus effectively improve the wear resistance of the overall enameled wire. At the same time, in the present application, concave holes and an outer glass fiber layer are provided on the surface of the stepped grooves, which can not only improve the adhesion performance, but also further improve the tear resistance of the overall wear-resistant coating.

[0015] The bottom wear-resistant coating is flush with the upper surface of the outer nylon layer.

[0016] The bottom wear-resistant coating and the external wear-resistant coating are integrally formed.

[0017] Preferably, the stepped groove includes a first-stage stepped groove located on the flat side of the outer nylon layer, and a second-stage stepped groove is provided between the inner side of the first-stage stepped groove and the outer nylon layer. This can effectively improve the adhesion performance of the wear-resistant coating.

[0018] The metal oxide polyamide-imide paint layer refers to a polyamide-imide paint layer containing metal oxides (the metal oxides can be nano-antimony metal oxides). It can improve the adhesion performance and has a certain electromagnetic shielding effect.

[0019] The preparation process of the present utility model: Polyimide insulating paint, metal oxide polyamide-imide paint layer, and the first nylon layer are sequentially coated on the surface of the copper flat wire body, then a grid-shaped glass fiber layer is adhered, and then the second nylon layer, polybismaleimide-arylamine resin layer, polyamide-imide insulating paint layer, and outer nylon layer are sequentially coated. Two-layer stepped grooves are formed at the two narrow ends of the outer nylon layer, and concave holes are provided on the surface of the stepped grooves, and then the outer glass fiber layer is adhered, and finally the bottom wear-resistant coating and the external wear-resistant coating (forming the wear-resistant coating) are coated. The flat enameled wire obtained by the above method can effectively improve the overall wear resistance and adhesion performance of the enameled copper flat wire on the premise of ensuring the performance of the enameled wire paint (such as corona resistance performance, heat resistance performance, etc.), and can also reduce the phenomenon of film peeling and damage.

Claims

1. Wear-resistant flat enameled copper wire, characterized in that: It includes a copper flat wire body (1), and successively arranged outside the copper flat wire body (1) are a polyimide insulating paint (2), an inner nylon layer (3), a polybismaleimide-arylamine resin layer (4), a polyamide-imide insulating paint layer (5), and an outer nylon layer (6). A wear-resistant coating (7) is provided on the surface of the outer nylon layer (6); the inner nylon layer (3) includes a first nylon layer (301) and a second nylon layer (302), and a glass fiber layer (303) distributed in a grid pattern is provided on the surface of the first nylon layer (301).

2. The wear-resistant flat enameled copper wire according to claim 1, wherein: Step grooves (11) are provided at both flat narrow ends of the outer nylon layer (6), concave holes (9) are provided on the surface of the step grooves (11), and an outer glass fiber layer (10) is also provided on the surface of the step grooves (11); the wear-resistant coating (7) includes a bottom wear-resistant coating (701) located in the step grooves (11), and an outer wear-resistant coating (702) covering the outer nylon layer (6) and the bottom wear-resistant coating (701) is provided outside the bottom wear-resistant coating (701).

3. The wear-resistant flat enameled copper wire according to claim 1, characterized in that: A metal oxide polyamide-imide paint layer (8) is also provided between the polyimide insulating paint (2) and the inner nylon layer (3).

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