A heat dissipation enhanced high-strength aluminum enameled wire

Abstract

The utility model relates to aluminium wire enameled wire technical field, and specifically is a kind of heat dissipation enhancement type high-strength aluminium wire enameled wire, including the aluminium alloy core wire of multiple strand lay, the outer surface of aluminium alloy core wire is coated with high heat-conducting insulating paint layer, the lay center of aluminium alloy core wire is equipped with the heat dissipation channel of axial through, the heat dissipation channel is filled with continuous heat-conducting fibre bundle, the lay body outer surface of aluminium alloy core wire is covered with heat-conducting interface material layer, the utility model is filled with continuous heat-conducting fibre bundle by the working cooperation between the aluminium alloy core wire of multiple strand lay, the outer surface coating of high heat-conducting insulating paint layer of it, the heat dissipation channel of axial through equipped with in lay center, and the heat-conducting interface material layer covered in lay body outer surface, and the efficient heat dissipation path of multiple synergies is formed, the purpose of enhancing aluminium wire enameled wire heat dissipation performance is realized.

Description

Technical Field

[0001] This utility model relates to the field of aluminum enameled wire technology, specifically a heat dissipation enhanced high-strength aluminum enameled wire. Background Technology

[0002] Advantages of aluminum enameled wire: Aluminum has advantages such as low density, relatively low price compared to copper, and abundant resources. Replacing copper enameled wire with aluminum enameled wire can significantly reduce the cost and weight of electromagnetic components, and has broad application prospects in new energy vehicles, industrial motors, and home appliances.

[0003] Existing technical problems: Miniaturization of electromagnetic components leads to increased winding temperature rise. Although aluminum has a better thermal conductivity than copper, the thermal conductivity of traditional enameled wire insulation is extremely poor, making it difficult for heat to dissipate from the inside of the conductor. Utility Model Content

[0004] The purpose of this invention is to provide a heat-dissipating enhanced high-strength aluminum enameled wire to solve the problems mentioned in the background art.

[0005] The technical solution of this utility model is: a heat dissipation enhanced high-strength aluminum enameled wire, comprising a multi-stranded aluminum alloy core wire, the outer surface of which is coated with a high thermal conductivity insulating varnish layer, an axially penetrating heat dissipation channel is provided at the center of the stranding of the aluminum alloy core wire, the heat dissipation channel is filled with a continuous thermally conductive fiber bundle, and the outer surface of the stranded aluminum alloy core wire is covered with a thermally conductive interface material layer.

[0006] The aforementioned components achieve the following effect: through the working cooperation between the multi-stranded aluminum alloy core wire, the high thermal conductivity insulating varnish coating on its outer surface, the continuous thermally conductive fiber bundle filled with an axially penetrating heat dissipation channel at the center of the stranding, and the thermally conductive interface material layer covering the outer surface of the stranded wire, the aluminum alloy core wire itself can conduct heat, the high thermal conductivity insulating varnish layer can transfer the heat of the core wire to the outside, the thermally conductive fiber bundle can quickly conduct internal heat through the heat dissipation channel, and the thermally conductive interface material layer can promote the dissipation of heat to the external environment. The synergy of these multiple components forms an efficient heat dissipation path, thereby enhancing the heat dissipation performance of the aluminum enameled wire, improving the heat dissipation efficiency of the electromagnetic component during operation, and avoiding performance impact due to excessive temperature rise.

[0007] Preferably, the high thermal conductivity insulating varnish layer is a double-layer composite structure, comprising a bottom varnish film adhered to the surface of the aluminum alloy core wire and an outer varnish film coated on the surface of the bottom varnish film.

[0008] The effect achieved by the above components is as follows: through the double-layer composite structure of the high thermal conductivity insulating varnish layer, namely the working cooperation between the bottom varnish film attached to the surface of the aluminum alloy core wire and the outer varnish film coated on the surface of the bottom varnish film, the bottom varnish film can be tightly attached to the surface of the core wire and efficiently receive the heat transferred by the core wire, while the outer varnish film can further conduct the heat transferred by the bottom varnish film outward. The two work together to improve the heat transfer efficiency, thereby achieving the purpose of enhancing the thermal conductivity of the insulating varnish layer and improving the heat transfer effect from the core wire to the external environment.

[0009] Preferably, the bottom coating is a high-adhesion polyesterimide coating and incorporates boron nitride nanosheets for constructing a lateral thermally conductive network, and the outer coating is a wear-resistant polyamide-imide coating and incorporates alumina nanowires for constructing a longitudinal thermally conductive path.

[0010] The effect achieved by the above components is as follows: through the working cooperation between the transverse thermal conductive network constructed by the high-adhesion polyesterimide varnish and the boron nitride nanosheets in the bottom layer varnish film, and the longitudinal thermal conductive path constructed by the wear-resistant polyamide-imide varnish and the alumina nanowires in the outer layer varnish film, the transverse thermal conductive network can uniformly disperse heat in the bottom layer varnish film, and the longitudinal thermal conductive path can quickly transfer heat to the outside along the outer layer varnish film. The two form a three-dimensional thermal conductive system, which realizes the purpose of optimizing the thermal conductivity of the high thermal conductivity insulating varnish layer and improves the heat transfer speed and uniformity in the insulating varnish layer.

[0011] Preferably, the stranding structure of the aluminum alloy core wire is a non-equal pitch layered stranding, and the inner layer stranding pitch is smaller than the outer layer stranding pitch.

[0012] The effect achieved by the above components is as follows: through the non-equal pitch layered stranding structure of the aluminum alloy core wire, and the technical feature that the inner layer stranding pitch is smaller than the outer layer stranding pitch, the denser stranding of the inner layer can enhance the structural stability of the core wire and promote internal heat conduction, while the sparser stranding of the outer layer reduces the obstruction to the outward transfer of heat. This achieves the goal of optimizing heat dissipation conditions while ensuring the strength of the core wire, and improves the overall heat dissipation efficiency and structural strength of the core wire.

[0013] Preferably, the surface of the aluminum alloy core wire is subjected to micro-arc oxidation treatment to form a ceramic layer.

[0014] The effect achieved by the above-mentioned components is as follows: through the technical feature of forming a ceramic layer on the surface of the aluminum alloy core wire through micro-arc oxidation treatment, the ceramic layer not only enhances the hardness and wear resistance of the core wire surface, but also has a certain thermal conductivity, which can assist the core wire in transferring heat. This achieves the purpose of improving the surface performance of the aluminum alloy core wire and assisting in heat dissipation, thereby improving the service life of the core wire and the heat conduction effect.

[0015] Preferably, the thermally conductive interface material layer is thermally conductive silicone grease or silicone rubber.

[0016] The effect achieved by the above-mentioned components is that, through the technical feature of using thermally conductive silicone grease or silicone rubber as the thermal interface material layer, it can fill the gap between the aluminum enameled wire and the external contact components, reduce the contact thermal resistance, promote the rapid transfer of heat from the aluminum enameled wire to the outside, achieve the purpose of enhancing the heat exchange capacity between the aluminum enameled wire and the external environment, and improve the efficiency of heat dissipation to the outside.

[0017] This utility model provides a heat-dissipating enhanced high-strength aluminum enameled wire, which has the following improvements and advantages compared with the prior art:

[0018] Firstly, this utility model utilizes the working cooperation between a multi-stranded aluminum alloy core wire, a high thermal conductivity insulating varnish coating on its outer surface, a continuous thermally conductive fiber bundle filled with an axially penetrating heat dissipation channel at the center of the stranding, and a thermally conductive interface material layer covering the outer surface of the stranding. The aluminum alloy core wire itself can conduct heat, the high thermal conductivity insulating varnish layer can transfer the heat of the core wire to the outside, the thermally conductive fiber bundle can quickly conduct internal heat through the heat dissipation channel, and the thermally conductive interface material layer can promote the dissipation of heat to the external environment. The synergy of these multiple components forms an efficient heat dissipation path, thereby achieving the purpose of enhancing the heat dissipation performance of the aluminum enameled wire.

[0019] Secondly, this invention utilizes the lateral thermal conductivity network constructed by the highly adhesive polyesterimide varnish and boron nitride nanosheets in the bottom layer of the coating film, and the longitudinal thermal conductivity path constructed by the wear-resistant polyamide-imide varnish and alumina nanowires in the outer layer of the coating film. The lateral thermal conductivity network can uniformly distribute heat within the bottom layer of the coating film, while the longitudinal thermal conductivity path can rapidly transfer heat to the outside along the outer layer of the coating film. The two form a three-dimensional thermal conductivity system, achieving the goal of optimizing the thermal conductivity performance of the high thermal conductivity insulating coating layer and improving the speed and uniformity of heat transfer within the insulating coating layer. Attached Figure Description

[0020] The present invention will be further explained below with reference to the accompanying drawings and embodiments:

[0021] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0022] Figure 2 This is a three-dimensional structural diagram of the aluminum alloy core wire stranded structure in this utility model;

[0023] Figure 3 This is a schematic cross-sectional view of the aluminum alloy core wire in this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Aluminum alloy core wire; 2. Thermally conductive fiber bundle; 3. Thermally conductive interface material layer; 4. Underlying coating; 5. Outer coating. Detailed Implementation

[0026] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0027] This utility model provides a heat-dissipating enhanced high-strength aluminum enameled wire through improvements. The technical solution of this utility model is as follows:

[0028] In embodiments of this utility model, such as Figures 1-3 As shown, a heat dissipation enhanced high-strength aluminum enameled wire includes a multi-stranded aluminum alloy core wire 1. The stranding structure of the aluminum alloy core wire 1 is non-equidistant layered stranding, and the inner layer stranding pitch is smaller than the outer layer stranding pitch. The denser inner stranding can enhance the structural stability of the core wire and promote internal heat conduction, while the sparser outer stranding reduces the obstruction to heat transfer to the outside. This achieves the goal of optimizing heat dissipation conditions while ensuring the strength of the core wire. The surface of the aluminum alloy core wire 1 is treated with micro-arc oxidation to form a ceramic layer. The ceramic layer not only enhances the surface hardness and wear resistance of the core wire, but also has a certain thermal conductivity, which can assist the core wire in transferring heat.

[0029] The outer surface of the aluminum alloy core wire 1 is coated with a high thermal conductivity insulating varnish layer. This high thermal conductivity insulating varnish layer has a double-layer composite structure, comprising a bottom varnish film 4 adhered to the surface of the aluminum alloy core wire 1 and an outer varnish film 5 coated on the surface of the bottom varnish film 4. Through the double-layer composite structure of the high thermal conductivity insulating varnish layer, i.e., the working cooperation between the bottom varnish film 4 and the outer varnish film 5, the bottom varnish film 4 can adhere tightly to the core wire surface, efficiently absorbing the heat transferred by the core wire. The outer varnish film 5 can further conduct the heat transferred by the bottom varnish film 4 outwards. The bottom varnish film 4 is a highly adhesive polyesterimide varnish and contains... Boron nitride nanosheets are incorporated to construct a lateral thermal conductive network. The outer coating 5 is a wear-resistant polyamide-imide coating with alumina nanowires incorporated to construct a longitudinal thermal conductive path. The lateral thermal conductive network constructed by the high-adhesion polyester-imide coating and the incorporated boron nitride nanosheets in the bottom coating 4, and the longitudinal thermal conductive path constructed by the wear-resistant polyamide-imide coating and the incorporated alumina nanowires in the outer coating 5 work together. The lateral thermal conductive network can uniformly disperse heat within the bottom coating 4, and the longitudinal thermal conductive path can quickly transfer heat to the outside along the outer coating 5. The two form a three-dimensional thermal conductive system, achieving the goal of optimizing the thermal conductivity of the high thermal conductivity insulating coating layer.

[0030] An axially penetrating heat dissipation channel is provided at the twisting center of the aluminum alloy core wire 1. The heat dissipation channel is filled with a continuous thermally conductive fiber bundle 2, which forms a continuous longitudinal heat dissipation medium.

[0031] The outer surface of the stranded aluminum alloy core wire 1 is covered with a thermally conductive interface material layer 3, which is thermally conductive silicone grease or silicone rubber. This layer fills the gap between the aluminum enameled wire and the external contact parts, reduces the contact thermal resistance, and promotes the rapid transfer of heat from the aluminum enameled wire to the outside, thereby enhancing the heat exchange capacity between the aluminum enameled wire and the external environment.

[0032] The working principle of the heat dissipation enhanced high-strength aluminum enameled wire provided by this utility model is as follows: Preparation of aluminum alloy core wire 1: Aluminum, magnesium, silicon and other alloying elements are melted in proportion, and nano-ceramic particles are added to form a high-strength aluminum alloy billet. The billet is processed into a single strand of aluminum alloy core wire 1 by wire drawing process. Then, the surface of core wire 1 is subjected to micro-arc oxidation treatment to form a ceramic layer to enhance surface hardness and thermal conductivity.

[0033] Underlayer coating 4: A high-adhesion polyesterimide varnish containing boron nitride nanosheets is coated on the surface of the stranded aluminum alloy core wire 1 as the underlayer coating 4. A transverse thermally conductive network is constructed through the nanosheets, and a thermally conductive layer that is tightly attached to the aluminum alloy core wire 1 is formed after curing.

[0034] Outer coating 5: A wear-resistant polyamide-imide paint doped with alumina nanowires is coated on the surface of the bottom coating 4 as the outer coating 5. The nanowires are used to construct a longitudinal heat conduction path, and after curing, a high thermal conductivity insulating coating layer with a double-layer composite structure is formed.

[0035] Thermal interface material layer 3 treatment: Thermal grease or silicone rubber is coated on the outer surface of the high thermal conductivity insulating varnish layer to form thermal interface material layer 3, which fills the gap with the external contact and reduces thermal resistance.

[0036] Stranded structure forming: A non-equidistant pitch layered stranding process is adopted to strand multiple aluminum alloy core wires 1. The inner layer is set with a smaller stranding pitch to enhance the structural strength and internal heat conduction efficiency, while the outer layer is set with a larger stranding pitch to reduce the obstruction to heat transfer. An axially through heat dissipation channel is reserved in the center of the stranding and filled with continuous heat-conducting fiber bundles 2.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heat-dissipating enhanced high-strength aluminum enameled wire, characterized in that, include: A multi-stranded aluminum alloy core wire (1) is coated with a high thermal conductivity insulating varnish layer on its outer surface. An axially penetrating heat dissipation channel is provided in the center of the stranding of the aluminum alloy core wire (1). The heat dissipation channel is filled with a continuous thermally conductive fiber bundle (2). The outer surface of the stranded aluminum alloy core wire (1) is covered with a thermally conductive interface material layer (3).

2. The heat-dissipating enhanced high-strength aluminum enameled wire according to claim 1, characterized in that: The high thermal conductivity insulating varnish layer is a double-layer composite structure, which includes a bottom layer varnish film (4) attached to the surface of the aluminum alloy core wire (1) and an outer layer varnish film (5) coated on the surface of the bottom layer varnish film (4).

3. The heat-dissipating enhanced high-strength aluminum enameled wire according to claim 2, characterized in that: The bottom layer paint film (4) is a high-adhesion polyesterimide paint and incorporates boron nitride nanosheets for constructing a transverse heat-conducting network. The outer layer paint film (5) is a wear-resistant polyamide-imide paint and incorporates alumina nanowires for constructing a longitudinal heat-conducting path.

4. The heat-dissipating enhanced high-strength aluminum enameled wire according to claim 1, characterized in that: The aluminum alloy core wire (1) has a stranding structure of non-equal pitch layered stranding, and the inner layer stranding pitch is smaller than the outer layer stranding pitch.

5. The heat-dissipating enhanced high-strength aluminum enameled wire according to claim 1, characterized in that: The surface of the aluminum alloy core wire (1) is treated with micro-arc oxidation to form a ceramic layer.

6. The heat-dissipating enhanced high-strength aluminum enameled wire according to claim 1, characterized in that: The thermal interface material layer (3) is thermal grease or silicone rubber.

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