Nanocomposite wire

FIELD: electricity.

SUBSTANCE: at a core (1) made of a steel wire layers of current-conducting wires of two types are wound - aluminium wire (2) and nanocomposite wire (3). The layers of wire (3) are alternated with the layers of wire (2). The layer of wire (3) is wound to the core (1). The wire (3) is formed of a wire stock (wire rod) produced of a nanocomposite material based on aluminium with a nanoparticle filler made as multilayer carbon nanotubes and reinforced in the process of multiple cold drawing of the wire stock up to the preset diameter.

EFFECT: increased capacity, mechanical strength and resistivity to sagging without an increase in its weight.

2 cl, 1 dwg

 

Area of technology

The invention relates to power engineering and can be used in stranded wires for overhead power lines. The level of technology

Known wire containing a carrier core coated with a metallic conductive material of high conductivity. The core is made of a composite material with a matrix of synthetic resin modified carbon clusters fulleroid type (fullerenes and/or nanotubes, and/or astralene) [patent RU No. 23 87035]. The coated core is made of a metallic material of high conductivity (copper and/or aluminum, or steel, or their alloys with other metals).

It does not allow the simultaneous optimization of mechanical and electrical characteristics of the wire, since the mechanical characteristics of the wire are determined by the properties of the carrier core and the coating is involved only in providing bandwidth of the wire.

Known electrical wire aluminum alloy (patent RU №2422223, IPC B21C 1/00, 2010), which contains the core and located around the surface layer increased microplanet obtained by drawing wire rod, tensile strength and electrical conductivity which is greater than that of the core. Aluminum alloy, made of Provo�of an eye, contains (in wt.%): iron of 0.5-0.7; silicon 0,2-0,4; cerium, lanthanum, praseodymium in the amount of 6,0-10,0; admixture 0.1 to 0.3; the rest is aluminum.

The disadvantage of this solution is the need to use the aluminium alloy, which manufactured wire, special materials (expensive rare earth elements), and the reduced strength of the inner regions (core) wire.

Known selected as a prototype "Wire for transmission lines" according to the patent RU No. 2063080. The wire contains a steel core and multiple conductive layers of aluminum wires. The core is made of a nitrogen-containing non-magnetic austenitic steel with low magnetic permeability and high strength. Aluminum braids made of wires of different diameters (the largest is the diameter of the wires of the outer layer) and provide high-throughput wire current.

The disadvantage of the prototype is that the mechanical stress on the wire is perceived almost exclusively steel core, resulting in reduced mechanical strength of the wire and its resistance to sagging in long-term effects of mechanical loading.

The disclosure of the essence of the invention

The subject invention is a wire for the transmission line containing steel CE�the core and the layers of aluminum wire, alternating with layers of nanocomposite wire aluminum base filled with multi-walled carbon nanotubes, multiple hardened by cold drawing to the specified diameter.

This allows to increase the mechanical strength and resistance to sagging wires without increasing its weight and reduce the bandwidth for the current.

The invention involves clarifying the development, consisting in the fact that the steel core wound Powel of nanocomposite wire. The implementation of the invention with regard to its development

The figure illustrates the inventive design of the core wire 1 made of steel wire, which is wound a helix of conductive wire - aluminum wire 2 and nanocomposite wire 3. The wire braids 2 layers alternate with layers of wire 3. The core 1 is wound Powel wire 3.

The wire 3 is formed of wire rod (wire rod), obtained from the nanocomposite material, comprising a base (aluminum) and a filler in the form of multiwall carbon nanotubes (nanoparticles). The use of aluminum-based material provides high conductive, and a core of nanoparticles (multiwall carbon nanotubes) - high mechanical strength.

In re the cold veloce�Oia wire stock (i.e. successive cold drawing of wire rod through a series of dies with decreasing hole diameter) nanocomposite wire is hardened due to plastic deformation, which increases the degree of interaction between the base and filler.

In the manufacture of steel wire on a core of alternating layers is wound a helix of conductive wire 3 and 2.

Increased mechanical strength of the wires of the claimed design is achieved due to the fact that the mechanical stress on the wire is perceived not only its steel core 1, but braids conductive nanocomposite wire 3.

It was established experimentally that the layer-by-layer alternating layers of nanocomposite wire with 3 layers of aluminum wire 2 provides the optimal combination of mechanical strength and resistance to sagging wires with high bandwidth current.

An example of a specific implementation of the inventive wire. Wire, the design of which is shown in the figure, has a core of steel wire 1 with the index of the temporary tensile strength of 1400 MPa and a helix of conductive wire 3 and 2 arranged alternating layers around the core 1. In this example, the first layer (closest to the core 1) form 6 nanocomposite wires 3, �Torah layer 12 aluminum wires 2, the third layer 18 of nanocomposite wires 3. For wires figure 3 temporary tensile strength is 150 MPa.

Electric wire resistance DC at 20°C-0,1179 Ohm/km Weight wire - 756 kg/km. the breaking Force for such a cable is 73513 N, which is 53% higher than that of steel-aluminum wire suitable weight.

1. Wire for electrical transmission lines, containing a steel core and the layers of aluminum wire, alternating with layers of nanocomposite wire aluminum base filled with multi-walled carbon nanotubes, multiple hardened by cold drawing to the specified diameter.

2. The wire according to claim 1, wherein the steel core wound Powel of nanocomposite wire.



 

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