Techniques for improving the overall performance of aluminum conductor aluminum alloy reinforced

Techniques for improving the overall performance of aluminum conductor aluminum alloy reinforced

The tensile rating of the wire is calculated based on the strength of all aluminum single wires and stiffeners. However, there is a certain deviation between the actual tensile force and the real calculated value. The main reason is that the strength of each single wire has not been fully utilized. Therefore, when designing products, we should not only meet the minimum strength requirements, but also consider how to excavate the strength of each single wire. Not only is it a full use of the material, the overall performance of the wire will also be greatly improved.

With the continuous upgrading of the power system, a variety of new products emerge at the right moment, such as steel core aluminum strand, aluminum clad steel core aluminum strand, aluminum clad steel core aluminum strand, aluminum alloy strand, aluminum alloy core aluminum strand, aluminum alloy core aluminum strand, aluminum clad steel core heat-resistant aluminum alloy strand and so on. But the whole tensile property is always a big problem in the design of overhead stranded wire products.

Techniques for improving the overall performance of aluminum alloy cored aluminum strand:

First, adjust the uniformity of each single line from the strength.

Each single line according to the size of its strength, the stress bearing degree is also different.Just as a tension sensor has an optimal stretch range, exceeding that range will not only damage the device, but also cause deviation in the data. Aluminum single line is the same, different strength of aluminum single line on the stress bearing degree is different. When these single wires with large strength deviation are twisted together, the stress is evenly distributed to each single wire, and the single wire with small strength will break in advance due to insufficient bearing degree, while the single wire with large strength will not play its role. Therefore, strength range is an important parameter to test the utilization rate of mechanical performance.

2. Adjust the elongation and section to diameter ratio from the point of view of the elongation and section to diameter ratio.

The elongation of steel wire also has a great influence on the overall tensile properties. A large number of experiments have proved that the overall tensile force of aluminum clad steel core aluminum stranded wire is easy to appear unqualified phenomenon. The main reason is that the elongation of aluminum clad steel is too small. Low utilization of mechanical properties of aluminum wire. When the aluminum wire is twisted, the smaller the pitch, the better its ductility. The higher the elongation requirement of steel wire. And the elongation of aluminum clad steel wire is about 1.0, aluminum wire is also about 1.0, plus the expansion of the stranded pitch, the elongation of steel wire is far from enough. Therefore, the wire design of aluminum clad steel wire can appropriately increase the section diameter ratio, reduce the difference in elongation between aluminum clad steel wire and aluminum wire, and give more play to the mechanical properties of aluminum wire. In summary, aluminum wire elongation + pitch elongation = steel wire elongation.

3. Starting from the arrangement structure, the arrangement with greater single line elongation is in the outermost layer.

The test shows that the single-line fracture is mostly in the outermost layer. The elongation of the outermost layer is also a key factor affecting the overall tensile force. When the strength of a single wire is constant, the higher the elongation, the maximum effect of the mechanical properties of a single wire with high strength can be achieved.

At present, the performance of most conductors has not been fully played, and the margin is very large. This process is a long-term exploration process, which requires a lot of experiments and data analysis. Here is just an idea, focusing on practice. In short, when designing a product, the ultimate goal is that when the wire reaches 1% length, all the single wires can play the best effect, so that the overall performance of the wire will be greatly improved.