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Main factors affecting the overall tensile properties of overhead wires

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Main factors affecting the overall tensile properties of overhead wires

作者: Release Date: 2018-07-21 Author: Click:

Overhead wire

The additional breaking force of the wire is calculated based on the strength of all aluminum single wires and reinforcements. However, the actual breaking force will have a certain deviation from the actual calculated value. The second reason is that the strength of each single wire has not been lost and is fully used. Therefore, when designing a product, you not only need to meet its minimum strength requirements, but also think about how to discover the strength of each single line. Not only is the data ample application, the overall function of the wire will also be greatly improved. Can start from the following aspects.

First, start from the intensity and adjust the average of each single line.

Depending on the strength of each single wire, the level of stress bearing is also different. It is as if the tension sensor has an excellent stretch range. Exceeding its range will not only damage the device, but also form a data bias. The same is true for aluminum single wires, and the levels of stress bearing of aluminum single wires of different strengths are also different. When these single wires with higher strength are twisted together, the stress is evenly distributed to each single wire, the single wire with low strength will break early due to insufficient load level, and the single wire with high strength will not perform its function. . Therefore, the extreme strength is an important parameter for the functional application rate of the inspection machine.

2. Adjust the size of the elongation and pitch ratio from the elongation and pitch ratio.

The influence of the elongation of the steel wire on the overall tensile function is also significant. A small number of experiments have proved that the overall breaking force of the aluminum-clad steel core aluminum stranded wire can easily present an unqualified scene. The second reason is that the elongation of aluminum clad steel is too small. The application rate of aluminum wire machine functions is too low. When the aluminum wire is twisted, the smaller the pitch, the better its extension function. The higher the elongation requirements of the steel wire. The elongation of aluminum clad steel wire is about 1.0, and the aluminum wire is also about 1.0. Adding the amount of expansion and contraction of the twisting pitch, the elongation of steel wire is far from enough. Therefore, the wire design for the aluminum clad steel wire can appropriately increase the ratio of its diameter to diameter, reduce the difference in elongation between the aluminum clad steel wire and the aluminum wire, and further promote the machine functions of the aluminum wire. In short, the elongation of the aluminum wire + the elongation due to the pitch = the elongation of the steel wire.

3. From the display structure, the single-line elongation with large elongation is displayed on the outer layer.

Experiments have shown that single-line fractures are mostly fractured in the outer layer. The elongation of the outer layer is also a key factor affecting the overall breaking force. When the strength of the single wire is constant, the higher the elongation is, the higher the strength of the single wire machine can be.

At present, most of the functions of wires are not fully developed, and the remaining margins are very large. This process is a process of temporary exploration. It requires a small amount of experiments and data analysis. Here is just an idea, focusing on theory. In short, when designing a product, the purpose is that when the wire is extended to 1%, all single wires can be developed to an excellent effect, so that the overall function of the wire will be greatly improved.

URL of this article: http://pdaavenue.com/足球彩票/378.html

Keywords: overhead wire

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