采用台架试验方法对电动运输的滑动触点进行了试验,确定了触点导线的磨损情况

A. Mukha, D. Ustymenko, R. Krasnov, Mohammad Al Said Ahmad
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The purpose of the research is to determine the possibility of using various types of linings on the electric rolling stock of railways, with the determination of the value of the wear of the contact wire and its comparison with the standard. Methodology. The main research method is an experiment on a test bench with control of the main indicators, which include – contact current, clamping force, speed of rotation of the disk of the test bench, temperature in the contact zone. The method of bench tests is standardized, in accordance with DSTU GOST 32680: 2016. Results. During the experiments on the test bench, six types of pantograph contact strips were investigated, and the indicators on the amount of contact wire wear were obtained. Determination of the wear of the contact wire is carried out as the difference between the heights of the contact wire before and after the experiment. The wear values of the contact wire were recorded every 10 thousand passes of the test bench disk. The obtained values of wear are stochastic probabilistic in nature, so they were processed by methods of mathematical statistics to determine the value of the mathematical expectation of the amount of wear of the contact wire. Based on the obtained values, the relationships between the amount of wear of the contact wire and the number of revolutions of the test disk of the stand are constructed. Originality. The scientific novelty of the research lies in the obtained relationships between the number of passes and contact wire wear for different types of samples of pantograph contact strips of electric rolling stock of railways, which allows to determine the contact wire resource when implementing different types of current collector inserts. Practical value. The main purpose of bench tests is to reproduce the conditions of actual operation with certain restrictions. Test specimens in bench tests were in the same conditions, so the obtained values of wear of the contact wire for different types of contact strips allow to estimate the possible service life of the sliding high-current contact in real operating conditions. The obtained values are relative, the first type of inserts is accepted as a base sample, which allows to determine the quantitative indicators of wear of contact strips in comparison with this reference sample. The normative value of contact wire wear is 40 μm per 10 thousand passes of the test bench disk. The tests are considered successful if the wear of the contact wire does not exceed the specified standard value. According to the test results, three samples of contact strips were identified, the use of which will not lead to wear of the contact wire above the normative value. 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引用次数: 0

摘要

目的。铁路的电动机车车辆使用大电流滑动触点将能量传递给机车或电动列车,从25kv交流或3kv直流架空触点网络接收电力,而电流可达到2500a的值。当然,这种滑动接触的可靠性决定了机组的运行可靠性。一般的电力运输。电力机车或电力列车的受电弓上装有受电弓——带接触条的受电弓,在沿接触线滑动时应尽量减少对受电弓的损坏和磨损。在引入受电弓接触条新材料时,必须通过试验,其中有台架试验,以确定接触线的磨损情况。本研究的目的是通过测定接触导线的磨损值并与标准进行比较,确定铁路电气化车辆上使用各种类型衬里的可能性。方法。主要研究方法是在试验台上进行实验,并控制主要指标,包括接触电流、夹紧力、试验台盘的旋转速度、接触区温度。台架试验方法是标准化的,符合DSTU GOST 32680: 2016。结果。在试验台试验中,对6种受电弓接触条进行了研究,得到了接触丝磨损量的指标。通过实验前后接触线的高度差来确定接触线的磨损情况。每经过试验台盘1万次,记录接触丝的磨损值。所得的磨损值具有随机概率性质,因此采用数理统计的方法对其进行处理,确定接触丝磨损量的数学期望值。在此基础上,建立了接触丝磨损量与机架试验盘转数之间的关系。创意。本研究的科学新颖之处在于,获得了不同类型铁路电路车受电弓接触条试样的道次数与接触线磨损之间的关系,从而可以确定不同类型集流插片实施时的接触线资源。实用价值。台架试验的主要目的是在一定的限制条件下再现实际操作条件。台架试验的试样在相同的工况下,因此得到的不同类型接触条接触导线的磨损值,可以估算出滑动大电流触头在实际工况下可能的使用寿命。所获得的值是相对的,第一种类型的刀片被接受为基本样本,它允许与该参考样本进行比较,以确定接触条磨损的定量指标。试验台盘接触丝磨损标准值为每万次40 μm。如果接触线的磨损不超过规定的标准值,则认为测试成功。根据试验结果,鉴定了三种接触条样品,使用后不会导致接触线磨损高于标准值。得到了三种类型接触条的解析表达式,从而可以得到滑动大电流接触条的资源指标的比较值。图11、表2、参考文献13。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
THE RESULTS OF BENCH TESTS OF THE SLIDING CONTACT OF ELECTRIC TRANSPORT TO DETERMINE THE WEAR OF THE CONTACT WIRE
Purpose. Electric rolling stock of railways receives power from a 25 kV AC or 3 kV DC overhead contact network using a high-current sliding contact that transfers energy to locomotive or electric train, while the current can reach values of 2500 A. Of course, the reliability of this sliding contact determines the operational reliability of the unit. electric transport in general. The pantograph of an electric locomotive or electric train is equipped with a pantograph – a pantograph with contact strip, which should damage and wear it to a minimum when sliding along the contact wire. When introducing new materials for pantograph contact strip, they must pass tests, among which there are bench tests to determine the wear of the contact wire. The purpose of the research is to determine the possibility of using various types of linings on the electric rolling stock of railways, with the determination of the value of the wear of the contact wire and its comparison with the standard. Methodology. The main research method is an experiment on a test bench with control of the main indicators, which include – contact current, clamping force, speed of rotation of the disk of the test bench, temperature in the contact zone. The method of bench tests is standardized, in accordance with DSTU GOST 32680: 2016. Results. During the experiments on the test bench, six types of pantograph contact strips were investigated, and the indicators on the amount of contact wire wear were obtained. Determination of the wear of the contact wire is carried out as the difference between the heights of the contact wire before and after the experiment. The wear values of the contact wire were recorded every 10 thousand passes of the test bench disk. The obtained values of wear are stochastic probabilistic in nature, so they were processed by methods of mathematical statistics to determine the value of the mathematical expectation of the amount of wear of the contact wire. Based on the obtained values, the relationships between the amount of wear of the contact wire and the number of revolutions of the test disk of the stand are constructed. Originality. The scientific novelty of the research lies in the obtained relationships between the number of passes and contact wire wear for different types of samples of pantograph contact strips of electric rolling stock of railways, which allows to determine the contact wire resource when implementing different types of current collector inserts. Practical value. The main purpose of bench tests is to reproduce the conditions of actual operation with certain restrictions. Test specimens in bench tests were in the same conditions, so the obtained values of wear of the contact wire for different types of contact strips allow to estimate the possible service life of the sliding high-current contact in real operating conditions. The obtained values are relative, the first type of inserts is accepted as a base sample, which allows to determine the quantitative indicators of wear of contact strips in comparison with this reference sample. The normative value of contact wire wear is 40 μm per 10 thousand passes of the test bench disk. The tests are considered successful if the wear of the contact wire does not exceed the specified standard value. According to the test results, three samples of contact strips were identified, the use of which will not lead to wear of the contact wire above the normative value. Analytical expressions are obtained for three types of contact strips, with the help of which it is possible to obtain comparative values of resource indicators of sliding high-current contact. Figures 11, tables 2, references 13.
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