EVALUATION OF INDICATORS OF TRANSPORTATION WORK OF THE DIESEL LOCOMOTIVES ON THE MAROKAND - KATTAKURGAN DISTRICT OF UZBEK RAILWAY

ABSTRACT

Introduced the results of the investigation of the transport logistics on validation of transportation working of the 3ТЕ10М diesel locomotives оn a hilly-mountainous road section of railway track by of the movement freight trains with and without stopping on through stations, passing-tracks and division points.

АННОТАЦИЯ

Представлены результаты исследований по обоснованию логистических показателей перевозочной работы тепловозов 3ТЭ10М на холмисто – горном участке железной дороги при движении грузовых поездов без остановок и с остановками на промежуточных станциях, разъездах и раздельных пунктах.

Keywords: investigation, result, the freight train, the diesel locomotive, railway track, transport logistics, exploitation, the stage, analysis, the station, hilly - mountainous

Ключевые слова: исследование, результат, грузовой поезд, тепловоз, железнодорожный путь, транспортная логистика, эксплуатация, разъезд, анализ, станция, холмисто - горный.

The solution of some problems of transport logistics of a comprehensive program for the development and modernization of the railway industry of Uzbekistan for the current years is directly related to a clear formulation and correct justification for increasing the efficiency of using the locomotive fleet of the JSC "Uzbekiston Temir Yullari", which also includes a diesel fleet.

The most important, key and most important factor in transport logistics, along with the traction qualities and properties of the track profile of railway sections, is a complex system of basic logistical indicators of the energy efficiency of train electric traction.

Therefore, the study of the logistic indicators of the efficiency of the transportation work of the main locomotives of diesel traction on sections of Uzbek railways of various difficulty is an urgent task of the Joint Stock Company "Uzbekiston Temir Yullari".

There are flat, hilly, hilly-mountainous and mountainous railway sections [1]. Each of these types of relief has a significant impact not only on the nature of the movement of the train, but also on the operation of power electrical installations and the efficiency of the traction and energy characteristics of locomotives, and as a result, on the main logistical indicators of the energy efficiency of electric traction of trains.

The article presents the substantiation of the main logistical indicators of the efficiency of freight transportation of diesel traction locomotives in real traffic conditions on one of the hilly-mountainous sections of the Uzbek railway. And also, an assessment is given of the influence of the parameters indicated above on the energy efficiency of the electric traction of the locomotive, taking into account the properties of the profile of the railway section.

The object of the study are three-section mainline freight diesel locomotives of the 3TE10M series and a straightened section of the Marokand - Kattakurgan track section of the hilly-mountainous direction Samarkand - Navoi - Bukhara of "Uzbekiston Temir Yullari" JSC. The subject of the study is the main logistical indicators, such as speed and time, the movement of a freight train of a standard mass of rolling stock, and the logistical parameters of energy intensity, which include the cost of natural diesel fuel for train traction. This article will consider the efficiency of the fuel and energy use of diesel locomotives 3TE10M on the Marokand - Kattakurgan section of the Uzbek railway.

The research method provides for the analysis and evaluation of various traction quality and track profile properties [2,3,4]. Using the method of "assessing the efficiency of using diesel traction rolling stock on a hilly-mountainous section of the railway" [2], the authors carry out an analysis according to the criterion of difficulty and complexity of each stage of a given section of Marokand - Kattakurgan "Uzbekiston Temir Yullari" JSC. The basis of the results of the study is the logistic indicators of the efficiency of the transportation work of diesel traction locomotives. The evaluation criterion was the reduced values of the total (total) and specific consumption of full-scale diesel fuel for train traction for various options for the movement of freight trains [5]. The criterion for evaluating fuel consumption is characterized by the operation of power plants of the locomotive, in traction mode, per unit of time, in real operating conditions. Based on the results of the research, the values of the logistic indicators of the movement of a freight train of standard mass Q=3000 tons (number of axles m=200 axles) were obtained (table 1). The logistic parameters of the energy intensity of the freight locomotive 3TE10M are shown in table 2 calculations were made for each stage of the hilly-mountain section of Marokand - Kattakurgan of the Joint Stock Company "Uzbekiston Temir Yullari".

Table 1.

Logistic indicators of the movement of a freight train on hauls section Marokand – Kattakurgan, non-stop traffic

Table 2.

Logistic parameters of energy intensity of diesel locomotives 3TE10M when a freight train moves along the section Marokand - Kattakurgan

An analysis of the operation of diesel locomotives 3TE10M on the hilly-mountainous section of the Joint-Stock Company "Uzbekiston Temir Yullari" (Table. 1), and studies carried out earlier [3, 4] showed that the movement of freight trains on the section Marokand - Kattakurgan, which runs without stopping at intermediate stations, sidings and separate points, provides:

• a decrease in the train travel time by 8.05 minutes and an increase in the technical speed of movement by 9.75 km/h with an average estimated time per stop of approximately 2.68 minutes;
• the share of movement in traction modes in 26.72 percent, and idling and braking in 73.28 percent;
• a decrease in the share of traffic in the traction mode and its increase in the idling and braking mode by 5.13 percent compared to the movement of a freight train with stops at intermediate stations and sidings.

Based on the research done, graphs of the distribution of the logistic parameters of energy intensity were plotted (Figure 1 and Figure 2). The values of full-scale diesel fuel consumption for train traction are plotted along the y-axis: E, e - respectively, total (total) and specific, and E*, e* - respectively, reduced total (total) and specific. The values of the total consumption E of full-scale diesel fuel per trip and the evaluation criteria E* and e* of the traction quality and the properties of the track profile in fig. 1 and fig. 2, respectively, reduced by 1.5 and 2 times, increased by 8 and 16 times.

Figure 1. Graph of the logistic parameters of the energy intensity of diesel locomotives 3TE10M on the section Marokand - Kattakurgan, non-stop traffic

Figure 2. Graph of the logistic parameters of the energy intensity of diesel locomotives 3TE10M on the section Marokand - Kattakurgan, traffic with stops

An analysis of the results of the conducted studies, taking into account the data from [3, 4], leads to the following generalizing conclusions.

1. The values of the main logistic indicators of the transportation work of the above-mentioned 3TE10M diesel locomotives on the Marokand - Kattakurgan section of the Uzbek railway:

• the average estimated travel time of a freight train along hauls with stops at intermediate stations, separate points and sidings, and for acceleration - deceleration is 19.83 minutes and 1.35 and 1.78 minutes;
• the average estimated travel time of a freight train on hauls without stops at intermediate stations, separate points and sidings is approximately 17.15 minutes;
• the movement of freight trains without stops at sidings, intermediate stations and separate points, in comparison with their movement with stops at them, contributes to a decrease in the total (total) and specific consumption of full-scale diesel fuel, on average, by approximately 25.64 percent;
• the consumption of full-scale diesel fuel for one stop at an intermediate station, a separate point and sidings is 67.14 kg, and for one acceleration - deceleration, this consumption, on average, corresponds to 36.32 kg / stop.

2. The value of the reduced consumption of full-scale diesel fuel total (Е*, kg / km) and specific (е*, kg / 104 t km gross: km) for each stage of the hilly-mountainous section of Marokand - Kattakurgan is:

• on the stretch Marokand - Juma - 12.66 / 4.64 units - movement without stops and 12.843 / 4.707 units - movement with stops at intermediate stations, separate points and sidings;
• Juma - Nurbulak section - 4.984 / 0.582 and 7.900 / 0.923 units in the process of movement, respectively, without stops and with stops at intermediate stations, sidings and intermediate points;
• on the stretch Nurbulak - Kattakurgan - 5.492 / 0.757 units - movement without stops and 7.521 / 1.038 units - movement with stops at intermediate stations, sidings and separate points.

Thus, from the analysis and assessment of the complexity of the track profile of the railway section Marokand - Kattakurgan of the hilly-mountainous direction Samarkand - Navoi - Bukhara, it can be concluded that the Marokand - Juma section is difficult, and the other sections of Juma - Nurbulak and Nurbulak - Kattakurgan are relatively easy.

The results of the research should be used by machinists, instructors in heat engineering and specialists of the operation shop of the Bukhara locomotive depot. It is recommended: to develop measures to reduce the consumption of fuel and energy resources for train traction; make an assessment of the traction quality of the track profile on the section Samarkand - Navoi - Bukhara of the railway of Uzbekistan.

Reference:

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