Abstract
The increase in heavy freight traffic in recent years is fueled by an increase in demand for coal as an alternative energy resource of oil, and also steel, in the manufacture of which large quantities of iron ore are required. However, in the former Soviet Union, the use of heavy freight trains was complicated due to insufficient quality of the railway. In this regard, the article considers the features of construction truck wagons of models 12-9941 produced by LLP Kazakhstan car-building according to the project of Qiqihar railway company (PRC). The laboratory testing of rolling stock conducted in Dnipropetrovsk national University of railway transport has identified the main dynamic characteristics that meet the requirements of the international standard. The use of gondola wagons of model 12-9941 in the organization of the heavy traffic creates tensions in the construction of the permanent way, which do not exceed the permissible limits in both straight and curve track sections. DOI: http://dx.doi.org/10.5755/j01.mech.24.1.17710
Highlights
The use of heavy freight trains will reduce the fleet of electric locomotives for a specified turnover and increase throughput plots [4,5,6]
In several foreign countries, including the USA and Canada the use of heavy freight trains is reduced operating costs due to the reduction of locomotive brigades, which reduced the price of the carriage of goods [1, 6, 7]
The most promising to enter the heavy freight traffic in Kazakhstan are the areas of delivery of coal from Ekibastuz routes Ekibastuz - Petropavlovsk; Ekibastuz - Karaganda; Ekibastuz - Zolotaya Sopka (Russian Federation)
Summary
The introduction of heavy freight trains is a complex task, associated with the use of more powerful locomotives, higher axle loads, reconstruction of road infrastructure and electricity supply, improvement of technology of transportation process [1,2,3]. The most promising to enter the heavy freight traffic in Kazakhstan are the areas of delivery of coal from Ekibastuz routes Ekibastuz - Petropavlovsk; Ekibastuz - Karaganda; Ekibastuz - Zolotaya Sopka (Russian Federation) In implementing this strategy, the Company seeks to raise the average weight of trains by 30%. With the 60-ies of XX century in the United States, Canada, Australia and other countries produced four-axle wagons with a capacity of 90 tons (axial load of about 294 kN) and exploiting the car Park with loads of up to 340 kN in trains weighing 12 – 20 thousand tons. The fractures are more often seen on the side frames of the trucks that were in operation three years or less, which indicates poor quality of their manufacture, do not provide guaranteed lifetime [12]
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