Кафедра "Хімія та інженерна екологія" (з 2022 увійшла до складу кафедри Екологічна та цивільна безпека ДІІТ)

Permanent URI for this communityhttp://crust.ust.edu.ua/handle/123456789/689

ENG: Department "Chemistry and Environmental Engineering"

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The Assessment of Negative Impact of Oil Products on Railroad Track and Rolling Stock Constructions
(Kaunas Univ. of Technology, Lithuania, 2019) Zelenko, Yuliya V.; Lunys, O.; Neduzha, Larysa O.; Steišūnas, S.
EN: Abstract In order to ensure the reliability of metal elements in structures of railway infrastructure, the influence of solutions is investigated that contain oil products on the degree of corrosive changes of steels of grade 3, 5, RSt37-2, 09G2D and grey cast iron 21-40. On the basis of experimental data that were obtained using R-5126 polarization resistance indicator, potentiostat P-5827 mathematical relations of the influence of various fractions of oil products on the rate of metal corrosion are introduced. The obtained data can be used for non-destructive control of basic elements of structures, the choice of effective inhibitors for reducing the corrosive aggressiveness of the environment and the protection of structural elements.
Contemporary Principles for Solving the Problem in Noise Reduction from Railway Rolling Stock
(IOP Publishing, 2020) Zelenko, Yuliia V.; Zelenko, Dariia; Neduzha, Larysa O.
EN: The statistical and monitoring data confirm the significant impact of the operational mode on the most important noise and vibration parameters, which is relevant for ensuring the efficiency and quality of the operational process with regard to ergonomic and environmental requirements. The article analyzes the acoustic parameters of rolling stock of the railway, emphasizes the peculiarities of noise emission from various elements of rolling stock and a track. Existing approaches towards solving the problem in the organization of railway noise control are outlined. On the basis of existing modern methods for measurement and analysis of acoustic parameters, the authors propose conceptual approaches toward monitoring the acoustic parameters, predicting noise characteristics and constructing the noise maps of railways. The algorithm of the developed acoustic model for the operational monitoring of noise load and the possibility to compile a case of noise maps for Ukrzaliznytsia is presented. The proposed algorithm allows at given basic design parameters and speed of rolling stock, known sound-absorbing and dissipative characteristics of all elements to carry out a rational selection of noise-protective measures in accordance with the sanitary noise regulations for a specific receptive facility.
Enhancement of Operational Reliability of Elements in the Diesel Engine Cooling System of Locomotives
(Kaunas Univ. of Technology, Lithuania, 2020) Zelenko, Yuliia V.; Keršys, A.; Neduzha, Larysa O.
EN: Operating experience of diesel locomotives on railways shows that the use of insufficiently purified water results in the destruction of water cooling systems. This problem is especially acute for areas with increased hardness and mineralization of natural waters. The impact of the water demineralization degree on the corrosion rate of elements in diesel engine cooling systems of locomotives has been researched. The dependence of the corrosion rate for various metals on the degree and depth of desalination and the cooling liquid temperature is proved. Recommendations on optimizing the technology of cation treatment for cooling liquids ensuring the efficiency and durability in the operation of diesel engines of locomotives were developed.
The Impact of Motor Oils Quality on Improving the Reliability in Operation of Traction Rolling Stock
(Kaunas Univ. of Technology, Lithuania, 2020) Zelenko, Yuliia V.; Bezovska, Maryna S.; Skvireckas, R.; Neduzha, Larysa O.
EN: In modern operating conditions of rolling stock, railway safety is one of the priority issues. The safe operation of traction rolling stock is impossible without the effective use of all its components. One of the main characteristics of rolling stock is the reliability, the level of which is associated with the efficiency of its operation. The reliability is closely related to such an important issue as the environmental safety in operating of a railway vehicle. Domestic and world experience in operating autonomous locomotives indicates that diesel power plants play a decisive role in this. An important part of diesel engine in a locomotive is the oil system. The annual formation of a significant amount of used oils requires solving the problem of their further safe storage. The article considers the impact of motor oils quality on the reliability in operation of traction rolling stock. In this connection, a new method in recovering of used oils of different marks and returning them to the production process is proposed. This will contribute to increasing the safety in operation of railway equipment on the railways, improved economic performance, minimizing the amount of waste and their negative effect on the environment and so on.