Purpose: Development, testing methodology for the definition of energy expenditure on hydrostatic drive of cooling device motor fans of diesel locomotive TEP70BS. Energy expenditures on drive of cooling devices motor-fans constitute significant part in the total volume of energy expenditures for auxiliary needs. When determining diesel cooling device power, picked for motor-fan drive, it is necessary to take into account the influence of motor-fan drive technical condition and diesel cooling system general technical condition. The given task can be solved by the way of statistical analysis of the information, being registered by TEP70BS locomotive on-board diagnostics subsystem when performing corresponding analytical calculations. At the same, it is necessary to account for the peculiarities of functioning of motor-fan hydrostatic drive under various loading modes. Methods: Statistical processing and analysis of measurement results. Analytical calculation of a hydrostatic system on the basis of processing of measurement results. Reduction of hydrostatic drive parameters to non-nominal modes. Results: Methodology of energy expenditure analytical calculation on the basis of statistical analysis of data on motor fan operating modes is proposed. Probable values of power, spent on motor-fan drive for various controller positions, are determined. It is shown that for controller nominal position, average power consumption for being considered sample of five locomotives will constitute 23.2 kW per two fan motors. Practical importance: The use of the presented methodology allows to raise significantly the determination accuracy for power, being picked for auxiliary needs and, as a result, to increase calculation accuracy for traction characteristics and fuel consumption characteristics of TEP70BS diesel locomotive.
Purpose: To analyze the possibility of determining locomotive rectifier unit malfunction with the help of thermal fields and diode temperature measurement. Methods: There were applied the analysis of rectifier unit faults and their components for a certain period, modeling and thermal calculation in Solid Works Software Package. Results: The picture of thermal field and temperature changes at the diagnosis of regularly running diesel rectifier unit as well as at diode faults such as a breakdown and break. Practical significance: The possibility of monitoring the technical condition of a diesel locomotive rectifier unit when determining diode thermal fields as well as of determining possible malfunctions by diode temperature change is shown.
Objective: To examine the perspectives of using the titanium alloys for diesel motors design and for development of new construction materials for improvement of reliability and life time of forced diesels. Methods: Metallography and X-ray microanalysis were used for titanium allows examination. Results: It was found, that using of titanium allows for train diesel motor piston design would increase the elasticity of the piston for 8%, and decreases the elongation under high temperatures (up to 700 °С). Practical importance: Using of titanium alloys improves the reliability of piston operation and allows to increase the grade of forced induction, that provides the diesel power increasing.
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