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Summary.To improve the working conditions of the electric locomotive running part, it is necessary to decrease unsprung masses, lateral loads and the angle of attack and provide the third body with proper tribotechnical properties. A new scheme of the freight electric locomotive running gear is elaborated in the work, which ensures a decrease of unsprung masses, relative sliding of a wheel on the rail and an angle of attack that provides resistance to the destruction of the third body in the contact zone. УЛУЧШЕНИЕ УСЛОВИЙ РАБОТЫ ХОДОВОЙ ЧАСТИ ГРУЗОВОГО ЛОКОМОТИВААннотация. Для улучшения условий работы ходовой части электровоза зону контакта колеса и рельса необходимо уменьшить необрессоренные массы, поперечные силы и угол атаки и обеспечить наличие третьего тела с необходимыми триботехническими свойствами. В работе приведена новая схема ходовой части грузового электровоза, которая позволяет уменьшить относительную скорость скольжения колеса по рельсу и угол атаки, что повышает устойчивость третьего тела к разрушению.

Vibratory transport and technological machines (VTTM) are widely used in the various spheres of the industry: for transportation of the friable and separate particles, their dosed supply, sorting and realization of various technological processes.One of the factors that has an influence on the process of vibratory transportation is elasticity of the working member bottom of a vibratory transportation and technologic machine.This problem is less studied in theory of vibratory transportation [1, 2].A system vibratory drive – rigid frame of the vibratory member – elastic bottom of the working member – friable load” is considered in the report and dynamical and mathematical models of their interaction are worked out.A systematic approach to the study of influence of the working member elastic bottom on the technologic process is used and some results of the research are presented.It has been established with the help of developed models that at coincidence of phases of vibrations of the working member frame and elastic bottom rigidly fastened to it a speed of transportation of the friable material (load) rises significantly. On the bases of the mentioned result a new construction is developed.

The reasons of occurrence of non-working fluctuations in the vibratory machine are considered. The mathematical model of movement of the loaded resonant vibratory feeder is worked out and by means of mathematical modelling is shown influence of spatial non-working fluctuations on the character of the vibratory movement of the material. It is shown, that the combination of some non-working fluctuations with working resonant fluctuations an increase of speed and intensity of movement of the material is reached which is a constructionally realizable problem.

The methods of estimation and prediction of tribological properties of the contact zone of interacting elements of machines are characterized by the low informativeness and accuracy that complicates provision of the proper tribological properties and hinders reliable and effective operation of machines. For obtaining more wide information about factors influencing tribological properties of the interacting surfaces, the experimental researches on the high speed (up to 70-m/s) and serial twin-disk machines were carried out. Our researches have shown that with different properties and degrees of destruction of the third body, the coefficient of friction can change up to 10 times or more, the wear rate up to 102-104 times, etc. This was the basis for a new concept of the mechanism of variation of tribological properties of interacting surfaces. The researches have shown a dependence of tribological properties of the contact zone on the properties and destruction degree of the third body that was assumed as a basis of new concept of the mechanism of variation of tribological properties of these surfaces. The monitoring of the third body destruction onset and development was carried out in the laboratory conditions and a criterion of the third body destruction was developed. The reasons of the negative, neutral and positive friction and mild, severe and catastrophic wear are shown.