Articles published in the issue 08, 2021

Improving the maintenance of the track infrastructure

Keywords: technological «window»; «blind window»; track maintenance; near-field system; precinct system; standard train schedule.

Kovalenko Nikolay — D.Sci., professor of the Department «Track and Track Facility», Russian University of Transport (MIIT). Moscow, Russia. E-mail: kni50@mail.ru

Buchkin Vitaly — D.Sci., professor of the Department «Design and Construction of Railways», Russian University of Transport (MIIT). Moscow, Russia. E-mail: buchkin@mail.ru

Bykov Yuri — D.Sci., associate of the Department «Design and Construction of Railways», Russian University of Transport (MIIT). Moscow, Russia. E-mail: uabykov@mail.ru

Abstract. The precinct method of servicing the infrastructure of the track complex provides for the widespread use of mechanized methods, in which a one-time closure of train traffic is necessary. However, the features of this method cannot be implemented with the same parameters of technological «windows» as with a near-current system. An increase in the duration of the technological «window» by 30-35% will increase labor productivity and the production of mechanized complexes by 1.6–1.7 times. Even greater efficiency can be achieved by providing «blind windows», which are widely used in a number of foreign countries.

Optimization of lubricant consumption in the wheel-rail friction system

Keywords: path of the slide, angle of nabahani, angle of inclination of the ridge regression equation, method of Box-Wilkson, rail track infrastructure, rail lubrication, stationary rail lubricators, mobile rail lubrication systems.

Volov Vyacheslav — D.Sci., Professor, Samara state University of Railways. Samara, Russia. E-mail: vtvolov@mail.ru

Bondarenko Alexey — D.Sci., Professor, Non-state Private educational institution of Additional professional education Training Center INFOTRANS. Samara, Russia. E-mail: bondarenko@infotrans-logistic.ru

Bondarenko Timofey — deputy director of Non-state Private educational institution of Additional professional education Training Center INFOTRANS. Samara, Russia. E-mail: t_bondarenko@infotrans-logistic.ru

Matiushkova Lyubov — senior lecturer Samara state University of Railways. Samara, Russia. E-mail: mli55@mail.ru

Shchennikova Tatyana — senior lechturer,Samara state University of Railways. Samara, Russia. E-mail: tvs153@mail.ru

Abstract. The article discusses organization of rail lubrication on Russian Railways network using a number of innovative solutions that were implemented in recent years. Technical and economic calculations of reduced operational costs due to implemented innovations are shown in the article. Technical specifications of modernized SPR — type rail lubricators are also shown. The article introduces the concept of stationary lubricators maintenance on a lifecycle contract basis.

The article presents results of the study of minimizing the consumption of lubricants in the «wheel-rail» system. Based on the application of the theory of planning experiment, the numerical simulation of the circular slip path depending on the wheel radius, the difference between the radius of the contact circles of the crest and the wheel rim with the rail head, the angle of the ridge and the angle of run. As a result of the steep ascent by the Boxing-Wilkson method, the geometric parameters of the wheel-rail system are obtained, which allow to reduce the circular slip path by 30%. These results make it possible to significantly reduce the number of relevant field studies and the consumption of materials for lubrication in the «wheel-rail» system.