ESTABLISHMENT OF STANDARDS SWITCH’S WEAR-RESISTANGE FOR OPERATING CONDITIONS IN KIEV UNDERGROUND
Journal Title: Збірник наукових праць Українського державного університету залізничного транспорту - Year 2018, Vol 178, Issue 12
Abstract
This research is devoted to the solution of a difficult task which concerns justification and establishment of rational rationing of size of the missed tonnage on metal elements of railroad switches depending on wear size, defines operability of separate elements and a design in general. The specified norm directly has functional communication with complex characteristics which consider design features (type, brand, a type of the subrail basis) and operational conditions on sites of a way (freight density, the missed tonnage, speed of the movement, axial loadings, the primary direction of train service, etc.). As railroad switches work in more difficult service conditions, have more difficult constructive registration, the increased power interaction, the wear of their separate elements has differences in the course of formation from a usual track and demands individual consideration. The worn most out by elements of railroad switches is crosspieces and shooters depend on their state admissible speeds of train service. Therefore the conducted researches provided establishment of standard service life of the specified elements. Results of complex operational researches on establishment of standard service life of R65 and R50 railroad switches on the basis of characteristics of wear resistance of the basic metal elements of the translations for service conditions on the main ways of the Kiev subway are presented. Theoretical calculations the special technique which is developed by professor E.I. Danilenko has been assumed as a basis, it has well proved for establishment of the corresponding standards on the main railroads. In the specified technique service conditions of a design are considered by the complex characteristic of power loading of a way, considers not only the major factors influencing wear, but also additional parameters: sizes and a range of the passed wheel loadings, diameters of wheels of the rolling stock, size of additional dynamic forces from roughnesses on the surface of driving of a rail and time of action of dynamic force. Results of the conducted researches have allowed to establish reasonably standards of service life of the translations for various constructive registration and various service conditions of the subway on the basis of forecasting of wear of metal elements of railroad switches.
Authors and Affiliations
Volodymyr Boiko, Vitalii Molchanov, Olha Soroka
Keywords
Related Articles
- EP ID EP381171
- DOI 10.18664/1994-7852. 178.2018.138922
- Views 63
- Downloads 0
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