CALCULATION OF WIDTH MINIMUM TROUGH ON THE EQUILATERAL SWITCH AT POINT HEEL LENGTH IS MORE THAN THE SIZE OF VALVE LEAF IN THE RAILROAD SWITCH
Journal Title: Збірник наукових праць Українського державного університету залізничного транспорту - Year 2019, Vol 183, Issue 183
Abstract
In educational and reference literature very briefly presents data on the methodological calculations and design features of symmetric switches for different operational conditions, including for the mainline and industrial transport. This article summarizes some of the developments to remedy this drawback of textbooks. Equilateral switch is switch with all elements are arranged symmetrically relative to the axis of the main path. Equilateral switches are widely used in marshalling-yard bays stations, because they work in cramped conditions. Equilateral switch sometimes used when it is necessary to achieve higher speeds on both side of the track. For example, the symmetric transfer switch type R65 frog number 1/11 of the speed limit in the lateral direction 1,75 times greater than for an ordinary switch of the same brand and type. Equilateral switch or applied straight, or with curved blades. Straight tongue to main station track of industrial transport. On the main paths in symmetric switches used curved tongues. At design of symmetric railroad switches the condition of easy access of a crest of a wheel without pressing with a non-working part of a crest on a non-working side of the taken-away funnyman in a zone of the minimum trench between the funnyman and a frame rail and also in the funnyman's root has to be provided. To provide impossibility of pressing of wheels the size of the minimum trench between the taken-away funnyman and a frame rail has to be not less than 71 mm. The traffic safety of trains in a zone of the taken-away funnymen of symmetric railroad switches depends on the rational sizes of trenches between frame rails and the taken-away funnymen. The design of symmetric turnouts is significantly different from the design of conventional one-way translations. In this regard, special attention should be paid to the issues of the relative position of the laid wings and frame rails and the determination of the size of the gutters between them.
Authors and Affiliations
Olena Oliinyk, Olha Soroka
Keywords
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