Some particularities of standard grooved rail turnout used on Romanian tramway networks

Abstract

The paper presents particularities of a standard grooved rail turnout used by Romanian tramway networks. Describe the construction and function of three major parts of turnout: a set of switches (switch tongue), common crossing, and closure rail. Highlight the phenomena of dragging bogie motor axle passing on the simple frog with shallow grooves. It calculates the highest crossing frog angle which does not require shallow grooves, in concordance with the wheel profile used by the Bucharest tramway network. For actual tramway synchrony rotation both axles single motor bogie designed, use of shallow grooves on frogs conduct to rapid wear of flange height of wheels and grooves of running parts of common crossing.