Analysis of the Wheel/rail Adhesion Characteristic using the Scaled Adhesion Tester

초록

Railway vehicles driven by wheels obtain force required to propulsion and braking by adhesion force between wheels and rails, this adhesion force is determined by multiplying adhesion coefficient of the friction surface by the applied axle load. In railway system, the adhesion coefficient is usually defined as the maximum traction/braking coefficient. To obtain the adhesion coefficient of the maximum traction/braking coefficient, it is necessary to determine the values primarily wheel load and the friction coefficient on contact point. Scaled adhesion test-bench is an experimental device that contacts mutually with disc rollers that are equivalent to wheels and rails of railway vehicles, and rotates mutually by friction by driving each motor connected with roller axes. In this paper, a scaled adhesion tester was developed in the twin disc type to verify the measuring performance of the tester. Test procedure is following