Controlling the friction between wheel and rail is a direct and very effective measure to improve the curving performances of bogie trucks, because the curving performances of bogie truck depend much on friction characteristics. Authors have proposed a method, 'friction control', which utilizes friction modifier (KELTRACK HPF) with onboard spraying system. With the method, not only the friction coefficient, but also the friction characteristics can be controlled as expected. In this paper, results of fundamental experiments are reported which play an important role in the realization of the new method. The conclusions of the tests introduced in this paper are the followings: ( 1 ) The effectiveness on curving performance of friction modifier sprayed to the top of low rail was confirmed by the tests with 1/10-scaled model vehicle tests. ( 2 ) The phenomenon was recognized in model tests with 1/10-scaled model vehicle or two roller rig machine that the effects of friction modifier is decreased with the number of wheel/rail contacts observed in tests with commercial train. (3 ) With the results of 1/10-scaled model vehicle tests, a possibility was indicated that differences of rotations could be a parameter of the friction control. ( 4 ) With the results of tests with two-roller-rig machine, the creep characteristics with friction modifier can be controlled by the amount of spraying. ( 5 ) With the results of tests with two-roller-rig machine, friction condition of certain curve in actual railway could be controlled to the one expected by handling the interval of spraying.
A method to apply friction modifier in railway system
Anwendung eines Reibungsmodifikators in einem Eisenbahnsystem
2004
6 Seiten, 17 Bilder, 2 Tabellen, 2 Quellen
Aufsatz (Konferenz)
Englisch
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