Double locomotive in series was the common traction mode in heavy haul transportation, it brings people with the high efficiency and convenient of the transportation. But with the increase of the train running speed and the traction load, the running safety problem of the train especially the locomotives during the dynamic braking case turn more and more serious. The coupler will suffered by the longitudinal press force if the dynamic brake (electricity brake) mode was adopted. The coupler will occurred deflection for the existing of the coupler free rotation angle, this will leads to the car body suffered by a lateral force at the position of the coupler pin. The wheel set derailment will happen if the longitudinal press force on the coupler was bigger enough. The principle of the coupler stability with the longitudinal press force on the coupler was researched to solve the problem of derailment during the dynamic brake of the heavy haul locomotive. Take the SS3B locomotive and No. 13 coupler for example, set up the dynamic model of the four locomotives in series draught 3000t freight train to research the coupler stability of the locomotive which under the longitudinal press forces of the coupler; and the coupler stability of the locomotive on the long ramp track with the grade of 30%o was researched. The position stop was used to restrict the free rotation angle of the coupler with respect to the coupler rear frame on No. 13 coupler. There is not enough damp cushion during the course of the coupler rotation till it reached the stop, it will lead the wheel set lateral force and the derailment coefficient has a big peak value when there is a longitudinal press force on the coupler, but the continuance value of the wheel set lateral force and the derailment coefficient were lower than the corresponding safety restrict value. The phenomenon can be reappearance by the dynamic simulation. The biggest longitudinal press force on the coupler which the SS3B locomotive with the No. 13 coupler can be afforded was about HOOkN on the big long ramp track with the grade of 30%o. And pointed out that the wheel partial abrade has a big relation with the coupler longitudinal press force. The wheel flange abrades will increased significantly if the coupler re-position moment was not enough.
A study of locomotive dynamic performance with the longitudinal press force on coupler
2009
6 Seiten, 10 Bilder, 1 Tabelle, 5 Quellen
Conference paper
English
British Library Conference Proceedings | 2009
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