Analysis On Driving System Of High-Power Locomotive Based On Romax

As one of the essential components in a locomotive bogie, driving system is the core of high-power AC electric locomotive, its status determines the operating and traction performance of bogie. Since the traditional driving system has failed to meet the demands of high-power locomotives, new driving systems continue to emerge. In order to research the foreign advanced technology of high-power locomotive driving system deeply, structural performance of different driving systems was compared in this paper. Distinguished from domestic research focus on single parts primarily, the interaction of all parts was taken into account in the analysis of different driving systems in this thesis. Meanwhile, bearings and gears were simulated and analyzed. The research has great significance both in theory and engineering application.Firstly, this paper proceed from gear design by the conventional design method, according to the characteristics of gear in the symmetrical arrangement shaft, chose the main parameters such as module, tooth number, tooth width factor and spiral angle of the gear, and checked through the contact strength and bending strength. On this basis, through the analysis of bearing gear case, the minimum diameter of the pinion shaft was determined, furthermore, bearing type was selected and the adjusted rating life of bearings was calculated.Secondly, three driving system models were established in the use of RomaxDesigner software and locomotive driving system was simulated under the rated loading, and different structures of the driving system were discussed among the amount of bending deformation, bearing life, gear mesh. It is shown that, through compared two-terminal bracing structure to the simply supported bracing structure and cantilever bracing structure, the amount of bending deformation on the bearing of two-terminal bracing structure decreased by29.7%and20.5%, the bending deformation on the gear decreased by61.1%and49.8%; the bearing life is increased by23.5times and7.1times; tooth contact strength as well as tooth bending strength reduced by21.2%and34.1%in the premise of not considering the gear modification, and the stress distribute on tooth uniformly. At last, research to crown design for bearing rollers was carried out in this thesis. Due to heavy radial loads and the influence of motor speed regulation, it’s complex to decide the optimum crown value of the bearing roller. In order to improve the efficiency of crown design for bearing roller, the actual load spectrum of motor was introduced to achieve the law of different crown values and the ISO/TS16281adjusted bearing life. After that, the purpose is complicated by calculate interval of long bearing life as the interval of optimum crown valve. Finally, designed crown for the bearing in the two-terminal bracing structure was designed through this method and the optimum crown value of the bearing roller was decided, which prove the crown design method is feasible.