The issue of improving of the design of a railway wheelset

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The article analyses one of the significant drawbacks of traditional wheelsets of rail vehicles, which consists in the occurrence of elastic deformations of bending of its axis in operation. It has been established that this is due to the irrational scheme of transferring vertical loads from the topsides of the rail vehicle. The magnitudes of these angles determine the additional (elastic or plastic) displacements of the points of the contact of wheels with the rails transversely of the rail gauge when the wheelset is subjected to the static and dynamic loads during the movement. A possible way to eliminate this disadvantage of the traditional wheel pair is to change the loading scheme of its wheels with vertical loads. This is possible to perform by changing the traditional design of a wheelset and abandoning its traditional axis using independently rotating wheels (IRW). The use of wheel pairs with IRW eliminates another significant disadvantage of traditional wheelsets. It is associated with high torsion stiffness of the axles of such structures, which does not allow the wheels to rotate relatively to each other. This causes increasing of wheel slip on rails when moving in curved sections of the track and it also limits the speed of steady movement of rail vehicles in straight tracks. However, when using wheel pairs with the IRW, they are not centred in the rail gauge. At the same time there is long contacting of a flange of one of the wheels on the rail with a high level of wear. Improving the dynamics of rail vehicles with IRW and reducing wear of wheels and rails is possible by means of mechatronic systems to control the position of wheelsets in the track gauge.
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The issue of improving of the design of a railway wheelset / E. Mikhailov, S. Semenov, J. Dižo, M. Blatnický, S. Kliuiev, M. Kovtanets // Proceedings of 24th International Scientific Conference. Transport Means 2020, September 30 - October 02, Kaunas, Lithuania. – 2020. – P. 327-332.