Abstract
The article deals with the modelling of independently rotating wheels (IRW) systems for wagons. The research work of the intensity of rolling stock wheels rims and flanges is observed. The main performance objectives of IRW are to reduce winding of wheel‐sets, to enable railway rolling stocks to achieve higher speeds, to decrease wear of rail and wheel rolling surface, to improve the performance on railway curves and to reduce lateral displacement on rails. IRW with profiled tread are examined and the mathematical model of these IRW is created. Finally, the peculiarities of the stability and wearing characteristics of such IRW systems are presented.
Highlights
An ordinary wheel-set in which two wheels are mounted rigidly on an axle starts to wind at high speeds and causes instability and wear of both wheels and rail
Researchers are attempting to solve this problem by decoupling the wheels and making them rotate independent of each other a concept known as Independently Rotating Wheel System (IRW)
The performance objectives of rail wagons equipped with IRW are: the first, to reduce severe winding present in railway wagons with conventional wheels; this will enable the rail wagons to achieve higher speeds; the second, to reduce wear of rail and of the wheel tread and flange, as well as to lower energy dissipation; the third, to improve the performance in track curves by virtually eliminating longitudinal components of creep real; the last, to reduce lateral forces on rails
Summary
An ordinary wheel-set in which two wheels are mounted rigidly on an axle starts to wind (lateral oscillation) at high speeds and causes instability and wear of both wheels and rail. The main observations were the following: 1) lateral vibration in the car with IRW was less a reduction of 60 80 % on both straight and curved track; 2) sinuous motion is eliminated but there is a tendency for one of the wheel flanges to be in continuous contact with the side of the rail head; 3) no noticeable effect on wheel wear and power consumption compared with ordinary wheel-sets; 4) lateral thrust on rails is less, when negotiating sharp track curves
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