Since the required diamond resistance of the bogie can be obtained through the optimized design of the friction wedge and the wedge spring, the heavy-duty vehicle can ensure that the three-piece bogie has sufficient torque and control resistance by means of the oblique wedge device. The ability to float and roll side resonance. In contrast, most conventional three-piece bogies do not have enough resistance to maintain their stability even when they are new.
The new optimized three-piece bogie has many advantages over conventional bogies equipped with cross-support and radial devices. First, it has the same maintenance cost as a conventional bogie, but its performance is as good as that of a cross-support bogie. At the same time, since it does not have cross braces, shear-resistance contact beams and any other connection devices, the stiffness of the lining can be guaranteed. Therefore, the quality is as light as the traditional three-piece bogie.
Due to its high enough shear stiffness between shafts, it can use shear rubber pads on bogies like cross-braced bogies. Finally, because the optimized three-piece bogies maintain a high resistance to rock stiffness and a reasonable position of the wheelset on the curve, it can maintain stable operation with a maximum operating speed of 128km/h, Wheel and rail wear is greatly reduced, especially in reducing the peeling of wheel treads, which will result in an average double life of the wheelset, and its benefits are significant.
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