A variable friction centre plate

Determination of the Filler Concentration of the Composite Tape

“…The obtained dependence (11) characterizes the filler distribution of the filler concentration of the composite tape on the diameter of the CBRTB, taking into account the physical and mechanical properties of the center plate of the body and the properties of the composite tape. Now, it is necessary to set the initial value of the filler concentration C F0 .…”

“…The theoretical distribution of the filler in the composite tape (expression (11)) along the length of the cylindrical surface of the CBRTB in function of the rotation angle is shown in Figure 3. It should be noted that for every π/4 in expression (11), the sign under the exponent changes to its opposite.…”

“…This is due to the increase in the speed of the trains, which leads to an uneven increase in the loads on the freight car bogie. The analysis of the operating conditions and operating results of a freight car bogie made of 20GL, 20FL, and 20GFL low-alloy steels, belonging to the ferrite and perlite class, showed [9][10][11][12] that these parts during operation under dry friction conditions and the presence of high contact and impact loads have low wear resistance with an intensity of wear of working surfaces equal to 1.2-2.0 mm per 100,000 km of mileage. The use of low-carbon and low-alloy welding materials for CBRTB repair provides a repair mileage of only 160 thousand km, which corresponds to 2 years of operation [13,14].…”

“…The experience of using the central bowl surface of the rail truck bolster and the installation of wear-resistant elements on them showed [11,14,15] that there is no universal, effective, and reliable protection against wear during friction. The presence of shock loads in the contact zone of the bolster parts did not allow the use of materials of high rigidity, which are characterized by increased fragility.…”