철도차량용 제동디스크의 운행중 온도 변화 및 열전도도 측정 연구

초록

This study investigates the temperature change and thermal conductivity for the braking disc of the railway vehicle due to the types of train and service conditions. The temperature change was measured by non-contact Infrared thermometers. Average temperature was measured between 79.32℃ and 104.46℃ due to types of train and service section. In the same service section, the surface temperatures of Saemaul train were higher than Mugungwha train; the reason might have been the average service speed of Saemaul train (83㎞/h) was higher than Mugungwha train (107㎞/h), and the weight was similar 39t (Mugungwha) and 39.3t (Saemaul). But the maximum surface temperature was measured on the Mugungwha train; however the difference was not too big with the maximum temperature of Saemaul train. Also, the disc surface temperatures were changed due to the material of lining; metal and non-asbestos, on the same train and the same service section. In addition, the thermal conductivity was tested the thermal conductivities were increased by the increasing of the temperature. The change is too big between 100℃ and 200℃. But each average value is small, and the mechanical property change is very low. As a result, we conclude that this disc is suitable for usage between 100℃ and 300℃.

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