디스크 질량 변화에 따른 철도차량용 제동디스크의 마찰 특성
Influence of Disk Mass with regard to Frictional Characteristics of Brake Disk for Rolling Stock
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초록
Low alloy heat resistant brake disk and sintered brake pad are applied to mechanical brake systemfor the speed-up of urban rapid transit. In this research, we analyzed how the frictional characteristics betweenbrake disk and pad are influenced by the disk mass. At a high disk mass, the friction stability was the lower valueas a result of the lack of tribofilm formation at the disk surface. Wear rates of friction materials showed the highervalue at a low disk mass and wear rates of 10 mm and 15 mm showed the similar level. Average friction coefficientwas the lower value at the 10 mm disk thickness and range of variation of average friction coefficient was also thesmaller value at the 10 mm disk thickness. However, there were no significant changes in the friction coefficientsunder any of test conditions. Surface roughness of a disk showed the highest value at the 5 mm disk and surfaceroughnesses of 10 mm and 15 mm showed the similar level. As a result, friction characteristics of disk mass influencedthe friction stability, as well as the wear rate of friction pad and disk, but not the friction coefficient.
Abstract
Low alloy heat resistant brake disk and sintered brake pad are applied to mechanical brake systemfor the speed-up of urban rapid transit. In this research, we analyzed how the frictional characteristics betweenbrake disk and pad are influenced by the disk mass. At a high disk mass, the friction stability was the lower valueas a result of the lack of tribofilm formation at the disk surface. Wear rates of friction materials showed the highervalue at a low disk mass and wear rates of 10 mm and 15 mm showed the similar level. Average friction coefficientwas the lower value at the 10 mm disk thickness and range of variation of average friction coefficient was also thesmaller value at the 10 mm disk thickness. However, there were no significant changes in the friction coefficientsunder any of test conditions. Surface roughness of a disk showed the highest value at the 5 mm disk and surfaceroughnesses of 10 mm and 15 mm showed the similar level. As a result, friction characteristics of disk mass influencedthe friction stability, as well as the wear rate of friction pad and disk, but not the friction coefficient.
참고문헌 (8)
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