抄録
Severe wear of pantograph contact strips are caused by electric arc between contact strips and overhead wires. Arc-resistant contact strips for conventional rolling stocks were developed. They are made of sintered copper alloys. They contain hard metal such as Cr or Fe-Mo to improve wear resistance and MoS2 or Cu2S-FeS, in place of graphite, to improve arc resistance and lubricity.
New type lubricants for contact strips were developed to suppress wear of contact stirps and the overhead wires. They are made of wax containing graphite to improve eletcric conductivity.
New type contact strips made of carbon for conventional rolling stocks were developed to suppress wear of overhead wires. They contain metal to improve electric conductivity and mechanical properties. They are going to use widely in JR lines.
Wear of contact strips of the Shinkansen was investigated and it became evident that wear can be expressed by the function of velocity of the rolling stocks, collected current and material constants. It also became clear that electrical wear is more severe than mechanical wear.
New contact strips made of sintered iron alloys for the Shinkansen were developed. They contain hard metal such as Cr, Fe-W or Fe-Mo to improve wear resistance and MoS2 or impregnated low melting point metal to improve lubricity of them.
