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我段原配属东风_4型内燃机车34台,东风_2型内燃机车4台,运用中因电空阀线圈的烧损,曾多次造成机破和临修事故,影响了机车的正常使用。造成电空阀线圈烧损的原因是多方面的,但解剖分析表明,80％～90％是因线圈两端过电压击穿造成的。为了提高机车运用的可靠性,抑制峰值较高的系统操作过电压,我段14台东风_4型内燃机车的四类电空阀线圈采用了并联氧化锌压敏电阻的方案。现将4年多来压敏电阻的使用情况和跟踪检测结果作一简要介
I originally belonged to Dongfeng _4 type diesel locomotive 34, Dongfeng _2 type diesel locomotive 4, the use of electric air valve coil burning, has repeatedly caused the machine broken and temporary repair accident, affecting the normal use of the locomotive. There are many reasons for the burn-in of the solenoid valve. However, anatomical analysis shows that 80% -90% are caused by over-voltage breakdown at both ends of the coil. In order to improve the reliability of the locomotive operation and suppress the system over-voltage with high peak value, four types of electro-pneumatic valve coils of 14 Dongfeng-4 diesel locomotives adopted a scheme of parallel zinc oxide varistors. More than 4 years now varistor use and tracking test results for a brief introduction