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1 现状与动态 我国内燃机车从上世纪50年代发展至今,机车主电路中的执行元件一直是电空式器件,原因是该类器件动力特性好,即作用力大,有效行程长,能满足机车主电路对大功率电器的控制要求。然而,多年的行车实践,人们也认识到了这类器件的不足之处,即环境适应性较差,故障率
1 Status quo and dynamics Since the development of diesel locomotives in our country from the 1950s to the present, the actuators in the main circuit of the locomotive have been electropneumatic devices because the dynamic characteristics of these devices are good, that is, the force is large, the effective stroke is long, The main circuit of the high-power electrical control requirements. However, many years of driving practice, people also recognize the shortcomings of such devices, that is, poor environmental adaptability, failure rate