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螺纹联结,在蒸汽机车中应用很广。由于“四人帮”的干扰,过去一段对机械加工质量要求不严,生产的零件光洁度低,精度较差,配合不当,安装到机车上在运行中经常出现松动现象。为防止松动在构造上曾采取了一些措施,如增加弹簧垫圈、防缓螺母、开口销等。但由于机车在运行中的振动,也还会出现开口肖剪断、螺母脱落的现象。尽管机车乘务员日常敲螺检纹联结部件的松动,以防隐患,但有时也会造成机车临修或机破事故。
Thread connection, widely used in steam locomotives. Due to the interference of the “gang of four”, the past period was not strict in terms of the quality of machining. The finished parts produced had low surface finish, poor accuracy and improper coordination. They were often loosened during operation on locomotives. In order to prevent loosening in the structure has taken some measures, such as the increase of spring washers, anti-slow nut, cotter and so on. However, due to the vibration of the locomotive running, there will also be an opening Xiao cut, the nut off phenomenon. Although locomotive flight attendants routinely screw thread check loose parts, to prevent hidden dangers, but sometimes also caused locomotive temporary repair or machine broken accident.