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2013年兰州机车公司与GE公司合作检修NJ2型内燃机车转向架,针对检修过程中车轮压装问题进行了梳理、论证、总结,经过现场分析探讨和反复试验,通过改进车轮毂孔加工工艺、合理控制压装速度和压力值、正确选用并涂抹润滑剂等措施,制订出一套技术先进、可靠实用的机车车轮无注油压装工艺,实现了NJ2型内燃机车车轮与车轴的无注油压装。
In 2013, Lanzhou Locomotive Company cooperated with GE Company to repair NJ2 diesel locomotive bogie, combed the wheel press-fitting problems in the overhauling process, demonstrated and summarized, through the field analysis and trial and error, through the improvement of wheel hub hole processing technology, reasonable Control the loading speed and pressure value, the correct selection and application of lubricant and other measures to formulate a set of advanced technology, reliable and practical locomotive wheel without oil pressure loading technology to achieve the NJ2 diesel locomotive wheel and axle without injection pressure Loaded