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前进型、建设型等蒸汽机车的131复式风泵,因损坏而造成机破和临修的事故比较突出。1978年,铁道部在兰州召开了专业会议,会上介绍了变向阀由分解式改为整体式的两项经验,即:采用专用机床,要求尾座顶尖中心与主轴中心的偏差不大于0.03毫米;采用专用铣刀。根据我段的实际情况,采用上述经验有较大困难。为了保证复式风泵变向阀室套和变向阀杆套的中心线偏差不大于0.03毫米,以提高风泵的质量,经过试验和研究,采用在C630车床主轴孔内安装找正工具和特制小型刀杆的方法,使变向阀室套和变向阀杆套一次加工成形。具体的找正和加工方法介
Progressive, construction-based steam locomotive 131 double pump, due to damage caused by machine break and temporary repair of the accident is more prominent. In 1978, the Ministry of Railways held a special meeting in Lanzhou. At the meeting, the two experiences of changing the directional valve from disassembly to integration were introduced. That is, using a special machine tool, the deviation between the center of the tailstock and the center of the spindle should not exceed 0.03 Mm; using a special cutter. According to the actual situation in my paragraph, it is more difficult to adopt the above experience. In order to ensure that the diversion pump valve chamber sleeve and the change to the centerline deviation stem sleeve is not more than 0.03 mm, in order to improve the quality of the wind pump, after the test and research, the use of tools in the C630 lathe spindle alignment tools and special Small knife method, the valve sleeve and the change to the valve stem sleeve forming a processing. Specific alignment and processing methods