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吉化公司化肥厂合成气车间有7台6WTB-142脱碳溶液循环泵。该泵轴最大直径4109mm,长度2m,转速2950rpm。油封采用骨架橡胶密封圈与泵轴组成磨擦副。由于泵轴材料较软,转速又比较高,更换一根新轴运转一个月后便开始漏油,经检查发现橡胶油封的唇部因磨擦过热而焦化变硬并产生裂纹,泵轴也磨出沟痕,只好更换油封并移动一个位置。运转一年左右由于漏油越来越严重,不得不中修换轴。而换下来的旧轴经检测,除油封处严重磨损外,其他精度还在技术要求之内,报废了感到很可惜,而且由于这种材料短缺,工厂备件很少。我们采用塑装四氯乙烯套的方法进行修复,具体做法是:
Jilin Chemical Fertilizer Plant Syngas Workshop has 7 units 6WTB-142 decarbonization solution circulating pump. The maximum diameter of the shaft 4109mm, length 2m, speed 2950rpm. Oil seal with skeleton rubber ring and pump shaft friction pair. As the pump shaft material is relatively soft, high speed, replacement of a new shaft after a month of operation began to leak, the inspection found that the rubber seal of the lips due to friction overheating and coking harden and crack, the pump shaft is also worn out Groove marks, had to change the seal and move a position. Operation for about a year due to more and more oil spills, had to replace the shaft. The replacement of the old shaft after testing, in addition to severe wear seal, the other accuracy is still within the technical requirements, scrapped feel very pity, but because of this shortage of materials, the factory spare parts rarely. We use plastic tetrachlorethylene sets of methods for repair, the specific approach is: