文章摘要
吕成龙,何立东,胡 朋.大型三相异步电动机轴端密封的改进设计[J].润滑与密封,2014,39(5):121-124
大型三相异步电动机轴端密封的改进设计
  
DOI:10.3969/j.issn.0254-0150.2014.05.024
中文关键词: 电动机  漏油  密封结构
英文关键词: motor  oil spill  seal structure
基金项目:国家973计划项目(2012CB026000);北京市教育委员会共建项目专项与博士点基金项目(20110010110009).
作者单位E-mail
吕成龙 北京化工大学化工安全教育部工程研究中心 lvchenglongsky@126.com 
何立东 北京化工大学化工安全教育部工程研究中心  
胡 朋 北京化工大学化工安全教育部工程研究中心  
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中文摘要:
      分析某石化公司大型三相异步电动机漏油的原因,指出电动机外漏的原因为油封内的压力高于外界压力,内漏的原因为内风扇转动时在轴承处产生局部负压,使油封内的压力大于机腔内的压力。针对电动机存在的密封环磨损问题,设计可调式自动跟踪密封环,并根据密封试验中出现的密封环断裂问题,提出用石墨填充聚四氟乙烯密封环代替石墨密封环。实际工程应用结果表明,可调式自动跟踪密封环很好地解决了电动机轴承油封漏油问题。
英文摘要:
      The oil-leaking's reasons of a large three phase asynchronous motor in a petrochemical were analyzed.The reason of external leakage is that the pressure in the seal is higher than that of the outside pressure.There is a negative pressure exists near the bearing,which results in that the pressure in the seal is higher than that in the cavity.According to the seal ring wear of motor,an automatic adjustable seal ring was designed.The graphite sealing ring is replaced by the sealing ring made of graphite filled PTEE for the graphite sealing ring is easy to be broken in the seal test.The actual application result shows that the oil spill of the motors bearing seal is resolved by using the automatic adjustable seal ring.
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