旋转轴唇形密封接触分析

发布时间：2019-03-08 15:50

【摘要】：针对旋转轴唇形密封在实际使用与装配过程中因存在加工误差与装配误差导致的密封唇与旋转轴贴合不紧密的问题,提出了1种带副唇的旋转轴唇形密封接触分析模型。该模型主要研究装配后密封与旋转轴的接触情况,并采用Mooney-Rivlin模型处理密封圈橡胶的应力应变关系。通过有限元分析软件对模型进行了计算,分析了该型密封圈装配后的不同压缩量情况下密封与旋转轴的接触应力。研究结果表明,随着压缩量的增大,密封圈主唇接触应力随之增大,当压缩量达到0.7mm时副唇与旋转轴接触,达到阻止外部灰尘进入的理想工作状态,继续增大压缩量时,主唇接触应力随压缩量的增加幅度有所减缓。因此使用此种密封圈时应保证装配后密封圈的压缩量在0.7mm以上。
[Abstract]:In order to solve the problem that the sealing lip does not fit closely with the rotary shaft due to machining errors and assembly errors in the actual use and assembly of the rotary shaft lip seal, a contact analysis model of the rotary shaft lip seal with auxiliary lip is presented. This model mainly studies the contact between seal and rotating shaft after assembly, and uses Mooney-Rivlin model to deal with the stress-strain relationship of seal ring rubber. The model is calculated by the finite element analysis software, and the contact stress between the seal and the rotating shaft is analyzed under the condition of different compression amount after the sealing ring is assembled. The results show that the contact stress of the main lip of the seal ring increases with the increase of the compression amount. When the compression amount reaches 0.7mm, the secondary lip contacts with the rotation axis, and the ideal working state of preventing the external dust from entering is achieved, and when the compression amount continues to increase, the contact stress of the main lip of the seal ring increases. The contact stress of the main lip decreases with the increase of compression. Therefore, the sealing ring shall be used to ensure that the compression amount of the sealing ring after assembly is more than 0.7mm.
【作者单位】：长江大学机械工程学院;湖北省油气钻完井工具工程技术研究中心;中国石油大学(北京)机械与储运工程学院;
【基金】：国家自然科学基金资助项目(51275057) 长江大学非常规油气湖北省协同创新基金资助项目(HBUOG20147) 湖北省自然科学基金创新群体资助项目(2012FFA033)
【分类号】：TH136

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