摘要
采用有限元分析软件ANSYS建立干气密封补偿环O形橡胶密封圈二维轴对称模型,对其在不同压缩率与介质压力下的变形、Von Mises应力及密封面处接触压力、接触摩擦应力分布规律进行探讨,确定O性橡胶密封圈易失效位置;分析压缩率和介质压力对其最大Von Mises应力、最大接触压力、最大接触摩擦应力的影响.分析结果表明:O形圈密封最大Von Mises应力、密封面最大接触压力、最大接触摩擦应力随介质压力的增大而增大,在中低压下提高O形圈的压缩率既能提高密封圈的密封性能,也不影响补偿环的追随性.为干气密封补偿环上的O形密封圈结构设计及选型提供参考.
Two-dimensional axisymmetric model of rubber O-ring used in the dry gas seal with compensation ring was established by using finite element analysis software ANSYS, the distribution pattern of the deformation, Von Mises stress, contact pressure, and contact friction stress under different compressibility and medium pressure was explored, and the easy-to-fail position in the seal was determined. The influence of compressibility and medium pressure on the maximum Von Mises stress, maximum contact pressure, and the maximum contact friction stress was analyzed. The analysis result indicated that the maxima of Von Mises stress, contact pressure, and contact friction stress of O-ring would all increase with medium pressure. Increasing the compressibility of the O-ring under mid- and low-pressure could enhance its sealing performance and at the same time, would not affect the follow-up ability of the compensation ring. The investigation presented here will provide a reference for structural design and selection of O-ring seal for dry gas seal.
出处
《兰州理工大学学报》
CAS
北大核心
2016年第1期70-75,173,共6页
Journal of Lanzhou University of Technology
基金
国家自然科学基金(51165020)
甘肃省自然科学基金(145RJZA083)
