石墨填料环力学和密封性能试验研究

发布时间：2018-03-03 16:07

本文选题：柔性石墨　切入点：填料环　出处：《润滑与密封》2016年11期 　论文类型：期刊论文

【摘要】：试验研究不同密度的石墨填料环的轴向力传递特性和压缩回弹性能;结合有限元数值模拟,研究不同密度的石墨填料环的侧压系数;通过试验研究不同密度的双层石墨填料环的密封特性。结果表明:侧压系数随着加载轴向力的增加而增加,密度对侧压系数的影响不明显;轴向力传递率随石墨填料环的密度增大而增大;石墨填料环的压缩率随着密度的增大而减小,回弹率随密度的增大而增大;不同密度的双层石墨填料环在目标轴向压力40 MPa下的泄漏率均低于设定值(1.0×10~(-6)Pa·m~3/s),密度对泄漏率没有明显的影响。
[Abstract]:The axial force transfer characteristics and compression resilience of graphite packing rings with different densities were studied, and the lateral pressure coefficients of graphite packing rings with different densities were studied by finite element numerical simulation. The sealing characteristics of double-layer graphite packing ring with different densities are studied. The results show that the lateral pressure coefficient increases with the increase of axial force, but the influence of density on the lateral pressure coefficient is not obvious. The axial force transfer rate increases with the increase of the density of the graphite packing ring, the compression ratio of the graphite packing ring decreases with the increase of the density, and the rebound rate increases with the increase of the density. The leakage rate of the double-layer graphite packing ring with different densities at the target axial pressure of 40 MPa is lower than that of the set value of 1.0 脳 10 ~ (-6) Pa 路mg ~ (3 / s), and the density has no obvious effect on the leakage rate.
【作者单位】：华东理工大学机械与动力工程学院;上海核工程研究设计院;宁波天生密封件有限公司;
【基金】：国家自然科学基金项目(51275171)
【分类号】：TH136

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