石墨填料环力学和密封性能试验研究  

Study on Mechanical and Sealing Performance of Flexible Graphite Packing Rings

作　　者：肖光凯 章兰珠[1] 王夫清[1] 龚碧颖[2] 许辉焱[2] 励行根 励勇 杭建伟 蔡仁良[1] 

机构地区：[1]华东理工大学机械与动力工程学院,上海200237 [2]上海核工程研究设计院,上海200233 [3]宁波天生密封件有限公司,浙江慈溪315302

出　　处：《润滑与密封》2016年第11期10-14,64,共6页Lubrication Engineering

基　　金：国家自然科学基金项目(51275171)

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。The axial force transfer and compression-resilience characteristics of graphite packing rings with different density were studied using experimental method. Combined with the finite element numerical simulation, the lateral pressure coefficient of graphite packing rings with different density was investigated, and the sealing performance of double layer graphite packing rings with different density was studied using experimental method.The results show that lateral pressure coefficient is increased with the increasing of axial force.The influence of graphite packing density on the lateral pressure coefficient is not obvious.The axial force transfer rate is increased with the increasing of graphite packing ring density.Corn- pression rate is decreased with the increasing of graphite increasing of graphite packing ring density. The leakage packing ring density, and the resilient rate is increased with the rate of double layer graphite packing rings with different density under the target axial pressure of 40 MPa is less than the set value （ 1.0×10^（-6） Pa· m3/s） ,the density of packing ring has no obvious influence on sealing performance.

关 键 词：柔性石墨 填料环 密封 侧压系数 轴向力 

分 类 号：TB42[一般工业技术]