力载荷下分瓣式碳环密封结构变形研究  

Research on Deformation of Split Type Carbon Ring Seal Structure under Force Load

作　　者：李璐 丁雪兴[1] 王蕊霞 徐洁 洪先志 包鑫 LI Lu;DING Xuexing;WANG Ruixia;XU Jie;HONG Xianzhi;BAO Xin(College of Petrochemical Engineering,Lanzhou University of Technology,Lanzhou Gansu 730050,China;Chengdu Yitong Seal Co.,Ltd.,Chengdu Sichuan 610100,China)

机构地区：[1]兰州理工大学石油化工学院,甘肃兰州730050 [2]成都一通密封股份有限公司,四川成都610100

出　　处：《润滑与密封》2024年第6期57-64,共8页Lubrication Engineering

基　　金：国家自然科学基金项目(51565029)。

摘　　要：为探究力载荷下分瓣式碳环密封结构参数对密封面径向变形的影响规律,采用数值计算求解压力控制雷诺方程,获得气膜压力,再结合有限元分析软件进行流固热耦合仿真模拟,探究特定工况下不同结构参数对碳环变形的影响,分析主密封面径向变形特性。研究表明:力变形中,防转销的安装位置对碳环径向变形量影响最大,选取恰当的安装位置可减小径向变形量;外部凸结构不均匀且圆心角比例较大时,径向变形量较小;两侧搭接口比例越大时径向变形量越小;拉紧弹簧和压紧弹簧的选取对碳环径向变形量影响较小;弹簧压力越大时径向变形量越小,但弹簧压力过大时,容易导致碳环磨损加剧、断裂甚至密封失效,应参考实际工况选择适当弹簧压力。研究结果为分瓣式碳环密封的结构优化设计提供参考。In order to explore the influence of the structural parameters of the split type carbon ring seal on the radial deformation of the sealing surface,the numerical calculation was used to solve the pressure control Reynolds equation to obtain the gas film pressure.The fluid-solid thermal coupling simulation was conducted in combination with the finite element analysis software to explore the influence of different structural parameters on the radial deformation of the carbon ring under specific working conditions,and the radial deformation characteristics of the main sealing surface was analyzed.The results show that the installation position of the anti-rotation pin has the greatest influence on the radial deformation of the carbon ring,and the radial deformation can be reduced by selecting the appropriate installation position.When the external convex structure is uneven and the ratio of the center angle is large,the radial deformation is small.The larger the ratio of the lap joints on both sides,the smaller the radial deformation.The selection of tension spring and compression spring has little influence on the radial deformation of carbon ring.The larger the spring pressure,the smaller the radial deformation.However,when the spring pressure is too high,it can easily lead to increased wear,fracture of the carbon ring,and even the failure of seal.The refore,appropriate spring pressure should be selected based on actual working conditions.The research results provide a reference for the structural optimization design of split carbon ring seals.

关 键 词：分瓣式碳环 碳环密封 流固耦合 力变形 

分 类 号：TH117.2[机械工程—机械设计及理论]