组合液压阀端面密封结构的有限元设计

摘要

采用限元分析方法对某组合液压阀端面密封结构进行分析，建立该密封结构的轴对称模型，选择合适的料本构模型并合理地描述接触边界条件，结合有限元分析方法和现行设计标准对该密封结构的尺寸进行设计，并从密性和强度两个方面对该密封结构的失效模式进行分析，得到密封圈的变形、应力分布以及接触表面的接触压应力和密长度，证实该密封结构的可靠性。%A face seal structure for one combinational hydraulic valve was analyzed by finite element method,and the axis symmetric model of the seal structure was established. By selecting the appropriate material constitutive model and de-scribing the contact boundary condition properly,the size of the seal structure was designed by finite element analysis method and current design standards. The failure mode of this seal structure was analyzed from two aspects of sealing per-formance and strength. The deformation and stress distribution of rubber ring,contact compressive pressure and seal length of the contact surface were obtained by analysis,and reliability of the seal structure was proved.