基于真实形貌的机械密封摩擦界面热力致损分析

Thermal Damage Analysis of Friction Interface of Mechanical Seal Based on Real Morphology

机械密封在运行时密封界面热力及摩擦状态多变,为了探究机械密封运行时的界面热力及磨损等特性,使用非接触3D形貌仪,获得摩擦界面微观形貌信息,逆向构造摩擦界面三维模型,基于该模型对密封环摩擦过程进行分析,进一步得出摩擦界面的Von Mises应力、热源、振动、磨损区域、磨损量等相关特性。结果表明,在同一时刻SiC-SiC组的磨损面积均小于SiC-C组;SiC-C组摩擦界面的热源分布相比于SiC-SiC组更加复杂;密封环启动瞬间SiC-C组的法向加速度远大于SiC-SiC组;SiC-C组的磨损量约为SiC-SiC组的3倍。

Both thermal and friction state of the sealing interface varies when mechanical seal operates.For purpose of exploring interface thermal and wear characteristics in the mechanical seal,having non-contact 3D morphometer adopted to obtain micro-mophology information of the friction interface and the 3D model of reversely-constructed friction interface was implemented,including having this model based to analyze friction process of the seal ring,and the relevant characteristics of friction interface such as Von Mises stress,heat source,vibration,wear area and wear amount further obtained.The results show that,the wear area of SiC-SiC group is smaller than that of SiC-C group at the same time and the heat source distribution at the frictional interface of SiC-C group becomes more complex than that of SiC-SiC group.The normal acceleration of SiC-C group is much larger than that of SiC-SiC group at the beginning of the sealing ring and the wear of SiC-C group is about 3 times that of SiC-SiC group.