菱形孔织构端面密封3D流/固耦合模型变形及密封性能研究

Study on deformation and sealing performance of 3D flow-solid coupling model for an end face seal with diamond pores textured

针对菱形孔织构端面液体润滑机械密封,采用有限元法求解Reynolds方程,研究不同工况条件下、结构和材料的静圆环与之配对动圆环的力变形情况及摩擦扭矩、开启力和液膜刚度等的变化规律,分析端面变形对密封性能的影响。结果表明:菱形孔织构及静压差可使密封端面产生周期性波式和径向锥度变形,变形又将产生新的动压和静压效应,与原来的菱形孔织构和静压差产生的动、静压效应相互叠加,可显著增强机械密封的性能;弹性模量和密封环厚度对端面变形及密封性能也有较大影响;另外,端面变形并非均为有害行为,最小变形并非对应最佳密封性能,应针对具体工况、结构和材料对端面密封进行优化设计,以期获得最佳密封结构。

In view of an end face liquid-lubricated mechanical seal with diamond pores textured,the By solving Reynolds equation by the finite element method,the force deformation of the stationary ring and the rotating ring mated with it and the variation law of frictional torque,opening force,liquid film stiffness,etc.were studied under different working conditions and conditions of different structures and materials,and the influence of the end face deformation on the sealing performance was analyzed.The results show that diamond pores texture and static pressure difference can make the seal end faces produce periodic wave type and radial taper deformation,and the deformation will produce new dynamic and static pressure effects,which are superimposed each other with the dynamic and static pressure effects produced by the original diamond pores texture and static pressure difference,and can significantly enhance performance of the mechanical seal.The elastic modulus and seal ring thickness also have a great influence on the end face deformation and sealing performance.In addition,the end face deformation is not always a harmful behavior,and the minimum deformation does not correspond to the best sealing performance,the end face seal should be optimized for specific working conditions,structures and materials,in order to obtain the best sealing structure.