斜直深槽机械密封环端面变形研究

摘要

Deep grooves mechanical seal can be made to form circumferential waves and radial taper in the seal faces to generate heat hydrodynamic effect by force deformation and thermal deformation. Based on thermal equilibrium analysis and simplified model, the finite element software was used to establish the finite element analysis model of slant deep grooves dry gas mechanical seal,and the solution to seal ring temperature, thermal and force deformation were carried out. The temperature distributing rules and thermal deformation rules of the ring were obtained. The analysis results show that the circumferential waves and radial can be made by surface structure deformation of the slant deep grooves, and the heat hydrodynamic effect deformation generated. But the generation of regular waves is decided by the structural parameters of the fluid tank. The desired hydrodynamic effect is obtained when optimization design was carried out with parameters in specific conditions accordingly.%深槽密封是通过力变形和热变形在密封面形成周向的波度和径向的锥度,从而产生热流体动力楔效应.通过热平衡分析和模型简化,应用有限元软件建立斜直深槽机械密封有限元分析模型,并对密封环温度场、力热变形进行求解,获得斜直深槽密封环的温度分布规律以及热变形规律.分析结果表明:斜直深槽密封端面结构产生的变形,能够形成周向波度和径向锥度,能够产生一定的流体动压效应,但规则波形的产生同流体槽的结构参数有关,需针对具体的工况参数进行相应的优化设计,方能达到所需要的流体动压效果.