文档介绍：合肥工业大学
硕士学位论文
机械密封热动力学行为有限元模态研究
姓名:邢菲
申请学位级别:硕士
专业:机械电子工程
指导教师:陈科
2011-05
机械密封热动力学行为有限元模态研究

摘要

在机械密封装置中,机械密封动静环接触面上的摩擦热容易造成干摩擦或
产生较大的温度梯度,从而使密封环内产生过大的热应力并出现热裂纹,严重
影响机械密封的性能。本文基于 ANSYS 软件平台,综合国内外在机械密封性能
理论研究的新成果,从热—结构耦合稳态的温度场及应力场两个角度建立了机
械密封环的有限元模型,并对温度场、热应力场做了分析研究。
本文基于有限元模型,将机械密封静环简化为轴对称模型,用有限单元法
求解其稳态温度场及热应力场的数值结果。在建立了机械密封环的物理模型之
后,介绍了用轴对称问题的有限单元法求解温度场及应力场的具体过程,并指
出了在计算中需要注意的问题。应用热—结构耦合法给出了密封静环的温度场
分布和热应力分布规律。这对于机械密封的设计和制造具有理论指导和现实意
义。

关键词:机械密封;热--结构耦合分析;摩擦热;热稳态分析
The Study of the Finite Element Model of Mechanical
Seal Thermal Dynamics

ABSTRACT

For mechanical seal’s equipment,the friclion heat between mechanical seal
rings may result in dry fliction or a bigger temperature gradient which should
produce greater thermal stresses and even hot crack , which influenced the whole
sealing performance seriously .Because the parameter on sealing performance was
difficult to calculate accurately by traditional theory ,the system model of
calculating meachanical sealing performance was needed urgently .In this paper
Based on ANSYS software bined with the theory trends on mechanical
sealing performance ,the systematic finite element model of analyzing sealing
performance from two respects:coupling of thermal—structural stable state and
flowing field had been set up in this paper ,and the teperatural field, thermal stress
were studied.
Seal ring can be simplified as two axisymmetric indepent models ,and the
finite element method is used to solve the problem of the temperature field and
stress field of seal ring .After building up the physical model of the ring ,the
axisymmetric finite element formulas has been derived , and thermal boundary
conditions has also been given .The distribution of the temperature field and the
stress field of seal rings has been given by means of finite element analysis,which
is guidace and realistic sense to design and make mechanical seal.

Key words:Me