摘要
针对超高转速机械密封热力耦合变形问题,建立机械密封环三维结构模型,根据实际运行工况与经验计算公式确定密封环热载荷与力载荷边界条件。采用有限元方法,开展常温与高温工况下密封环温度与变形场计算,分析不同转速与冷却水压力下密封环端面最高温度与最大轴向变形量变化。结果表明:常温工况下,密封环温度分布受端面摩擦热影响,密封端面最高温度为220℃,密封环变形量较小,且端面最高温度和轴向变形量随着转速的增大而增大;高温工况下,密封环温度分布受端面摩擦热和高温介质传热影响,密封端面最高温度为746℃,密封环变形量大,且端面最高温度随着转速的增大而增大,最大轴向变形量随着转速的增大而减小;内静环端面最大轴向变形量随冷却水压力的增加呈先减小后增大。
Aiming at the thermo-mechanical coupling deformation of ultra-high speed mechanical seal,the three-dimensional model of seal rings were built.Based on the operating conditions and empirical formulas,the boundary conditions for thermal and force load of sealing rings were determined.The temperature and deformation fields of seal rings under normal and high temperature operating conditions were calculated by using finite element method.The changes in maximum temperature and axial deformation of the seal ring end face under different rotating speeds and cooling water pressure were analyzed.The results show that,under normal temperature conditions,the temperature distribution of the seal ring is affected by the friction heat of the end face,the maximum temperature of the seal end face is 220℃,and the deformation of the seal ring is relatively small.The maximum temperature of the end face and the maximum axial deformation increase with the increase of rotating speed under normal temperature conditions.Under high temperature conditions,the temperature distribution of seal ring is affected by the friction heat of end face and heat transfer of high-temperature medium,the maximum temperature of the seal end face is 746℃and the deformation of the seal ring is big.The maximum temperature of the end face increases,and the maximum axial deformation decreases with the increase of rotating speed under high temperature conditions.The maximum axial deformation of the end face of inner stator ring decreases first and then increases with the increase of cooling water pressure.
作者
谢星
王永乐
丁思云
李香
梁彦兵
彭骞
XIE Xing;WANG Yongle;DING Siyun;LI Xiang;LIANG Yanbing;PENG Qian(Hefei General Machinery Research Institute Co.,Ltd.,Hefei Anhui 230031,China;General Machinery and Key Basic Component Innovation Center(Anhui)Co.,Ltd.,Hefei Anhui 230031,China;Hefei General Environmental Control Technology Co.,Ltd.,Hefei Anhui 230031,China)
出处
《润滑与密封》
CAS
CSCD
北大核心
2024年第8期175-181,共7页
Lubrication Engineering
基金
合肥通用机械研究院有限公司博士科技基金项目(2022011507)。
关键词
机械密封
超高转速
有限元计算
热力耦合
变形分析
mechanical seal
ultra-high speed
finite element calculation
thermo-mechanical coupling
deformation analysis
