基于ANSYS的机械密封热力耦合变形计算及分析

Analysis and calculation of thermal stressing coupled deformation of mechanical seal based on ANSYS

针对机械密封在工作时摩擦生热以及受外载荷作用,导致密封端面变形,进而影响密封性能的问题,应用ANSYS软件,对机械密封动环端面温度场分布规律以及温度场引起的热变形、受力引起的力变形和热力耦合变形进行分析.研究结果表明:摩擦生热导致动环端面温度呈梯度分布,随着半径的增大温度从高到低;热变形使端面产生拉伸位移,随着半径的增大变形量减小;受力引起的变形与热变形趋势相反,在内径处产生最大压缩位移,外经处产生最大拉伸位移;热力耦合变形介于两者之间.因此,综合考虑热力耦合变形比单独考虑热、力变形对端面变形影响较小.

In mechanical seal at work heat will be generated by friction and the seal will be subjected to the action of external loads,resulting in the deformation of the end sealing face and then affecting the performance of the mechanical seal.ANSYS software is used to analyze the distribution pattern of the temperature field at the end face of the rotating ring,the thermal deformation caused by temperature field,the deformation caused by force action,and the coupled thermal-stressing deformation.The research result shows that heat generated by friction will exhibit gradient distribution,and the temperature decreases with the increase of radius.Thermal deformation will generate tensile displacement and it decreases with the increase of radius.Deformation caused by force action will be opposite to the trend of thermal deformation,maximum compression displacement will be generated at the inner radius,maximum tensile displacement will be generated at external radius.The thermal-stressing coupled deformation will be between the above two deformation.Therefore,overall consideration of thermal-stressing coupled deformation will affect less the deformation of end face compared with consideration of only thermal deformation or mechanical deformation.