Numerical study on acceleration method for the end face deformation of mounted mechanical seals

ZHANG Zhi-hui, MA Run-mei, LI Shuang-xi, FENG Rui-peng, FU Guang-wei
(College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China)

Abstract: Aiming at the deformation of the end face of the mounted mechanical seals during longterm storage, an ANSYS finite element model was established to study the eccentric defects of the mounted mechanical seals and investigate the effect of accelerating the deformation of the end face of the mounted mechanical seals by the thermal cycling acceleration method. The BaileyNorton creep equation was used to numerically analyze the normal and eccentric defects of the mounted mechanical seals, and the relationship between the end face deformation and the eccentric defect of the mounted mechanical seals under natural storage conditions was obtained. Based on the creep equation, the thermal cycling acceleration process was simulated, and the relationship between the end face deformation of the mounted mechanical seals and the thermal cycling interval was obtained. The results indicate that the saddleshaped deformation of the end face of the mounted mechanical seals with eccentric defects is more obvious than normal, and the difference of peaktovalley is greater than that of a normal mounted mechanical seal. During the process of the thermal cycling acceleration, the deformation of the end face of the mounted mechanical seals has increased, and the deformation is greater than that under natural storage conditions, indicating that the acceleration effect of the thermal cycling acceleration method is obvious.
Key words: mounted mechanical seals; deformation of the end face; thermal cycling; creep; eccentric defects