Analysis of Thermo-mechanical Coupling Deformation of Ultra-high Speed Mechanical Seal
Aiming at the thermo-mechanical coupling deformation of ultra-high speed mechanical seal,the three-di-mensional 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 nor-mal 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 affect-ed 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 distri-bution 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.
mechanical sealultra-high speedfinite element calculationthermo-mechanical couplingdeformation analysis
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