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Analysis of flow field and performances in hydrodynamic mechanical seal based on fluid-solid-heat interaction |
CHEN Huilong, LI Tong, ZHAO Binjuan, REN Kunteng, WANG Bin |
School of Energy and Power Engineering of Jiangsu University, Zhenjiang, Jiangsu 212013, China |
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Abstract To analyze the influence of the deformation on the fluid film in hydrodynamic mechanical seal, the two-way fluid-solid-heat interaction model of rotating ring-fluid film-stationary ring was set up based on the workbench platform. The internal flow field after deformation as simulated, and founded on the results obtained, the pressure, temperature and velocity in flow field were compared before and after the fluid-solid-heat interaction. At last, the sealing performance including opening force, friction torque and leakage was calculated and the differences of the performance before and after the fluid-solid-heat interaction were analyzed. The results show that the fluid film is compressed in the vicinity of end face on the rotating ring after the two-way fluid-solid-heat interaction calculation, and near the end face of the stationary ring, the fluid film thickness shows significant wavy cyclical fluctuations in the circumferential direction, the average thickness is decreased near the outer diameter, and increased near the inner diameter, while it the maximum change of fluid film thickness is about 16% in this study. The pressure and temperature distribution are similar before and after the coupling, however, the maximum pressure of the fluid film becomes larger which is about 67.0% in the study, the maximum temperature is slightly higher, and the velocity near the root of the spiral groove is reduced. And after considering the fluid-solid-heat deformation, the opening force and leakage become larger significantly, and the friction torque is slightly larger too, and the higher the rotating speed, the greater the differences of the sealing performance parameters.
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Received: 15 July 2016
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