Abstract
Mechanical seals in centrifugal pumps used in various industrial equipment are critical components in preventing leakage of process fluid. Heat is generated at the working interface of the stationary and rotating rings due to friction. This study presents a numerical investigation to evaluate the thermal characteristics of the stationary and rotating seals during running conditions due to friction heat generation at the seal interface. The developed three-dimensional numerical model of the mechanical seal is compared with results published in the literature. An improved seal design is proposed for the stationary ring to increase the thermal efficiency and operational life of the seal. The seal interface temperature is reduced for the redesigned grooved stationary seal ring, thereby enhancing thermal performance. A comparison of the performance of the redesigned stationary ring is conducted with the conventional seal design to evaluate the effect of rotational speeds of the rotating ring and spring pressures. The thermal efficiency of the grooved stationary ring is higher by 16% than the original design. The improved seal design lowers the ring surface temperature by 10.5 °C compared to the conventional design. The proposed design is expected to improve the seal reliability of the seal with a longer operational life by reducing seal failure.
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