摘要
The coupling effect among the flow of fluid film, the frictional heat of fluid film and the thermal deformation of sealing rings is inherent in mechanical seals. The frictional heat transfer analysis was carded out to optimize the geometrical parameters of the sealing rings, such as the length, the inner radius and the outer radius. The geometrical parameters of spiral grooves, such as the spiral angle, the end radius, the groove depth, the ratio of the groove width to the weir width and the number of the grooves, were optimized by regarding the maximum bearing force of fluid film as the optimization objective with the coupling effect considered. The depth of spiral groove was designed to gradually increase from the end radius of spiral groove to the outer radius of end face in order to decrease the weakening effect of thermal deformation on the hydrodynamic effect of spiral grooves. The end faces of sealing rings were machined to form a divergent gap at inner radius, and a parallel gap will form to reduce the leakage rate when the thermal deformation takes place. The improved spiral groove mechanical seal possesses good heat transfer performance and sealing ability.
在流体薄膜，流体薄膜的部分热和密封环的热变形的流动之中的联合效果在机械密封是固有的。摩擦传热分析被执行优化密封环的几何参数，例如长度，内部半径和外部半径。螺线沟的几何参数例如螺线角度，结束半径，槽深，到堰宽度和沟的数字的沟宽度的比率，被考虑有联合效果的优化目的考虑了的流体薄膜的最大的适用力量优化。螺线沟的深度被设计逐渐地从螺线沟的结束半径增加到结束脸的外部半径以便减少螺线的水动力学效果上的热变形的变弱的效果投出。密封环的结束脸被用机器制造在内部半径形成分叉的差距，并且当热变形发生时，平行差距将形成减少漏率。改进螺线沟机械密封拥有好传热性能和封上的能力。
