运用Fluent软件对泵入式自泵送机械密封与螺旋槽流体动压型机械密封进行三维流场动力学仿真分析，比较研究了两种流体动压型机械密封在不同几何参数和操作条件下的端面开启力和泄漏率。结果表明：在相同的结构和操作条件下，螺旋槽机械密封的动压效应和泄漏率均大于自泵送机械密封的相应值，其开启力与泄漏率的比值小于自泵送机械密封的相应值的比值；端面结构参数和转速对螺旋槽机械密封的开启力和泄漏率影响显著，对自泵送机械密封影响不明显。螺旋槽机械密封比自泵送机械密封在性能上具有更高的尺寸依赖性。%3D flow field dynamics of two hydrodynamic mechanical seals of self-pumping and spiral groove, which were based on “pumping in” principle, were simulated by Fluent software. Sealing properties of opening force and leakage rate were compared on these two seals at various structural and operating parameters. The numerical simulation results showed that, at the same structure and operating condition, the spiral groove mechanical seal had higher hydrodynamic effect and leakage rate but lower ratio of opening force over leakage rate than self-pumping mechanical seal. In terms of seal performance of opening force and leakage rate, the impact of both transverse structure parameters and rotating speed were significant to spiral groove mechanical seal but insignificant to self-pumping mechanical seal. The performance of hydrodynamic mechanical seals is more dependent on dimensions for spiral groove mechanical seal than for self-pumping mechanical seal.
展开▼
