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化工学报  2013 

基于质量守恒的LaserFace液体润滑机械密封数值分析

DOI: 10.3969/j.issn.0438-1157.2013.10.029, PP. 3694-3700

Keywords: 机械密封,空化,质量守恒,有限元,流线迎风

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Abstract:

针对传统Reynolds空化边界不能准确预测机械密封泄漏率的问题,采用JFO空化边界条件,建立了基于质量守恒的LaserFace液体润滑机械密封数学模型,采用流线迎风有限单元法求解润滑方程,对比分析了不同操作工况下4种不同端面型槽结构(普通端面、仅含引流槽端面、仅含回流槽端面、激光脸)的密封性能。结果表明:所建立数学模型可准确预测机械密封泄漏率,LaserFace端面在低速时易于打开,高速低压下回流槽具有明显回流泵送作用,LaserFace端面机械密封泄漏率显著低于仅含引流槽端面,摩擦系数小于普通端面,综合性能明显优于其他型槽结构。

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