镶嵌式直线深槽流体动压型机械密封性能研究  

Investigation of Sealing Performance of Mosaic Hydrodynamic Mechanical Seal with Straight Line Deep Groove

作　　者：刘杰[1,2] 李鲲[1,2] 吴兆山[2] 李香[2] 彭旭东[1] 

机构地区：[1]浙江工业大学过程装备及其再制造教育部工程研究中心,浙江杭州310032 [2]合肥通用机械研究院压缩机技术国家重点实验室,安徽合肥230031

出　　处：《流体机械》2013年第12期16-21,26,共7页Fluid Machinery

基　　金：国家科技支撑计划资助项目(2011BAF09B05);国家自然科学基金资助项目(50575152;51005209)

摘　　要：以端面开有直线深槽的镶嵌式密封结构为分析对象,建立了密封环与润滑液膜间的流固力耦合模型,采用有限差分和有限元法分别求解润滑方程和变形方程,研究了密封压力和转速对润滑液膜的影响规律,分析了操作参数对密封性能的影响。研究结果表明,由于直线深槽作用,密封端面形成了一定的波度和锥度,波度随着压力的升高而变大,但锥度增幅不是很明显,而对波度的变化影响较大。密封端面的波度和锥度随转速的变化不大。密封压力升高时,密封端面间的泄漏率增大,摩擦系数相应地减小;密封转速增大时,密封端面间的泄漏率变化不是很明显,而摩擦系数相应的增大。Based on the structure of mosaic mechanical seal with straight deep line groove, the mathematic model was devel- oped with the seal ring and lubrication film, which solves the lubrication and deformation equation with finite difference and ele- ment method respectively. The effect of the pressure and speed on lubrication film was studied and the operating parameters on mechanical performance were analyzed. It is found that the seal face with straight deep line can form the waviness and the taper. While the pressure elevated, the waviness becomes larger, the taper is fewer changed. But it has a large effect on the waviness. While the speed increases, the waviness and taper of the seal face has less variation. The higher the pressure is, the larger the leakage and the smaller the friction coefficient. With the speed rising, the leakage changes slowly and the friction coefficient be- comes larger.

关 键 词：核主泵 直线深槽 密封性能 流体动压效应 

分 类 号：TH117.2[机械工程—机械设计及理论]