螺旋排布微孔端面机械密封的性能研究  

Study on the Performance of Mechanical Seal with Micro-pores Distributed in Helical Line

作　　者：吴朝辉[1] 孟祥铠[1] 李纪云[1] 白少先[1] 盛颂恩[1] 

机构地区：[1]浙江工业大学机械工程学院化机研究所,浙江杭州310032

出　　处：《润滑与密封》2010年第11期39-43,共5页Lubrication Engineering

基　　金：国家自然科学基金资助项目(50775206和50805130);浙江省杰出青年人才基金项目(R1090833);浙江省自然科学基金项目(Y1090807)

摘　　要：端面微孔排布方式对激光加工多孔端面机械密封性能影响显著。通过建立螺旋排布微孔端面机械密封的理论分析模型,运用有限元法和数值模拟工具,获得密封端面液膜压力分布。以液膜刚度、开启力、泄漏量和刚漏比等密封性能参数为评价指标,比较径向直排微孔机械密封和螺旋排布微孔机械密封的性能优劣,分析螺旋排布微孔几何参数(螺旋角、径向开孔比、周向开孔比等)对密封性能的影响规律。结果显示,在同等工况下,螺旋排布微孔机械密封相比径向直排微孔机械密封可以显著提高密封端面的液膜刚度、开启力和刚漏比。进一步的优化分析表明,适当的螺旋角、周向开孔比和径向开孔比可以显著提高密封性能。The distribution pattern of micro-pores on the end face of mechanical seals remarkably influences the performance of mechanical seals by laser surface texturing （LST-MS）. By establishing the theoretical model of mechanical seal with micro-pores distributed in helical line （S-LST-MS） and using the finite element method and the numerical simulation tool, the pressure distribution of lubrication film between seal faces was obtained. Taking film stiffness, opening force, leakage and ratio of stiffness to leakage as the evaluating indicators, seal performance of mechanical seal with micro- pores distributed in helical line was compared with that of one with micro-pores in straight line（ R-LST-MS）. The effects of the geometric parameters such as helix angle, the textured length ratios along circumferential direction and along radial di- rection on seal performance were analyzed. The results show that, in the same conditions, compared with R-LST-MS, S-LST- MS can improve the film stiffness, opening force and ratio of stiffness to leakage. Further optimization analysis suggests that appropriate helix angle, the textured length ratios along circumferential direction and along radial direction can improve seal performance.

关 键 词：机械密封 多孔端面 有限单元法 密封性能 

分 类 号：TH117.2[机械工程—机械设计及理论]