排灌机械工程学报2017，Vol.35Issue(8)：692-699,8.DOI:10.3969/j.issn.1674-8530.17.0029
双向自泵送流体动静压型机械密封性能数值模拟
Numerical simulation of performance for bidirectionalself-pumping hydrodynamic-static mechanical seal
摘要
Abstract
The stable operation of bidirectional hydrodynamic mechanical seal need clean blocking fluid and assistance system.To solve this problem, a bidirectional self-pumping hydrodynamic-static mechanical seal was presented.Fluent was used to carry out numerical simulation on pumping-out and pumping-in hydrodynamic mechanical seals, so as to achieve the opening force, lea-kage and stiffness of mechanical seals and to analyze the relationship between the flow field characteristics and the sealing performance.The results show that the pumping-in hydrodynamic mechanical seal has larger opening force, while the pumping-out hydrodynamic mechanical seal has smaller leakage.Both of them do not need assistance system to provide blocking fluid.The flow direction of the fluid in the groove of the pumping-out type is around-90°, the fluid flows from the root to the outside of the groove.For the pumping-in type, the flow direction of the fluid in the groove is around 70°, while that in the area linking the seal dam and groove root is around-80° and both direct are at the drainage hole.The pumping-in and pumping-out hydrodynamic mechanical seals have great capabilities to antiparticle.The stiffness of the pumping-in hydrodynamic mechanical seal is bigger than that of the pumping-out type.The research provides a theoretical foundation for the design, manufacture and operation of the bidirectional self-pumping hydrodynamic-static mechanical seal.关键词
机械密封/数值模拟/流场特性/密封性能Key words
mechanical seal/numerical simulation/flow field characteristics/sealing performance分类
机械制造引用本文复制引用
严彦,陈卫,孙见君,於秋萍,马晨波,张玉言,佘宝秋..双向自泵送流体动静压型机械密封性能数值模拟[J].排灌机械工程学报,2017,35(8):692-699,8.基金项目
国家自然科学基金资助项目(51375245,51505230) （51375245,51505230）
江苏省自然科学基金资助项目(BK20130976) （BK20130976）
江苏省大学生创新训练计划资助项目(201410298051Z) （201410298051Z）
