西部环境因素对活塞环动力学影响的研究  

Study on Influence of Environment Factors of Western China on Dynamics of Piston Ring

作　　者：韩海燕[1] 张优云[1] 

机构地区：[1]西安交通大学现代设计及转子轴承系统教育部重点实验室,陕西西安710049

出　　处：《润滑与密封》2006年第12期16-19,共4页Lubrication Engineering

基　　金：国家自然科学基金项目(50375115)

摘　　要：研究了西部低气压及沙尘环境对于活塞环动力学的影响。基于气固两相流理论,分析了沙尘颗粒对于活塞环组气流及漏气量的影响。研究表明:环境气压的降低会引起环腔气压的减小,增大活塞环的不稳定性;活塞环悬浮于环槽中时,通过环槽的气体流量增大;燃气内沙尘颗粒的增多会导致漏气量增大,发动机性能变差。The influence of sand ＆ dust and low pressure on dynamics of piston ring was studied. Based on the theory of gas-solid two-phase fluid, the influence of sand ＆ dust on gas flow and blow-by of the piston ring pack was analyzed. The calculation shows that the decrease of ambient pressure can cause the decrease of the inter-ring pressure and increasing the possibility of ring＇ s instability. When the piston ring is lifted from groove, gas flow rate through the ring groove are dramatically increased. Meanwhile, increasing the concentration of sand ＆ dust can induce high blow-by and worse performance of engines.

关 键 词：低气压 沙尘颗粒 活塞环 动力学 

分 类 号：TK413.33[动力工程及工程热物理—动力机械及工程]