Ring valves and design inherent ring dynamics phenomena

摘要

In recent years valves employing multiple sealing elements such as ring valves or (mini) poppet valves have emerged. Although these valve types may have merits with regard to performance and robustness, also applications with rather poor performance have been reported. When developing such valves the authors have encountered unexpected problems in regard to valve dynamics and subsequent damages. Analysing the problems different approaches in modelling valve dynamics had to be followed. Some unknown effects turned out to be of significant importance for explaining the observed problems. This paper gives an insight into the gasdynamic effects ruling valve dynamics and sheds new light on the understanding of oil sticktion.