The leakage characteristics of metallic seals have a significant influence on valve performance. The contact status along the sealing zone greatly affects sealing properties, but is still not fully understood in current studies. There are mainly two different models for the seal’s contact mechanics: the multi-asperity model and the magnification-based model. This paper conducted a comparative analysis of leakage calculations for metallic seals of ball-seat valves based on the above two contact models. The test rig for measuring leakage values at different pressures has been constructed. The simulation with/without considering plastic effects is presented and verified by the experiment. The results indicate that the magnification-based model, with the consideration of plastic effects, can provide a better coincidence with experimental results.

金属密封件的泄漏特性对阀门性能有显着影响。沿密封区的接触状态极大地影响了密封性能，但在目前的研究中仍未完全了解。密封件的接触力学主要有两种不同的模型：多粗糙度模型和基于放大率的模型。本文基于上述两种接触模型，对球座阀金属密封的泄漏计算进行了对比分析。建立了测量不同压力下泄漏值的试验台。模拟有/没有考虑塑性效应，并通过实验验证。结果表明，在考虑塑性效应的情况下，基于放大倍数的模型可以提供与实验结果更好的吻合度。