Abstract:In order to investigate the effect of friction vibration caused by dry friction on the seal life during startup and shutdown of dry gas seal rings,a simplified twoterminal dry gas seal model was established and the structure grid was divided.The finite element software Abaqus was used to analyze the transient friction vibration of the dry gas seal system at low speed.The influence of groove depth,static ring material,friction coefficient,and different groove shape on the friction vibration was discussed.The results show that the depth of the dry gas seal moving ring groove has little influence on the friction vibration. Under the same sealing pressure,the vibration amplitude of friction pairs with grooves in moving rings is significantly greater than that without grooves.“Hard to hard” material seal ring matching is better than “soft to hard” matching seal ring.Under the same working conditions,the friction pairs of Tgroove moving ring have better friction performance than the classical spiral groove friction pairs.