Abstract:The threedimensional model of the rotating ring and gas film of spiral groove dry gas seals was established by using the SolidWorks software.The oneway fluid structure interaction analysis was carried out by using ANSYS Workbench software to get the stress and strain distribution of the rotating seal face,and the effect of rotating speed and pressure on the stress and strain at the end surface of the rotating ring was studied.The results show that the stress and strain of the end face of the rotating ring seal are mainly concentrated in the spiral groove area,and the maximum stress and strain appear in the root of the spiral groove,which shows the good dynamic pressure effect of the spiral groove dry gas seal.The speed and the pressure have great influence on the stress and strain of the end surface of the rotating ring,and the maximum stress and strain,the minimum stress and strain of the end face of the rotating ring are increased with the increasing of the rotating speed and pressure.