The structural parameters of the floating oil seal determine the specific pressure of the end face,and then directly affect the sealing effect,so it is of great significance to establish an accurate relationship between the specific pressure of the end face and the structural parameters of the floating oil seal.Abaqus software was used to establish a two-dimensional axisymmetric model of the floating oil seal.The influences of structural parameters such as the geometric parameters of the floating oil seal,the installation distance,and the hardness of the O-ring seal,etc.on the end-face specific pressure were analyzed through simulation orthogonal experiments.The key factors affecting the specific pressure of the end face were analyzed and the regression model between the specific pressure of the end face and the structural parameters of the floating oil seal was obtained.Finally,the accuracy of the regression model was verified by experiments.The results show that the key structural parameters that affect the specific pressure of the end face of the floating oil seal include the installation distance,the waist diameter of the floating seal ring,the cone surface angle of the floating seal seat,the hardness of the seal ring,and the diameter of the cross section of the seal ring.The calculated results of the regression model are in good agreement with the experimental data,which shows that the regression model is in line with the reality and can provide reference for the structural design of floating oil seal.