The invention belongs to the technical field of aircraft sealing devices, and particularly relates to a method for calculating the leakage amount of a split type annular sealing device, and the method comprises the following steps: 1, building a structural region model and a fluid region model; 2, segmenting the structure region model and the fluid region model, and carrying out grid division; 3, establishing a temperature field-flow field
coupling analysis model of the split type annular sealing device; 4, setting boundary conditions of temperature field-flow field
coupling analysis of the split type annular sealing device; 5, material
physical property parameters of temperature field-flow field
coupling analysis of the split type annular sealing device are set; sixthly, a steady-state calculation model is adopted, the calculation
step number and the iteration step length are set, a temperature field-flow field coupling analysis result of the split type annular sealing device is calculated, and the pressure value of oil on the inner surface of the movable sealing seat and the temperature value of the movable sealing seat are obtained; step 7, establishing a temperature field-flow field-structure field coupling analysis model in the Mechical
software; 8, setting boundary conditions of temperature field-flow field-structure field coupling analysis; and 9, calculating the deformation amount of the split type annular sealing device during temperature field-flow field-structure field coupling analysis, extracting a radial sealing
surface deformation value and an axial sealing
surface deformation value, and calculating the leakage amount G according to the established leakage amount model of the split type annular sealing device.