Graphite sealing structure for sealing lubricating oil cavity between aero-engine rotors

A graphite sealing structure for sealing a lubricating oil cavity between aero-engine rotors comprises a high-pressure turbine rotor, a low-pressure turbine rotor and an outer cover, the check ring and the rear thrust ring are arranged on the outer cover in a sleeving manner; the front end face of the check ring is tightly attached to the high-pressure turbine rotor. Rubber sealing rings are arranged between the check ring and the outer cover as well as between the rear thrust ring and the outer cover; the graphite ring assemblies are arranged on the outer cover in a sleeving mode, and a middle ring is arranged between every two adjacent graphite ring assemblies; the graphite ring assembly comprises a front sealing ring, a rear sealing ring and an elastic piece, and the elastic piece is used for forming axial thrust on the front sealing ring and the rear sealing ring; the front end face of the front sealing ring of each graphite ring assembly is matched and sealed with the rear end face of the check ring or t