The application provides a self-sealing oil
sump applied to the field of engine oil sumps, and through cooperation of an upper sealing ring and a compensation sealing ring, when the oil
sump is connected with a
crankcase, the upper sealing ring is deformed towards the compensation sealing ring under
extrusion of a connecting surface, and then the upper sealing ring is in
extrusion contact with the compensation sealing ring, the compensation sealing ring is deformed downwards, when the sealing of the upper sealing ring is damaged, the compensation sealing ring gradually recovers deformation, and then an upward pushing force is generated on the inner variable ring, the sealing between the upper sealing ring and the
crankcase due to damage is effectively compensated, in addition, in the process of gradual
recovery of the compensation sealing ring, the
extrusion force of the sealing assisting liquid on the sealing measurement ring gradually decreases, and the sealing measurement ring gradually recovers deformation, at this time, the sealing measurement ring has obvious data change, and then the sealing measurement ring can timely remind the workers, and compared with the prior art, the safety hidden danger is effectively reduced.