Fan shaft end double-sealing structure

The utility model relates to a double-sealing structure for a shaft end of a fan. The utility model belongs to the technical field of cement production equipment. The device comprises a bearing table,a case, a bearing box and a fan mechanism are fixedly arranged on the bearing table; a driving motor is fixedly arranged in the case; the bearing box is positioned between the case and the fan mechanism; the side faces, close to each other, of the bearing box and the fan mechanism are tightly fixed. A through hole is formed in the side wall, close to the bearing box, of the case; a rotating shaftof the driving motor penetrates through the through hole and the bearing box to be fixedly connected with the fan mechanism; a protection assembly is fixedly arranged between the case and the bearingbox and comprises an inner shell and an outer shell, the inner shell is embedded and fixed in the outer shell, the outer wall of the inner shell abuts against the inner wall of the outer shell, the inner shell is arranged on t