Kiln head sealing structure of rotary kiln

The invention belongs to the technical field of rotary kilns, and particularly relates to a kiln head sealing structure of a rotary kiln, which comprises a barrel and a kiln head cover sleeved on the head of the barrel, a fixing ring is mounted on the outer ring surface of the kiln head of the barrel, a bearing is fixed on the outer ring surface of the fixing ring, the kiln head cover is mounted on the outer ring surface of the bearing, and an annular groove is formed in the inner side of the kiln head cover. A limiting ring is installed in the annular groove in a clamped mode, at least two groups of sealing balls are installed on the side face, corresponding to an inner ring of the bearing, of the limiting ring in a circumferential array mode, the multiple sealing balls in the circumferential array make contact with one another in a fit mode, and the multiple sealing balls make contact with the side face of the inner ring in a sealed fit mode; according to the kiln head cover, the phenomenon that dust in the