Combined type rotary seal structure for SF6

The utility model discloses a combined type rotary seal structure for SF6 (sulfur hexafluoride), which comprises a shaft, wherein a shaft sleeve is arranged on the shaft; the shaft sleeve and the shaft are integrally arranged in a seal flange; and two seal rings, namely an O-shaped seal ring and an X-shaped seal ring, are arranged between the shaft sleeve and the seal flange. As the X-shaped seal ring is arranged at the front end, a groove of the X-shaped seal ring can be filled with appropriate silicone grease, the sealability is better than a single O-shaped ring, and the seal rings are prevented from damages at a shaft hole when the shaft is installed.