Mechanical sealing device for high temperature medium

The utility model discloses a mechanical sealing device for a high temperature medium. The mechanical sealing device is characterized by comprising an internal gland, an external gland, a shaft sleeve, a corrugated-pipe elastic compensation component, a static ring and a dynamic ring, wherein the shaft sleeve is sheathed on a pump shaft; the internal gland and the external gland are sheathed on the exterior of the shaft sleeve, and form an annular cavity with the external diameter plane of the shaft sleeve; the corrugated-pipe elastic compensation component, the static ring and the dynamic ring are arranged in the annular cavity; the outer end of the corrugated-pipe elastic compensation component is fixedly arranged on the external gland; the static ring is fixedly arranged on the inner end of the corrugated-pipe elastic compensation component; the dynamic ring is fixedly arranged on the shaft sleeve; the outer end face of the dynamic ring and the inner end face of the static ring are in contact to form a sea