Gas phase crystallization top stirring double-end-face mechanical sealing structure

The invention relates to a gas phase crystallization top stirring double-end-face mechanical sealing structure which is characterized in that an isolation sleeve is sleeved on the lower portion of a rotating shaft, the bottom of the isolation sleeve is in sealing fit with a first gland through an O-shaped ring, a shaft sleeve is sleeved above the isolation sleeve and on the rotating shaft, a driving ring is sleeved above the shaft sleeve and on the rotating shaft, and a clamping table above the first gland is matched with a second gland. The second gland sleeves the atmosphere side sealing assembly, the atmosphere side sealing assembly is matched with a clamping table at the upper part of the shaft sleeve, the lower part of the shaft sleeve is matched with a clamping table of a medium side compensation ring through a medium side dynamic O-shaped ring, and the medium side compensation ring is positioned above the medium side non-compensation ring; a liquid supplementing opening and a liquid discharging opening