The forces that the drum components of the drum dryer bear under the working state include: the internal pressure of the heating medium, the radial force, the circumferential force when the outer wall of the drum is provided with the scraper device and the pressure roller cloth film device are tightened, the friction resistance in the rotation of the drum and the cutting force for peeling off the material film, the radial force and the circumferential force between the upper moving parts of the end shaft and the end shaft, and the packing box of the air inlet of the end shaft is sealed The friction resistance of the packing placed against the rotating shaft.<br>
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