Vertical main shaft of biomass granulator

The utility model provides a vertical main shaft of a biomass granulator. The vertical main shaft comprises a cross middle shaft, wherein a cuboid support rod is arranged at the center of the upper end of the cross middle shaft; the cross middle shaft and the cuboid support rod are molded by casting; a round groove is formed in the center of the lower end of the cross middle shaft; a rectangular bulge strip is arranged at one side of the inner circle of the round groove; a rotating shaft with a groove in fit use is arranged in the round groove; a rectangular groove is formed in the center of the upper end of the cuboid support rod; a vertical rectangular plate in fit use is arranged in the rectangular groove; a transverse rectangular plate is transversely arranged on the cuboid support rod; and a wheel axle with an adjustable distance is arranged among the cross middle shaft, the transverse rectangular plate and the vertical rectangular plate. According to the vertical main shaft of the biomass granulator, through changing the main shaft of a traditional granulator and arranging an inclined pressure plate, the work efficiency of the middle shaft can be further improved under the premise of not increasing equipment; and the production value of the biomass granulator can be further improved. The vertical main shaft is simple in structure, convenient to use and worthy of popularization and application.