Stirrer

The utility model discloses a stirrer which comprises a rack, a power device, a power drive device, a stirring cylinder and a lifting device for lifting the stirring cylinder, wherein the power device and the power drive device are arranged on the rack; a main stirring shaft and planet stirring shafts are connected with the bottom of a gear box through mechanical seal devices. According to the technical scheme, a stainless steel fixed ring and a epoxy resin and graphite movable ring are sealed through end faces, besides, the epoxy resin and graphitemovable ring and a sliding ring are connected through an elastic device; stressing buffer of a sealing piece in the sealing process can be increased by the elastic device, the service life of the sealing piece is prolonged, and the sealing effect is improved; the elastic tension of the elastic device can be adjusted by adjusting the position of a locating ring on a stirring shaft, so that the sealing effect of the sealing piece reaches the optimum level, and the locating ring is fixed through a locating bolt after the position of the locating ring is well adjusted; and an adjusting bolt is further arranged on the locating ring, the position of the sliding ring can be slightly adjusted through the adjusting bolt, and the sealing effect is further increased.