The invention discloses a lubricating device for a bearing on the vertical shaft of a disc-type separator. The lubricating device comprises a vertical shaft, a bearing seat, an upper bearing I, and upper bearing II, a spacer sleeve, a lower bearing, a gland, a lubricating sleeve, a belt
pulley and parallel tightening nuts. A
blind hole is axially arranged in the center of the vertical shaft. A through hole is arranged at the bottom part of the
blind hole. An annular oil groove is arranged on the lubricating sleeve. A
small hole is arranged at the bottom of the annular oil groove and is communicated with the upper bearing I on the vertical shaft. A certain clearance is arranged between the spacer sleeve and the inner wall of the bearing seat. A through hole and a hole are respectively arranged on the end surface of the belt
pulley and the bottom side surface of the belt
pulley. The
blind hole at the lower part of the vertical shaft is matched with the upper part of a suction tube. An axial through hole is arranged at the upper part of the suction tube. An air plug is transversely installed in a perforated hole at the middle part of the suction tube. An axial
small hole is arranged at the lower part of the suction tube. Axial blind holes staggered with the
small hole are arranged around the small hole, wherein the lower part of each axial blind hole is closed. The suction tube is arranged in an
oil tank. The invention has the advantages that the accessories are reduced, the damage rate of the accessories is reduced and the
lubrication effect is improved; and the structure is simple, the maintenance is convenient and the cost is low.