PULVERIZER AND LUBRICATION OIL SUBSTITUTION METHOD FOR BEARING OF PULVERIZER

摘要

PROBLEM TO BE SOLVED: To prevent defect such as generation of abrasion in a shaft member and a bearing member due to deterioration of a lubrication oil.SOLUTION: A solid fuel pulverizer is equipped with: a bush 51 for supporting an outer peripheral surface of an eccentric shaft 23; a lubrication oil supply part 58 which supplies a lubrication oil supplied from the exterior to an internal space SP; a lubrication oil discharge part 59 which collects the lubrication oil flown out from the internal space SP, and discharges the collected lubrication oil to the exterior. The bush 51 has a first annular groove which is formed on an inner peripheral surface on one end side of the bush 51, a second annular groove which is provided on an inner peripheral surface on the other end side, and a spiral groove which is so provided on the inner peripheral surface that at a least a portion around a central axis X is revolved from one end connected to the first annular groove to the other end connected to the second annular groove. The lubrication oil supply part 58 supplies the lubrication oil into the first annular groove, and the lubrication oil discharge part 59 discharges the lubrication oil flown out from the other end of the bush 51 to the exterior via the second annular groove.SELECTED DRAWING: Figure 3