Movement characteristics: sliding bearing work, the shingle and the rotating shaft between the requirements of a very thin film of oil lubrication. If the lubrication is poor, between the shaft tile and the rotating shaft there is direct friction, friction will produce a very high temperature, although the shaft tile is made of special high temperature alloy material, but the direct friction generated by the high temperature is still enough to burn it. Copper tile may also be due to excessive load, high temperature, impurities in the lubricant or viscosity abnormalities and other factors caused by burning tile. The sliding bearing is damaged after burning.