Generators are indispensable equipment for all power companies in the form of power generation, and an important part of power plants. With the continuous development of high-parameter, high-power, and large-capacity units, especially the development of thermal power generation, the rotor, The journal requirements are getting higher and higher due to iron filings and impurities in the lubricating oil system; during the start-up of the unit, due to the influence of low oil temperature or oil pressure, the oil film is not formed and the bearing bush and journal are worn.