分析了GW5000-Y/6.4-Y2型原油直接式加热炉烟道挡板转动部件润滑失效的原因,提出了用聚四氯乙烯和石墨混合烧结预压件车制而成的复合轴承替代原有的金属轴承的改进措施,并结合烟道挡板情况,提出采用不锈钢材质对烟道挡板的轴、轴套、挡板进行改进。应用结果表明,该改进方案解决了因润滑失效、锈蚀、结垢导致的烟道挡板转动不灵活或转轴卡死的故障。 The reasons for the lubrication failure of the rotating parts of the flue baffle of GW5000-Y / 6.4-Y2 crude direct heating furnace are analyzed. The composite bearings made of polytetrachloroethylene and graphite mixed preform are proposed to replace the original ones The improvement measures of the metal bearing and the improvement of the shafts, bushing and baffle of the flue baffle are proposed by using the stainless steel in combination with the flue baffle. The application results show that the improved scheme solves the problem that the flue damper baffles are not rotated smoothly or the shaft is stuck due to lubrication failure, corrosion and fouling.