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我厂三台7—29—12型煤粉鼓风机,是三台回转窑窑头输送煤粉的唯一设备,转速1480r/min,轴承润滑方式是半浸式润滑;风机与JR117—4型,180kW电动机配套。一九九○年以前,这三台风机的轴承一直采用40~#～50~#机械油润滑。由于转速高,轴承易发热,再加上从磨机过来的已预热的煤粉温度在70～80℃,煤粉温度从主轴传到轴承。由于温度高,润滑粘度下降,轴承润滑不良,易损坏,油封易变形,轴承两端常年严重漏油,尽管一星期加油一次(每次加油5kg),也无际于事,往往3～4个月换轴承或油封一次,维修费用极高,对生产影响不小,油耗大又严重污染环境。每次检修都发现油池中严重缺油,附在轴承、主轴、池壁上的油已被烧成积炭,油封被烧焦变形。
I plant three 7-29-12-type pulverized coal blower, is the three rotary kiln conveyor pulverized coal only equipment, speed 1480r / min, the bearing lubrication is semi-immersion lubrication; fan and JR117-4-type, 180kW Motor matching. Before 1990, the bearings of these three fans were always lubricated with 40 ~ # ~ 50 ~ # mechanical oil. Due to high speed, easy to heat the bearing, coupled with the preheated pulverized coal from the mill over the temperature of 70 ~ 80 ℃, pulverized coal temperature reached the bearings from the spindle. Due to the high temperature, the viscosity of lubricating oil is decreased, the bearings are poorly lubricated, easily damaged, and the seals are easily deformed. The oil leaks all the year round at both ends of the bearing. Although the oil is supplied once a week (5kg each time) Change bearings or seals once, the high maintenance costs, the impact of production is not small, fuel consumption and serious pollution of the environment. Each repair found a serious lack of oil pool, attached to the bearings, spindle, pool wall of oil has been fired coke, oil seal was scorch deformation.