Classifier thin oil lubrication oil spill prevention measures

2020 - classifier thin oil lubrication oil spill prevention measures 06 - 26 hong-bo wang ( Sinoma zibo heavy machinery co. , LTD. ) Thin oil lubrication is one of the important ways of classifier lubrication, thin oil lubrication can not only form the oil film to reduce friction, the bearing friction tropical walk, at the same time as the oil flow and circulation, to take away bearing indoor metal abrasive and impurities and rinse, lubrication, reduce friction and reduce wear and reduce wearing parts wear and lower power consumption and prolonging the service life of the equipment, but the packing element classifier ( Mainly skeleton oil seal and O sealing ring) After a period of wear or failure, incorrect operation is easy to cause the bearing chamber oil spill. Bearing chamber leak repair is very tedious, need the whole grinding line outage, seriously affect the production. To avoid bearing chamber oil spill accident, this paper briefly describes classifier thin oil lubrication system operating some of the oil spill prevention measures, for the colleague reference. 1 lubrication principle as shown in figure 1, thin oil station pumping oil entering the inlet pipe of the upper bearing chamber, the upper bearing lubrication along the spindle and the spindle sleeve ring clearance flow down, reach the lower bearing chamber, the lower part of the lubrication bearing after the return pipe flow to dilute gas station. In the upper and lower transparent cover all equipped with skeleton oil seal and type O sealing ring, in the bearing chamber equipped with vent valve, at the bottom of the shaft and the skeleton oil seal with transparent cover under the working place is equipped with the shaft gland in chrome, chrome plated gland with type O sealing ring. 2 leakproof measures ( 1) Keep the vent valve. Ring of bearing housing and spindle and the spindle improperness is airtight, through the relief valve discharge of oil and gas, make the lubricating oil inside the sealed cavity in addition to the weight without outside pressure, at the same time pay attention to purge valve holes down, avoid congestion. （ 2) Choose the right product. Lubricating oil to form a certain thickness of oil film, both at the same time to considering the lubricating oil to have good liquidity, generally choose ISOVG220 ( Winter) And ISOVG320 ( Summer) 。 （ 3) An oil change on a regular basis. Add the lubricating oil for the first time to be in a month after the replacement of equipment operation, then to change once a year, given the cost, can be replaced every two years, but the middle to use filter oil machine processing, can also according to the test results, product physical and chemical index for determining more reasonable oil change period. （ 4) Proper oil supply pressure and flow control. Thin oil terminal nominal pressure is zero. The operational pressure of 4 mpa, general control in 0. 15 ~ 0. 25 mpa, flow control in a suitable range, if the traffic is too big, arrived in the bearing chamber of lubricating oil is not through the rolling element bearing clearance in time into the spindle and the spindle set of circular clearance, cover will pass on through the vent valve, oil waste and environmental pollution, serious when broken to the upper lip, skeleton oil seal oil seal failure. （ 5) Control the proper air pressure and air seal air quantity. Efficient cage classifier is negative pressure operation, a chrome plated gland at the bottom of the spindle and the spindle and the relationship between relative motion between the transparent cover, there are gaps, so a small amount of powder ( 0 ~ 5μ m） Easily through the gap into the lower part of the bearing chamber, and then into the lower part of the skeleton oil seal and chrome plated gland, accelerate the skeleton oil seal and chrome plated set of wear and tear, the seal failure. To offset the negative pressure operation, the outside world under the clean air from the inlet pipe through the transparent cover into the chrome plated gland ring with transparent cover under the heaven in the cavity, with chrome plated gland between transparent cover under the circular gap ( As shown in figure 1 A) Blow out down, to avoid the powder into the lower bearing chamber. Air seal is not used to seal oil, but to protect seal components. Air seal pressure control in commonly 2500 ~ 3000 pa, flow control in 0. 5 ~ 1 l / min。 Fan wind pressure and operating pressure according to system appropriate adjustment, pressure is too low, not seal dust; Pressure is too high, easy to broken skeleton oil seal lip the oil seal failure moment caused leak. Air seal air must be clean, on-site installation to avoid introduction from the chute fan, but from the compressed air piping after decompression access or fan alone setting. （ 6) Lubricating oil temperature. Usually lubricating oil temperature control in 20 ~ 45 ℃, adjusted by gas station of the electric heater and cooler. The oil temperature is too low, the oil viscosity increases, poor oil, spindle oil set of memory increase; The oil temperature is too high, the oil viscosity is reduced, increasing the likelihood of oil leakage. （ Source: China cement spare parts network)