Mill roller bearing temperature anomalies

Mill roller bearing temperature anomaly - 2019 03 - 05 roller bearing is the most core components of the mill, is in the high temperature, impact, overload, low speed running under the complex environment, thus if maintain undeserved will appear all sorts of fault. Especially the temperature of the roller bearing can lead mill often switch power, seriously affect the production schedule. Today, the author summarized a common cause of roller bearing temperature anomalies and processing methods, hoping to bring help to the production of all. Insufficient lubrication analysis of the causes, the causes of deficiency of lubricating oil in general because the kinds of lubricating oil to choose out of the question. In general roller bearing working temperature is higher, the inside of the bearing temperature is close to 200 ℃. If the wrong kind of lubricating oil, used for lubricating oil will be because of the high temperature and high pressure metamorphism or evaporate, thus losing the function of protection and lubrication of roller bearing, this will increase the heat generated by the friction roller bearings, which can lead to abnormal bearing temperature rise. In addition, if the oil too little, or change not in time, can make lubricating oil lost its original effect, causes the roller bearing is not fully lubrication, also makes the bearing temperature rise can cause premature bearing damage. Processing method: in order to get the guarantee for roller bearing lubrication, in choosing viscosity of lubricating oil will try to choose and relatively stable synthetic oils at high temperatures. When bearing running for four months must be timely replacement of lubricating oil, pay attention to the lubricating oil and each listed may not be less than 40 liters. Roller bearing internal powder into a lot of cause analysis: internal bearing if entered a large amount of powder, so the powder will and lubricating oils together, into a viscous oil and illiquid powder mixture, rather than any impact on the bearing lubrication, also can aggravate the bearing wear, raising the temperature anomaly of roller bearing. Processing method: when found the powder into the bearing internal and result in higher bearing temperature abnormal situation, should immediately replace oil seal, and examine the quality of lubricating oil, ensure its not bad. If the bearing internal accumulation of too much powder, powder and oil mixture can't along with the oil outlet, then can open the bearing internal end cover, the powder by using the method of compressed air or hydrogen filling oil mixture, inject new lubricating oil again. Sealing system damage cause analysis: sealing system is to ensure that the key link in the process of roller oil seal is not damaged. Seal the wind system is composed of seal fan and air duct. Blow out the wind from seal fan to seal the air duct. Installed on the mill of mill roller will air seal form space. How can form annular seal clean system, can ensure the powder will not enter the roller bearings, can prevent damage of powder oil seal. Each link closely, be short of one cannot, if there was a problem in which link, a duct air leakage or sundries, will cause air sealing ring of reduced pressure, air volume insufficient, so unable to form annular air sealing system, which in turn caused damage of oil seal, powder into, bearing temperature rise to a series of conditions. Methods: when the temperature of the roller is unusually high, should immediately stop production and investigation, from seal fan, along the direction of the wind to check step by step, so as to timely plug the loopholes, sealed and unsealed. Due to grinding machine working environment is relatively poor, and a lot of powder for a long time, so the fan filter is easy to be blocked, so the technical personnel to be frequently and clean, try to be and a half months at a time. And because of the working environment temperature is higher, duct appears easily softening deformation or air leakage phenomenon, should also be half on a screen, can be killed in the bud. Roller bearing local damage reason analysis: pay special attention to the quality of bearing roller bearing, but long run time also can appear the phenomenon of local damage, such as ball wear become loose, interface and so on. At this point, the roller bearing temperature must be abnormal. Methods: when the roller bearing surface uneven, local rotation, swinging amplitude increase, the noise within; Or at the instant of the mill boot operation bearing temperature overload or fluctuating condition, should immediately stop production, maintenance of inspection or remove, if badly damaged bearing rollers to change in time, ensure production safety. Internal excess oil and impurities cause analysis: when just start production, running resistance of roller bearing is bigger, oil gathering too much. Processing method: open the bearing end cover side immediately take sample to test, if the metal content in oil paint, then explain the bearing has been wear and tear, to stop production and replacement of the bearing.