Protect The Ore Milling Equipment Roller Bearings
Grinding roller bearings are the core components of the Ore Milling Equipment and operate in complex environments of high temperature, impact, heavy load and low speed. Therefore, various faults may occur if the maintenance is improper. In particular, the temperature anomalies roller bearings will lead to frequent power failure of the Ore Milling Equipment gate, seriously affecting the production schedule. This article summarizes the common causes of roller bearing temperature abnormalities and treatment methods, hoping to bring everyone’s help.
Lack of lubricant is generally due to the type of lubricant chosen. In general, the working temperature of the roller bearing is relatively high, and the temperature inside the bearing is close to 200°C. If the type of lubricant is incorrect, then the oil used for lubrication will be deteriorated due to high temperature and high pressure or be evaporated, thus losing the function of protecting and lubricating the roller bearing, which will increase the heat generated by the roller bearing friction, Resulting in an abnormal increase in bearing temperature. In addition, if the oil is too small, or replacement is not timely, it is possible to lose its original effect of lubricating oil, resulting in roller bearings can not be fully lubricated, but also make bearing temperature rise and thus lead to premature bearing damage.
In order to ensure the lubrication of grinding roller bearings, the choice of lubricants to try to choose the viscosity and stability at high temperatures, synthetic grease. Whenever the bearings run for four months must be timely replacement of lubricants, and pay attention to each filling can not be less than 40 liters of oil.
The Inner Bearing Of The Grinding Roller Enters A Large Amount Of Powder
If a large number of internal bearing into powder, the powder and the lubricating oil will be bonded together, become viscous and poor liquidity of powder and oil mixture, not any lubrication of bearings, bearing wear will increase, making the temperature different roller bearings often rise.
When the powder enters the bearing and causes the abnormal temperature rise of the bearing, it is necessary to immediately replace the oil seal and check the quality of the lubricant so as to ensure that it does not deteriorate. If the powder accumulated inside the bearing is too much, and the powder oil mixture can not be discharged along with the oil outlet, then the inner end cover of the bearing can be opened, and the powder oil mixture is discharged by adding compressed air or by adding hydrogen, and then the new lubricating oil is added.
Seal System Damage
The sealing wind system is the key link to ensure that the oil seal of the roller is not damaged. The airtight wind system is composed of a seal fan and a air duct. The blowing wind starts from the airtight blower and ends up in the airtight duct. The grinding roll installed on the grinding disc of the Ore Milling Equipment seals the air into space. This can form a circular seal cleaning system, not only to ensure that the powder does not enter the roller bearing, but also prevents the powder from damaging the oil seal. All sectors are closely linked, are indispensable, if any part of a problem, there is air leakage or debris, will cause the air pressure sealing ring is reduced, air flow is inadequate, so the circular air sealing system can not be formed, which in turn caused the damage of the oil seal, bearing temperature rise, powder into a series of the situation.
When the abnormal increase of roll temperature, should immediately stop production and investigation, from the seal fan, along the wind direction checking step by step, to plug the loopholes, blocking and unblocking. Because the working environment of the Ore Milling Equipment is very bad, and the long-term and large amount of powder is accompanied, the fan filter screen is easy to be blocked. Therefore, technicians should clean up as much as possible, and try to do it half a month. And because the temperature of the working environment is high, the air duct is prone to soften or deform or leak. It should be checked in half a month, and it will be killed in the cradle.
Local Damage Of Roller Bearing
The roller bearing pays special attention to the quality of the bearing, but the phenomenon of local damage will occur in the long run, such as the wear of the ball, the loosening of the interface and so on. At this point, the temperature of the roller bearing must be abnormal.
When the roller bearing surface roughness, local rotation is blocked, swing to increase internal noise; instant or boot operation in the Ore Milling Equipment bearing temperature occur overload or fluctuate, should immediately stop production, repair or disassembly inspection, if serious damage to the timely replacement of roller bearing, ensure the production safety.
The Internal Fat Is Too Much And Has Impurities
In the production of the rigid machine, the running resistance of the roller bearing is relatively large and the oil is too much.
Immediately open the bearing side cover and take the oil sample for testing. If the metal content in the grease exceeds the standard, it means that the bearing has been worn out, and it is necessary to stop production and replace the bearing.