Introduction to the Maintenance and Lubrication Method for Reducing Noise of FAG Cylindrical Roller Bearings

In order to judge whether the disassembled fag bearing can be used, it should be checked after the cylindrical roller bearing is cleaned. Check the state of the raceway surface, rolling surface, mating surface, the wear condition of the cage, the increase in bearing clearance, and the damage and abnormality irrelevant to the drop in dimensional accuracy. For non-separable small ball bearings, use one hand to support the inner ring and rotate the outer ring to check whether it is fluent. Bearing maintenance: Cleaning of cylindrical roller bearings: When disassembling the bearing for maintenance, first record the appearance of the cylindrical roller bearing, confirm the residual amount of lubricant, and wash the bearing after sampling the lubricant for inspection. As a cleaning agent, gasoline and kerosene are generally used. In the fag bearing industry, the use of this type of grease is the largest in high-speed wire mill bearings, accounting for about 70% of the total amount of grease used. Because this type of grease uses lithium white, which is soft and difficult to filter, as thickener, and uses mineral oil as the basic oil, it is very difficult to know the requirements for reducing vibration value of low-grade cylindrical roller bearings outside the feet. Another advantage is that it has excellent pumpability, whether it is mechanical greasing or manual greasing, it is simple and difficult to do. Moreover, the price of the grease is low, which can greatly reduce the cost of bearings. However, due to the use of mineral base oils, this type of grease has a great effect on some physical and chemical goals other than rust removal and rust prevention. If the bearing life can only reach 200 hours, the linear guide is a common problem. There is no problem when starting and running torques are tested at -20°C. This type of grease is generally used at a temperature of -20 to 120 °C. When it is used at a high temperature above 150 °C, the basic oil will evaporate too quickly and run off seriously, which greatly shortens the service life of fag bearings. At present, the equipment using fine bearings is becoming more and more refined, so that the grease used in fag bearings must have the following functions: (1) have the same operating life as fag bearings, try to delay the maintenance cycle, shorten downtime, and improve labor productivity . (2) At the high speed of dn>5×105, it is necessary to ensure that the temperature rise of the motor is low, and the oil is not thrown, thereby reducing power consumption and protecting the motor. (3) Its pure content is controlled under certain standards, which minimizes the pollution of equipment noise to the environment. (4) Under the premise of ultra-low temperature work, the fag bearing is guaranteed to start and run smoothly, and the common problems of skf bearing. Guaranteed minimum output power. The cleaning of the disassembled cylindrical roller bearing is divided into coarse cleaning and fine cleaning, which are placed in the container respectively, and the bottom of the metal mesh pad is placed first, so that the bearing does not directly contact the dirt of the container. During rough cleaning, if the fag bearing is rotated with dirt, it will damage the rolling surface of the cylindrical roller bearing, so you should pay attention. In the coarse cleaning oil, use a brush to remove the grease and sticky substances. After it is roughly clean, it is transferred to the fine cleaning.

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