In order to extend the service life of the bearing, it is necessary to focus on industrial SKF bearings maintenance, repair order to prevent accidents in the first place, to ensure the reliability of operation, improve productivity and economy. Best maintenance the corresponding mechanical operation conditions operating standards, regular basis. The content includes monitoring the operation state, the supplement or replace the lubricant, a periodic disassembly inspection. As the the maintenance matters operation, rotation of the bearing sound, vibration, temperature, state of the lubricant, etc..
1, the cleaning of the bearing: Removing the lower bearing overhaul, the first record bearing appearance, confirm the remaining amount of lubricant, lubricant sample check, wash bearings. As a cleaning agent, general use gasoline, kerosene. Remove the bearing cleaning, coarse cleaning and fine cleaning, respectively, on the container, put the metal mesh bottom, bearing no direct contact with the dirt of the container. Coarse cleaning, if the bearing rotation, with dirt will damage the bearing rolling surface, it should be noted. Crude oil cleaning, use a brush to remove grease, adhesive material, generally clean, transferred sperm washing. Sperm washing is the bearing while rotating in the cleaning oil, cleaning it thoroughly. In addition, cleaning the oil should be kept clean.
2, bearing maintenance and judgment: In order to determine whether the removed FAG bearings can be used to check the bearings cleaned. Check the raceway, the raceway, with the surface state of the cage wear, increased bearing clearance and of irrelevant dimensional accuracy decline damage exception. Non-separable type of small ball bearings, the inner ring with one hand, the level of support, rotating outer ring to confirm whether smooth. Tapered roller bearings and other separation-shaped bearings, rolling elements, the outer ring raceway surface were examined. The large bearing because they can not hand rotation, pay attention to check the rolling element and raceway, to maintain the appearance of the rack, wall surface, the importance of bearing the higher the greater the need for careful inspection.
3, the purpose of bearing lubrication: lubrication of rolling bearings purpose is to reduce the bearing internal friction and wear, to prevent burning stick, the lubricating effect.
(1), reducing friction and wear. Mutual contact portions constituting the bearing rings, rolling elements and cage, to prevent metal-to-metal contact, reducing friction and wear.
(2), extended fatigue life. NSK Bearings rolling fatigue life, in rotation, good lubrication of rolling contact surface is extended. On the contrary, the viscosity of the oil is low, the thickness of the lubricant film is good, is shortened.
(3), discharging the friction heat and cooling. Cycle oil law and oil discharge heat generated by friction or heat coming from the external cooling. Prevent bearing overheating prevent the lubricant own aging.
(4) Others: prevent foreign material from entering the interior of the bearing, or to prevent rust, corrosion effect. Lubrication: the bearing lubrication method, divided into grease and oil lubrication. In order to make a good bearing play function, first, to select suitable conditions, the use of the purpose of lubrication method. If only consider lubrication, oil lubrication dominant. However, the grease around the bearing structure of expertise can be simplified, compare the pros and cons of grease and oil lubrication.
4, bearing installation: the installation of the bearing is correct, affecting the accuracy, longevity, performance. Therefore, the design and assembly departments installation of the bearing to be adequately studied. I hope to be installed in accordance with operating standards. Operating standards projects usually are as follows:
(1), cleaning bearings and related parts;
(2) Check the connected components of size and finishing;
(3), the installation;
(4), the installation after inspection of the bearings;
(5), the supply of lubricant.
5, shortly before installation, just open bearings packaging. General grease lubrication, cleaning, filling the grease directly. Lubricating oil, Common also do not have to clean, however, the instrument used or the use of high-speed bearings, etc., use of clean oil washed to remove the anti-rust agent coated on the bearing. Remove the bearing of rust inhibitor, rust, and so can not be placed regardless. Furthermore, the grease-enclosed bearing, used directly without cleaning.
6, the method of installation of the bearing, the bearing structure, with the condition varies, ships, since the multi-axis rotation, the inner ring needs interference fit. Cylindrical bore bearings, multi-purpose pressed into the press, or hot charging method. Taper occasions, installed directly on the taper shaft or sleeve installation.
7, when mounted to the housing, the general clearance fit, and the outer ring with the amount of interference, usually pressed into the press or shrink fit method installed after the cooling. With a dry ice as coolant, shrink fit the occasion of the installation, the moisture in the air condenses on the surface of the bearing. So, you need the appropriate anti-corrosion measures.