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How to inspect and measure SKF bearings and common maintenance methods

by:JNSN     2022-03-14
1. Preparations before installing SKF bearings 1) Preparation of bearings Because the bearings are rust-proof and packaged, do not open the package before the installation. Next, check whether the size, shape and processing quality of the shaft and the casing match the drawings. 2) Before the bearing of the inspection device of the shaft and the casing, apply mechanical oil to the mating surfaces of the shaft and the casing that have passed the inspection. In addition, the anti-rust oil coated on the bearing has good lubricating performance, and the bearing for general use or the bearing filled with lubricating grease can be used directly without cleaning. But for instrument bearings or bearings used for high-speed rotation, use clean cleaning oil to wash off the anti-rust oil. At this time, the bearings are easy to rust and cannot be left for a long time. Clean the bearing and housing to make sure there are no scratches or burrs from machining. There must be no abrasives (SiC, Al2O3, etc.), sand, chips, etc. in the housing. 2. How to install SKF bearings In most cases, we found the possible causes. Generally speaking, one-third of the bearing damage is caused by fatigue damage, the other one-third is caused by poor smoothness, and the other One third is due to contamination entering SKF bearings or improper disposal of the device. In order to reduce bearing damage, SKF bearings must be paid attention to: 1. When using the device, it must be installed carefully and accurately. Like the requirements of other bearings, strong stamping is not allowed, and it is not allowed to directly hit the bearing with a hammer. It is allowed to transmit pressure through the rolling element 2. As the saying goes, no sand can be rubbed in the eyes, and the bearing and its surrounding environment should also be kept clean. I don't need to tell you what's going on. Even if the dust that is invisible to the naked eye enters the bearing, it will wear the bearing. 3. Use appropriate and accurate installation tools, try to use special tools, and try to avoid the use of cloth and short fibers. 4. When taking the bearing by hand, it is necessary to thoroughly wash off the sweat on the hands, and apply high-quality mineral oil before stopping the operation. In the rainy season and summer, special attention should be paid to rust prevention. We all know that SKF bearings are fine parts, and they are used in It is required to have a very cautious attitude, that is, the use of high-performance bearings, if used improperly, it will not achieve the expected performance effect, and it is easy to damage the bearings. Most SKF bearings fail for many reasons - exceeding the original estimated load, ineffective sealing, too small bearing clearance caused by too tight fit, etc. Each of these elements has its own specific damage pattern and leaves specific traces of damage. 3. There are several types of SKF bearing maintenance in general. 1. Regular maintenance: In order to ensure the normal operation of the main engine, a maintenance cycle is set and regular maintenance is set according to the request of the main engine and the design theory and application experience of the bearing. 2. Fault maintenance: When the bearing fails, stop the machine for inspection and maintenance. 3. Early warning maintenance: using advanced bearing fault diagnosis technology, real-time monitoring of the bearing's operating status, advance warning before bearing failure occurs, and maintenance. During the operation of the bearing, there must be phenomena such as sound, temperature and vibration. Therefore, for the maintenance and maintenance of the bearing in operation, abnormal changes of the bearing can be found by listening, touching, viewing, and using bearing fault diagnosis equipment, and whether the SKF bearing is in normal working state can be judged according to the state of the change.
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