The theoretical life of rolling bearings in centrifugal pumps is 20,000~80,000 hours, however, the actual life depends on many factors - premature bearing failure can lead to costly equipment stoppages, and sometimes even lead to more serious consequences. move. pk (Austria) bearing experts provide some simple but practical tips for optimizing bearing performance. Satisfactory bearing life begins with the correct bearing. From the very beginning, bearing designers extend the life of bearings and equipment performance by selecting the proper bearings for different applications. This process should take into account many factors such as load, stiffness, bearing life prediction, operating environment, etc. Proper storage In principle, all bearings should be stored in their original packaging prior to installation. They need to be kept clean and moisture free, in a relatively constant temperature environment. Rolling bearings should be kept away from dust, water and corrosive chemicals. Shaking and vibration may permanently damage the mechanical properties of the bearing, so vibration must be avoided during handling and storage. Basically, all bearings must be kept level, because some heavy bearings are placed vertically for a long time, probably due to their own weight and shape. Pre-greasing (or sealing) bearings requires special care, as the grease will change density after prolonged storage. Therefore, when the bearing is used for the first time, there will be a certain degree of rotational noise. Therefore, the timing of such bearings should be controlled according to the principle of first in first out. Cleaning Cleaning is very important for rolling bearings. The rotating surface of the bearing ring and the surface roughness of the rolling elements are usually 1/10 micron, such a smooth surface is sensitive to damage caused by pollution. The lubricating layer on the rotating surface is usually between 0.2 and 1 micron, and impurities larger than the particle size of the lubricant type affect the rolling and excessive local pressure on the bearing steel production of the rolling elements, which will eventually lead to permanent material fatigue. In addition, the dust particle size of the external environment can reach 10 microns, which can damage the bearing. Therefore, a clean, dust-free environment is crucial for storing and installing bearings. Adequate preparation before installation Bearings should be installed and removed carefully using the correct tools. Industry experts estimate that 16% of premature bearing failure cases are due to improper installation. For large equipment (for example) in production units, usually we will strictly control the installation conditions, and appropriate bearing installation equipment can also be used. However, in repair or replacement work, the environment is diverse. Therefore, in order to ensure the longest life of the bearing, thorough preparation of the bearing for installation is necessary. First of all, relevant documents such as drawings, maintenance manuals, product manuals, etc. need to be studied carefully. Next, all bearing components such as shafts, retaining rings, covers, gaskets, etc. must be kept absolutely clean and free from contamination. Neighboring parts of the state should also be scrutinized. Careful Installation and Removal Depending on the application and the size and type of bearing, select the appropriate installation method (mechanical or hydraulic) and tools. Here are some basic principles of bearing installation: 1. Do not put the installed power on the rolling elements, it is easy to cause the contact area between the rolling elements and the valve seat, which may cause overload and premature bearing failure. 2. Do not use any hardware tools (such as hammer, screwdriver, etc.) to directly knock on a bearing surface, which may cause the bearing ring to crack or break. 3. Follow the instructions of the installation equipment supplier with respect. About 90% of rolling bearings are never far from their equipment, usually only the larger bearings are under scheduled preventive maintenance programs. When installing and dismounting a bearing, it is also necessary to carefully prepare the disassembly process to ensure that adjacent parts such as shafts and sleeves are not damaged. Depending on the bearing type, size and application to choose the appropriate method and tool. Designers should note that well-designed bearing locations can greatly simplify bearing installation and removal, thereby reducing maintenance costs. Proper and Proper Lubrication Lubricants isolate metal bearing surfaces (such as rolling elements, bearing rings and bearing cages), thereby reducing friction, protecting metal parts and preventing contamination and impurities. There are various lubricants (oils, oils and solids) that can be chosen for different operating conditions. Proper use of lubricants is very important to prolong the life of bearings and equipment.
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