How to maximize bearing life

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The service life of rolling bearings theoretically centrifugal pump 20,000 to 80,000 hours, but the actual life depends on many factors - premature bearing failure will lead to high-cost equipment downtime, and sometimes even lead to more serious consequences .
Satisfactory bearing life begins with the correct bearing selection. From the outset, the bearing designer to select the correct bearing for different applications to extend bearing life and equipment performance. This process many factors to consider, such as the load, the hardness, the bearing life prediction, operating environment, and so on.
Correct storage
In principle, all bearings before installation should be preserved in their original packaging. They need to stay in a clean, free of moisture, a relatively constant temperature environment. Rolling bearings should be kept free of dust, water and corrosive chemicals. Shaking and vibration may forever destroy the mechanical properties of the bearing vibration must be avoided in the process of handling and storage.
Basically, all the bearings must be level to save, because the vertical placement of some heavier bearing long time, the deformation may be due to its own weight.
Pre-coated with gre ase (or seal) bearings need to be especially careful, because the grease will change after prolonged storage density. So that when the bearing for the first time use, there will be a certain degree of rotation noise. Therefore, such a bearing shelving control should be based on the first-in, first-out principle.
Clean
Cleaning of rolling bearings is very important. The surface roughness of the rotation surfaces of the bearing ring and the rolling elements is usually 1/10 μm, such a smooth surface is very sensitive to damage caused on contaminants. Rotation between the surface lubricating layer is generally 0.2 ~ 1 μm, the particle type impurity is greater than the lubricant particle diameter will be the excessive rolling elements rolling and produce localized pressure in bearing steel, and will eventually lead to a permanent material fatigue. In addition to this point, the external environment of dust particle sizes up to 10 μm, will damage the bearings. T herefore, a clean and dust-free environment is essential for the storage and installation of the bearing.
Fully prepared to re-install
The bearings should be careful to use the right tool installation and removal. Industry experts estimate that 16% of premature bearing failure cases due to improper installation. Installed in large numbers (e.g., in the production apparatus) is concerned, usually must be strictly controlled conditions installation can also be used a suitable bearing device.
However, in the maintenance or replacement work, the environment is varied. Therefore, in order to ensure the longest service life of the bearings, comprehensive preparatory work necessary to install the bearings.
First, the relevant documents, such as drawings, maintenance manuals, product brochures, etc. need to go through careful study. Next, all bearing components, such as shafts, will be away from the ring, cover, washers, etc. must be kept absolutely clean and fre e from contamination. Adjacent parts of the state should be carefully examined.
Cautious installation and removal
According to the different applications as well as bearing size and type, choose the appropriate installation method (mechanical or hydraulic) and tools. Here is some of the basic principles of the bearing installation:
Do not mounting force is applied to the rolling element, which can easily lead to local overload of the contact surface of the rolling elements and the races leading to premature failure of the bearing.
Do not use any hard tools (such as hammers, screwdrivers, etc.) directly knock on the bearing surface, which will lead to breakage or fragmentation of the bearing ring.
3. Comply with a respected the installation guidance equipment suppliers.
Approximately 90% Rolling never be removed from the device of which they are located, usually only the larger of the bearing to be removed because scheduled preventive maintenance program. And install a bearing, demolition the bearings should carefully prepared, demolition process, to ensure that adjacent components such as shaft and sleeve is not damaged. To select appropriate methods and tools based on bearing type, size, and applications.roller bearing
Designers should be noted that a well designed bearing location can greatly simplify the mounting and dismounting of the bearing, thus reducing maintenance costs.
Proper lubrication
The lubricant may be to isolate the surface of the metal bearing (e.g. rolling elements, the bearing ring and the bearing cover), thus reducing friction, to protect the metal parts as well as the prevention of pollution and impurities. There are a variety of lubricant (grease, oil and solid) available for different operating conditions selected. The correct choice of lubricant is very important to extend the service life of the bearings and equipment.
Because excessive rolling of the rolling members, the bearing lubricant is subjected to lasting mechanical pressure, addition, over time, especially in the environment of high temperature, humidity or contamination, the chemical nature of the lubricant will be changed. All of these have led to a gradual decline of the lubrication quality. Therefore, in order to ensure the longest life, to regularly bearing relubrication. The lubrication intervals depending on the operating conditions, such as temperature, speed, and the environment. Only in the pre-lubricated sealed bearings (also referred to as the "lifetime lubricated bearings) and bearing life depends on lubricant life.
Lubricant must be saved correctly in accordance with the manufacturer s instructions, with particular attention to the lubricant to keep clean from pollution. Before each use, carefully check the quality of the lubricant use stale or contaminated lubricant may cause premature bearing failure.
Condition monitoring / maintenance
In general, the rolling bearing is very reliable, despite their limited life. Machine all other important parts, they should carry out regular inspections and maintenance. Inspection and maintenance of the frequency depending on the importance of the individual application and the operating conditions of the respective devices.
Because the critical bearings role, recommended adding a condition monitoring function in the design stage. Machine running parameters, such as vibration and noise can be continuously monitored and preventive measures before the unpredictable and costly equipment downtime.angular bearing
Training - good practice
Practice makes perfect, but proper training is the basis of practice. The known bearing production Chamber of Commerce offers a variety of training courses for the commercial, techn ical or workshop employees. If the technical staff in the processing bearing process possess basic knowledge, then you can avoid significant errors. Design and product development engineers can optimize the bearing design to maximize equipment performance, minimize life cycle costs.
Bearing is usually an important component in the pump and other equipment, despite the first-class quality of the bearings are very reliable, but to ensure they have the longest life, and still have to pay more attention. The correct preservation careful installation and removal, adequate lubrication and relubrication, correct state monitoring, timely maintenance, and finally, there is improved staff training, are very important to improve the bearing life and equipment performance.