2013年8月22日星期四

How to prolong the service life of bearings?




Theoretically centrifugal pump service life of rolling bearings NSK 20,000 to 80,000 hours, however, the actual life depends on many factors - NSK Bearings premature failure will lead to consideration of the high equipment downtime, and sometimes even lead more serious consequences. NKE (Austria) company NSK Bearings expert provides some simple but practical NSK Bearings performance optimization techniques.
    Satisfactory life begins NSK tapered bearing NSK Bearings correct choice. From the outset, NSK bearings for different applications through designers select the right NSK Bearings NSK Bearings to extend equipment life and performance. This process should consider many factors, such as load, hardness, NSK bearings life prediction, operating environment and so on.
    Correct storage
    In principle, all NSK bearings prior to installation should be kept in their original packaging. They need to stay in a clean, moisture free, relatively constant temperature in the environment. Rolling NSK Bearings should stay away from dust, water and corrosive chemicals. Shaking and vibration may forever destroy the mechanical properties of NSK bearings, so the handling and storage process must avoid vibration.
    Basically, all levels of NSK bearings have to be saved, because some heavier NSK Bearings long vertically, it may be deformed due to its own weight.
    Pre-coated with grease (or sealed) NSK bearings need to be careful, because the oil after a long period of storage after the density change. NSK bearings so that when the first time, there will be a certain degree of rotation noise. Thus, the NSK bearings aside time should be controlled according to the FIFO principle.
    Clean
    Clean the rolling NSK bearings is very important. NSK Bearing ring rolling surface and the rolling elements of the surface roughness is typically 1/10 μm, such a smooth surface of pollutants are very sensitive to damage. A lubricating layer between the rotating surface is generally 0.2 ~ 1 μm, a particle size larger than the lubricant-type impurity will be rolled over the rolling element bearings in the NSK partial pressure produced in steel, fatigue will eventually cause permanent. In addition to this, the external environment in the dust particle size of up to 10 μm, NSK bearings will also cause damage. Therefore, clean dust-free environment for NSK Bearings storage and installation is critical.
    Fully prepared to install
NSK Bearings should carefully using a suitable tool installation and removal. Industry experts estimate that premature failure of NSK Bearings 16 percent of cases are due to incorrect installation. For large installations (for example in the production of the device) is concerned, usually installed strictly controlled conditions, you can use the appropriate NSK bearings installed equipment.
However, in the maintenance or replacement work, the environment is varied. Therefore, to ensure the longest life of NSK bearings, comprehensive preparatory work on NSK Bearings installation is necessary.
First, the relevant documents, such as drawings, maintenance manuals, brochures and other products require careful study. Next, all NSK Bearings components, such as shafts, the distance ring, cover, washers, etc. must be kept absolutely clean and free from contamination. Adjacent parts of the state should be carefully examined.
Careful installation and removal
According to the different applications and NSK Bearings size and type, choose the appropriate installation method (mechanical or hydraulic) and tools. Here is the NSK bearings installed some basic principles:
1 Do not install the force applied to the rolling elements, which can easily lead to the rolling element and the contact surface of the seat of local overload, leading to premature failure of NSK bearings.
(2) Do not use any hard tools (such as hammers, screwdrivers, etc.) directly to knock on the surface of the NSK bearings, NSK bearings which can cause breakage or fragmentation rings.

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