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The effect of smooth grease on the life of KOYO bearing
Source: China Bearing Network Time: 2013-11-17
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The metallurgical quality of imported bearing data was once the primary factor affecting the early failure of rolling bearings. Following the advancement of metallurgical skills (such as vacuum degassing of bearing steel); the quality of the original data was improved. The original data quality factors accounted for the bearing failure analysis. The proportion has been significantly reduced; but it is still one of the primary influencing factors of bearing failure. Whether the selection of materials is still appropriate is still an essential element for bearing failure analysis.
The bearing is usually produced through multiple processing steps such as casting, heat treatment, turning, grinding and installation. The rationality, advancement and stability of each processing process will also affect the bearing life. The heat treatment that affects the bearing quality of the product. And the grinding process; often has a more direct relationship with the failure of the bearing. In these years, the research on the surface of the bearing operation is marked; the grinding process is closely related to the quality of the bearing appearance.
The primary task of KOYO bearing life analysis is based on a lot of set data, analysis data and failure modes; find out the primary factors that constitute bearing failure; in order to propose improvement methods in an aligned manner; extend the service life of bearings; prevent bearings Sudden early failure.
Under normal circumstances; the smooth grease filling in KOYO bearings; always exceeds the amount of practice required to directly participate in smoothness; in the cavity of the holder and the bearing cover; and constitutes a generalization on the periphery of the roll. In the process; because of the resistance of the remaining smooth grease; the bearing temperature rises quickly. Although most of the remaining smooth grease is extruded at the beginning of the operation; and the smooth grease squeezed in the raceway attachment can still be transformed into the tumbling belt. Between the inlet and the runner. These are during the initial period of operation of the bearing; most of the smooth grease is squeezed out of the raceway very quickly (less than a minute); and the accumulated smooth grease is circulated along with the bearing transition body; It is discharged. At this time, the bearing temperature continues to rise; until the remaining bearing smooth grease is completely discharged; it can be called the smooth grease during the running; according to the bearing layout, the smooth grease quality, the filling amount and other factors; Continue for ten minutes; even hours.
After the remaining KOYO bearing smooth grease is completely discharged; the remaining few smooth grease on the touch surface of the roll body, the raceway, and the holding frame; the sharp tip effect constitutes a thin layer of smooth grease film; then enters the normal operation of the bearing During this period, the temperature gradually decreases and reaches equilibrium. That is to say; long-term smoothing effect; firstly, relying on this layer of smooth grease film to undertake. In addition; in the long-term operation of the bearing; near the rolling body and the raceway In general, and the smooth grease on the shelf is shrunk to separate a part of the base oil; after flowing into the raceway; there is also a certain compensation effect on smoothness.
Different bearing smooth greases are not the same in the general composition of the bearing; it must be composed in a general analogy; the running time is short; the bearing temperature is low during long hours of operation; and it is stable; this is a kind Smoother than the ambition; so it is especially important for the smoothness of smooth fat.
Some so-called eddy-type smooth greases are otherwise; it is not easy to constitute a generalization; even if the generalization is simply collapsed; then the remaining smooth grease that is repeatedly returned to the raceway is in a mixed state for a long time; KOYO bearings have large torque; high temperature And unbalanced; noise can also occur; smooth grease is also simply metamorphosed and lost.
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