The importance of bearing smooth grease stability

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The importance of bearing smooth grease stability

Source: Bearing network time: 2018-01-24

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Correct use of the bearing smooth grease; it is necessary to know the movement of the grease in the bearing to ensure the stability of the smooth grease. The movement of the smooth grease filled in the rolling bearing; followed by the rotation of the SKF bearing; can be roughly divided into two periods .
Right; let's talk about it; when the bearing is smooth; pay attention to the amount of smooth grease. For details, please see the analysis of "SKF bearing smooth grease usage analysis".
Under normal circumstances; the amount of smooth grease filled in SKF bearings; always exceeds the amount of practice required to directly participate in smoothness; in the cavity on the frame and in the bearing cover; and constitutes a generalization on the periphery of the roll. Process Lu; because of the resistance of the remaining smooth grease; the bearing temperature rises quickly. Although most of the remaining smooth grease is squeezed out at the beginning of the work; and the smooth grease squeezed in the raceway attachment can still be transformed into the tumbler belt. Between the inlet and the race. These are during the initial period of the bearing bore; most of the smooth grease is squeezed out of the raceway very quickly (less than a minute); and the accumulated smooth grease is recycled 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 bearing smooth grease is completely discharged; the remaining few smooth greases are on the touch surface of the tumbler, the raceway, and the holding frame; the cusp effect forms a thin layer of smooth grease film; then enters the normal 盍 period of the bearing At this time, the temperature gradually decreases and reaches equilibrium. That is to say; long-term smoothing effect; mainly relying on this layer of smooth grease film to undertake. In addition; in the long-term working process of the bearing; near the rolling body and the raceway In summary and adherence to the smooth grease on the shelf to shrink 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 working hours; 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 grease is otherwise; it is not easy to constitute a generalization; even if it constitutes a generalization, it simply falls; at this time, the remaining smooth grease that is repeatedly returned to the raceway is in a situation of being strongly mixed for a long time; the torque of the bearing is large; the temperature is high; And unbalanced; can also produce noise; smooth fat is also simple metamorphosis and loss.

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