To use grease correctly, it is necessary to know the movement of grease in timken cylindrical roller bearings. Guarantee the stability of the grease. The movement of the grease filled in the rolling bearing, with the rotation of the timken cylindrical roller bearing, can be roughly divided into two stages. In general, the amount of grease filled in Timken cylindrical roller bearings always exceeds the actual requirement for direct lubrication, on the cage and in the cavity of the bearing cover, and forms a contour on the periphery of the rolling elements . During this process, the bearing temperature rises quickly due to the resistance of excess grease. Although most of the excess grease is squeezed out at the beginning of operation, the grease squeezed in the raceway attachment may still be brought between the raceways by the rotating rolling elements. In the early stage of bearing operation, most of the grease is quickly (less than a minute) out of the raceway, while the accumulated grease is gradually removed by a small amount while circulating with the rotating body of the timken cylindrical roller bearing. discharge. At this time, the bearing degree still continues to rise until the excess grease is completely discharged, which can be called the running-in stage of the grease. According to the quality of the grease in the bearing structure, the filling amount and other factors, this period may last for more than ten minutes. , even hours. After the remaining grease is completely discharged, the remaining small amount of grease forms a thin layer of grease film on the mutual contact surfaces of rolling elements, raceways and cages by the action of sharp wedges, thus entering the normal operation stage of the bearing. . At this time, the temperature gradually decreased and reached an equilibrium state. That is to say, the long-term lubrication is mainly borne by this layer of grease film. In addition, during the long-term operation of the bearing, the grease on the contours near the rolling elements and the raceways and on the cage will shrink to separate a part of the base oil. After flowing between the raceways, it also has a certain supplementary effect on lubrication. . Different greases form different profiles in timken cylindrical roller bearings. It is necessary to form a relatively drafted profile, with short running-in time, low bearing temperature in long-term operation, and stability. This is a kind of It is an ideal grease, so it is especially important for the channeling of the grease. Some so-called eddy current type greases are not, it is not easy to form a contour, and even if the contour is formed, it is easy to collapse. At this time, the excess grease that repeatedly returns to the raceway is in the state of being strongly stirred for a long time, and the torque of the timken cylindrical roller bearing is large. Temperatures are high and unbalanced, noise can occur, and grease is prone to deterioration and loss.
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