Correct use of TIMKEN bearing grease for the cause of the sound

In general, the amount of grease in the TIMKEN bearing always exceeds the actual amount of lubrication directly involved in the lubrication, on the frame and in the cavity of the bearing cover, and forms a contour on the periphery of the rolling element. During this process, the bearing temperature rises rapidly due to the resistance of the excess grease. Although most of the excess grease is squeezed out at the beginning of the run, the grease that is squeezed into the raceway attachment may still be carried by the rolling element into the raceway. In the early stages of the bearing, most of the grease is squeezed out of the raceway very quickly (less than a minute), and the build-up grease is discharged a small amount while circulating along with the bearing rotor. At this time, the bearing temperature will continue to rise until the excess grease is completely discharged. It can be called the grease's walking phase. According to the grease quality and filling amount in the bearing structure, this time may last for ten minutes. Even a few 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 surface of the rolling element, the raceway and the cage, thereby entering the normal stage of the bearing. . At this time, the temperature gradually drops and reaches equilibrium. In other words, long-term lubrication is mainly borne by this layer of grease film. In addition, during the long-term operation of the bearing, the contour of the rolling element and the raceway and the grease on the cage are shrunk to separate a part of the base oil, and after flowing into the raceway, the lubrication is also supplemented. .

The type of lubricating oil or grease is not selected correctly (choose the right one to achieve the best results)

TIMKEN bearings are mixed with moisture, acid or paint, which acts as a corrosive agent.

The TIMKEN bearing is flattened by the seat hole (the roundness of the seat hole is not good, or the seat hole is not twisted straight)

The horn of the bottom surface of the TIMKEN imported housing is not flat (resulting in deformation of the seat hole or even cracks in the TIMKEN bearing housing)

There are debris in the hole of TIMKEN bearing housing (residual chips, dust particles, etc.)

The clearance of the TIMKEN bearing is too small, and the rotation is too tight (the tightening sleeve is too tight)

Insufficient lubrication (oil level is too low, oil or grease leaks through the seal)

The clearance of the TIMKEN bearing is too small (the selection is not appropriate)

The seal is eccentric (touching adjacent parts and rubbing)

TIMKEN bearings are subject to additional loads (TIMKEN bearings are axially tightened, or two fixed ends TIMKEN bearings on one shaft)

The TIMKEN bearing and the shaft are too loose (the diameter of the shaft is too small or the adapter sleeve is not tightened)

TIMKEN bearings are mixed with impurities such as sand or carbon particles to act as an abrasive.

The diameter of the seat hole is too small (causing the TIMKEN bearing temperature to be too high)

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