First, determine the best time for bearing repair

Rolling bearings work to what state into repair is the best, which should be judged from the damage law and characteristics of bearings. The damage of the most used small and medium-sized bearings is usually mainly caused by fatigue and excessive wear of rings or rolling bodies. When the rolling surface of the bearing enters the third stage of wear, or there has been pitting and peeling, the bearing will soon tend to fail. At this time, the damage of the raceway surface has been very serious, it is difficult to repair, or it has lost its repair value.

However, before the above stage, bearing wear is relatively slight, and fatigue may occur only in the depth of a few microns to dozens of microns below the surface layer of the rolling surface. Therefore, when the bearing is reported for repair at this time, better repair effect can be obtained at a small cost. In short, the repair period of rolling bearings is the most appropriate when the bearings have worked for a long period of time, have been fully utilized, and enter the repair before the damage appears.

Second. Determination method of bearing repair reporting time

The specific judgment method of whether the bearing should be repaired, that is, the bearing has been fully utilized and the adjacent damage appears, is as follows:

1) Use the bearing working state monitoring instrument

It is the most convenient and reliable method to judge the working state of bearings and decide when bearings should be repaired by using such instruments as ferrospectrometers or SPM or I-ID-1 bearing working condition monitoring instruments. The.

For example, when using HD-1 instrument, when the pointer is close to the danger zone from the warning zone, and when the pointer does not return after taking measures such as improved lubrication, it can be determined that the bearing itself is a problem. At this time, the bearing can be reported for repair when it has not yet entered the danger zone. How far from the danger zone to start repair can be adjusted by experience.

The use of such instruments, can make full use of bearing potential, timely bearing repair, and can avoid the occurrence of failure, is safe and economic.

2) Use simple tools to monitor

In the absence of the above instruments, the operator can hold a round rod or wrench and other tools that conflict with the machine shell part closest to the bearing, and listen to the bearing running sound transmitted by the tool on the ear, of course, the use of a medical stethoscope can also be modified.

Normal bearing running sound should be uniform, smooth and not harsh sound, while abnormal bearing running sound has all kinds of intermittent, impact or harsh sound. First of all, we should get used to the normal bearing running sound, and then we can grasp and judge the abnormal bearing running sound, and then through the accumulation of practical experience, we can further analyze what kind of abnormal sound corresponds to what kind of abnormal bearing phenomenon.

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