Judgment skills of bearing damage degree

It is a comprehensive technology for judging and predicting the reliability and performance of bearings through the failure and deterioration of imported bearings and performance state parameters, identifying and judging the location, cause and danger of abnormal conditions, and determining repair and improvement methods. Therefore, the fault diagnosis technology of bearings is not a simple fault detection (or monitoring) technology, nor is it a simple point inspection instrumentation. Accurately, quickly and effectively collect signals, process data, identify and judge manually or automatically. In order to determine the scientific repair cycle, the necessary tests and estimates of the fatigue and wear life should also be carried out according to the mechanism of various failures. Judging the degree of damage to the bearing in use can be determined by listening, touching and observing.

1. Listening: A very common method of using hearing to identify irregular movements. For example, using a screwdriver or electronic stethoscope to detect a simplified abnormal noise is a method often used by experienced operators and maintenance personnel. If the bearing is in a good running state, it will emit a low whine sound, such as sharp hissing, squeaking and other irregular sounds from the SKF bearing, which may indicate that the imported bearing has been in poor operation. in status.

2. Touch: High temperature often means that the imported bearing is in an abnormal condition. High temperature is also harmful to the lubricant in the bearing, but the high temperature of the bearing is caused by the lubricant in the imported bearing. Long-term operation at temperature will reduce bearing life. The reasons for the high temperature of the bearing are insufficient or excessive lubrication, impurities in the lubricant, excessive load, damage to the bearing, insufficient clearance, and friction caused by the oil seal. Under normal circumstances, the bearing will have a natural temperature rise just after lubricating or after lubricating and it will last one to two days.

3. Observation: If the bearing is well lubricated and there is no sundries and moisture entering, it indicates that the oil seal of the bearing is not worn. If the original imported bearing box is opened, the bearing should be checked visually and the oil seal should be checked regularly. Check the condition of the oil seals near the bearing to ensure that they are sufficient to prevent hot liquids, corrosive liquids and gases from penetrating the bearing along the shaft. If the oil seals are damaged, they should be replaced as soon as possible. Check the automatic lubrication system to ensure that the oil or grease enters the imported F bearing, and ensure the correct amount to be added. Also check whether the lubricant is discolored or blackened. If this happens, it usually means that the lubricant contains impurities, which is very harmful to the bearing. use is also harmful.

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