Analysis of the damage degree of TIMKEN bearing

Check the condition of the oil seal near the TIMKEN bearing to ensure that they are sufficient to prevent hot liquids, corrosive liquids and gases from penetrating into the bearing along the shaft. If the oil seal is damaged, replace it as soon as possible. Check the automatic lubrication system to ensure that the oil or grease enters the bearing and ensure that the correct amount is added and that the lubricant is discolored or blackened. If this is the case, it usually means that the lubricant contains impurities. It is also harmful.

Through the fault and deterioration of TIMKEN bearings, the performance state parameters to judge and predict the reliability and performance of the bearing, identify and judge the location, cause and degree of danger of the abnormal situation, and determine the comprehensive technology of repair and improvement methods. Therefore, the fault diagnosis technology of the bearing is not a simple fault detection (or monitoring) technology, nor is it a simple inspection instrumentation. Acquire signals correctly, quickly and efficiently, data processing, manual or automatic identification and judgment. In order to determine the scientific repair cycle, the necessary tests and estimates of fatigue and wear life should be performed according to the mechanism of various failures.

The judgment of whether TIMKEN bearings are available is mainly determined by considering the degree of bearing damage, mechanical properties, importance, operating conditions, and the period of next maintenance. If you have the following defects, you can no longer use them and you must replace them with new ones. There is a crack or a gap in any of the inner ring, the outer ring, the rolling element, and the cage.

1. There is a break on either the ferrule or the rolling element.

2. There are significant card injuries on the rolling surface, the ribs and the rolling elements.

3. The cage is worn significantly or the rivet is significantly slack.

4. There is rust on the raceway surface and rolling elements, and there is injury.

5. There are serious indentations and marks on the raceway surface and rolling elements.

6. There is obvious creep in the inner diameter surface of the inner ring or the outer diameter surface of the outer ring.

7. The discoloration caused by heat is obvious.

8. The TIMKEN bearing sealed with grease has obvious damage to the sealing ring or dust cover.

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KOYO bearing inspection, temperature, precautions for use

1. The small machine can be rotated by hand to confirm whether the rotation is smooth. The inspection items have poor operation due to foreign matter, scratches, and indentations. The installation is poor, the torque generated by the mounting is not stable, and the torque is too large due to too small clearance, installation error, and sealing friction. Wait. If there is no abnormality, the power running can be started. Large machinery cannot be rotated manually, so the power is cut off immediately after the start of the no-load, the machine is idling, and the presence or absence of vibration, noise, and contact of the rotating parts is checked. After confirming that there is no abnormality, the power is turned on. The power running starts from the no-load low speed and slowly increases to the rated operation of the specified conditions. The items to be checked during the test run are whether there is abnormal sound, KOYO bearing temperature change, lubricant leakage or discoloration, etc. If an abnormality is found, stop the operation immediately, check the machine, and remove the bearing check if necessary.

2. Bearing temperature can generally be estimated based on the external temperature of the bearing housing. However, it is more accurate to directly measure the temperature of the KOYO bearing outer ring by using the oil hole. The bearing temperature gradually rises from the start of the operation, and the temperature is usually stable after 1 to 2 hours. If the bearing is poorly installed, the temperature will rise sharply and an abnormally high temperature will occur. The reasons are such as excessive lubricant, too small bearing clearance, poor installation, excessive friction of the sealing device, and the like. In the case of high-speed rotation, the selection of the bearing structure and the lubrication method is also the cause. The rotation of the bearing is checked with a stethoscope, etc., and there are strong metal noise, abnormal sounds, irregular sounds, etc. to explain the abnormality. The reasons are poor lubrication, poor accuracy of the shaft or housing, bearing damage, and foreign matter intrusion.

3, from the reasons of use and internal factors to see the reasons for the effectiveness of the bearing, the use of factors mainly depends on whether our method of use is reasonable, the internal factors are actually the level of our choice when choosing KOYO bearings! !

The use factors mainly refer to whether the installation adjustment, use and maintenance, maintenance and repair, etc. meet the technical requirements. The installation condition is one of the primary factors in the use factor. The bearing is often changed due to improper installation, and the force state between the parts of the whole bearing changes, and the bearing runs in an abnormal state and fails early. According to the technical requirements of bearing installation, use, maintenance and maintenance, monitor and check the load, speed, working temperature, vibration, noise and lubrication conditions of the bearing in operation, find out the cause and immediately adjust the cause, make adjustment Back to normal. In addition, it is important to analyze the quality of the grease and the surrounding medium and atmosphere.

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