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Sino&Germany (Z&D) taught you to judge the 5th method of the double -column angle contact with the ball bearings failure

Release Time : 2024/01/15 Read：

The application of dual -column -angle contact ball bearing is widely used in the device. The good or bad of the dual -column -angle contact ball bearings is directly related to the running state of the rotating equipment, especially in continuous large manufacturers, and is largely used in important parts of large rotation equipment. Therefore, In actual production, the monitoring and fault diagnosis of dual -column -angle contact ball bearing status is an important part of the maintenance and management of equipment maintenance and management. After long -term practice and exploration, we have accumulated some practical techniques for the actual fault diagnosis of dual -columns to contact the bearing of the ball bearings.

1. The method and main points of the diagnosis of dual -column angle contact with the bearing failure

The practical method of state monitoring and fault diagnosis of dual -column angle contact with the ball bearing is vibration analysis.

Pay attention to the location and collection method of the measuring point. If you want to truly and accurately reflect the vibration state of the double -column angle contact ball bearings, you must pay attention to the accurate and real signal of the collection. Therefore, you must arrange the measuring point at the nearest place to the bearing. There is generally a rear fan cover at the free end of the motor. The fixed screws have a good monitoring effect. In addition, it is necessary to pay attention to multiple collection and analysis of the vibration signal, comprehensively compare. In order to get accurate conclusions.

Second, the characteristics of the normal operation of the dual -column -angle contact of the bearing of the ball bearing

We found in long -term production status monitoring that the dual -column -angle contact ball bearings showed strong regularity during their use, and the repetitiveness was very good. When the normal high -quality bearing is used, the vibration and noise are relatively small, but the spectrum is a bit scattered and the amplitude value is small. It may be caused by some defects in the manufacturing process, such as the surface burrs.

After exercise for a period of time, the vibration and noise remain a certain level, and the spectrum is very single, and only one or twice the frequency appears. There are very few spectrum above three times industrial frequency, and the state of the bearing is very stable and enter the stable working period.

After continuing to run into the post -use period, the bearing vibration and noise begin to increase, and sometimes there are different sounds, but the vibration increases slowly. At this time, the values of the bearing suddenly reach a certain value. We believe that the bearing at this time is the initial failure.

At this time, the bearings are required to be tightly monitored and pay close attention to their changes. Since then, the value of bearing has begun to decline rapidly and is close to normal values, and vibration and noise have begun to increase significantly. Beginning rapidly, when the vibration standard is exceeded, and the steep value exceeds the normal value (the relative standards of steepness can be used), we believe that the bearing has entered the late failure of the failure, and the equipment needs to be replaced in time to replace the dual -column angle contact ball bearings.

The bearing manifestation of the advanced failure characteristics to severe failure (generally bearing damage such as shafts, burns, sand scattering, rolling roads, beads, etc.) for more than a week. The shorter the interval. Therefore, in the actual dual -column angle contact with the bearing fault diagnosis, once the late failure characteristics are found, the bearing should be decisively determined that there is a fault in the bearing, and the maintenance should be arranged as soon as possible.