It is inevitable that there is abnormal state during the bearing operation. Our common abnormalities are mainly noise, abnormal temperature rise, large vibration (beating of the axis) and the leakage of lubricants, and other factors. What are the specific reasons for abnormal state? How to deal with these abnormalities after these abnormalities. China Bearing Network makes detailed answers.
1. Bearing noise
If the bearing is in a good consecutive state, it will make a low whine or buzzing sound. If a sharp hissing, squeak, and other irregular sounds are emitted, it often indicates that the bearing is in a bad connection condition. The sharp squeak noise may be caused by inappropriate lubrication. Inappropriate bearing gaps can also cause metal sounds.
The main three cases of bearing noise are: large metal noise, rules noise and irregular noise.
1. Large metal noise
The main causes of large metal noise caused by bearing are abnormal loads, poor installation, insufficient lubricants, and inadequate contact with rotating parts.
Countermeasures that cause bearing abnormal loads: correction and cooperation, study the bearing gap, adjust the pre -load, and correct the shell to block the shoulder position.
Countermeasures leading to poor bearing installation: processing accuracy of shaft and shell, improving installation accuracy, and installation methods.
Countermeasures that cause insufficient bearing lubricants: supplement the lubricant and choose the appropriate lubricant.
Causes the bearing rotation parts with contact: Modify the contact part of the tune sealing.
2. The noise of the rules
Sometimes the bearing will occur during operation, "呲-呲, intermittently, and regular occurrence". This is the noise of the rules. Rust, scars, (after steel carburizing), surface deformation and roller surface breaks.
Bearing countermeasures caused by foreign matter rolling surfaces to generate indentation, rust, and scars: Replace the bearings, clean the relevant parts, improve the sealing device, and use a clean lubricant.
Countermeasures for the surface deformation of the bearing (after steel carburizing): replace the bearings and pay attention to its use.
Countermeasures that cause the bearing rolling road surface: Replace the bearings
3. Irregular noise
For example, "squeak, irregular sounds, and no sound of changes in the speed of rotation will occur during the bearing operation. The main: excessive gap, foreign body invasion and damage and break.
Countermeasures leading to the excessive gap of the bearing: Study in cooperation and bearing gaps to modify the pre -load volume.
Countermeasures for the invasion of foreign objects in the bearings: Study replacement of bearing, cleaning related parts, improved sealing devices, and using clean lubricants
Countermeasures of bearing ball damage or break: Replace the bearings.
Second, the temperature of the bearing abnormality rises
After the starting operation, the bearing will be warmed up. After a period of time, it is running at a lower temperature (usually 10-40 degrees higher than the room temperature).
It belongs to normal, and the bearings can also be different according to the size of the size. In the middle, when the bearing temperature does not reach the normal warming, we will consider the bad factors.
1. Too much or too little lubricant
Countermeasures: Reduce or supplement the lubricant, use it in moderation, and regularly change the bearing to the bearing to change the lubricant or grease, and select the harder grease.
2. The lubricant is not suitable
The lubricant of the bearing does not meet the requirements or is contaminated. The selection of lubricating oil is not appropriate. It is not easy to form uniform lubricating oil film. It cannot reduce the internal friction and wear of the bearings, insufficient lubrication, and increased the temperature of the bearings.
Countermeasure: The appropriate lubricant should be selected for bearings.
3. Disposter load
Countermeasures: Modify and cooperate, study the gap of the bearing, and adjust the pre -load to modify the outer shell to block the shoulders.
4. Poor installation
Improper installation is another important reason for the heating of the bearing. Because the bearing installation is correct or not, it has a direct impact on its life and the accuracy of the host. Therefore, it is required that the shaft must be overlapped with the central line of the bearing hole during installation.
Countermeasure: Improve the processing accuracy, installation accuracy, and installation method of the shaft shell.
5. Cooperate with the creep, the sealing device rubbing too much
Countermeasures: Replace the bearings, study cooperation, modify the shaft shell, and change the form of sealing device.
Third, vibration (beating of axis)
The main causes of bearing vibrations are four reasons: (after steel carburizing) surface deformation, break, poor installation, and foreign body invasion.
(After the steel carburizing) Surface deformation countermeasures: Pay attention to bearing exchange and operation.
Countermeasures of bearing break: Replace the bearings.
Poor countermeasures for bearing installation: Modify the straight angle of the shaft, the shell block the right angles, and the side of the pad.
Countermeasures of bearing foreign objects: Replace the bearings, clean parts, improve sealing devices, etc.
For example, poor craftsmanship does not meet the requirements. The rotor is moving and unbalanced, the foundation is poor, the foot of the foot is deficient, the rotation stagnation and asthma. Some rotor During the operation, due to the corrosion of the medium or the wear of the solid impurities, or the bending of the axis, it will cause unbalanced centrifugal force, which causes the bearing to heat and vibrate, and the roller is severely worn until it is damaged.
Fourth, lubricant leakage, discoloration
The cause of leakage and discoloration of the bearing lubricant is: too much lubricant, friction powder in foreign body invasion, etc.
Countermeasures: Use the lubricant in moderation, study and change the choice of lubricants, study the replacement of the bearings, and clean the shell.