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Eight Factors For FAG Bearing Heating

Source:  skf bearing  Time:  2021-08-03

There are many reasons that cause the FAG  bearing temperature to be too high. ERIC BEARING LTD has sorted out several common problems for everyone.


1. Poor lubrication


Lubrication has an important impact on the service life of the bearing and friction, wear, vibration, etc. Good lubrication is a necessary condition to ensure the normal operation of the bearing. According to statistics, about 40% of bearing damage is related to poor lubrication.


The main effects of lubrication on bearings include:


1) Prevent metal corrosion.


2) Prevent the intrusion of foreign matter and play a sealing role.


3) Discharge the frictional heat to prevent excessive temperature rise of the bearing.


4) Reduce friction and wear and extend bearing life.


The factors that usually cause poor bearing lubrication are:


1) Lubricating oil (grease) is insufficient.


2) The lubricating oil pipe is blocked by foreign matter, etc.


3) The quality of lubricating oil (grease) is defective.


4) Lubricating oil (grease) is not added on time.


5) The lubricating oil (grease) contains impurities.

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2. Bearing wear


Bearings are important parts in various large and small machines. The working environment of some machinery (such as crushers) is dusty. When part of the fine dust enters the high-speed bearing housing, it will cause the lubricating oil or grease in the bearing housing to deteriorate, poor lubrication, and then the bearing will wear.


The crusher works in a dusty environment


Bearings continue to run in a worn state, due to increased friction and heat increase, which leads to an increase in bearing temperature.


3. Improper installation


Improper installation is another important reason for bearing heating. Because the bearing is installed correctly or not, it has a direct impact on its life and the accuracy of the host, so the center line of the shaft and the bearing hole must be coincident during installation.


If the FAG bearing is installed incorrectly, the accuracy is low, and the bearing has deflection, torque will be generated during rotation, causing the bearing to heat or wear. In addition, the bearing will generate vibration, increase the noise, and increase the temperature rise.


4. Insufficient cooling


The usual manifestations of insufficient cooling include: pipeline blockage, improper selection of cooler, poor cooling effect, etc.


5. Large vibration


For example, the coupling alignment process difference does not meet the requirements, the rotor has dynamic and static imbalance, the foundation rigidity is poor, the foot is virtual, rotating stall and surge.


6. Check and replace not in time


If the bearing is found to be severely fatigued, peeling, oxidized, rusted, worn pits, cracks, or excessive noise that cannot be adjusted, if it is not replaced in time, it will cause the bearing to generate heat, abnormal noise, vibration, etc., which will affect the normal produce.


7. Poor bearing quality


Rolling bearing parts work for a long time under high alternating contact stress in the form of point contact or line contact. The accuracy, life and reliability of the main engine are largely determined by the bearing, so it is necessary to pay attention to the inspection during the purchase and acceptance of the bearing, and use qualified and high-quality products from regular manufacturers.


8. Improper selection of bearing


When selecting a bearing, you should pay attention to the limit speed and load capacity of the FAG bearing. It cannot be used with over-speed or over-load. This will only shorten the service life of the bearing, and the gain will not be worth the loss.