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Generally, SKF bearing after the start of heating operation will, over time, i.e., at a lower temperature (usually higher than room temperature 10 ° to 40 °) in the normal state. To the normal time, the bearing according to the size, form, rotating speed, lubrication, heat the surrounding conditions change and the type bearing, this time generally ranging from 20 minutes to several hours.
     Bearing temperature does not reach normal and abnormal temperature rise occurs, consider the following reasons, should also be shut down as soon as possible and take the necessary countermeasures.
     SKF bearing temperature is critical to maintain proper bearing life and prevent oil deterioration, etc. Suggestion: try to control the temperature in the non-state (usually 100 degrees) using the most ideal.
Mainly due to abnormal temperature rise
Too much or too little oil.
Poor bearing installation.
Bearing internal clearance is too small, or the load is too large.
Excessive friction seals.
Lubricants match.
With the surface of the creep.
When SKF bearing temperature is high, the following aspects should start to solve the problem:
1) the amount of fuel is not appropriate, too little or too much grease. Come to the bearing housing should be regularly work in accordance with the requirements. Sometimes appear after bearing oil temperature is high, mainly oil too. After this time the temperature continues to rise to the phenomenon reaches a point (usually higher than the normal operating temperature of about 10 ℃ ~ 15 ℃) will remain unchanged, and then gradually decreased.
2) bearing grease applied does not meet the requirements or contaminated. Lubricants choice inappropriate, difficult to form a uniform lubricant film, not reduce internal friction and bearing wear, lack of lubrication, the bearing temperature. When mixing different types of grease, the chemical reaction may occur, resulting in deterioration of the grease, agglomeration, reducing the lubricating effect. Contaminated oil also makes bearings temperature, add oil during the fall of dust, causing oil pollution, resulting in deterioration of grease inside the bearing housing damage bearing lubrication, temperature. So should choose a suitable oil, overhaul of the bearing housing and bearing in cleaning, refueling pipeline dredge checked, not allowed to mix different types of grease, if the replacement of other types of grease, fats should first clean up the original; operation and maintenance periodically add oil, grease should keep good measure moisture and dust.
3) insufficient cooling. Check the pipeline is blocked, oil inlet temperature and the return temperature is exceeded. If the selection of inappropriate cooler, the cooling effect is poor, can not meet the requirements, it shall promptly replace or install a new cooler side by side. ID fan should also check the insulation and sealing SMIC barrel.
4) Make sure there is no problem then check the coupling alignment conditions and SKF bearings. Looking about in line with the coupling process standards. In the axial fan, fluid coupling device operation should also be considered, such as the thermal expansion of the problem to find positive. Induced draft fan impeller side due to thermal expansion, increased bearing housing; hydraulic coupling operation temperature expansion of the bearing housing, bearings increases, so look for the positive motor is higher, the amount set aside to be based on the size and characteristics of the equipment operation temperature parameters may be.