SKF bearings fever: causes and solutions
(1) cause: the precision bearings low
Method: choose the required accuracy of bearing
(2) reasons: bent or box spindle hole not concentric
Method: repair of spindles or box
(3) reasons: the belt too tight
Methods: adjust belt tension proper
(4) reasons: poor lubrication
Method: select required grade of lubricating materials and properly cleaned
(5) reasons: low Assembly quality
Approach: improving Assembly quality
(6) the cause: within the bearing shell run
Methods: the replacement of wear of bearings and related parts
(7) the axial force is too big
Method: cleaning, adjusting the sealing mouth ring clearance required between 0.2~0.3mm, correct balancing of the impeller diameter and check static balance value
(8) the bearing damage
Methods: the replacement of bearings
Bearing heating causes
(1) high bearing temperatures, suspected of improper clearance adjustment of the coupling device, a little vibration, resulting in bearing temperature rise too high.
(2) motor design rationality of manufacturing quality installation quality.
(3) quality problems caused by the heating of NSK bearings, bearing clearances.
　　For high-voltage motor bearings often fever, we constantly and motor manufacturing quality in several areas from above, to check and adjust the lubrication and cooling of the structure, but after each replacement of bearings, power on in less than three days, bearing temperatures up to 120 ° c, and temperature can be controlled at around 85 ° c after three days, but after January, the problem appeared. Once we realize that fever may be a bearing in the motor bearings in bearing grinding the outer end cap. We have to master the maintenance of high-voltage motor and factory technicians on-site inspections, also have said that the fan vibration is the main factor causing electrical heating in the bearings. Finally, we had some of the manufacturer's engineers, several times, the final issues have not been resolved.
Jaw Crusher FAG bearings heat is what causes
　　① tubing plug, lubricating oil flow obstruction;
　　② tubing leak oil, insufficient oil pressure supply;
　　③ oil too dirty, mixed with debris;
　　④ gap between the bearing and shaft is too small;
　　⑤ lubricant is suitable, the granularity is too large or too small;
　　F starts without opening the oil temperature during the winter heating oil too viscous;
　　⑦ in the summer, made from oil pump lubricating oil through oil cooler, or oil cooler failures, such as poor pipe plug, water, water;
　　⑧ INA bearingscooling device fails, such as blocking;
　　Issues of discharge gate down too small (the thrust plate is too long) the eccentric axial force is too large;
　　⑩ transmission belt tension too tight, shaft tolerance is too large.
Circular vibrating screen in using Timken bearings, high temperature rise, bearings are easy to damage. Analysis:
1, if this is a new screen, must be a process problem, if it is a old sieves, stiffness, base
2 Yes, lubrication system problem
3, bearing clearance is to choose the right
4, bearing manufacturers are qualified?
5, processing accuracy. Due to domestic processing of imprecision, so used 3 large bearing clearance, this bearing is the expense of increased noise.
6, bearing with the bearing selection, affect the heating and bearing life.
7, structural design is not reasonable.
8, sieve the focus error is too large
9, lubrication is unreasonable, or come on too much or too little
10, the bearings are mounted correctly or not, tolerances meet reasonable or not is the key to heat

 


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