Timken bearing vibration damage is very sensitive, such as peeling, indentation, corrosion, crack, wear, etc. will be reflected in the vibration measurement. Therefore, the vibration can be measured by using a special flange bearing vibration meter (frequency analyzer, etc.), and the specific abnormal situation can not be inferred through the frequency division. The measured values are different due to the service conditions of the bearing or the installation position of the sensor. Therefore, it is necessary to analyze and compare the measured values of each machine in advance to determine the judgment standard.Technical introduction to damage repair of Timken flange bearing
Technical introduction to damage repair of Timken flange bearing
Temperature
The bearing temperature can be inferred from the temperature outside the chamber. It is more appropriate if the outer ring temperature can be measured directly by using the oil hole.Technical introduction to damage repair of Timken flange bearing
Usually, the temperature rises slowly with the start of operation and reaches a stable state after 1-2 hours. The normal temperature varies with the heat capacity, heat dissipation, rotating speed and load of the machine. If the lubrication and installation parts are appropriate, the temperature will rise sharply and abnormal high temperature will occur. At this time, the operation must be stopped and necessary preventive measures must be taken.Technical introduction to damage repair of Timken flange bearing
The thermal sensor can monitor the working temperature at any time, and automatically alarm or stop when the temperature exceeds the specified value to prevent the occurrence of combustion shaft accident.Technical introduction to damage repair of Timken flange bearing
High temperature often indicates that it is in an abnormal situation. High temperatures are also harmful to lubricants. Sometimes flange bearing overheating can be attributed to the lubricant. If the temperature exceeds 125 ℃ for a long time, the service life will be reduced. Causes of high temperature include insufficient or excessive lubrication and lubricant. It contains impurities, excessive load, ring damage, insufficient clearance, high friction caused by oil seal, etc.
Secondly, check the raceway surface, rolling surface and mating surface of the bearing and the wear state of the cage for damage and abnormalities, especially observe the running track of the raceway surface. To judge whether Wuxi bearing can be used again, it should be decided after considering the damage degree of flange bearing, machine performance, importance, operating conditions, inspection cycle, etc.Technical introduction to damage repair of Timken flange bearing
According to the inspection results, if Timken bearing is found to be damaged or abnormal, please find out the causes and formulate countermeasures according to the phenomenon of bearing damage. In addition, according to the inspection results, if there are the following defects, the flange bearing can no longer be used and needs to be replaced with a new bearing.Technical introduction to damage repair of Timken flange bearing
a. Any one of the inner and outer rings, rolling elements and cage has cracks and fragments.
b. Any one of the inner and outer rings and rolling elements has peeling.Technical introduction to damage repair of Timken flange bearing
c. The raceway surface, retaining edge and rolling element are significantly jammed.
d. The cage is seriously worn or the rivets are loose.
e. The raceway surface and rolling element are rusty and scarred.
f. The rolling surface and rolling body have significant indentation and indentation.
g. There is creep on the inner diameter surface of the inner ring or the outer diameter of the outer ring.
h. Overheated and discolored.Technical introduction to damage repair of Timken flange bearing
i. The sealing ring and dust cover of Timken bearing sealed with grease are damaged seriously.
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