1, vibration of bearing ground
TIMKEN bearings are very sensitive to vibration, such as flaking, indentation, corrosion, crack, wear and so on, which can be reacted in vibration measurement. Thus, the vibration size can be measured by a special flange bearing vibration measuring instrument (frequency analyzer etc.), and the abnormal details can not be inferred through the frequency ratio. . The measured values are different due to the use of the bearings or the position of the sensor devices, so it is necessary to determine the criteria for the determination of the measured values of each machine at that time.
Bearing temperature, individual chamber outside the temperature can be guessing out, if the oil hole can directly measure the temperature of the outer ring, it is more suitable.
Under normal circumstances, the ground temperature slowly rises with the start of operation, and reaches stability after 1-2 hours. The abnormal temperature is different from the machine's heat capacity, heat dissipation, speed and load. If the lubrication and installation parts are suitable, the temperature will rise abruptly and will show abnormal high temperature. At this time, the operation must be finished and necessary precautions should be taken.
The use of thermal sensors can monitor the working temperature at any time and achieve active alarm or stagnation when temperature exceeds the specified value.
The use of high temperature is often abnormal. High temperature is also harmful to ground lubricants. Sometimes flange bearing overheating can be attributed to ground lubricants. If the temperature exceeds 125 degrees, long term transfer will be reduced. The causes of high temperature include inadequate lubrication or excessive lubrication, lubricants. It contains impurities, excessive load loss, insufficient space, and high friction in oil seals.
Secondly, check the surface of the bearing ground, the state of the rolling face and the face and the wear state of the cage, and the unusual condition, such as the wear condition of the cage, is special to look at the track of the raceway. To judge whether Wuxi bearing can be used again, it is necessary to consider the level of flange bearing damage, machine performance, importance, operating conditions, inspection cycle and so on.
For inspection results, if the TIMKEN bearing is damaged and abnormal, please find out the cause according to the phenomenon of bearing damage, and make a plan for it. In addition, the inspection results, when you have the following shortcomings, flange bearings can no longer be used, need to replace the new bearings.
A. There are 1 cracks and emerging debris in the inner and outer ring, rolling body and cage.
B. inside and outside, rolling body, any 1 of which are stripped.
C. the raceway, the edge and the rotating body are damaged by the visible card.
D. the rack is worn seriously or the rivet is loose.
E. raceway surface and rolling body are rusty and scars.
F. rolling surface and rolling body have significant indentation and scratch marks.
The inner diameter of the g. inner ring or the outer diameter of the outer ring is creep.
H. is overheated and discolourfully.
I. grease seals TIMKEN bearing ground seals and dust cover are damaged significantly.
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