2014年1月17日星期五

Roller Bearing in the dust and other foreign matter




If the rolling bearings appearance of cracks , dents or corrosion , such as a rivet that will attack the periodic noise and vibration , the period can be fixed with a constant rotational speed but most necessary correspondence between the channel will continue scars attack, scars on hidden when on the ball , and this noise with the device and the premise is necessarily smooth transition .
Such noise control methods are: when the device is not a knock bearings, cylindrical roller bearing and the shaft assembly before loading ramp when loading to avoid bearing housings ; avoid shock and vibration during transportation to avoid bearing corrosion inventory ; using viscosity smooth high fat .
bearings in the dust and other foreign matter , would attack the so-called non-periodic vibrations and dust, sound, vibration and noise of the size of its uncertainty, and with or without .
Dust sound control methods are: to improve the cleaning methods bearings , before the device will cylindrical roller bearings , shaft, housing bore and match parts clean and fully severely Qing Shen ; eliminate foreign objects inside the smooth agent ; improve  Bearing seals ; prevent the use of information impure or foreign body embedded plastic stick rack .
lubrication caused by the elements and Countermeasures
Lubricant selection errors, lack of lubricant aging or the onset of induration , lysn roller bearing  can lead to the occurrence of vibration and noise , and this noise is not necessarily the rule. About this situation, as long as the selection of the appropriate smoothing agent to adjust its smooth dose , extended use of life smooth and reasonably determine the change agent cycle .
The impact of vibration on the tapered rollers failure of the bearing INA bearing obvious example : peeling , indentation, corrosion, cracks, wear , etc. will be reflected in the bearing vibration detection , so by using a special rolling bearing vibration measuring devices ( frequency analyzer and vibration analyzer etc. ) to measure the size of the vibration , the specific circumstances of abnormal vibration frequency distribution can be inferred by the measured value conditions due to cylindrical roller bearings or sensor installation location is different , and therefore requires prior measurement of each machine after analyzing and comparing the value determined criteria .
With INA bearing temperature usually run slowly increased from 1 to 2 hours after reaching steady state. Machine at normal temperature due to heat the bearing capacity , heat capacity , and different speed and load , if lubrication, improper installation , the cylindrical roller Bearing abrupt temperature rise , there will be abnormally high , then you must stop and take the necessary precautions.

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