Roller bearing is cylindrical, conical or drum-shaped roller for rolling element bearing. Roller bearings are mainly radial cylindrical roller, double row spherical roller, tapered roller and thrust roller and structure type.
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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