2012年9月5日星期三

Cement machinery bearing failure remedies


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Cement mechanical damage is very common, because the cement manufacturing tend to wear these mechanical devices much. How to better understand their vulnerable parts better

production is our conc ern! The bearings are vulnerable parts of the machinery and equipment, and its operation is in good condition, a direct impact on the performance of the

device. Cement machinery and equipment, by the early failures of the rolling bearing many instances of equipment failure. Therefore identify the root cause of the failure to

take remedial measures to eliminate the fault, is one of the keys to improve system operation rate.buy bearing
A, the form of rolling bearing damage and remedies
B, Bearing Vibration Analysis
The typical way of rolling bearing failure is simple rolling contact fatigue spalling. {TodayHot} such peeling, flaking surface area of about 2mm2 depth of 0.2mm ~ 0.3mm can be

detected through the monitor its vibration to determine. Flaking may occur on the inner surface of the seat ring, outer race or rolling element. Wherein the inner race due to

high contact stresses, the occurrence of cracking in many cases.
Various diagnostic techniques for rolling bearings, vibration monitors monitoring method is still the most important one. Overall, the time-domain analysis method is relatively

simple, suitable for the noise is small, simple diagnostic method; diagnostic method in the frequency domain, the resonance demodulation method is the most mature and reliable,

suitable for precision bearing fault diagnosis; Time - similar frequency analysis method and the resonance demodulation method correctly characterize the failure time and

frequency characteristics of the signal, the more advantages.

a, overheating. Raceway roller, ball, change color or retainer that bearing overheating. Lubricant role of the temperature will decrease the oil is the desert difficult to form

or disappear completely. Temperature is too high, will raceways and balls material anneal ing, the hardness decreased. This is mainly unfavorable heat or overloading,

insufficient cooling caused by the high-speed case. The solution is adequate cooling, additional cooling.roller ball bearing
b overload. Severe flaking and wear that Rolling generated due to the overload caused early fatigue failure (addition with tight can also cause a certain degree of fatigue).

Overload would cause serious bearing steel ball raceway wear, peeling off a large area and sometimes accompanied by overheating. The remedy is to reduce the load on the bearing

or increase the carrying capacity of the bearing.cylindrical bearings
c, low load vibration eclipse. Oval traces of wear on the axial position of each steel ball, which indicates that when the bearing does not work not produce a lubricating oil

film, caused by the excessive external vibration or low load vibration eclipse VALID. The remedy is to the bearing isolator or antiwear additives in the grease of the bearing

was added.

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