Cement machinery linear bearing damage is very common, often due to the cement manufacturing machinery and equipment wear. How to better understand the vulnerable parts of the machinery and equipment produced is what we are concerned with the subject linear bearings are vulnerable parts of a direct impact on the functioning of the whole equipment operation is in good condition. Cement machinery and equipment move linear bearings early failures lead to equipment failure, a lot of examples. To identify the root cause of the failure to take remedial measures to eliminate the fault, is the hub of one of the progressive system uptime.
a, overheating. Raceway, roller ball or cage change color, indicating that the linear bearing overheating. The elevated temperature causes the lubricant effect is reduced, so that oil lubrication is difficult to form or disappear completely. The temperature is too high, make the raceways and balls materials annealing, the decrease in hardness. This is mainly caused by inadequate cooling of the heat adverse or overloaded, high-speed case. The solution is adequate cooling, additional cooling.
b, overload. Severe flaking and wear, indicating that the linear bearings due to overload caused early fatigue failure generated (in addition with tight can also cause a certain degree of fatigue). Overload can also cause severe linear bearings ball raceway wear, large areas of flaking and sometimes accompanied by overheating. The remedy is to reduce the carrying capacity of the load or progress of linear bearings linear bearings.
c, low load vibration eclipse the. Traces of wear on the axial position of each of the balls thrown ovate, which indicates when the linear bearings does not work when the lubricant film is not generated, the vibration caused by excessive external vibration or low load failure. The remedy is the linear bearing isolator or anti-wear additives in the linear bearing grease.
Damage in the form of linear bearings and remedies B, linear bearings vibration analysis
Linear bearing failure typical way to move contacts simple fatigue spalling occurs. Such peeling, flaking surface area of approximately 2 mm, a depth of 0.2mm ~ 0.3mm can be detected by monitor its vibration to determine. Peeling may occur on the inner surface of the seat, the outer ring or on the move body. Wherein the inner ring due to the higher contact stress, the occurrence of many cases of rupture.
Various diagnostic techniques for linear bearings, vibration monitors monitoring method is still the most important kind. Overall, the time-domain analysis method is relatively simple, affordable noise is small, is a good way of simple diagnostic; diagnostic methods in the frequency domain, the resonance demodulation method is the most proven, affordable precision linear bearings fault diagnosis; time - frequency analysis methods and the resonance demodulation method can accurately record the time and frequency characteristics of the fault signal, more winning.