Cement machinery bearing fault analysis and processing

Bearing is vulnerable parts of mechanical equipment, its operation state are in good condition directly affects the whole performance of the device. Cement machinery and equipment, the equipment failure caused by a rolling bearing early malfunction case a lot. So, find out fault source, take remedial measures to eliminate the fault, is one of the keys to improve system availability. 1 rolling bearing vibration analysis of the failure of rolling bearing and its typical way is to simply occur in rolling contact fatigue spalling. { TodayHot} This peeling, flaking surface area is about 2 was, depth of 0. 2毫米~ 0。 3 mm can monitor tests its vibration. Spalling may occur, the surface of the seat, seat or roller. Among them, the inner race because of the high contact stress, broken happens more. Used in all kinds of diagnosis of rolling bearing, vibration monitoring method is still one of the most main. In general, the time domain analysis method is simple, suitable for small noise interference, is a good way to simple diagnosis; Diagnosis method in frequency domain, the resonance demodulation method is the most mature and reliable, suitable for precision of the bearing fault diagnosis. Time - frequency analysis method and resonance demodulation methods are similar, correctly characterize fault signal time and frequency characteristics, the superiority. 2 damage forms of rolling bearing analysis and remedy ( 1) Overload. Serious surface spalling and wear, shows that the rolling bearing early fatigue failure caused by overload ( In addition to cooperate too tight can also cause a certain degree of fatigue) 。 Overload can also cause a serious bearing steel ball raceway wear, large area of spalling and sometimes accompanied by overheating. The remedy is to reduce the bearing load or improve the bearing capacity. ( 2) Overheating. Roller of raceway, steel ball retainer or change color, show that bearing overheating. A rise in temperature will reduce lubricant effect, make the oil desert formation or disappear entirely. Temperature is too high, can make the raceway and the material of steel ball annealing, hardness decrease. This is mainly the cooling adverse or overloading, under the condition of high speed cooling caused by inadequate. The solution is fully cooling, additional cooling. ( 3) Lower the corrosion of vibration load. In each ball appears on the axial position of the elliptic traces of wear, this shows that when the bearing is not work and did not produce lubricating oil film, caused by external vibration excessive or low load vibration failure. The remedy is to make the bearing vibration isolation or add anti-wear additive in bearing grease, etc. ( 4) Installation problem. Main pay attention to the following aspects: first, pay attention to the installation work. Such as rolling path interval pit, shows that the load has been beyond the elastic limit of material. This is due to the static overload or severe shock ( Once installed with a hammer percussion bearing, etc. ) Caused by. The correct installation method is only to be pressed the hoop power works