NTN rolling mill bearing a card failure reason analysis

Let's analyze what is NTN bearing failure reason, recently there has been a rolling mill bearing failure case, engineers are looking for reasons but has not been found. And the correct cut off impurities and moisture, said oil seal should not wear. However, best when open the bearing box, check the bearing and periodically check the oil seal. Check of the condition of the near the high temperature bearing oil seal, to ensure that they are enough to prevent hot liquids or corrosion along the axis of the liquid or gas seeping into the bearings. Usually, NTN bearing temperature as bearing operation began to rise slowly, 1 - After 2 hours to reach steady state. Normal temperature of the rolling mill bearings for machine heat capacity, heat dissipating capacity, rotational speed and load. If the appropriate lubrication, installation department, the bearing temperature will rise sharply, appear unusually high temperature, must stop at this moment, take the necessary precautions. Using thermal device can monitor the bearing temperature at any time, and realize e. automatic alarm when the temperature exceeds or stop to prevent the shaft accidents. With high temperature often said NTN bearing is in abnormal situation. High temperature is also bad for rolling mill bearing lubricant. Sometimes overheated bearings can be classified to the bearing lubricant. If the bearing temperature for a long time even the transfer of more than 125 ℃ lower bearing life. The causes of high temperature bearing include: lubrication inadequate or excessive lubrication, the lubricant. Contains impurities, heavy load, bearing damage, clearance, high friction and oil seal and so on. So the continuous monitoring NTN bearing temperature is necessary, whether measured rolling mill bearing itself or other important parts. If it is on the basis of the operating conditions, the temperature change of any fault has occurred. Analysis of bearing failure before we actually can not, high temperature also harmful to within the bearing lubricant, sometimes bearing overheating can be blamed on NTN bearing lubricant, if bearing in more than 125 degrees Celsius temperature operation for a long time, can reduce high temperature bearing life, the cause of high temperature bearings include: insufficient lubrication or excessive lubrication, lubricants containing magazine, the load is too large, rolling mill bearing damage, clearance, and the oil seal of high temperature and friction and so on. Ok let's sum up these, if there is not all of you in supplement, for NTN bearing failure we can only say so much.