How to from the needle roller bearing vibration and temperature to judge its status

If want to judge the stand or fall of needle roller bearing, can from two aspects of its vibration and temperature. Needle roller bearing on bearing vibration damage is very sensitive ^, such as peeling, indentation, rust, crack and wear will be reflected in the needle roller bearing vibration measurement, therefore, through the use of special bearing vibration meter can measure the size of the vibration, through frequency points cannot deduce the abnormal situation. Measured values due to the use of needle bearing conditions or sensor installation position and different, so need prior to each machine is analyzed by the measured value of the determined after judgment standard. Needle roller bearing temperature, average outdoor surface temperature can be predicted by the bearing, if use oil hole needle roller bearing outer ring temperature can be measured directly, is more appropriate. Usually, the temperature of the needle roller bearing with bearing operation began to slowly rise, 1 - After 2 hours to reach steady state. Normal temperature of the needle roller bearing 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, then must stop, take the necessary precautions. Using hot ^ device can monitor the working temperature of needle roller bearing, and implement e. automatically when the temperature exceeds ^ or stop to prevent the shaft accidents. In high temperature often is in abnormal situation, the high temperature also harmful to needle roller bearing lubricant. If the needle roller bearing in more than 125 ℃ temperature even move to reduce needle bearing life for a long time. The causes of high temperature needle bearing include: lubrication inadequate or excessive lubrication, the lubricant. Contains impurities, heavy load, needle roller bearing damage of ring, clearance, high friction and oil seal and so on. Therefore the continuous monitoring of needle bearing temperature is necessary, whether measured needle roller bearing itself or other important parts. If it is on the basis of the operating conditions, the temperature change of any fault has occurred. Sources: the list /? 3 _1. 超文本标记语言