1. Bearing vibration: Bearing vibration is very sensitive to bearing damage, such as spalling, indentation, rust, cracks, wear, etc., will be reflected in the vibration measurement of four-row cylindrical roller bearings. Therefore, by using a special bearing vibration measurement The frequency analyzer (frequency analyzer, etc.) can measure the size of the vibration, and the specific situation of the abnormality cannot be inferred through the frequency division. The measured values ​​differ depending on the operating conditions of the bearing or the installation position of the sensor. Therefore, it is necessary to analyze and compare the measured values ​​of each machine in advance to determine the judgment standard. 2. The temperature of the bearing: The temperature of the bearing can generally be inferred from the temperature outside the bearing chamber. If the temperature of the outer ring of the bearing can be directly measured by using the oil hole, it is more appropriate. Generally, the temperature of the four-row cylindrical roller bearing starts to rise slowly with the operation of the bearing, and reaches a steady state after 1-2 hours. The normal temperature of the bearing varies with the heat capacity, heat dissipation, speed and load of the machine. If the lubrication and installation parts are suitable, the bearing temperature will rise sharply, and abnormally high temperature will occur. At this time, the operation must be stopped and necessary preventive measures should be taken. The use of thermal sensors can monitor the working temperature of the bearing at any time, and realize automatic alarm or stop when the temperature exceeds the specified value to prevent the occurrence of burning shaft accidents. Four-row cylindrical roller bearing failure characteristics exhibit critical failures no more than a week old when equipment, larger capacity, faster, and its shorter time intervals. Therefore, in the actual bearing fault diagnosis, once the fault is found, its advanced function should decisively determine the fault of the spherical roller bearing and repair it as soon as possible. 1. Selection and control of shaft and bearing chamber tolerances: After the bearing is pressed into the bearing, it should rotate flexibly without any sense of blockage. If the rotation is obviously inflexible, it indicates that the size of the shaft is too large and the tolerance should be reduced. 2. Bearing assembly method: Because the bearing is a high-precision product, it is easy to cause damage to the four-row cylindrical roller bearing channel if improperly assembled, resulting in bearing damage. 3. Prevention of foreign objects in assembly: When the four-row cylindrical roller bearing is installed on the rotor for dynamic balance, it is easy to enter the iron filings generated during dynamic balancing into the bearing, so it is best to do dynamic balance before installing the bearing. 4. Prevention of paint rust: The characteristic of paint rust is that it occurs frequently in sealed motors. The motor has a good sound during assembly, but after being placed in the warehouse for some time, the abnormal noise of the motor becomes very large. Severe rusting. During the inspection of the four-row cylindrical roller bearing, if there are too many problems, it also means that this kind of bearing may be a counterfeit imported bearing. That is to remind everyone to be careful when choosing.
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