Rolling sound of bearing
Use a sound detector to check the size and sound quality of the rolling sound of the running bearing. Even if the bearing has slight peeling and other damage, it will produce abnormal sound and irregular sound, which can be distinguished by the sound detector.
Vibration of bearing
Bearing vibration is very sensitive to bearing damage, such as spalling, indentation, rust, crack, wear, etc., which will be reflected in bearing vibration measurement. Therefore, the magnitude of vibration can be measured by using a special bearing vibration meter (frequency analyzer, etc.), and the specific abnormal situation can not be inferred from the frequency division. The measured values vary according to the service conditions of the bearing or the installation position of the sensor, so it is necessary to analyze and compare the measured values of each machine in advance to determine the judgment standard.
Temperature of bearing
Generally, the temperature of the bearing can 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. Usually, the temperature of the bearing starts to rise slowly with the operation, and reaches a stable state after 1-2 hours. The normal temperature of the bearing varies with the heat capacity, heat dissipation, speed and load of the machine.
