Bearings are indispensable important parts in mechanical equipment. Its main function is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotation accuracy. After the bearing is used for a period of time, some failures will occur more or less, so how to judge whether the bearing is malfunctioning through the sound, vibration amplitude, and temperature when the bearing is running? The following is a detailed introduction for everyone.

Bearing vibration

Bearing vibration is very sensitive to bearing damage, such as peeling, indentation, rust, cracks, wear, etc., will be reflected in the bearing vibration measurement, so the vibration can be measured by using a special bearing vibration measurement device (frequency analyzer, etc.) The specific situation of the abnormality cannot be inferred through the frequency division. The measured value is different due to the use condition of the bearing or the installation position of the sensor, so it is necessary to analyze and compare the measured value of each machine in advance to determine the judgment standard.

The rolling sound of the bearing

A sound meter is used to check the size and sound quality of the rolling sound of the bearing in operation. Even if the bearing is slightly damaged such as peeling, it will emit abnormal and irregular sounds, which can be distinguished by the sound meter.

Bearing temperature

The temperature of the bearing can generally be inferred from the temperature of the outside of the bearing. It is more appropriate if the oil hole can be used to directly measure the temperature of the outer ring of the bearing. Generally, the temperature of the bearing slowly rises as it starts to run, and reaches a steady state after 1-2 hours. The normal temperature of cylindrical roller bearings varies with the heat capacity, heat dissipation, speed and load of the machine. If the lubrication and installation parts are proper, the bearing temperature will rise sharply and abnormally high temperature will occur. At this time, the operation must be stopped and necessary precautions must be taken.