1、 Vibration of bearings

Bearing vibration is very sensitive to bearing damage, such as peeling, indentation, rust, cracks, wear, etc., which can be reflected in bearing vibration measurement. Therefore, the size of vibration can be measured by using special bearing vibration measuring devices (frequency analyzers, etc.), and the specific abnormal situation cannot be inferred through frequency analysis. The measured values vary depending on the usage conditions of the bearings or the installation position of the sensors, so it is necessary to analyze and compare the measured values of each machine in advance to determine the judgment criteria.

2、 Temperature of bearings

The temperature of the bearing can generally be inferred from the temperature outside the bearing chamber. If the temperature of the bearing outer ring can be directly measured using an oil hole, it is more suitable.

Usually, the temperature of the bearing gradually increases as it starts to run, and reaches a stable state after 1-2 hours. The normal temperature of bearings varies depending on the heat capacity, heat dissipation, rotational speed, and load of the machine. If the lubrication and installation parts are suitable, the bearing temperature will suddenly rise and abnormal high temperatures will occur. At this time, the operation must be stopped and necessary preventive measures must be taken.

The use of a thermal sensor can monitor the working temperature of the bearing at any time, and achieve automatic alarm or stop to prevent shaft accidents when the temperature exceeds the specified value.

High temperature often indicates that the bearing is in abnormal condition. High temperatures are also harmful to the lubricant of bearings. Sometimes overheating of bearings can be attributed to the lubricant used in the bearings. If the bearing is continuously transferred at a temperature exceeding 125 ℃ for a long time, the bearing life will be reduced. The causes of high temperature bearings include insufficient or excessive lubrication, lubricants. It contains impurities, excessive load, bearing ring damage, insufficient clearance, and high friction caused by oil seals.

Therefore, continuous monitoring of bearing temperature is necessary, whether it is measuring the bearing itself or other important parts. If the operating conditions remain unchanged, any temperature change can indicate that a malfunction has occurred.

Regular measurement of bearing temperature can be achieved through thermometers, such as SKF digital thermometers, which can accurately measure bearing temperature and display it in units of ℃ or Fahrenheit.

The importance of bearings means that when they are damaged, it will cause equipment shutdown, so it is best to install temperature detectors for these types of bearings. Under normal circumstances, bearings will experience a natural temperature rise after initial lubrication or re lubrication, lasting for one or two days.