When we use bearings, if we find that the temperature is very high, we should stop the equipment immediately,...
When we use bearings, if we find that the temperature is very high, we should stop the equipment immediately, find out the cause, and deal with it according to the solution provided above. However, due to the different causes of bearing heating, the solutions are also different, so we should treat it in a specific way, with the help of technicians.
1. Check the temperature of the bearing when it is rotating. If the temperature of the bearing outer ring can be measured directly using the oil hole, it is more appropriate. Generally, the temperature of the bearing can be inferred from the temperature outside the bearing chamber. If the lubrication and installation parts are suitable, the bearing temperature will rise sharply and abnormal high temperature will occur. At this time, the operation must be stopped and necessary preventive measures must be taken.
2. Check the sound when the bearing is rolling. Even if the bearing is slightly peeled, it will emit abnormal and irregular sounds, so the sound detector can be used to distinguish it. The sound detector can be used to check the size and sound quality of the rolling sound of the bearing in operation, which plays a role of prevention in advance.
3. Check that the vibration of the bearing in operation, such as peeling, indentation, rust, crack and wear, can be reflected in the vibration measurement of the bearing. Bearing vibration is very sensitive to the damage of the bearing. Therefore, the vibration can be measured by using a special bearing vibration measuring device (frequency analyzer, etc.), and the specific abnormal situation can not be inferred from the frequency analysis. Since the measured values vary depending on the service conditions of bearings or the installation position of sensors, it is necessary to analyze and compare the measured values of each machine in advance to determine its judgment criteria.
Generally, the temperature of the bearing will rise slowly with the operation. The introduction and application of the bearing coating removal process will reach 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.
Whether on the shaft or in the bearing seat, the bearing shall be fixed in the radial, axial and tangential directions. Radial and tangential positioning is achieved by tight fitting of bearing rings, while axial positioning is only achieved by tight fitting in a few cases; Generally, axial limit parts, such as end caps and retaining rings, are used to limit the axial position within the clearance range.
