When bearing is damaged, usually we will assume it was caused by vibration or high temperature. Here are the effects of vibration and temperature on the bearing:
1) Effect of vibration on bearing
In normal use, bearing is easily damaged via vibration. Spalling, indentation, corrosion, cracks, and wear will be reflected in the bearing vibration measurement. Therefore, by using a special bearing vibration measuring device (frequency analyzer, etc.) can measure the size of the vibration, through the frequency distribution can be inferred abnormal specific circumstances. The measured values vary with the conditions of use of the bearings or the location of the sensors, so it is necessary to analyze and compare the measured values of each machine in advance to determine the criteria.
2) Effect of temperature on bearing
High temperature is often used to indicate that the bearing is in abnormal condition. High temperatures are also harmful to bearing lubricants. Sometimes bearing overheating can be attributed to the bearing lubricant. If the bearing in excess of 125 °C temperature for a long period of time , the bearing life will reduce. Causes of high temperature bearings include: insufficient or excessive lubrication, lubricants. Contains impurities, excessive load, bearing damage, lack of clearance, and oil seal caused by high friction and so on.
It is easy to overheat in the use of bearings. When the bearing temperature rise, firstly judge whether misoperation, if indeed rise, do as the following processing:
1.Check the cooling water pressure, water flow and piping system is normal. If the water pressure may be low filter plug, can not be processed in time, can be stopped processing, when confirmed to work, then put into use.
2. Check the governor’s oil pressure, if the oil pressure is low may cause the cooling water hydraulic valve closed.
3, check whether there is abnormal bearing sound, and check whether there is abnormal bearing swing.
4. Take oil samples to see if the color of the oil has changed, and test them to see if they have gone bad. If the deterioration is confirmed, the machine should be stopped to replace the new oil.
5, check the oil level is normal, if not normal, check the oil tank drain valve is closed. If it has been closed, should be filled with oil, if it is the leakage of sealant pad, should stop processing.
