In normal use, vibration is very sensitive to bearing damage, peeling, indentation, rust, crack, wear and so on will be reflected in bearing vibration measurement. Therefore, the vibration can be measured by using a special bearing vibration measuring device (frequency analyzer, etc.), and the abnormal situation can not be inferred by frequency division. The measured values are different due 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.
High temperature often indicates that the bearing is in abnormal condition. High temperature is also harmful to bearing lubricants. Sometimes bearing overheating can be attributed to the lubricant in the bearing. If the temperature of the bearing exceeds 125 ℃ for a long time, the service life of the bearing will be reduced. Causes of high temperature bearing include: insufficient or excessive lubrication, lubricant. It contains impurities, too much load, bearing ring damage, insufficient clearance, high friction caused by oil seal, etc.
In the process of using bearing, it is easy to appear the phenomenon of temperature rise. When the bearing temperature rises, first judge whether the operation is wrong. If it does rise, do the following:
① Check whether the cooling water pressure, water flow and pipeline system are normal. If the filter is blocked due to low water pressure and cannot be treated in time, it can be shut down for treatment. When it is confirmed that it can work, it can be put into use.
②The oil pressure of the governor should be checked, if the oil pressure is low, it may cause the cooling water hydraulic valve to close.
③ Check whether there is abnormal noise in the bearing and check whether there is abnormal swing of the bearing.
④ Take oil samples to observe whether there is any change in oil color, and conduct test to see whether it is deteriorated. If the deterioration is confirmed, stop the machine and replace with new oil.
⑤ Check whether the oil level of the oil standard is normal. If not, check whether the drain valve of the oil tank is closed tightly. If it has been closed tightly, make up oil. If the sealing gasket leaks oil, shut down the machine for treatment.
Vibration is very sensitive to bearing damage. Peeling, indentation, rust, crack and wear will be reflected in bearing vibration measurement. Therefore, the vibration can be measured by using a special bearing vibration measuring device (frequency analyzer, etc.), and the abnormal situation can not be inferred by frequency division. The measured values are different due 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.
Let's take a look at the influence of temperature on the bearing. High temperature often indicates that the bearing is in abnormal condition. High temperature is also harmful to bearing lubricants. Sometimes bearing overheating can be attributed to the lubricant in the bearing. If the temperature exceeds 125 ℃ for a long time, the bearing life will be reduced. Causes of high temperature bearing include: insufficient or excessive lubrication, lubricant. It contains impurities, too much load, bearing ring damage, insufficient clearance, high friction caused by oil seal, etc.
Therefore, it is necessary to monitor the bearing temperature continuously, no matter the bearing itself or other important parts. If the operating conditions are unchanged, any temperature change can indicate that a fault has occurred.
The periodic measurement of bearing temperature can be made by means of a thermometer, such as a digital thermometer, which can accurately measure the bearing temperature and display it in units of ℃ or Fahrenheit. The important bearing means that when it is damaged, the equipment will be shut down. Therefore, it is better to install temperature detector for this kind of bearing.
