Causes and Avoidance Measures of High Bearing Temperature
Release time:
2023-08-28
The use of thermal sensors can monitor the working temperature of the bearing at any time, and realize the automatic alarm or stop to prevent the occurrence of shaft combustion accidents when the temperature exceeds the specified value. High temperature often indicates that the bearing is in an abnormal situation. High temperatures are also detrimental to the bearing lubricant. Sometimes bearing overheating can be attributed to the bearing lubricant. If the bearing is connected for a long time at a temperature exceeding 125 ℃, the bearing life will be reduced. Causes of high temperature bearings include: insufficient lubrication or excessive lubrication, lubricants. It contains impurities, excessive load, bearing ring damage, insufficient clearance, and high friction caused by oil seal.
The use of thermal sensors can monitor the working temperature of the bearing at any time, and realize the automatic alarm or stop to prevent the occurrence of shaft combustion accidents when the temperature exceeds the specified value. High temperature often indicates that the bearing is in an abnormal situation. High temperatures are also detrimental to the bearing lubricant. Sometimes bearing overheating can be attributed to the bearing lubricant. If the bearing is connected for a long time at a temperature exceeding 125 ℃, the bearing life will be reduced. Causes of high temperature bearings include: insufficient lubrication or excessive lubrication, lubricants. It contains impurities, excessive load, bearing ring damage, insufficient clearance, and high friction caused by oil seal.
Therefore, it is necessary to monitor the temperature of the imported bearing continuously, whether it is measuring the bearing itself or other important parts. If the operating conditions are unchanged, any temperature change can indicate that a failure has occurred. Periodic measurement of bearing temperature can be carried out 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 importance of the bearing means that when it is damaged, it will cause the equipment to stop, so this kind of bearing should be equipped with temperature detector. Under normal circumstances, the bearing will have a natural temperature rise after lubrication or re-lubrication and will last for one to two days.
Generally, imported bearings used at a working temperature above 150 ° are called high-temperature bearings. As chromium bearing steel is used at a temperature exceeding 150 °, its hardness will drop sharply and its size will be unstable, making the bearing unable to work normally. Therefore, for bearings that work at a working temperature of 150 ° to 350 °, if the rings and rolling elements are still made of ordinary high-carbon chromium bearing steel, special tempering treatment must be carried out on the bearing parts, which should generally be higher than the working temperature. Tempering at 50 °. The bearing steel tempered according to the above requirements can be used normally at the working temperature. However, due to the decrease in hardness after tempering, bearing life has been reduced.
Generally speaking, from the perspective of use, we should pay attention to the following points:
1. The bearing clearance should be appropriate. If it is too large, it will produce impact. If it is too small, it will be poorly lubricated and may burn tiles.
2, imported bearings and journal surface quality and geometry should be strictly guaranteed.
3. Improve lubrication quality, control oil pressure, temperature and flow, and strengthen oil filtration.
4. It is unfavorable to control the temperature state of the diesel engine and work under the condition of supercooling and overheating. In cold weather, the diesel engine should be preheated before starting, and the crankshaft should be turned by hand to make the oil enter the friction surface.
5, the use of fuel and lubricating oil in accordance with the provisions.
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