Generally, the temperature of deep groove ball bearing can be inferred from the temperature outside the deep groove ball bearing chamber. If the temperature of bearing outer ring can be directly measured by using oil hole, it is more appropriate. Generally, the temperature of deep groove ball bearing rises slowly with the bearing running, and reaches stable state after 1-2 hours. The normal temperature of deep groove ball bearings varies with the heat capacity, heat dissipation, speed and load of the machine. If the lubrication and installation parts are suitable, the temperature of the deep groove ball bearing will rise sharply and abnormal high temperature will occur. At this time, the operation must be stopped and necessary preventive measures shall be taken. The working temperature of deep groove ball bearing can be monitored by thermal sensor at any time, and alarm or stop automatically when the temperature exceeds the specified value, so as to prevent the occurrence of shaft burning accident. High temperature often indicates that deep groove ball bearing is in abnormal condition.
High temperatures can also be harmful to bearing lubricants. Sometimes the overheating of deep groove ball bearings can be attributed to the bearing lubricant. If the temperature of the bearing exceeds 125 ℃ for a long time, the service life of the bearing will be reduced. The causes of high temperature deep groove ball bearing include: insufficient or excessive lubrication, lubricant. It contains impurities, excessive load, ring damage of deep groove ball bearing, insufficient clearance, high friction caused by oil seal, etc. Therefore, it is necessary to continuously monitor the temperature of deep groove ball bearing, whether it is measuring the deep groove ball bearing itself or other important parts. If the operating conditions remain unchanged, any temperature change can indicate that a fault has occurred. By means of thermometer, such as digital thermometer, the temperature of deep groove ball bearing can be measured accurately and displayed in units of ℃ or Fahrenheit. The importance of deep groove ball 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 deep groove ball bearing. Under normal conditions, deep groove ball bearings will have a natural temperature rise after just lubrication or relubrication and last for one to two days.
In general, K bearing used at working temperature above 150 ° is called high-temperature bearing. When the service temperature of chromium bearing steel exceeds 150 ° its hardness will drop sharply and its dimension will be unstable, so that the deep groove ball bearing can not work normally. Therefore, for the deep groove ball bearing working at 150 ° to 350 ° working temperature, if the ring and rolling element are still made of ordinary high carbon chromium bearing steel, special tempering treatment must be carried out for the parts of deep groove ball bearing, which should be tempered at 50 ° higher than the working temperature. The bearing steel tempered according to the above requirements can be used normally at working temperature. However, the service life of deep groove ball bearing is reduced due to the decrease of hardness after tempering. When the working temperature of deep groove ball bearing is higher than 350 ℃, it must be made of high temperature resistant deep groove ball bearing steel. If the temperature of deep groove ball bearing is too high, the corresponding remedial measures are as follows: during the operation of the mechanism, a certain temperature is allowed at the position where the deep groove ball bearing is installed. When touching the shell of the mechanism by hand, it is normal that the temperature is not hot, otherwise it indicates that the temperature of the bearing is too high. The causes of high temperature of deep groove ball bearing are as follows:
(1) The quality of lubricating oil does not meet the requirements or deteriorates, and the viscosity of lubricating oil is too high;
(2) Mechanism assembly is too tight (insufficient clearance);
(3) The assembly of deep groove ball bearing is too tight;
(4) The race of deep groove ball bearing rotates on the shaft or in the shell;
(5) Excessive load;
(6) The cage or rolling element of deep groove ball bearing is broken