What are the effects of high operating temperature of deep groove ball bearing 69 series

In deep groove ball bearing applications, operating temperature control is critical. Excessive temperatures not only lead to grease degradation, but also affect the overall performance and service life of the bearing. Grease is an integral component of deep groove ball bearings, and its performance is closely related to operating temperature. When the operating temperature exceeds the designed operating range of the grease, the grease undergoes oxidation and decomposition, resulting in a significant decrease in its lubrication properties. In this case, the viscosity of the grease decreases and the lubrication film cannot be effectively formed, resulting in increased friction and increased wear. In addition, grease degradation may also cause oil-water separation and the formation of sediments, which further accelerate the wear process of the bearing and significantly shorten its service life.

The increase in temperature also causes thermal expansion of the bearing material, affecting its fit accuracy. The clearances between the inner ring, outer ring and rolling elements of deep groove ball bearings are precisely designed to ensure excellent rotational performance and load-bearing capacity. When the temperature rises, the thermal expansion of the material will cause changes in the bearing clearance, which in turn affects its normal operation. If the clearance is too large, it may cause instability and jumping of the rolling elements, thereby increasing noise and vibration; on the contrary, if the clearance is too small, it may cause the bearing to jam or fail, and in severe cases even damage the equipment.

In addition, excessively high operating temperatures will significantly reduce the fatigue life of bearings. Deep groove ball bearings are subjected to alternating loads during operation, and the fatigue strength of their materials is closely related to temperature. In high temperature environments, the fatigue strength of materials is significantly reduced, making bearings more susceptible to fatigue damage when subjected to cyclic loads. Studies have shown that there is a significant negative correlation between the fatigue life of bearings and operating temperature, and the fatigue life may decrease by about 50% for every 10°C increase in temperature. Therefore, continuous high-temperature operation will significantly shorten the service life of bearings, increase the frequency of maintenance and replacement, and ultimately lead to economic losses.

In order to ensure the reliability of deep groove ball bearings in high temperature environments, it is recommended to take effective temperature control measures, including optimizing the selection of grease and regular replacement to ensure that it maintains good performance within the operating temperature range. At the same time, regularly monitor the operating temperature and operating status of the bearings, and promptly discover and solve potential problems to extend the service life of the bearings and reduce maintenance costs. Through these measures, the reliability and economy of deep groove ball bearings can be effectively improved, providing a strong guarantee for the stable operation of equipment.