Patent Overview of Bearing Cooling Structures

Bearings, as critical mechanical transmission components, play a vital role in the reliability and efficiency of mechanical systems. Under high-speed operation and heavy-load conditions, the heat generated by bearings must be effectively controlled to prevent temperature increases, lubrication failure, or even bearing damage. Therefore, bearing cooling technology is essential for ensuring their stability and extending their service life. As modern industry places increasing demands on the operational efficiency and load-bearing capacity of machinery, bearings—as critical rotating components within mechanical equipment—- play a pivotal role. The performance of bearings directly impacts the stability and lifespan of the entire system. Under high-load and high-speed operating conditions, bearings generate significant amounts of heat. If this heat is not effectively managed and dissipated, it can lead to increased bearing temperatures, reduced lubrication performance, accelerated material fatigue, and potentially cause equipment failures or safety incidents. Therefore, the cooling structure of bearings plays a crucial role in maintaining their efficient operation and extending their service life. This paper analyzes the cooling structure of bearings. This paper aims to summarize the bearing cooling devices of different structures in recent years, identify the main problems, and provide a reference for researchers in related fields. By reviewing relevant patents related to bearing cooling devices in recent years, comparing and analyzing their advantages and disadvantages, and identifying areas for improvement. This paper analyzes the characteristics of different cooling methods, examines the main issues in their development, and provides an outlook on their prospects. The existing bearing cooling structure sacrifices part of the shaft's service life and equipment safety, or makes the overall structure more cumbersome to achieve better heat dissipation. Therefore, the existing bearing cooling structure needs to be further optimized to achieve better heat dissipation without changing the bearing load capacity and overall volume.