What Is Bearing Oil Cooling?
1, Core principle
Lubrication and friction reduction: Lubricating oil forms an oil film between the rolling elements (balls/rollers) of the bearing and the raceway, reducing the friction generated by direct metal contact.
Forced cooling: The flowing lubricating oil continuously flushes the interior of the bearing, taking away the heat generated by friction and transporting it to an external radiator or oil tank for heat dissipation.
Cleaning and sealing: Oil flow can wash away metal debris generated by bearing wear, while forming an oil film barrier to prevent impurities from entering.
2, Common oil cooling methods
Oil bath lubrication: The bearing part is immersed in an oil pool and lubricated by rotating splashing, with limited cooling effect, suitable for low speed and light load.
Oil injection lubrication: The high-pressure oil pump directly sprays oil into the bearing, with high cooling efficiency, suitable for high-speed and heavy-duty applications (such as machine tool spindles and motors).
Oil mist lubrication: Compressed air atomizes oil and sprays it into bearings, providing good cooling and lubrication effects, suitable for ultra high speed and precision bearings.
Circulating oil lubrication: The oil is cooled by an external cooler and circulated for use, with the strongest cooling capacity. It is commonly used in large equipment such as rolling mills and fans.
3, Applicable scenarios
High speed operating equipment (such as high-speed motors, turbochargers)
Heavy duty working conditions (such as mining machinery, rolling mills)
Precision equipment (such as CNC machine tool spindles, aircraft engines)
Continuous operation equipment in high-temperature environments
4, Key advantages
The cooling efficiency is much higher than that of natural air cooling or grease lubrication, which can significantly reduce the working temperature of bearings.
Extend the lifespan of bearings and reduce the risk of failure caused by overheating.
Simultaneously achieving the triple functions of lubrication, cooling, and cleaning, enhancing equipment stability.
