What is the lubrication mechanism and selection strategy of Ultra-high Speed ​​Integrated Bearing?

The lubrication mechanism and selection strategy of Ultra-high Speed ​​Integrated Bearing are key factors to ensure its high-speed and stable operation.
Lubrication Mechanism
Under ultra-high speed operation, the friction and wear inside the bearing will increase sharply, so an efficient lubrication mechanism is essential to reduce friction, reduce wear and increase bearing life. The lubrication mechanism of ultra-high speed integrated bearings mainly includes the following aspects:

Oil film lubrication: During ultra-high speed operation, the lubricating oil forms a thin oil film inside the bearing, separating the rolling elements from the raceway, cage and other components, thereby reducing direct contact and friction. The thickness and stability of the oil film have a direct impact on the lubrication effect, and need to be precisely controlled according to factors such as the bearing speed, load and working environment.
Elastic fluid dynamic lubrication: Under high-speed operation conditions, the pressure distribution of the lubricating oil inside the bearing will change, forming elastic fluid dynamic lubrication. This lubrication method can more effectively reduce friction and wear, but requires in-depth research on the rheological properties of the lubricating oil and the geometry of the bearing.
Cooling effect: In addition to reducing friction, lubricating oil also plays a cooling role. When running at ultra-high speed, a lot of heat will be generated inside the bearing. If it cannot be dissipated in time, it will lead to adverse consequences such as increased bearing temperature, decreased lubricating oil viscosity, and reduced oil film thickness. Therefore, choosing the right lubricating oil and lubrication method is also crucial to maintaining the normal operating temperature of the bearing.

Selection strategy
Choose the right lubricating oil: Choose the right lubricating oil according to factors such as the bearing speed, load, working environment and lubrication method. Generally speaking, high-speed bearings need to choose lubricating oil with moderate viscosity, good anti-oxidation performance and strong anti-wear performance.
Optimize lubrication method: Choose the right lubrication method according to the specific application scenario of the bearing. Common lubrication methods include oil bath lubrication, oil spray lubrication, oil-gas lubrication, etc. Under ultra-high-speed operation conditions, oil-gas lubrication has gradually become popular due to its advantages such as good cooling effect and low oil consumption.
Regular maintenance and inspection: Regularly maintain and inspect the bearings to ensure the normal operation of the lubrication system and sufficient supply of lubricating oil. If the lubricating oil is found to be deteriorating or seriously contaminated, it should be replaced with new oil in time and the lubrication system should be cleaned.
Consider the bearing geometry and material: The bearing geometry and material also have an important influence on the lubrication effect. For example, a reasonable raceway shape and surface roughness can reduce friction and wear; while the use of high-strength, high-wear-resistant materials can extend the service life of the bearing.