What are the friction and wear mechanisms of Deep Groove Ball Bearing under high-speed operation?

The friction and wear mechanism of Deep Groove Ball Bearing under high-speed operation is a complex process involving the interaction of multiple factors. Below is a detailed explanation of its friction and wear mechanisms:
Friction mechanism:
Sliding friction: Inside the bearing, relative sliding occurs at the contact point between the ball and the inner and outer rings, especially during high-speed operation and load changes. This sliding friction results in energy loss and heat generation.
Rolling friction: Although the ball mainly performs rolling motion, in actual operation, due to manufacturing tolerances, assembly errors and load changes, there will still be a certain sliding component between the ball and the inner and outer rings, which increases friction.
Lubrication conditions: The viscosity and supply method of lubricating oil have a direct impact on friction. Proper viscosity reduces direct metal-to-metal contact, thereby reducing friction. Inadequate or excessive lubrication can lead to increased friction.
Wear mechanism:
Surface fatigue: Under high-speed operation, contact points will be subjected to repeated compression and stretching, leading to material fatigue. After long-term operation, cracks and peeling may occur on the surface.
Adhesive wear: Due to high temperatures and pressures, metals at contact points may stick and then tear apart in relative motion, resulting in material loss.
Abrasive wear: Tiny particles (such as impurities, metal chips) that may exist inside the bearing will act as abrasive particles during operation, causing surface wear.
Chemical corrosion: Certain components in the lubricating oil may react chemically with the bearing material, causing corrosion and wear.
Other influencing factors:
Temperature: The heat generated by high-speed operation will cause the bearing temperature to increase, thereby changing the material properties and lubrication conditions, affecting friction and wear.
Load: The magnitude and distribution of load have a significant impact on bearing friction and wear. Heavy loads and high rates of load changes both increase wear.
Material: The hardness, toughness, fatigue resistance, etc. of the bearing material will directly affect its friction and wear behavior.
To sum up, the friction and wear mechanism of Deep Groove Ball Bearing under high-speed operation is a multi-factor and complex process. Bearing design, material selection, lubrication conditions, operating environment and other aspects need to be comprehensively considered to optimize its performance and Extended service life.