Why Does Oil-Air Lubrication Have a Higher Load-Carrying Capacity Than Oil Circulation Lubrication?
Release time:
2022-09-12
One of the key advantages of oil-air lubrication is its ability to form a stable air-oil two-phase lubricating film, which provides a significantly higher load-carrying capacity than the single-phase oil film created by conventional circulating oil systems.
Thicker and Stronger Lubricating Film
In an oil-air lubrication system, compressed air transports a precise amount of lubricant to the lubrication point, creating an air-oil two-phase flow. As the volume of microscopic air bubbles within the lubricant film increases, the thickness of the lubricating film also increases.
This results in:
- Improved oil film formation
- More uniform lubricant distribution
- Enhanced separation of metal contact surfaces
- Reduced friction and wear
Higher Load-Carrying Capacity
Unlike oil circulation systems that rely solely on a liquid oil film, oil-air lubrication forms a dynamic air-oil film with greater film strength and stability.
The advantages include:
- Better resistance to heavy loads and shock loads
- Stronger protection under high-speed operating conditions
- Reduced risk of metal-to-metal contact
- Improved bearing and gear protection
Because the lubricating film remains more stable under extreme operating conditions, the system can withstand higher surface pressures while maintaining effective lubrication.
Ideal for Metallurgical Applications
In metallurgical equipment such as:
- Continuous casting machines
- Rolling mills
- Roller tables
- Wire rod mills
- High-temperature conveying systems
Bearings and rotating components are often exposed to heavy loads, high temperatures, water spray, and contamination. The superior load-carrying capability of oil-air lubrication helps maintain reliable operation and significantly extends component service life.
Key Benefit
Compared with conventional circulating oil lubrication, oil-air lubrication generates a thicker, stronger, and more stable lubricating film, providing:
✔ Higher load-carrying capacity
✔ Better protection against wear
✔ Lower operating temperatures
✔ Longer bearing life
✔ Improved equipment reliability
This is one of the primary reasons why oil-air lubrication has become the preferred lubrication technology for demanding metallurgical applications.
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