Lubricating oil history
1. Ancient Times: The Use of Natural Materials
The initial stage: The earliest human concept of "lubrication" originated from reducing friction. When the ancient Egyptians built the pyramids, they used water or grease to lubricate the sliding tracks for transporting the massive stones. During the Shang and Zhou dynasties in China, there are also records of using animal fat to lubricate the axles of war chariots.
Main materials: animal fats (beef tallow, mutton tallow), vegetable oils (olive oil, castor oil), and mineral graphite. These materials are readily available, but their drawbacks are pronounced: they are prone to oxidation and deterioration, emit foul odors, and exhibit extremely poor thermal stability.
2. 19th Century: The Discovery of Mineral Oil and the Birth of Grease
This is the first great leap in the development of lubrication technology.
The rise of the petroleum industry: In 1859, Edwin Drake drilled the first modern oil well in Pennsylvania, ushering in the era of large-scale oil extraction. Mineral base oils obtained through petroleum distillation demonstrated superior stability and greater abundance compared to animal and vegetable oils, rapidly becoming the dominant base oils for lubricants.
The invention of grease: The pivotal figure was Robert Chesbrough. In the 1850s, he noticed oil drillers complaining about a waxy residue on drill pipes (actually petroleum sludge) that seemed to provide excellent sealing and lubrication. Inspired by this, he developed the world's first modern grease—calcium-based grease—by saponifying mineral oil with lime and thickening it. Due to its fibrous appearance, it was nicknamed "Grease." This marked a milestone in the history of grease.
3. The first half of the 20th century: The need to respond to the Industrial Revolution
With the second industrial revolution and the automobile industry booming, higher and more professional requirements are put forward to the lubricant.
New varieties emerge: To meet diverse mechanical conditions, scientists have developed various types of soap-based greases.
Sodium-based grease: exhibits superior high-temperature resistance but inferior water resistance.
Calcium-based grease: exhibits good water resistance but lacks sufficient high-temperature endurance.
Lithium-based grease: This represents a revolutionary breakthrough. In the 1940s, Earl W. Bassett invented the universal lithium-based grease. It combines excellent water resistance, mechanical stability, and a high dropping point, making it a true "multi-purpose" grease. It quickly became the most widely used variety and has maintained this position to this day.
The emergence of additive technology: To enhance the antioxidant, rust-proof, and extreme pressure wear resistance of lubricating oils, early additives were developed and applied.
4. The Second Half of the 20th Century: The Era of Synthetic Oils and High-Performance Composite Lubricants
After World War II, the aerospace, military and high-tech industries have put forward strict requirements for the performance of lubricants in extreme environments (high and low temperature, high vacuum, high load).
Synthetic lubricants: Synthetic base oils (such as PAO polyalphaolefins, ester oils, silicone oils, etc.) have been developed. They exhibit superior performance unmatched by mineral oils: a wider operating temperature range, longer service life, and better chemical stability.
Composite soap-based grease: By using composite soaps (e.g., composite lithium or aluminum) as thickening agents, a high-performance grease with superior properties to traditional soap-based greases has been developed, capable of withstanding higher temperatures and loads.
Non-皂基增稠剂: Polyurea, bentonite, silica and other organic and inorganic thickener are widely used to provide solutions for special working conditions.
5. From the 21st Century to the Present: Specialization, Intelligence and Greening
The current development of lubricating greases focuses on several key directions:
Highly specialized: Grease formulations are tailored to specific equipment and applications (e.g., electric vehicles, wind turbines, robots).
Longevity and Reliability: Equipment manufacturers 'demand for extended oil change intervals or even' lifetime lubrication' has driven the development of ultra-long-life fully synthetic greases.
Environmentally friendly: Biodegradable greases (based on vegetable oils, etc.) are increasingly used in sensitive environments such as forestry, water conservancy, and marine applications.
Intelligent monitoring: By integrating sensor technology, it monitors real-time the grease's condition (viscosity, moisture content, metal particles) to enable predictive maintenance.
sum up
The historical evolution of lubricating oils is clearly documented:
Basic materials: from animal and plant oils → mineral oil → synthetic oil.
Dilution system: from simple calcium soap → multiple single soaps → compound soap/polyurea, etc.
Performance pursuit: from basic friction reduction to multifunctional protection, extreme working condition adaptability and environmental friendliness.
Its development has always been centered on the progress of human industry and technology, constantly solving the new challenges of friction, wear and sealing.