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As the name implies, lubricating oil and grease all produce lubrication effect on machinery, but why can some machinery only use grease and some machinery use lubricating oil that? I believe many friends may not have a clear distinction between lubricating oil and grease, and even many people will think that lubricating oil is grease. Today, we will come to talk to you about the difference between lubricating oil and grease.
Grease is composed of base Oil Additive thickener. Generally speaking, grease is a plastic lubricant composed of one (or several) thickener and one (or several) lubricating liquid. In order to improve the performance, the performance improver is added, that is to say, the grease has more thickener than the lubricating oil composition, and the advantage of grease is that it can stay on the lubricating surface. Suitable for low speed environment compared with lubricating oil, the advantage is that it can not need additional maintenance for a long time, has good sealing, can effectively prevent pollutants from invading the equipment, and can reduce noise and vibration, which is suitable for harsh operating conditions. Of course, nothing is absolutely perfect, and the shortcomings of grease are also very obvious, such as strong viscosity, poor liquidity, poor heat dissipation, inconvenient replacement, difficult to adjust the amount of grease, and do not have the function of cleaning impurities, which is one of the reasons why automobile engine can not use grease.
However, the disadvantage of grease is the advantages of lubricating oil, such as good liquidity, good heat dissipation, convenient replacement and good cleanliness. It is also known as the "blood" of the car, its main role is to lubricate, clean, cool, seal, reduce wear, rust and corrosion prevention. We all know that the engine is the heart of the car, and there are many metal surfaces in the engine that move against each other. These components move fast, the environment is poor, and the working temperature can reach 400 °C to 600 °C. Under such bad working conditions, only qualified lubricating oil can reduce the wear of engine parts and prolong the service life.
