Lubricating oil, the main features and how does it work?
Many people think that lubricant is used for ... "slippery"!!!. It is not wrong, but is not enough. Besides primary lubricity, friction
deducing function, it also reduces the wear occurs during operation, minimizes corrosion of moving surfaces, reduces amount of heat generated, reduces temperature, and assists in keeping contaminants out of the system.
1. Reducing friction and heat
Friction is the force occurs between two surfaces which are sliding over each other, it resists relative motion.
When you rub your hands, you will feel your hands being warm up. Now imagine rubbing your hands together 3,600 times a minute - your hands would be ... on fire!. Similarly, when machinery components in moving, rotating, friction will be created, it resists motion, generates heat.
If you selected correct lubricants for your equipments, appropriate to speed, load, working temperature, lubricating oil will create a lubrication film between two surfaces to separate them, does not allow them contact directly. Therefore, friction will be minimized, so reduces the loss of energy and minimizes the heat generated (by friction). The heat is absorbed by lubricating oil then, as result machinery will be cooled. Conversely, it increases waste of energy, machinery is too hot that can seize the bearings.
Heated oil is cooling down by some different methods later.
2. Reducing wear and erosion
How smooth and polished the moving surfaces made, they are actually rough and craggy (we can see in micrograph). During surfaces are sliding each other, pieces of the protrusive weaker material break off and they scrape against opposing surface, continue creating abrasion. To prevent this wear, similarly the way of friction reducing, lubricating oil creates a lubrication film introduce between sliding surfaces to separate them apart, leading they can not contact each other directly. As result, prevent, lessen abrasion of protrusive material break.
3. Remove impurity particles
The presence of impurity particles can cause major damage for machineries, it creates hug erosion, especially in situations where the slot between two sliding surfaces is very very narrow about micron (e.g. slot of slide bearing). These particles can enter from outside or created from abrasion (we can only just minimize, can not completely eliminate abrasion). Lubricating oil also has ability to attract to these contaminants, suspend them in the lubricant, and then transfer them out. This property is often obtained by additives.
Contaminated lubricant is usually filtered to remove contaminants by separators later.
4. Protect against corrosion ad oxidation
Corrosive wear and oxidation occur when the component surfaces contact, react with water, and or air. Lubricant helps to prevent this contact (often by adding additives)
Conclusion: Lubricating oil creates a film between relative moving surfaces. This film helps to reduce friction, heat, and wear. Using the correct lubricating oil hepls maximize the life of your machineries, therefore saving money, time, and manpower, thus making operations more reliable.
Compatibility of synthetic base oils with plastic and Elastomer
Lubricants protect your components from wear and corrosion and should be treated as critical design component. But different lubricant chemistries