The role of special oil for generator sets

What role does the diesel generator's oil play in the operation of the generator set? Here is a detailed introduction to everyone:

1. Lubrication

The primary function of generator oil is to lubricate moving parts. The oil forms a hydraulic oil film between the metal surfaces to prevent direct contact of the metal parts and reduce friction. When the oil film is insufficient to avoid direct contact of the metal parts, the following occurs: friction generates heat; local adhesion occurs; metal transfer causes scratches or seizures; extreme pressure wear control.

Modern lubricants include extreme pressure (EP) anti-wear additives. When the load on the part is high enough to form a hydraulic film, these additives form a chemically bonded molecular oil film on the metal surface under high pressure to avoid direct contact and wear. The oil washes away contaminants on important components and acts as an engine cleaner. If the engine oil is not controlled, the sludge, piston rings, valve stems and oil deposits on the oil seal, paint film and oxide buildup can cause serious damage to the engine. The oil blended with the optimum additive will keep these contaminants in suspension until the oil filtration system filters out or removes these contaminants during the oil change process.

2, protection

The oil provides a protective barrier that isolates non-similar metals to avoid corrosion. Corrosion, like wear and tear, can cause metal debris on engine parts to fall off. Abrasion is like a slow-acting wear process.

3, hydraulic action

The oil also has a hydraulic medium on the engine, typical applications such as Jackbell brakes and STC injectors. Additive motor oil relies on additives to resist special contaminants over their useful life. The effect of oil additives on the overall performance of the engine is more important than the oil itself. There are no oil additives, even the highest quality oil can not meet the engine requirements. Additives include:

( 1) Detergent or dispersant to keep the insoluble matter in suspension until the oil is changed. The oil filtration system does not filter out these suspended materials. Excessive oil change intervals can cause deposits in the engine.

( 2) Inhibitors, to maintain the stability of the oil, to avoid acid corrosion of the metal surface, and to avoid rust when the engine is not running.

( 3) Other oil additives help the oil to lubricate the engine's high load areas (such as valves and injector systems), prevent scratches and seizures, control foam formation, and prevent air from remaining in the oil. Engine oil must be proportioned in such a way that the oil does not foam due to mechanical agitation associated with many oils. Because of the insufficient protection of the oil film, the foamed oil can cause engine damage similar to the damage caused by insufficient oil.

4, cooling

The engine needs to cool the internal components, and the main cooling system cannot provide this cooling. Motor oil is an excellent heat transfer medium. Through contact with different components, heat is transferred to the oil and then to the main cooling system in the oil cooler. The oil has a lower specific heat value and is inside the engine and does not have a cooling effect. However, due to the combustion of fuel in the engine, the oil can bring the heat back to the oil tank and then dissipate it into the air to help the water tank cool the engine. The water that actually cools is the water outside the engine casing (or antifreeze liquid).

5, sealed

The oil fills the uneven surface of the cylinder liner, piston, valve stem and other internal components of the engine to seal the exhaust gas.

6, shock absorption

The oil film between the contact surfaces acts as a buffer and damping. High load areas (such as bearings, pistons, connecting rods and gear trains) must require damping. When the engine cylinder pressure rises sharply, the load on the piston, piston chip, connecting rod and crankshaft bearing is suddenly increased. This load is lubricated by the bearing, so that the impact load is buffered.