Turbine oil is an important lubricant and coolant in turbine generator sets and steam turbines. However, a single base oil cannot meet all functional requirements of turbine oil, so specific additives need to be added.
Additives are added to turbine oil for the following reasons:
- Oxidation and thermal stability: Turbine oil operates at high temperatures and is exposed to oxidizing conditions. Additives are added to improve the oil’s resistance to oxidation and thermal degradation, ensuring that it maintains its performance and characteristics over long periods of operation.
- Anti-wear and friction-reducing properties: Additives help reduce wear between turbine moving parts, such as bearings and gears. They form a protective film on the surface, minimizing friction and preventing metal-to-metal contact that can lead to damage and wear.
- Corrosion protection: Turbine oil additives include corrosion inhibitors that protect the turbine’s metal surfaces from corrosion caused by water and other contaminants. These additives form a protective film on the surface, preventing rust and other types of corrosion.
- Foam control: Additives can also be used to prevent the formation of foam in turbine oil. Foam can interfere with normal turbine operation and cause lubrication problems. Foam control additives help reduce foam formation and maintain stable lubrication.
- Water separation and anti-emulsification properties: Turbine oil additives can improve the ability of oil and water to separate and maintain their anti-emulsification properties. This is important because turbines often operate in environments where water pollution is an issue. Additives help prevent the formation of stable emulsions and promote effective separation of water and oil.
In general, additives are added to turbine oil to enhance its performance, protect turbine components and extend the life of the oil. They improve the oxidative and thermal stability of oils, provide anti-wear and friction-reducing properties, protect against corrosion, control foam formation, and improve water separation and emulsification resistance.
The following are the additives added to turbine oil:
Antioxidant: Turbine oil is easily oxidized and deteriorated under high temperature and high pressure conditions, producing acidic substances and sediment, which affects the formation of oil film and the normal operation of the unit. Antioxidants can enhance the antioxidant properties of turbine oil, slow down the oxidation rate, and extend the service life of the oil.
Anti-wear agent: Turbine oil needs to have good lubricating properties to reduce unit wear. Adding anti-wear agents can increase the load-bearing capacity and anti-wear properties of the oil and prevent wear and scratches on the metal surface.
Anti-foaming agent: Turbine oil is prone to foam during use, and foam will reduce the lubrication performance and cooling effect of the oil. Anti-foaming agents can effectively inhibit the generation of foam and improve the clarity and stability of oil.
Detergent: Adding detergent to turbine oil can effectively reduce the content of impurities and pollutants in the oil and improve the cleanliness and purity of the oil. This helps reduce wear and blockage of the unit and ensures normal operation of the unit.
Preservatives: Turbine oil will be exposed to water and oxygen during use, which is prone to corrosion. Adding preservatives can enhance the anti-corrosion properties of oil and prevent corrosion and damage to metal surfaces.
In short, adding additives to turbine oil can enhance its antioxidant properties, lubricity, anti-wear, cleanliness, anti-corrosion and stability, ensure the normal operation of the unit, and extend the service life of the equipment.