What are the characteristics of air compressor lubricants

What are the characteristics of air compressor lubricants

In addition to reducing the friction, wear and temperature rise of the motion pair, air compressor lubricants. It also has the function of sealing compressed air. The lubricating oil of the air compressor directly contacts the compressed gas of high temperature and high pressure, so it is easy to cause lubrication failures that are not found in other machinery. Therefore, the basic requirements for air compressor oil are: suitable viscosity, Good oxidation stability and thermal stability, low carbon deposition tendency and the formed carbon deposition is soft and easy to fall off, good rust and corrosion resistance, good oil-water separation, higher flash point and low volatility, good Anti-foaming.

The lubrication conditions and working environment of the air compressor are relatively harsh. The lubricating oil of the air compressor parts must be recycled once within about 0.5 to 1 min. At high temperatures and in the presence of catalysts such as steel and copper, the oil is easily oxidized Deterioration, so there are certain requirements for oxidation, which is measured by oxidation stability index.

　　 In addition, due to the fast circulation speed, the oil is in a state of vigorous stirring, which is easy to form foam, especially when the operating temperature is low when starting, the oil foam is not easy to destroy, a large amount of oil foam is poured into the oil-air separator, which increases the resistance and oil consumption. If serious overload and over-temperature are caused, anti-foaming and defoaming measures must be taken.

　　This performance is measured by oil foam resistance, foam tendency and foam stability. Used for compressor cooler pipes and some parts are copper or copper alloy. It is easy to be corroded and causes early oxidation and deterioration of oil, forming sludge. The water vapor and dust in the air will inevitably be mixed into the oil, which will rust and wear the surfaces of other parts in contact with the gas. These two properties are measured by oil corrosion index and anti-rust test index.

When the compressor is in operation, the oil constantly meets the condensed water in the air and is stirred vigorously, which is easy to produce emulsification, resulting in poor oil and gas separation and increased oil consumption. The emulsification of oil will destroy the oil film and cause aggravation of wear. Therefore, the anti-emulsification is also oil An important performance.