Precautions for selecting lubricating oil for screw air compressors

Precautions for selecting lubricating oil for screw air compressors

The difference in structure between screw air compressors and hydraulic equipment requires higher extreme pressure performance of lubricating oil Seek. Therefore, the lubricating oil of the screw air compressor contains a large amount of anti wear additives, ensuring that the lubricating oil effectively protects the rotor from wear when passing through the positive and negative rotors. The content of anti wear additives in hydraulic lubricating oil is very low, so it is necessary to be cautious and avoid seeking cheap prices. At the same time, screw air compressors have very strict requirements for lubricating oil. Therefore, when selecting the special lubricating oil for screw air compressors, not only should the working load, movement speed, working temperature, lubrication method, and operating environment be considered, but also the quality of the screw air compressor lubricating oil should be considered.

Summarize the following points to correctly select lubricating oil for air compressors.

1、 Quality of lubricating oil base oil for air compressors:

The base oil of compressor oil generally accounts for over 95% of the finished oil, so the quality of the base oil is directly related to It is related to the quality level of compressor oil, and the quality of base oil is directly related to its refining depth. The deeply refined base oil has low heavy aromatic and gum content, low residual carbon, and good antioxidant sensitivity. The base oil has a significant impact on the performance of rotary compressor oil. Therefore, high-quality hydrogenated mineral oil or synthetic oil is generally selected as the base oil for screw air compressor oil.

2、Oxidation stability of lubricating oil for screw air compressors:

During cyclic use, oil products are prone to oxidation due to continuous contact with high-temperature and high-pressure oxygen in compressed air Deterioration generates various acids, resins, asphaltenes, and other substances, causing the color of the oil to darken, the acid value to increase, the viscosity to increase, and sediment to appear, thereby reducing the amount of oil sprayed, increasing the temperature of the oil and the machine, and causing excessive wear and tear. Therefore, screw air compressor oil must have excellent oxidation stability to ensure long-term safe use of the oil.

3、 Oil water separation of lubricating oil for screw air compressors:

During operation, the compressor constantly encounters condensed water in the air and is vigorously stirred, which can easily cause emulsification Elephant, causing unclear separation of oil and gas, and increasing fuel consumption. Due to the emulsification of oil, the oil film is damaged, resulting in wear and tear. Emulsified oil can promote the dispersion of dust, gravel, and sludge, affecting the function of the valve, increasing friction, wear, and oxidation. Therefore, high-quality compressor oil has good anti emulsification performance and oil-water separation performance.

4、 Defoaming performance of lubricating oil for screw air compressors:

During the recycling process of screw compressor oil, the circulation speed is fast and the oil is in a state of intense stirring.