• 2024/12/17 9:26:41

What are the characteristics of screw air compressor lubricating oil?

Screw air compressor as an important equipment in industrial production, its operating efficiency and stability directly affect the overall efficiency of the production line. In the operation process of screw air compressor, the role of lubricating oil can not be ignored. Appropriate lubricating oil can not only improve the operating efficiency of the air compressor, but also extend the service life of the equipment. So, what characteristics do screw air compressors have for lubricating oil?

First. Quality of basic oil products

The quality of base oil is directly related to the quality of lubricating oil. Screw air compressor has very high requirements for the base oil of lubricating oil, which requires that the base oil must have good oxidation stability. This is because the working environment of screw air compressor is relatively harsh, the lubricating oil will be recycled once in about 0.5-1 minutes, and in the case of high temperature and steel, copper and other catalysts, the oil is easy to oxidize and deteriorate. Therefore, the oxidation stability of the base oil is an important index to measure the quality of screw air compressor lubricating oil.

Second, oxidation stability

Oxidation stability is one of the core requirements of screw air compressor lubricating oil. During the operation of the screw air compressor, the lubricating oil will constantly contact with the compressed gas of high temperature and high pressure, and the oil is prone to oxidation reaction under the action of high temperature and catalyst, resulting in the deterioration of the oil. If the oxidation stability of the lubricating oil is poor, it will seriously affect the operating efficiency and service life of the air compressor. Therefore, with good oxidation stability, in order to ensure that the oil can be used for a long time, to ensure the stable operation of the air compressor.

Third. Defoamer

The lubricating oil of screw air compressor is easy to form foam during the cycle use due to the fierce stirring of oil and the low starting temperature of compressor. A large amount of oil foam will pour into the oil and gas separator, increase resistance and fuel consumption, and even lead to compressor overload and overtemperature in severe cases. Therefore, excellent screw air compressor lubricating oil must have good defoaming performance, that is, small foam tendency and good foam stability. This can not only reduce the impact of oil foam on the compressor, but also improve the efficiency and stability of oil separation.

Fourth, rust and corrosion resistance

Moisture in the air is easily cooled in an intermittently running compressor, which is not conducive to lubrication and can lead to corrosion. During the operation of the screw air compressor, the cooler pipes and some parts are copper or copper alloy, which are easy to be corroded, resulting in early oxidation and deterioration of the oil and the formation of sludge. At the same time, water vapor and dust in the air will inevitably be mixed into the oil, resulting in rust and wear on the surface of other parts in contact with the gas. Therefore, the lubricating oil of screw air compressor must have good rust resistance and corrosion resistance to protect the internal parts of the compressor from corrosion and rust.

Five, carbon accumulation tendency

During the operation of the screw air compressor, the lubricating oil is constantly in contact with the compressed gas at high temperature and high pressure, which is easy to produce carbon deposition. Carbon deposition will not only reduce the operating efficiency of the compressor, but also accelerate the wear of the oil and compressor components. Therefore, the carbon resistance tendency of screw air compressor oil is very important for the stable operation of oil. In order to reduce the tendency of carbon deposition, the additives of lubricating oil should be selected as far as possible, so as to reduce the production of carbon deposition.

Six, oil-water separation

In the operation and management process of screw air compressor, the lubricating oil meets the condensate in the air and is violently stirred, which easily leads to the phenomenon of affecting emulsification. The emulsification phenomenon will lead to poor oil and gas separation, increase fuel consumption, and the destruction of oil film will aggravate the wear of parts. Therefore, the lubricating oil of screw air compressor must have good oil-water separation performance, that is, anti-emulsification performance. High-quality oils usually have good emulsification resistance and oil-water separation performance to ensure the stability of the oil and the efficient operation of the compressor.

Seven, viscosity and flash point

Screw air compressor has certain requirements for the viscosity of lubricating oil. The right viscosity of the lubricating oil can ensure that the parts inside the compressor are fully lubricated, reducing friction and wear. At the same time, too high or too low viscosity will affect the lubrication effect and the efficiency of the compressor. In addition, the flash point of lubricating oil is also one of the important indicators. High flash point lubricating oil can effectively prevent oil spontaneous combustion and protect the compressor from fire threat.

Eight, choose the right lubricating oil

In order to ensure the stable operation of the screw air compressor, the appropriate lubricating oil must be selected. Here are some considerations for selecting lubricating oil:

1. Use special oil for compressor: Screw air compressor should use special lubricating oil, do not mix different manufacturers and different models of lubricating oil. The factory information of each unit will indicate the brand of the lubricating oil, and it should be selected and used in strict accordance with the requirements.

2. Oil performance requirements: Screw type air compressor lubricating oil should have the characteristics of oxidation resistance, foam resistance, corrosion resistance and wear resistance, strong water separation, appropriate viscosity, high flash point, low pour point. These performance requirements ensure that the lubricating oil performs good lubrication, cooling, sealing and rust prevention inside the compressor.

3. Control the oil change cycle: In order to determine a reasonable oil change cycle, it is recommended to collect oil samples regularly every 3 to 6 months in the first two years to analyze the main indicators of the lubricating oil (such as viscosity, pH, flash point, ash, burning point, mechanical impurities, etc.). Determining the oil change cycle according to the actual situation can ensure that the performance of the lubricating oil is always maintained in the best condition to avoid waste and unnecessary loss.

4. System cleaning and oil filter replacement: After two years of compressor use, it is best to use lubricating oil for a "system cleaning" of the oil circuit. The method is to change the oil twice in succession, and carry out the second time after the first operation for 6 hours. If conditions permit, the oil circuit can be disassembled and cleaned. At the same time, the oil filter and oil filter element must be replaced together with the oil change to ensure the clean and efficient operation of the lubrication system.

Nine，Maintenance and management of lubricating oil

In addition to choosing the right lubricating oil, the maintenance and management of the lubricating oil of the screw air compressor is also crucial. The following are some lubricating oil maintenance and management recommendations:

1. Regularly check the quality of oil: regularly sample and analyze the lubricating oil inside the screw air compressor to check the viscosity, acid value, moisture, ash and other indicators of the oil. Once the quality of the oil is found to decline, new oil should be replaced immediately to avoid damage to the compressor.

2. Keep a clean environment: Screw air compressor should be installed in a well-ventilated environment with appropriate ambient temperature to avoid pollution of lubricating oil caused by high humidity and dusty environment. At the same time, the compressor and its surrounding area should be cleaned regularly to ensure that the oil is not contaminated.

3. Reasonable control of oil temperature: too high oil temperature of screw air compressor will accelerate the oxidation and deterioration of oil and reduce its service life. Therefore, the oil temperature of the compressor should be reasonably controlled to avoid excessive oil temperature causing adverse effects on the lubricating oil.

4. Timely replacement of the oil filter: The oil filter is an important part of the lubrication system of the screw air compressor, and its role is to filter out impurities and particles in the oil. Therefore, the oil filter should be replaced regularly to ensure the clean and efficient operation of the lubrication system.

Screw air compressor lubricating oil requirements are very strict, choose the right lubricating oil to ensure the stable operation of the compressor and extend the service life is very important. By understanding the characteristic requirements of screw air compressor for lubricating oil, and taking corresponding maintenance and management measures, we can ensure the efficient operation of compressor and the production efficiency of enterprises. I hope this article can provide you with valuable information and reference to help you achieve better results in the lubrication management of screw air compressors.