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details Compressor oil in general condition，According to the type of basic oil, it can be divided into two categories: mineral oil compressor oil and raw compressor oil.According to the structure of the compressor can be divided into reciprocating gas compressor oil and tubular gas compressor oil two kinds;According to the characteristics of the reduced vapor body is divided into gas compressor oil and vapor body compressor oil;According to gas compressor light, medium and heavy load compression oil。
Compressor oil is used to lubricate compressor parts (cars, gate valves), and is used as a sealing material for reducing chambers。For most compressors, the temperature of the gas or vapor body after each stage of reduction is generally more than 170 ~ 180 ° C, but it is also the temperature of the piston compressor inlet and outlet with higher thermal compressive strength exceeds 220 ° C。In order to ensure the non-hazardous operation of the compressor, increase the oil change period, maintain the air pressure system clean, reduce friction and drive system energy consumption, the compressor oil should have excellent heat resistance, avoid the formation of carbon deposits, but also have excellent corrosion resistance, anti-emulsion and anti-foam characteristics。
1、粘度
The suitable viscosity can make the compressor have excellent lubrication, cooling and sealing efficiency under the operating temperature and working pressure to ensure the normal operation of the compressor。Under the standard of driving force lubrication, the thickness of the oil film increases with the viscosity of the oil, but the sliding friction also increases with the viscosity of the oil。Lubricating oil with too low viscosity is not easy to produce sufficient strong oil film, which will speed up wear and reduce the service life of parts。On the contrary, the viscosity of the lubricating oil is too high, which will increase the internal sliding friction, expand the specific power of the compressor, and even expand the functional loss and fuel consumption, and also produce deposits in the engine piston tank body, valves, and exhaust pipe safety channels。Under the premise of ensuring lubrication, the appropriate viscosity has important hazards for energy saving and reliable operation of the compressor。
2. Viscosity temperature
The oil injection internal cooling tube type gas compressor is constantly heated and cooled during the whole process of operation。Therefore, the viscosity of the oil can not be changed greatly because of the temperature change, and it should have excellent viscosity temperature。
3. Open flash point
The open flash point indicates the working pressure of the steam produced by heating the oil at atmospheric pressure, so as to use the lower concentration value of the fire ignition temperature。The opening flash point is too high, the oil fraction is heavy, the viscosity is large, the leaching quality and other components are high, and the application is easy to accumulate carbon。If one-sided emphasis on the compressor oil with high opening flash point, it will become a harmful factor。Therefore, the open flash point of the compressor oil is suitable。
4. Carbon deposition selectivity
How is the carbon resistance selectivity of compressor oil particularly important for the reliable operation of compressor oil。In specific industrial production applications, the hidden danger of fire and explosion caused by carbon accumulation in large and small compressors has become commonplace。The emission system has carbon accumulation, which may make the automatic exhaust valve not close tightly, and the actual refrigeration effect is poor, so that the exhaust pipe temperature rises, the compressor has common faults, and even fire and explosion, so the carbon accumulation selectivity of the compressor is good。
Because the exhaust pipe temperature of the compressor is generally 120 ~ 200 ° C, it is possible to achieve 300 ° C, and the compressor oil is easy to oxidize at high temperatures and mold to form sludge。
6. Anti-corrosion and anti-rust handling
The material of the oil refrigeration and other components of the compressor is copper or copper metal material, which is easy to be etched, which will make the oil appear early oxidation mold and form sludge。This requires that the oil must have excellent corrosion resistance。The water in the air is easy to refrigerate in the compressor cylinder of intermittent practical operation, which will be bad for lubrication and can cause wear and rust, and the compressor oil should have excellent anti-rust effect。
7, oil and water separation
The compressor continues to meet the condensed water in the air during operation and is strongly mixed, which is easy to cause emulsification, resulting in unclear separation of oil and gas and increased fuel consumption。Because the oil is destroyed by the emulsion, the oil film is worn out。The oil of the emulsion will drive the dispersion of dust, gravel and silt, endangering the function of the valve and promoting friction, wear and oxidation。Therefore, high-quality compressor oils have good emulsion resistance and oil-water separation characteristics。
8. Demulsification
Tubular compressor oil in the whole process of circulation system application, the circulation system speed is faster, so that the oil is in a strong mixing situation, it is very easy to cause foam。When the compressor oil is starting or relieving pressure, the oil in the oil pool is also easy to bubble, and a lot of oil foam is injected into the oil and gas separation equipment, which expands the friction resistance and improves the fuel consumption, which will lead to more serious load, overheating and other abnormal situations。Therefore, excellent tube typeCompressor oilAnti-foam preservatives are added to ensure that the foam selectivity (i.e., foaming) of the oil product is small and the foam reliability is good。
9、其他
It also stipulates that the volatile matter of the oil is small, the suitable pour point, and the characteristics of no mechanical equipment residue and water are free to ensure that the compressor can operate harmlessly for a long time。
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