Refrigerating machine oil composition and application thereof

Abstract

The invention relates to a refrigerating machine oil composition and application thereof. The refrigerating machine oil composition has the good compatibility with a mixture of a hydrocarbon refrigerant and an optional hydrocarbon refrigerant and has the high viscosity index, low pour point, good oxidation resistance and good cleanliness. The invention further provides application of the refrigerating machine oil composition in a refrigeration compressor of the mixture of the hydrocarbon refrigerant and the optional hydrocarbon refrigerant as a lubricant. The refrigerating machine oil composition is prepared from, by weight, 80.0-99.5% of base oil and 0.5-20% of lubricant additives. The base oil comprises, by weight, 20-80% of alkylbenzne and the balance alkylene glycol on the basis that the base oil accounts for 100%. The kinematic viscosity of the refrigerating machine oil composition is 2-200 mm<2> / s at the temperature of 40 DEG C.

Description

technical field [0001] The invention relates to a refrigerating machine oil composition, which is a refrigerating machine oil composition suitable for isobutane, propane or a mixture of isobutane and propane as a refrigerant. Background technique [0002] The working principle of the compression refrigeration system is to use the refrigerant to vaporize and volatilize, absorb the heat of the surrounding medium, reduce the temperature for cooling, and then compress the refrigerant through the refrigeration compressor, dissipate heat and liquefy the condenser, and then re-vaporize in the evaporator , and so on. The refrigerating machine oil that plays the role of lubrication, heat dissipation, sealing, anti-corrosion and noise reduction in the compressor has a significant impact on the performance and life of the compressor and the refrigeration system. Therefore, it is very important to choose a refrigerating machine oil with excellent performance for the compression refriger...

AI Technical Summary

Problems solved by technology

Among these refrigerating machine oil compositions, naphthenic mineral oil has the advantages of good low-temperature performance and excellent compatibility with hydrocarbon refrigerants, but poor viscosity-temperature performance and low flash point of low-viscosity oils; polyalphaolefin is a synthetic oil , the overall performance is better than that of naphthenic oil, but the miscibility between polyalphaolefin and polar additives is average, additive precipitation may occur in the refrigeration system, which may cause circulation blockage or affect the heat transfer efficiency of the refrigeration system; alkylbenzene is a synthetic Oil is more suitable for hydrocarbon refrigerants. The refrigerating machine oil composition disclosed in CN101228255A patent uses at least 80wt% alkyl phenyl oil with a molecular weight of 120~288, and its kinematic viscosity at 40°C is 3.0~7.0mm 2 / s, and contains 8wt% additives

This refrigerating machine oil has excellent low-temperature performance and good compatibility with hydrocarbon refrigerants, but its high-temperature performance and oxidation resistance are not as good as those of polyalphaolefins, and it is easy to produce coke and acidic substances under continuous high temperature and high pressure. Even adding antioxidants can only maintain After a period of time, when the anti-oxidants fail, the refrigeration oil will deteriorate rapidly

[0005] In the refrigeration oil composition, the viscosity-temperature performance, oxidation stability and corrosion resistance of the oil depend on the characteristics of the base oil. Under the long-term high-temperature and high-pressure operation of the refrigeration compressor, the oil will deteriorate rapidly, and the carbon deposits will be Affect the airtightness of the compressor, and the acid produced will cause corrosion of the valve plate and piston, etc., which will completely affect the service life and efficiency of the refrigeration compressor

Images