Long-life air compressor oil composition

Abstract

The invention discloses a long-life air compressor oil composition. The long-life air compressor oil composition comprises the following components in percentage by weight: 0.6-1.5% of an ashless composite additive, 0.3%-1.0% of an antioxidant, 0.1%-0.5% of an extreme pressure anti-wear agent, and 0.002% to 0.005% of an anti-foaming agent, with the balance being base oil, wherein the base oil comprises a mixture of III-type hydrogenated base oil and alkyl naphthalene base oil or polyether base oil. The air compressor oil provided by the invention has excellent high-temperature detergency and oxidation resistance, and can effectively avoid the generation of oil sludge and carbon deposit; excellent wear resistance and hydrolytic stability are achieved, and excellent wear resistance protection is provided for the air compressor; the excellent heat conduction efficiency can help to reduce the temperature and oil temperature of the compressor; and the oil change period is long and can reach6000 hours or above. In addition, compared with known long-life air compressor oil, the air compressor oil has the advantages of being low in cost, simple in preparation method, easy to popularize and apply on a large scale and the like.

Description

technical field [0001] The invention relates to a lubricating oil composition, in particular to a long-life air compressor oil composition. Background technique [0002] The main lubricating parts of air compressor oil, especially the screw air compressor oil that currently dominates the market, are screws, bearings, gears, etc., and the oil circulates to cool, carry heat, clean, and seal the screw and shell. Compared with other types of lubricating oil, the working environment of air compressor oil is extremely harsh, mainly as follows: (1) high temperature, when the air compressor is working, the lubricating oil has to absorb the compression heat generated when the gas is compressed, and the entire operation process The medium compressor oil is a circulating heat carrier, and its working temperature has been kept above 90°C. (2) High-pressure oxidation, because the oxygen partial pressure increases with the pressure of the compressed air, and the oxidation of the compress...

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Problems solved by technology

(3) Moisture and metal catalysis, the compressor oil is prone to emulsification during operation, resulting in unclear separation of oil and gas, increased oil consumption, and at the same time, the oil is emulsified to damage the oil film, which will cause increased wear

However, these fully synthetic air compressor oils mainly have the following problems: (1) The hydrolytic stability of synthetic esters is poor, and the expansion of sealing elastomer materials is relatively large; (2) Although PAO has good high and low temperature performance Thermal oxidation stability, but the ability to dissolve carbon deposits and paint films is poor, and the compatibility with additives is poor, and the product's wear resistance is not good; (3) The use of polyether to exist with traditional mineral or PAO air compressors Oil is insoluble and often needs to be mixed with synthetic esters, which will also affect the demulsibility of the oil; (4) The cost is 3 to 4 times that of mineral air compressor oil, which is not easily accepted by users

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