Synthetic lubricating oil composition

Abstract

The invention relates to a synthetic lubricating oil composition. The composition comprises the following components: 82.0 to 96.33 wt% of base oil, 3 to 10 wt% of ester oil, 0.1 to 3.0 wt% of an extreme pressure anti-wear additive, 0.02 to 1.0 wt% of a metal deactivator, 0.05 to 1.0 wt% of an antirust corrosion inhibitor, 0.5 to 3.0 wt% of an antioxidant additive and 10 to 200 [mu] g / g of an antifoaming agent; wherein the base oil is water-insoluble polyether polyalkylene glycol, and the ester oil is saturated polyol ester and / or polybasic acid ester. The lubricating oil composition has the advantages of excellent viscosity-temperature performance, excellent low-temperature performance, excellent oxidation stability, excellent high-temperature cleaning performance, excellent extreme pressure antiwear property, good rust and corrosion resistance and good foam resistance, and can quickly form an oil film, reduce the operation temperature, reduce the high-temperature coking property and reduce the wear between bearing tooth surfaces.

Description

technical field [0001] The invention relates to a lubricating oil composition, in particular to a lubricating oil composition used for oil-air lubricating devices of large-scale continuous casting machines and continuous rolling mills in the metallurgical industry. Background technique [0002] The mechanism of oil-air lubrication is that lubricating oil and compressed air form a two-phase mixed oil flow in the oil-air mixer. The lubricating oil and compressed air in the two-phase mixed oil flow are not really fused, but driven by the action of compressed air to lubricate. The oil adheres around the pipe wall in the form of an oil film and moves forward at a slow speed. When it is about to reach the outlet of the oil flow, the oil film becomes thinner and thinner, and becomes one piece, and finally flows in extremely fine continuous oil droplets. Spray onto lubrication points. It should be emphasized that the flow rate of oil in the oil-air pipe is much smaller than that of...

AI Technical Summary

Problems solved by technology

[0009] At present, since the initial application of oil-air lubrication devices in my country, most of them use ordinary medium and heavy-duty industrial gear oil lubricants. Although these products can meet the requirements of general oil-air lubrication devices for oil lubrication performance, they are not suitable for high-temperature environments and low-temperature environments. Poor adaptability to harsh working conditions, mainly manifested in: 1) Poor high temperature resistance, easy to oxidize and deteriorate; 2) Easy to coke, causing the bearing to be stuck and scrapped; 3) Poor viscosity-temperature characteristics, low viscosity at high temperature The thickness of the oil film becomes smaller and the lubrication effect is poor

The reason is that the base oil of ordinary medium and heavy-duty industrial gear oils is mostly Class I mineral oil. Due to insufficient refining depth and high residual carbon value, some high-temperature systems, especially continuous casting systems, have been exposed to high-temperature and baked parts for a long time. It is easy to produce deposits such as colloid and asphaltene, which will cause blockage of the distributor's delivery pipeline, resulting in poor lubrication of the lubrication points, dry friction, bearing lockup, etc.

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