Lubricating oil composition and preparation method thereof

Abstract

The invention relates to the technical field of lubricating oil, in particular to a lubricating oil composition and a preparation method thereof. The lubricating oil composition comprises the following components in parts by weight: 56-90 parts of base oil, 10 to 22 parts of a viscosity index improver, 0-1 part of a pour point depressant, 1-2 parts of an extreme-pressure anti-wear agent, 0.05 to 0.25 part of an antioxidant, 0.01-0.4 part of a corrosion inhibitor, and 0.0005-0.0015 part of an anti-foaming agent, wherein the base oil comprises mineral oil and synthetic oil; the kinematic viscosity of the mineral oil at 40 DEG C is 80-660 mm<2>/s; and the kinematic viscosity of the synthetic oil at 40 DEG C is 170-1500 mm<2>/s. According to the invention, the mineral oil and synthetic oil with specific viscosity are matched with other components to achieve a synergistic effect, and the finally obtained lubricating oil composition can be used for a vertical mill grinding roller bearing oilbath and has relatively excellent viscosity-temperature characteristics, oxidation resistance and extreme-pressure wear resistance.

Description

technical field [0001] The invention relates to the technical field of lubricating oil, in particular to a lubricating oil composition and a preparation method thereof. Background technique [0002] Vertical mill is a large industrial grinding equipment. Its working principle is to drive the grinding disc to rotate through the drive motor and reducer, the material falls from the feeding port to the center of the grinding disc, moves to the edge of the grinding disc under the action of centrifugal force and is crushed by the grinding roller, and the crushed material overflows from the edge of the grinding disc, and at the same time It is brought into the high-efficiency powder classifier by the high-speed upward hot air flow from the air ring, and the coarse powder is sorted and then returned to the grinding disc for re-grinding. Coarse materials that are not carried by the hot air flow settle from the air ring, and are fed into the mill through the bucket elevator of the ex...

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Problems solved by technology

[0003] The grinding roller is the key component of the vertical mill. Due to the large load and slow running speed of the grinding roller bearing, ordinary industrial closed gear oil with a viscosity level of ISO VG320-680 is often used for circulating lubrication. However, the disadvantage of using circulating lubrication is that the equipment investment , site occupancy, lubrication management costs are high

At present, users tend to choose the oil bath lubrication method to solve the above problems, but because the heat generated by the friction of the grinding roller during oil bath lubrication cannot be dissipated in time, the operating temperature of the lubricating oil is usually as high as 80-90°C, and there are high requirements for the assembly accuracy of the grinding roller bearings , Inconvenient oil change operation and other characteristics of use, if the use of ordinary gear oil cannot meet the requirements of ensuring sufficient oil film thickness and long oil change intervals at high temperatures, choosing a fully synthetic gear oil with good high temperature resistance will be expensive and lubricating oil consumption high cost problem

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