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Bearing grease composition and preparation method thereof

A lubricating grease composition and bearing lubrication technology, applied in the field of lubricating grease, can solve problems such as short lubrication life, short grease change cycle, short high-temperature lubrication life, etc., to improve oxidation resistance and lubrication life, and improve lubrication life , The effect of prolonging the lubrication life

Inactive Publication Date: 2021-03-19
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This also shows that commercially available and used lubricating greases generally have defects such as insufficient high temperature oxidation resistance and short lubricating life, which lead to problems such as short regreasing cycle of equipment and short working life of bearings.
[0005] To sum up, soap-based lubricating grease is still the most widely used lubricating grease so far, but the lubricating grease for commercially available industrial bearings generally has the defects of insufficient high temperature oxidation resistance and short high temperature lubrication life

Method used

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  • Bearing grease composition and preparation method thereof
  • Bearing grease composition and preparation method thereof
  • Bearing grease composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The grease sample of this embodiment

[0034] Example 1 was prepared according to the formula listed in Table 1, wherein the amounts of each component are parts by mass.

[0035] The preparation method of the lithium base lubricating grease of the present embodiment

[0036] Put 60 parts of 12-hydroxystearic acid into 540 parts of base oil, and heat up to 80-85°C to completely dissolve 12-hydroxystearic acid in the base oil. Add 8.7 parts of lithium hydroxide monohydrate to 50 parts of water, and heat to 80-85°C to completely dissolve lithium hydroxide monohydrate. Slowly add the lithium hydroxide solution into the prepared 12-hydroxystearic acid oil solution for reaction while stirring. After the feeding is completed, the temperature of the material is raised to 95-105° C., and the reaction is continued for 60 minutes. Then raise the temperature of the material to 200-210°C, and add 400 parts of base oil to rapidly cool the material. When the temperature is lowered...

Embodiment 2

[0038] The grease sample of this embodiment

[0039] Example 2 was prepared according to the formula listed in Table 1, wherein the amounts of each component are parts by mass.

[0040] The preparation method of the lithium base lubricating grease of the present embodiment

[0041]Put 100 parts of 12-hydroxystearic acid into 500 parts of base oil, and raise the temperature to 80-85°C to completely dissolve 12-hydroxystearic acid in the base oil. Add 14.5 parts of lithium hydroxide monohydrate to 80 parts of water, and heat to 80-85°C to completely dissolve lithium hydroxide monohydrate. Slowly add the lithium hydroxide solution into the prepared 12-hydroxystearic acid oil solution for reaction while stirring. After the feeding is completed, the temperature of the material is raised to 95-105° C., and the reaction is continued for 60 minutes. Then raise the temperature of the material to 200-210°C, and add 400 parts of base oil to rapidly cool the material. When the tempera...

Embodiment 3

[0043] The grease sample of this embodiment

[0044] Example 3 was prepared according to the formula listed in Table 1, wherein the amounts of each component are parts by mass.

[0045] The preparation method of the lithium base lubricating grease of the present embodiment

[0046] Put 120 parts of 12-hydroxystearic acid into 460 parts of base oil, and heat up to 80-85°C to completely dissolve 12-hydroxystearic acid in the base oil. Add 17.4 parts of lithium hydroxide monohydrate to 87 parts of water, and heat to 80-85°C to completely dissolve lithium hydroxide monohydrate. Slowly add the lithium hydroxide solution into the prepared 12-hydroxystearic acid oil solution for reaction while stirring. After the feeding is completed, the temperature of the material is raised to 95-105° C., and the reaction is continued for 60 minutes. Then raise the temperature of the material to 200-210°C, and add 400 parts of base oil to rapidly cool the material. When the temperature is lower...

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Abstract

The invention provides a bearing grease composition and a preparation method thereof. The bearing grease composition contains base oil. On the basis of the total weight parts of the bearing grease composition, the composition comprises the following components in parts by weight: 80-94 parts of base oil, wherein the base oil is at least one selected from II-type hydrogenated oil, III-type hydrogenated oil and poly-alpha-olefin; 6-20 parts of a thickening agent, wherein the thickening agent is at least one selected from lithium soap, lithium calcium soap, composite lithium, composite calcium soap and composite lithium calcium soap; 0.1 to 10 parts of potassium borate; and 0.1-10 parts of an antioxidant. According to the bearing grease composition, the oxidation stability of the compositionis improved, the high-temperature lubricating service life of the composition is prolonged, and the lubricating service life of a bearing is prolonged by three times or above compared with existing lubricating grease of the same type under the same conditions; and the bearing grease composition has extremely good application and popularization value.

Description

technical field [0001] The invention relates to the technical field of lubricating grease, in particular to a bearing lubricating grease composition and a preparation method thereof. Background technique [0002] Soap-based grease is by far the most widely used grease variety, especially lithium series grease. This kind of grease is oxidized by environmental temperature, air, metal ion catalysis, etc. during use. Due to oxidation, soap-based grease generates a large amount of aldehydes and ketones, which are further oxidized into acids, hydroxy acids, esters and other substances. The polymerization of these carbonyl-containing compounds leads to an increase in viscosity and eventually the formation of oxidation products such as gums, asphaltenes, and paint films. The above-mentioned oxidation products have no lubricating function, which will cause the seizure of the rolling bearing and thus lead to the failure of the bearing. As technology develops and the need for a cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/00C10N30/10C10N40/02C10N50/10
CPCC10M169/00C10M2201/087C10M2215/064C10M2207/1285C10M2207/1265C10M2207/127C10M2207/026
Inventor 冯强张兰英陈治吴宝杰
Owner CHINA PETROLEUM & CHEM CORP